CN115467161A - A flame retardant antibacterial agent, flame retardant and antibacterial cotton fabric, preparation method and application thereof - Google Patents

Abstract

The invention discloses a flame retardant and antibacterial agent, a flame retardant and antibacterial cotton fabric, a preparation method and an application thereof. The flame retardant and antibacterial agent of the present application contains the following components: graphene oxide (GO), phosphoric acid (H ₃ PO ₄ ), guanidine phosphate (GP) and water solvent. Among the flame retardant and antibacterial agents, the concentration of GO is 8-10 mg/ml, the concentration of H ₃ PO ₄ is 56-112 mg/ml, and the concentration of GP is 65-77 mg/ml. A flame retardant and antibacterial cotton fabric of the present application is coated with a flame retardant and antibacterial agent containing graphene oxide, phosphoric acid and guanidine phosphate on the surface of the cotton fabric, and the flame retardant and antibacterial agent cooperates with the cotton fabric in the form of non-covalent bonds and covalent bonds Combining, the introduction of graphene oxide and guanidine phosphate makes the prepared flame-retardant antibacterial cotton fabric have good antibacterial effect, the antibacterial rate against Escherichia coli and Staphylococcus aureus can reach more than 99%, and has excellent flame retardancy, limiting oxygen The index can be as high as 47.8%.

Description

A flame retardant antibacterial agent, flame retardant and antibacterial cotton fabric, preparation method and application thereof

technical field

The application belongs to the technical field of functional textiles, and specifically relates to a flame-retardant and antibacterial agent, a flame-retardant and antibacterial cotton fabric, a preparation method and an application thereof.

Background technique

Cotton fabric is widely used in our daily life due to its good comfort, excellent air permeability, hydrophilicity and degradability. However, it cannot be ignored that untreated pure cotton fabrics are highly flammable, and their excellent hydrophilicity and air permeability can easily lead to the growth of bacteria. will threaten human health and safety. Therefore, it is imperative to explore the preparation of cotton fabrics with flame-retardant and antibacterial functions.

To impart flame-retardant and antibacterial properties to cotton fabrics, cotton fabrics are usually post-treated with flame-retardant and antibacterial agents. Patent CN112663339A discloses a preparation method and application of a halide amine antibacterial flame retardant. First, an intermediate having an amino structure is synthesized with cyanuric chloride or cyanuric fluoride or both derivatives and ammonia water as raw materials. The reactive phosphorus-containing haloamine antibacterial and flame retardant precursor is prepared under the action of an acid agent, and the antibacterial flame retardant is prepared through the action of sodium hypochlorite. Cotton fabrics were finished by pad-drying method, and finally antibacterial and flame-retardant textiles were prepared under halogenation. The final functionalized cotton fabric has good flame retardant and antibacterial properties, but the preparation process is relatively complicated. Patent CN 106436321A discloses a finishing method for flame-retardant and antibacterial cotton fabrics, preparing flame-retardant and antibacterial finishing solution, adopting padding method, using flame-retardant finishing agent and organic-inorganic hybrid nano-titanium dioxide/fluorine-containing nano-silver antibacterial ethylene-propylene emulsion Cotton fabrics are finished by compounding to realize the flame retardant and antibacterial properties of cotton fabrics. The flame retardant and antibacterial cotton fabrics finally produced have continuous burning and smoldering phenomena, and the flame retardant properties are not excellent.

Contents of the invention

The purpose of this application is to overcome the deficiencies of the prior art, provide a flame retardant antibacterial agent, flame retardant and antibacterial cotton fabric, preparation method and application thereof, to solve the technical problems of unsatisfactory flame retardancy and antibacterial property of the existing cotton fabric.

In order to achieve the above application purpose, the first aspect of the present application provides a flame retardant antibacterial agent, which contains the following components: graphene oxide, phosphoric acid, guanidine phosphate and water solvent; in the flame retardant antibacterial agent, the graphite oxide The concentration of alkene is 8-10 mg/ml, the concentration of phosphoric acid is 56-112 mg/ml, and the concentration of guanidine phosphate is 65-77 mg/ml.

The second aspect of the present application provides a method for preparing a flame retardant antibacterial agent, comprising the following steps: mixing graphene oxide solution, phosphoric acid and guanidine phosphate to prepare a water-based flame retardant antibacterial agent; in the flame retardant antibacterial agent , the concentration of the graphene oxide is 8-10 mg/ml, the concentration of the phosphoric acid is 56-112 mg/ml, and the concentration of the guanidine phosphate is 65-77 mg/ml.

The third aspect of the present application provides an application of the above-mentioned flame retardant and antibacterial agent on cotton fabrics.

The fourth aspect of the present application provides a flame-retardant antibacterial cotton fabric, the surface of the flame-retardant antibacterial cotton fabric contains a flame-retardant antibacterial agent, and the flame-retardant antibacterial agent contains the following components: graphene oxide, phosphoric acid, guanidine phosphate and water solvent; in the flame retardant antibacterial agent, the concentration of the graphene oxide is 8-10 mg/ml, the concentration of the phosphoric acid is 56-112 mg/ml, and the concentration of the guanidine phosphate is 65-77 mg/ml.

In a fifth aspect of the present application, a method for preparing a flame-retardant and antibacterial cotton fabric is provided, comprising the following steps:

Prepare a water-based flame-retardant antibacterial agent containing graphene oxide, phosphoric acid and guanidine phosphate; in the flame-retardant antibacterial agent, the concentration of the graphene oxide is 8-10 mg/ml, and the phosphoric acid concentration is 56-112 mg/ml, The concentration of the guanidine phosphate is 65-77 mg/ml.

Pretreatment of cotton fabric surface;

The flame retardant and antibacterial agent is coated on the surface of the pretreated cotton fabric, and the flame retardant and antibacterial cotton fabric is obtained after drying.

Further, the pretreatment process is: soaking the cotton fabric in an alkaline solution, then washing it with water until it becomes neutral, and drying it.

Further, the alkaline solution is sodium hydroxide solution or potassium hydroxide solution.

Further, the concentration of the alkaline solution is 0.5-2 mol/L.

Further, the temperature of the drying treatment is 80-130° C., and the time is 6-10 minutes.

Compared with the prior art, the present application has the following technical effects:

A flame retardant and antibacterial agent of the present application uses graphene oxide, phosphoric acid and guanidine phosphate to construct an intumescent flame retardant integrating carbon source, acid source and nitrogen source. Antibacterial effect.

The preparation method of the flame retardant and antibacterial agent of the present application is simple, the preparation cost is low, the preparation process is green and environmentally friendly, and it is easy to realize large-scale production.

A flame retardant and antibacterial cotton fabric of the present application is coated with a flame retardant and antibacterial agent containing graphene oxide, phosphoric acid and guanidine phosphate on the surface of the cotton fabric, and the flame retardant and antibacterial agent cooperates with the cotton fabric in the form of non-covalent bonds and covalent bonds Combining, the introduction of graphene oxide and guanidine phosphate makes the prepared flame-retardant antibacterial cotton fabric have good antibacterial effect, the antibacterial rate against Escherichia coli and Staphylococcus aureus can reach more than 99%, and has excellent flame retardancy, limiting oxygen The index can be as high as 47.8%.

A preparation method of a flame-retardant and antibacterial cotton fabric of the present application utilizes the self-assembly between the graphene oxide in the flame-retardant and antibacterial agent and the cotton fabric fiber molecules to achieve the coating effect on cotton fibers, and at the same time the flame-retardant and antibacterial agent Phosphoric acid oxidizes part of -CH ₂ OH on cotton fabric fiber molecules to form -CHO, and -NH ₂ of guanidine phosphate in the flame retardant antibacterial agent reacts with -CHO to realize the C=NC connection between the flame retardant antibacterial agent and cotton fiber molecules Branch reaction, finally get flame retardant and antibacterial cotton fabric. The preparation method of the flame-retardant and antibacterial cotton fabric of the present application is simple, the preparation cost is low, the preparation process is green and environmentally friendly, and it is easy to realize large-scale production.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or prior art. Obviously, the accompanying drawings in the following description The drawings are some implementations of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

Fig. 1 is the schematic diagram of the combination mode between the flame retardant antibacterial agent provided by the embodiment of the application and the cotton fabric fiber molecule;

Fig. 2 (a) is the optical photograph of pure cotton fabric, and Fig. 2 (b) is the optical photograph of the flame-retardant antibacterial cotton fabric prepared by the embodiment 1 of the present application.

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved in the present application clearer, the present application will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

In this application, the term "and/or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone Condition. Among them, A and B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship.

In this application, "at least one" means one or more, and "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, "a, b, or at least one item (unit) of c", or, "at least one item (unit) of a, b, and c", can mean: a, b, c, a-b( That is, a and b), a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple.

It should be understood that in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and some or all steps may be executed in parallel or sequentially, and the execution order of each process shall be based on its functions and The internal logic is determined and should not constitute any limitation to the implementation process of the embodiment of the present application.

The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

The weight of the relevant components mentioned in the description of the embodiments of the present application can not only refer to the specific content of each component, but also represent the proportional relationship between the weights of the various components. The scaling up or down of the content of the fraction is within the scope disclosed in the description of the embodiments of the present application. Specifically, the mass described in the description of the embodiments of the present application may be μg, mg, g, kg and other well-known mass units in the chemical industry.

The terms "first" and "second" are only used for descriptive purposes to distinguish objects such as substances from each other, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. For example, without departing from the scope of the embodiments of the present application, the first XX can also be called the second XX, and similarly, the second XX can also be called the first XX. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

In the first aspect, the embodiment of the present application provides a flame retardant antibacterial agent, which contains the following components: graphene oxide, phosphoric acid, guanidine phosphate and water solvent; in the mixed solution of the flame retardant antibacterial agent, graphene oxide (GO) The concentration M1 of phosphoric acid (H 3 PO 4 ) is 8-10 mg/ml, the concentration M2 of phosphoric acid (H ₃ PO ₄ ) is 56-112 mg/ml, and the concentration M3 of guanidine phosphate (GP) is 65-77 mg/ml.

A flame retardant and antibacterial agent according to the embodiment of the present application uses graphene oxide, phosphoric acid and guanidine phosphate to construct an intumescent flame retardant integrating carbon source, acid source and nitrogen source, which has excellent flame retardant performance and Good antibacterial effect.

The second aspect of the embodiments of the present application provides a method for preparing a flame retardant antibacterial agent, comprising the following steps: mixing graphene oxide solution, phosphoric acid and guanidine phosphate to prepare a water-based flame retardant antibacterial agent. In the mixed solution of flame retardant and antibacterial agents, the concentration M1 of GO is 8-10 mg/ml, the concentration M2 of H ₃ PO ₄ is 56-112 mg/ml, and the concentration M3 of GP is 65-77 mg/ml.

In the specific embodiment of the present application, the following steps can be used to prepare the flame retardant and antibacterial agent: adding 15 mg/ml graphene oxide (GO) solution, phosphoric acid (H ₃ PO ₄ ), and guanidine phosphate (GP) to the water solvent, It is formulated as a mixed solution of flame retardant and antibacterial agents. The mixed solution was stirred at room temperature (25 °C) for 2-6 h.

Wherein, in the mixed solution, the concentration M1 of GO is 8-10 mg/ml, the concentration M2 of H ₃ PO ₄ is 56-112 mg/ml, and the concentration M3 of GP is 65-77 mg/ml.

The preparation method of a flame retardant and antibacterial agent in the embodiment of the present application is simple, the preparation cost is low, the preparation process is green and environmentally friendly, and it is easy to realize large-scale production.

The third aspect of the embodiments of the present application provides an application of the above-mentioned flame retardant antibacterial agent on flame retardant and antibacterial cotton fabrics.

The fourth aspect of the embodiment of the present application provides a flame-retardant antibacterial cotton fabric, the surface of the flame-retardant antibacterial cotton fabric contains a flame-retardant antibacterial agent, and the flame-retardant antibacterial agent contains the following components: graphene oxide, phosphoric acid and guanidine phosphate.

A flame retardant and antibacterial cotton fabric according to the embodiment of the present application is coated with a flame retardant and antibacterial agent containing graphene oxide, phosphoric acid and guanidine phosphate on the surface of the cotton fabric. The synergistic combination of forms, the introduction of graphene oxide and guanidine phosphate make the prepared flame-retardant antibacterial cotton fabric have good antibacterial effect, and the antibacterial rate against Escherichia coli and Staphylococcus aureus can reach more than 99%, and has excellent flame retardancy, The limiting oxygen index reached 47.8%.

In the fifth aspect of the embodiments of the present application, a method for preparing a flame-retardant and antibacterial cotton fabric is provided, comprising the following steps:

(1) Prepare a water-based flame retardant antibacterial agent containing graphene oxide, phosphoric acid and guanidine phosphate; in the mixed solution of flame retardant antibacterial agent, the concentration M1 of GO is 8-10 mg/ml, and the concentration M2 of H ₃ PO ₄ is 56-112 mg /ml, the concentration of GP M3 is 65~77mg/ml;

(2) pretreating the cotton fabric surface;

(3) Coating the flame retardant and antibacterial agent on the surface of the pretreated cotton fabric, and drying to obtain the flame retardant and antibacterial cotton fabric.

In the above step (2), the pretreatment process is as follows: the cotton fabric is soaked in an alkaline solution, and then washed to neutrality and dried. In the embodiment of the present application, the alkaline solution is sodium hydroxide solution or potassium hydroxide solution. The concentration of the alkaline solution may be 0.5-2 mol/L.

In the above step (3), the temperature of the drying treatment is 80-130° C., and the time is 6-10 minutes. The moisture on the surface of the fabric is removed by drying, and a covalent reaction occurs between the chemical components in the flame retardant antibacterial agent and the surface of the fabric during the drying process to form a C=NC covalent bond. After drying, the surface of the cotton fabric can be repeatedly coated with flame retardant and antibacterial agents to achieve better flame retardant and antibacterial effects. Specifically, in the coating process, the new intumescent flame retardant antibacterial agent prepared in step (1) can be evenly coated on the pretreated cotton fabric in step (2) by using the 250 mesh sieve-assisted scraper coating technology The front side is dried and processed; the reverse side is then coated, and the operation is repeated to obtain a double-sided coated flame-retardant and antibacterial cotton fabric. The self-assembly effect between GO in the flame retardant and antibacterial agent and cotton fiber molecules is used to achieve the coating effect on cotton fibers, and at the same time, H ₃ PO ₄ in the flame retardant and antibacterial agent oxidizes part of -CH ₂ on cotton fiber molecules OH forms -CHO, and -NH _on the GP in the flame retardant antibacterial agent reacts with -CHO to realize the C=NC grafting reaction between the flame retardant antibacterial agent and cotton fiber molecules, and finally obtain a flame retardant and antibacterial cotton fabric (antibacterial Combination mode between burning antibacterial agent and cotton fabric fiber molecule is as shown in accompanying drawing 1).

A method for preparing a flame-retardant and antibacterial cotton fabric according to the embodiment of the present application utilizes the self-assembly between the graphene oxide in the flame-retardant and antibacterial agent and the fiber molecules of the cotton fabric to realize the coating effect on the cotton fiber. The preparation method of a flame-retardant antibacterial cotton fabric according to the embodiment of the present application is simple, the preparation cost is low, the preparation process is green and environmentally friendly, and it is easy to realize large-scale production.

A flame-retardant antibacterial agent, a flame-retardant antibacterial cotton fabric, a preparation method and its application of the embodiment of the present application are illustrated below through a number of specific examples.

Example 1

Embodiment 1 of the present application provides a flame retardant and antibacterial agent, a flame retardant and antibacterial cotton fabric and a preparation method thereof, comprising the following steps:

(1) Pretreatment of cotton fabrics to activate hydroxyl groups on cotton fibers

Prepare a 1mol/L NaOH solution, soak the cotton fabric in the solution for 24 hours, then rinse with deionized water several times until the surface of the cotton fabric is nearly neutral, and dry it at 80°C for later use.

(2) Preparation of flame retardant antibacterial agent

Add 15 mg/ml graphene oxide (GO) solution, phosphoric acid (H ₃ PO ₄ ) and guanidine phosphate (GP) into the water solvent to prepare a mixed solution of flame retardant and antibacterial agent. In the mixed solution, the concentration of graphene oxide was 8 mg/ml, the concentration of phosphoric acid was 84 mg/ml, and the concentration of guanidine phosphate was 65 mg/ml, and stirred and reacted at room temperature (25° C.) for 4 hours to obtain a water-based flame retardant antibacterial agent.

(3) Preparation of flame-retardant and antibacterial cotton fabric

Using the 250-mesh sieve assisted blade coating technique, the new intumescent flame retardant prepared in step (2) was uniformly coated on the front of the cotton fabric pretreated in step (1), and dried at a temperature of 130°C for 6 min Afterwards, the opposite side is coated, and the operation is repeated 6 times to obtain a double-sided coated flame-retardant and antibacterial cotton fabric.

Example 2

Embodiment 2 of the present application provides a flame retardant and antibacterial agent, a flame retardant and antibacterial cotton fabric and a preparation method thereof, comprising the following steps:

(1) Pretreatment of cotton fabrics to activate hydroxyl groups on cotton fibers

Prepare a 1mol/L NaOH solution, soak the cotton fabric in the solution for 24 hours, then rinse with deionized water several times until the surface of the cotton fabric is nearly neutral, and dry it at 80°C for later use.

(2) Preparation of flame retardant antibacterial agent

Add 15 mg/ml graphene oxide (GO) solution, phosphoric acid (H ₃ PO ₄ ) and guanidine phosphate (GP) into the water solvent to prepare a mixed solution of flame retardant and antibacterial agent. In the mixed solution, the concentration of graphene oxide was 10 mg/ml, the concentration of phosphoric acid was 84 mg/ml, and the concentration of guanidine phosphate was 65 mg/ml, and stirred and reacted at room temperature (25° C.) for 4 hours to obtain a water-based flame retardant antibacterial agent.

(3) Preparation of flame-retardant and antibacterial cotton fabric

Using the 250-mesh sieve assisted blade coating technique, the new intumescent flame retardant prepared in step (2) was uniformly coated on the front of the cotton fabric pretreated in step (1), and dried at a temperature of 80°C for 10 min Afterwards, the opposite side is coated, and the operation is repeated 6 times to obtain a double-sided coated flame-retardant and antibacterial cotton fabric.

Example 3

Embodiment 3 of the present application provides a flame retardant and antibacterial agent, a flame retardant and antibacterial cotton fabric and a preparation method thereof, comprising the following steps:

(1) Pretreatment of cotton fabrics to activate hydroxyl groups on cotton fibers

Prepare a 1mol/L NaOH solution, soak the cotton fabric in the solution for 24 hours, then rinse with deionized water several times until the surface of the cotton fabric is nearly neutral, and dry it at 80°C for later use.

(2) Preparation of flame retardant antibacterial agent

Add 15 mg/ml graphene oxide (GO) solution, phosphoric acid (H ₃ PO ₄ ) and guanidine phosphate (GP) into the water solvent to prepare a mixed solution of flame retardant and antibacterial agent. In the mixed solution, the concentration of graphene oxide was 10 mg/ml, the concentration of phosphoric acid was 84 mg/ml, and the concentration of guanidine phosphate was 65 mg/ml, and stirred and reacted at room temperature (25° C.) for 4 hours to obtain a water-based flame retardant antibacterial agent.

(3) Preparation of flame-retardant and antibacterial cotton fabric

Using the 250-mesh sieve assisted blade coating technique, the new intumescent flame retardant prepared in step (2) was uniformly coated on the front of the cotton fabric pretreated in step (1), and dried at a temperature of 130°C for 6 min Afterwards, the opposite side is coated, and the operation is repeated 6 times to obtain a double-sided coated flame-retardant and antibacterial cotton fabric.

Example 4

Embodiment 4 of the present application provides a flame retardant and antibacterial agent, a flame retardant and antibacterial cotton fabric and a preparation method thereof, comprising the following steps:

(1) Pretreatment of cotton fabrics to activate hydroxyl groups on cotton fibers

Prepare a 1mol/L NaOH solution, soak the cotton fabric in the solution for 24 hours, then rinse with deionized water several times until the surface of the cotton fabric is nearly neutral, and dry it at 80°C for later use.

(2) Preparation of flame retardant antibacterial agent

Add 15 mg/ml graphene oxide (GO) solution, phosphoric acid (H ₃ PO ₄ ) and guanidine phosphate (GP) into the water solvent to prepare a mixed solution of flame retardant and antibacterial agent. In the mixed solution, the concentration of graphene oxide was 8 mg/ml, the concentration of phosphoric acid was 56 mg/ml, and the concentration of guanidine phosphate was 65 mg/ml, and stirred and reacted at room temperature (25° C.) for 4 hours to obtain a water-based flame retardant antibacterial agent.

(3) Preparation of flame-retardant and antibacterial cotton fabric

Using the 250-mesh sieve assisted blade coating technique, the new intumescent flame retardant prepared in step (2) was uniformly coated on the front of the cotton fabric pretreated in step (1), and dried at a temperature of 80°C for 10 min Afterwards, the opposite side is coated, and the operation is repeated 6 times to obtain a double-sided coated flame-retardant and antibacterial cotton fabric.

Example 5

Embodiment 5 of the present application provides a flame retardant and antibacterial agent, a flame retardant and antibacterial cotton fabric and a preparation method thereof, comprising the following steps:

(1) Pretreatment of cotton fabrics to activate hydroxyl groups on cotton fibers

Prepare a 1mol/L NaOH solution, soak the cotton fabric in the solution for 24 hours, then rinse with deionized water several times until the surface of the cotton fabric is nearly neutral, and dry it at 80°C for later use.

(2) Preparation of flame retardant antibacterial agent

Add 15 mg/ml graphene oxide (GO) solution, phosphoric acid (H ₃ PO ₄ ) and guanidine phosphate (GP) into the water solvent to prepare a mixed solution of flame retardant and antibacterial agent. In the mixed solution, the concentration of graphene oxide was 8 mg/ml, the concentration of phosphoric acid was 112 mg/ml, and the concentration of guanidine phosphate was 65 mg/ml, and stirred and reacted at room temperature (25° C.) for 4 hours to obtain a water-based flame retardant antibacterial agent.

(3) Preparation of flame-retardant and antibacterial cotton fabric

Using the 250-mesh sieve assisted blade coating technique, the new intumescent flame retardant prepared in step (2) was uniformly coated on the front of the cotton fabric pretreated in step (1), and dried at a temperature of 80°C for 10 min Afterwards, the opposite side is coated, and the operation is repeated 6 times to obtain a double-sided coated flame-retardant and antibacterial cotton fabric.

Example 6

Embodiment 6 of the present application provides a flame retardant antibacterial agent, a flame retardant antibacterial cotton fabric and a preparation method thereof, comprising the following steps:

(1) Pretreatment of cotton fabrics to activate hydroxyl groups on cotton fibers

Prepare a 1mol/L NaOH solution, soak the cotton fabric in the solution for 24 hours, then rinse with deionized water several times until the surface of the cotton fabric is nearly neutral, and dry it at 80°C for later use.

(2) Preparation of flame retardant antibacterial agent

Add 15 mg/ml graphene oxide (GO) solution, phosphoric acid (H ₃ PO ₄ ) and guanidine phosphate (GP) into the water solvent to prepare a mixed solution of flame retardant and antibacterial agent. In the mixed solution, the concentration of graphene oxide was 8 mg/ml, the concentration of phosphoric acid was 84 mg/ml, and the concentration of guanidine phosphate was 43 mg/ml, and stirred and reacted at room temperature (25° C.) for 4 hours to obtain a water-based flame retardant antibacterial agent.

(3) Preparation of flame-retardant and antibacterial cotton fabric

Using the 250-mesh sieve assisted blade coating technique, the new intumescent flame retardant prepared in step (2) was uniformly coated on the front of the cotton fabric pretreated in step (1), and dried at a temperature of 80°C for 10 min Afterwards, the opposite side is coated, and the operation is repeated 6 times to obtain a double-sided coated flame-retardant and antibacterial cotton fabric.

The limiting oxygen index (LOI: %), vertical combustion charcoal length, tensile strength and antibacterial performance of the flame-retardant antibacterial cotton fabric prepared in Examples 1 to 6 of the present application were tested, and the test results are shown in the following table.

Among them, the limit oxygen index test is based on the GB/T5454-1997 "Textile Combustion Performance Determination - Oxygen Index Method" standard, which is to place the sample under vertical test conditions, and just maintain the lowest oxygen level for combustion in the mixed flow of oxygen and nitrogen. Concentration (also known as limiting oxygen index) test method. Put the sample clamp on the sample clamp and place it vertically in the combustion cylinder. In the upward flowing oxygen and nitrogen flow, ignite the upper end of the sample, observe its combustion characteristics, and compare the after-burning time with the specified limit value (no more than 2min) Or damage length (not exceeding 40mm). Through the test of a series of samples in different oxygen concentrations, the lowest oxygen concentration value expressed by the oxygen percentage content when maintaining combustion can be measured.

Tensile strength test: use a universal tensile testing machine to measure the tensile strength of the flame-retardant cotton fabric. The fabric size is cut to 30mm×100mm, the gauge length is set to 30mm, the fabric stretching speed is 20mm/min, and the average value is obtained after each sample is tested 5 times.

Antibacterial performance test: Antibacterial performance is carried out with reference to GB/T 20944.3-2008 "Evaluation of Antibacterial Performance of Textiles Part 3: Oscillating Method". Staphylococcus aureus and Escherichia coli were used as standard strains in the experiment. Visual evaluation of the antibacterial properties of flame-retardant antibacterial cotton fabrics by plate counting.

As can be clearly seen from the above table, the flame-retardant and antibacterial cotton fabrics prepared in Examples 1 to 6 have excellent flame-retardant properties compared to pure cotton fabrics (LOI is 18%, and do not possess flame-retardant and antibacterial capabilities). , and the antibacterial rates against Escherichia coli and Staphylococcus aureus are above 99%.

The above examples only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (9)

1. A flame-retardant antibacterial agent characterized by comprising the following components: graphene oxide, phosphoric acid, guanidine phosphate and an aqueous solvent; in the flame-retardant antibacterial agent, the concentration of the graphene oxide is 8-10 mg/ml, the concentration of the phosphoric acid is 56-112 mg/ml, and the concentration of the guanidine phosphate is 65-77 mg/ml.

2. The preparation method of the flame-retardant antibacterial agent is characterized by comprising the following steps: mixing the graphene oxide solution, phosphoric acid and guanidine phosphate to prepare a water-based flame-retardant antibacterial agent;

in the flame-retardant antibacterial agent, the concentration of the graphene oxide is 8-10 mg/ml, the concentration of the phosphoric acid is 56-112 mg/ml, and the concentration of the guanidine phosphate is 65-77 mg/ml.

3. Use of a flame retardant, antibacterial agent according to claim 1 or 2 on cotton fabric.

4. The flame-retardant antibacterial cotton fabric is characterized in that the surface of the flame-retardant antibacterial cotton fabric contains a flame-retardant antibacterial agent, and the flame-retardant antibacterial agent contains the following components: graphene oxide, phosphoric acid, guanidine phosphate and a water solvent; in the flame-retardant antibacterial agent, the concentration of the graphene oxide is 8-10 mg/ml, the concentration of the phosphoric acid is 56-112 mg/ml, and the concentration of the guanidine phosphate is 65-77 mg/ml.

5. A preparation method of a flame-retardant antibacterial cotton fabric is characterized by comprising the following steps:

preparing a water-based flame-retardant antibacterial agent containing graphene oxide, phosphoric acid and guanidine phosphate;

in the flame-retardant antibacterial agent, the concentration of the graphene oxide is 8-10 mg/ml, the concentration of the phosphoric acid is 56-112 mg/ml, and the concentration of the guanidine phosphate is 65-77 mg/ml.

Pretreating the surface of the cotton fabric;

and coating the flame-retardant antibacterial agent on the surface of the pretreated cotton fabric, and drying to obtain the flame-retardant antibacterial cotton fabric.

6. The method for preparing a flame-retardant antibacterial cotton fabric according to claim 5, wherein the pretreatment process is as follows: the cotton fabric is soaked in alkaline solution, washed to be neutral and dried to obtain the cotton fabric.

7. The method for preparing a flame retardant antibacterial cotton fabric according to claim 6, wherein the alkaline solution is a sodium hydroxide solution or a potassium hydroxide solution.

8. The method for preparing a flame retardant antibacterial cotton fabric according to claim 7, wherein the concentration of the alkaline solution is 0.5-2 mol/L.

9. The method for preparing a flame-retardant antibacterial cotton fabric according to claim 5, wherein the drying treatment temperature is 80-130 ℃ and the time is 6-10 min.

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