CN104357596B - Green leather fatting agent and method thereof prepared by Pickering emulsion method - Google Patents

Abstract

The invention relates to a green leather fatliquoring agent prepared by a Pickering emulsion method and a method thereof. Traditional leather fatliquor is obtained by chemical modification of oil or external surfactant, and other organic or inorganic compounds are introduced, which is easy to produce chemical pollution. In the present invention, nano-titanium dioxide and distilled water are added into the three-necked flask and stirred, so that the nano-titanium dioxide is evenly dispersed in the distilled water; small-molecule acrylic acid polymer and castor oil are added to the three-necked flask, and the reaction is stirred at a constant temperature; the temperature of the reaction system is cooled to 50°C , the mixed sample was transferred to an ultrasonic device for ultrasonic reaction, and the sample was cooled to room temperature after ultrasonic, that is, the Pickering emulsion method was used to prepare castor oil leather fatliquor. The fatliquoring agent obtained in the invention is not subjected to any chemical modification or added any external surfactant, has stable performance, has good application performance, and does not cause harm to the environment.

Description

Green leather fatliquoring agent prepared by Pickering emulsion method and method thereof

technical field

The invention relates to a leather fatliquor and a preparation method thereof, in particular to a green leather fatliquor prepared by a Pickering emulsion method and a method thereof.

Background technique

Fatliquor is an important leather chemical in leather processing. Fatliquor in leather production is to treat leather with oil or fatliquor under certain process conditions, so that the leather absorbs a certain amount of oil and endows the leather with plumpness, softness, elasticity and other characteristics. Traditional leather fatliquor is usually obtained by chemically modifying oil or adding surfactant, but the fatliquoring agent obtained by chemical modification or adding surfactant introduces other organic or inorganic compounds, which is easy to produce a large amount of chemical pollution. Harmful to the environment. In recent years, it has become a research hotspot at home and abroad to develop green leather chemicals that are pollution-free and have excellent performance, and to reduce or solve the pollution problem of tanning from the source.

Contents of the invention

The purpose of the present invention is to provide a kind of green leather fatliquoring agent prepared by Pickering emulsion method and its method, improve the environmental performance of leather fatliquoring agent.

The technical scheme adopted in the present invention is:

Pickering emulsion method prepares the method for green leather fatliquor, is characterized in that:

Achieved by the following steps:

Step 1: Add 2.5-5 parts by weight of nano-titanium dioxide and 45 parts by weight of distilled water into a three-necked flask, and stir for 10 minutes to uniformly disperse nano-titanium dioxide in the distilled water;

Step 2: Add 10 parts by weight of a small molecular weight acrylic acid polymer with a molecular weight between 1300-4800 and 35-45 parts by weight of castor oil into the three-necked flask, keep the temperature at 80°C, and stir for 1 hour;

Step 3: After the temperature of the reaction system is lowered to 50°C, the mixed sample is transferred to an ultrasonic device for ultrasonic reaction, and the ultrasonically cooled sample is cooled to room temperature to obtain a castor oil leather fatliquoring agent by the Pickering emulsion method.

In Step 3, the ultrasonic conditions are: 50°C, 1-1.5h, 80-115W, 2s/2s.

The leather fatliquoring agent that the method for preparing green leather fatliquoring agent is prepared as described Pickering emulsion method.

The present invention has the following advantages:

The present invention adopts the Pickering emulsion method, and under ultrasonic conditions, utilizes nano-titanium dioxide to emulsify natural oil castor oil to prepare a castor oil fatliquoring agent. It has stable performance, good application performance, and no harm to the environment. It is a green, natural and environmentally friendly leather fatliquoring agent.

detailed description

The present invention will be described in detail below in combination with specific embodiments.

The Pickering emulsion method that the present invention relates to prepares the method for green leather fatliquoring agent, realizes by following steps:

Step 1: Add 2.5-5 parts by weight of nano-titanium dioxide and 45 parts by weight of distilled water into a three-necked flask, and stir for 10 minutes to uniformly disperse nano-titanium dioxide in the distilled water;

Step 2: Add 10 parts by weight of small molecule acrylic acid polymer (molecular weight between 1300-4800) and 35-45 parts by weight of castor oil into the three-necked flask, keep the temperature at 80°C, and stir for 1 hour;

Step 3: After the temperature of the reaction system is lowered to 50°C, the mixed sample is transferred to an ultrasonic device for ultrasonic reaction, and the ultrasonically cooled sample is cooled to room temperature to obtain a castor oil leather fatliquoring agent by the Pickering emulsion method.

In Step 3, the ultrasonic conditions are: 50°C, 1-1.5h, 80-115W, 2s/2s (stop 2s for every 2s, cycle operation).

Example 1:

Step 1: Add 2.5 parts by weight of nano-titanium dioxide and 45 parts by weight of distilled water into a three-necked flask, and stir for 10 minutes to uniformly disperse nano-titanium dioxide in the distilled water;

Step 2: Add 10 parts by weight of small-molecule acrylic acid polymer (with a molecular weight between 1300-4800) and 45 parts by weight of castor oil into the three-necked flask, and keep the temperature at 80° C., and stir for 1 hour;

Step 3: After the temperature of the reaction system is lowered to 50°C, the mixed sample is transferred to an ultrasonic device for ultrasonic reaction, and the ultrasonically cooled sample is cooled to room temperature to obtain a castor oil leather fatliquoring agent by the Pickering emulsion method.

In Step 3, the ultrasonic conditions are: 50°C, 1h, 115W, 2s/2s (stop 2s for every 2s, cycle operation).

Example 2:

Step 1: Add 3.7 parts by weight of nano-titanium dioxide and 45 parts by weight of distilled water into a three-necked flask, and stir for 10 minutes to uniformly disperse nano-titanium dioxide in the distilled water;

Step 2: Add 10 parts by weight of small-molecule acrylic acid polymer (molecular weight between 1300-4800) and 40 parts by weight of castor oil into the three-necked flask, keep the temperature at 80°C, and stir for 1 hour;

Step 3: After the temperature of the reaction system is lowered to 50°C, the mixed sample is transferred to an ultrasonic device for ultrasonic reaction, and the ultrasonically cooled sample is cooled to room temperature to obtain a castor oil leather fatliquoring agent by the Pickering emulsion method.

In step 3, the ultrasonic conditions are: 50°C, 1.2h, 97W, 2s/2s (stop 2s for every 2s, cycle operation).

Example 3:

Step 1: Add 5 parts by weight of nano-titanium dioxide and 45 parts by weight of distilled water into a three-necked flask, and stir for 10 minutes to uniformly disperse nano-titanium dioxide in the distilled water;

Step 2: Add 10 parts by weight of small-molecule acrylic acid polymer (molecular weight between 1300-4800) and 35 parts by weight of castor oil into the three-necked flask, keep the temperature at 80°C, and stir for 1 hour;

Step 3: After the temperature of the reaction system is lowered to 50°C, the mixed sample is transferred to an ultrasonic device for ultrasonic reaction, and the ultrasonically cooled sample is cooled to room temperature to obtain a castor oil leather fatliquoring agent by the Pickering emulsion method.

In Step 3, the ultrasonic conditions are: 50°C, 1.5h, 80W, 2s/2s (stop 2s for every 2s, and cycle operation).

The performance testing result of the leather fatliquor prepared by Pickering emulsion method is shown in the following table:

As can be seen from the table, the properties of the leather after fatliquoring with the leather fatliquoring agent prepared by the Pickering emulsion method are equivalent to those of the leather after fatliquoring with the commercially available fatliquoring agent.

The content of the present invention is not limited to the examples listed, and any equivalent transformation of the technical solution of the present invention adopted by those of ordinary skill in the art by reading the description of the present invention is covered by the claims of the present invention.

Claims (2)

1.Pickering emulsion method is prepared the method for green leather fatting agent, it is characterized in that:

Realized by following steps:

Step 1: the distilled water of the nano titanium oxide of 2.5-5 weight portion, 45 weight portions is joined in there-necked flask, stir10min, is dispersed in distilled water nano titanium oxide;

Step 2: add again the little molecule acroleic acid polymerization of 10 weight portion molecular weight between 1300-4800 in there-necked flaskThe castor oil of thing, 35-45 weight portion, constant temperature under 80 DEG C of conditions, stirring reaction 1h;

Step 3: question response system temperature cools to 50 DEG C, aggregate sample is transferred to ultrasonic reaction in Vltrasonic device, after ultrasonicSample is cooled to room temperature, makes Pickering emulsion method and prepares castor oil leather fat;

In step 3, ultrasonic condition is: 50 DEG C, and 1-1.5h, 80-115W, 2s/2s.

2. the leather greasing that the method that Pickering emulsion method as claimed in claim 1 is prepared green leather fatting agent makesAgent.