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Method for preparing composite aerogel flame retardant material from waste leather

A technology of composite airgel and flame-retardant materials, which is applied in the field of polymer materials and waste leather recycling, and can solve the problems of limited flame-retardant performance, limited amount of flame-retardant fillers, and limited applications.

Active Publication Date: 2020-10-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process of airgel in the prior art, the amount of flame retardant filler added is limited, so its flame retardant performance is limited, which limits its further application

Method used

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  • Method for preparing composite aerogel flame retardant material from waste leather
  • Method for preparing composite aerogel flame retardant material from waste leather
  • Method for preparing composite aerogel flame retardant material from waste leather

Examples

Experimental program
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Effect test

Embodiment 1

[0049] In this embodiment, the method for preparing a composite airgel flame-retardant material by using waste leather includes the following steps:

[0050] (1) Preparation of waste leather powder:

[0051] First, the waste leather is crushed into a single waste leather fiber with a length of 100nm to 300μm, and then the single waste leather fiber is added to a solid-phase force chemical reactor for grinding. Cooling circulating water is introduced during the grinding process to control the solid phase. The surface temperature of the grinding disc in the mechanochemical reactor is 25°C, the pressure is 10KN, the rotation speed is 200 rpm, and the grinding cycle is 7 times to obtain the waste leather powder;

[0052] (2) Preparation of hydrogel:

[0053] In parts by weight, at 99°C, 100 parts of polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 97% was dissolved in 900 parts of distilled water, stirred for 2 hours under heat preservation...

Embodiment 2

[0058] In this embodiment, the method for preparing a composite airgel flame-retardant material by using waste leather includes the following steps:

[0059] (1) Preparation of waste leather powder:

[0060] First, the waste leather is crushed into a single waste leather fiber with a length of 100nm to 300μm, and then the single waste leather fiber is added to a solid-phase force chemical reactor for grinding. Cooling circulating water is introduced during the grinding process to control the solid phase. The surface temperature of the grinding disc in the mechanochemical reactor is 25°C, the pressure is 8KN, the rotation speed is 200 rpm, and the grinding cycle is 7 times to obtain the waste leather powder;

[0061] (2) Preparation of hydrogel:

[0062] In parts by weight, at 99°C, 100 parts of polyvinyl alcohol with a degree of polymerization of 1800 and a degree of alcoholysis of 97% was dissolved in 1000 parts of distilled water, stirred for 2 hours under heat preservation...

Embodiment 3

[0067] In this embodiment, the method for preparing a composite airgel flame-retardant material by using waste leather includes the following steps:

[0068] (1) Preparation of waste leather powder:

[0069] First, the waste leather is crushed into a single waste leather fiber with a length of 100nm to 300μm, and then the single waste leather fiber is added to a solid-phase force chemical reactor for grinding. Cooling circulating water is introduced during the grinding process to control the solid phase. The surface temperature of the grinding disc in the mechanochemical reactor is 25°C, the pressure is 10KN, the rotation speed is 200 rpm, and the grinding cycle is 7 times to obtain the waste leather powder;

[0070] (2) Preparation of hydrogel:

[0071] In parts by weight, at 99°C, 100 parts of polyvinyl alcohol with a degree of polymerization of 1800 and a degree of alcoholysis of 97% was dissolved in 1000 parts of distilled water, stirred for 2 hours under heat preservatio...

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Abstract

The invention provides a method for preparing a composite aerogel flame-retardant material from waste leather. The method comprises the following steps: performing secondary grinding on waste leatherto obtain ultrafine waste leather powder, uniformly mixing the powder with a polyhydroxy polymer which can be used as an aerogel raw material to prepare hydrogel, and preparing the obtained hydrogel into aerogel, thereby obtaining the composite aerogel flame-retardant material. The waste leather is introduced as the main raw material of the aerogel flame-retardant material for the first time, recycling of the waste leather is achieved, meanwhile, the characteristics of being easy to operate and low in cost are achieved, the limit oxygen index of the prepared composite aerogel flame-retardant material can reach 40, and the composite aerogel flame-retardant material has the good mechanical property.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and waste leather recycling, and in particular relates to a method for preparing a composite airgel flame-retardant material by using waste leather. Background technique [0002] Leather is an important natural resource in modern society, and it is widely used in light industries such as furniture and clothing. China is a big country in leather production, with more than hundreds of millions of square meters of leather produced every year, and such a large amount of leather products will not only produce a large amount of waste leather scraps in the production process, but also the produced leather products will be treated as waste after a certain number of years of use. Solid waste disposal or recycling. However, the discarded leather scraps and leather products have been tanned, which are different from general solid waste and do not have the ability to be reprocessed, so they are dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08L89/06C08L29/04
CPCC08J9/28C08J2201/0484C08J2205/026C08J2329/04C08J2389/06C08J2429/04C08J2489/06
Inventor 李怡俊张桐瑞袁斌白时兵王琪
Owner SICHUAN UNIV
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