CN113862832A

CN113862832A - Continuous alumina fiber, preparation method thereof and heat-insulation protective fabric

Info

Publication number: CN113862832A
Application number: CN202111329746.3A
Authority: CN
Inventors: 刘点; 马小民; 马晓东; 张春苏; 赵纪周
Original assignee: Guozhuang New Material Technology Jiangsu Co ltd
Current assignee: Guozhuang New Material Technology Jiangsu Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2021-12-31
Also published as: WO2023082942A1

Abstract

The present disclosure provides a method for preparing continuous alumina fibers, comprising: preparing continuous alumina crystal fiber by a sol-gel method; boosting the continuous alumina crystal fiber by using high-pressure air and forming an alumina fiber precursor through a spinning pore channel, wherein the high-pressure is 5-7 Mpa; calcining the alumina fiber precursor at the high temperature of 1100-1400 ℃, drafting, winding and rolling to form continuous alumina fiber long fibers, wherein the drafting rate is 15-20 mm/s; the disclosure also provides a continuous alumina fiber fabric prepared by the preparation method.

Description

Continuous alumina fiber, preparation method thereof and heat-insulation protective fabric

Technical Field

The disclosure relates to the technical field of textile raw materials, in particular to a continuous alumina fiber, a preparation method thereof and a heat-insulation protective fabric.

Background

At present, alumina fibers are mainly chopped fibers and composite material members, for example, chinese patent application No. CN02802459.1 entitled alumina fiber aggregate and manufacturing method thereof, and short fibers in fabric preparation have the problems of uneven sizing, reduced fabric integrity and the like.

Disclosure of Invention

In order to solve at least one of the above technical problems, the present disclosure provides a continuous alumina fiber, a preparation method thereof, and a thermal insulation protective fabric.

According to one aspect of the present disclosure, a method of making continuous alumina fibers includes:

taking an aluminum-containing inorganic substance as a raw material, and preparing sol-gel by a sol-gel method;

boosting the sol gel by using high-pressure air and forming alumina fiber precursor through a spinning pore channel, wherein the high-pressure is 5-7 Mpa;

the alumina fiber protofilament is calcined at the high temperature of 1100-1400 ℃, and is drawn, wound and coiled to form continuous alumina fiber long filament, wherein the drawing speed is 15-20 mm/s.

The high-temperature calcination is carried out in an aerobic environment, and organic matters in the alumina fiber protofilament can be removed through the high-temperature calcination at 1100-1400 ℃, so that the strength is improved.

According to at least one embodiment of the present disclosure, preparing a sol-gel using a "sol-gel" method includes:

dissolving an aluminum-containing inorganic substance in deionized water, carrying out hydrolysis reaction at 70 ℃ to obtain sol, adding a high-molecular spinning auxiliary agent into the sol, and then carrying out evaporation concentration at 60-100 ℃ for 24h to obtain the sol gel.

The macromolecular spinning auxiliary agent is beneficial to increasing the spinnability of the sol-gel.

According to at least one embodiment of the present disclosure, the polymeric spinning aid is one or more of polyvinylpyrrolidone, polyvinyl alcohol, or polyethylene glycol.

According to at least one embodiment of the present disclosure, the aluminum-containing inorganic substance is at least two of aluminum oxide, elemental aluminum, aluminum chloride, aluminum propoxide, and aluminum nitrate.

A continuous alumina fiber fabric is formed by weaving continuous alumina fibers; the continuous alumina fiber is prepared by the preparation method of the continuous alumina fiber.

According to at least one embodiment of the present disclosure, the continuous alumina fiber fabric is woven by the continuous alumina fibers in a plain orthogonal manner.

According to at least one embodiment of the present disclosure, the warp and weft floats of the continuous alumina fiber fabric are the same.

Protective clothing made of the continuous alumina fiber fabric.

The beneficial effects of this disclosure are: the method combines the inorganic fiber preparation method with the fabric weaving, and provides a new method for preparing the high-temperature-resistant heat-insulating garment material. Meanwhile, a technical support and a theoretical basis are provided for the development market of the inorganic fiber woven fabric, and the further expansion and application of the textile fabric market are facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a scanning electron micrograph of a continuous alumina fiber made according to the present disclosure, produced by Hitachi corporation under the model TM4000p lus.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1:

adding aluminum chloride and deionized water into a reaction kettle for dissolving, heating to 70 ℃, then adding simple substance aluminum into the reaction kettle, adding polyvinylpyrrolidone after complete hydrolysis reaction, and carrying out evaporation concentration for 24h at the temperature of 60-100 ℃ until the viscosity of the filament can be adjusted to obtain sol-gel. Dry spinning is adopted, and the sol-gel is formed into filaments by being boosted by high-pressure air of 5-7Mpa through spinning pore passages. The alumina fiber is formed after being calcined at the high temperature of 1100 ℃ and 1400 ℃, and the drawing speed is 15-20 mm/s. The pressure of the high pressure air is determined according to the viscosity of the sol-gel. The mass ratio of the aluminum chloride to the simple substance aluminum is 1:1-1:1.5

The continuous alumina fiber fabric can be prepared by weaving the continuous alumina fibers in the existing weaving mode, preferably, the continuous alumina fiber fabric is formed by weaving the continuous alumina fibers in a plain orthogonal mode, and the yield is higher. Furthermore, the floating points of the warp yarns and the weft yarns of the continuous alumina fiber fabric are the same.

The embodiment also provides protective clothing which is made of the continuous alumina fiber fabric.

Example 2:

adding aluminum nitrate into deionized water, dissolving in a reaction kettle, heating to 70 ℃, and then adding simple substance aluminum and aluminum chloride. After hydrolysis reaction, adding polyvinyl alcohol as an auxiliary agent, and evaporating and concentrating at 60-100 ℃ for 24h until the viscosity of the silk can be adjusted to obtain sol gel. Dry spinning is adopted, and the sol-gel is formed into filaments by being boosted by high-pressure air of 5-7Mpa through spinning pore passages. The alumina fiber is formed after being calcined at the high temperature of 1100 ℃ and 1400 ℃, and the drawing speed is 15-20 mm/s. The pressure of the high pressure air is determined according to the viscosity of the sol-gel. The mass ratio of the aluminum nitrate to the aluminum chloride to the simple substance aluminum is 2: 1: 3.

Example 3:

dissolving aluminum chloride in deionized water in a reaction kettle, heating to 70 ℃, and adding aluminum isopropoxide. Adding simple substance aluminum after hydrolysis reaction, adding auxiliary agent polyethylene glycol, and evaporating and concentrating at 60-100 deg.C for 24h to adjust the viscosity of the filament to obtain sol gel. The sol-gel is formed into filaments by high-pressure air of 5-7Mpa through spinning pore channels. The alumina fiber is formed after being calcined at the high temperature of 1100 ℃ and 1400 ℃, and the drawing speed is 15-20 mm/s. The pressure of the high-pressure air is determined according to the viscosity of the continuous alumina crystal fibers. The mass ratio of aluminum isopropoxide to aluminum chloride to simple substance aluminum is 1: 2: 3.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. A method of making continuous alumina fibers, comprising:

2. The method of making continuous alumina fibers of claim 1, wherein the step of making a sol-gel using a "sol-gel" process comprises:

3. The method of claim 2, wherein the polymeric spinning aid is one or more of polyvinylpyrrolidone, polyvinyl alcohol, or polyethylene glycol.

4. The method for producing a continuous alumina fiber according to any one of claims 1 to 3, wherein the aluminum-containing inorganic substance is at least two of alumina, elemental aluminum, aluminum chloride, aluminum propoxide, and aluminum nitrate.

5. A continuous alumina fiber fabric is characterized in that the fabric is woven by continuous alumina fibers; the continuous alumina fiber is produced by the method of producing a continuous alumina fiber according to any one of claims 1 to 4.

6. The continuous alumina fiber fabric of claim 5, wherein the continuous alumina fiber fabric is woven from the continuous alumina fibers in a plain orthogonal manner.

7. The continuous alumina fiber fabric of claim 6, wherein the warp and weft floats of the continuous alumina fiber fabric are the same.

8. Protective clothing made of a continuous alumina fiber fabric according to any one of claims 5 to 7.