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Method for preparing cellulose/polyester fiber composite aerogel from waste textiles

A technology for composite airgel and waste textiles, which is applied in the field of composite airgel preparation, which can solve the problems of difficult compounding of cotton cellulose fiber and polyester fiber, and achieve the effects of difficult degradation, large output and low price

Active Publication Date: 2021-02-12
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of difficult compounding of cotton cellulose fiber and polyester fiber, the present invention intends to propose a solution, that is, to dissolve the two kinds of fibers in different organic solvents respectively, and then mix the organic solvents, so as to achieve the purpose of the present invention

Method used

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  • Method for preparing cellulose/polyester fiber composite aerogel from waste textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, a method for preparing cellulose / polyester fiber composite airgel from waste textiles comprises the following steps:

[0025] (1) Ethylenediamine pretreatment: immerse 75g of waste cotton-containing textiles in 1000mL of anhydrous ethylenediamine solution for 36 hours.

[0026] (2) Preparation of cellulose solution: immerse 50 g of waste cotton-containing textiles treated in step (1) into 286 mL of 80% NMMO aqueous solution for 36 hours, and stir the textiles every 2 hours during immersion to make the cellulose better Soluble in NMMO aqueous solution; after the dissolution time is over, filter the solution and collect the filtrate.

[0027] (3) Dissolution of polyester fibers: Mix 50g of waste polyester fiber-containing textiles with 333g of phenol, heat to dissolve, the heating temperature is 80°C, the heating time is 6 hours, stir every 30 minutes to make it fully dissolved; the dissolution time After completion, the solution was filtered at 65° C...

Embodiment 2

[0031] In this embodiment, a method for preparing cellulose / polyester fiber composite airgel from waste textiles comprises the following steps:

[0032] (1) Ethylenediamine pretreatment: immerse 50g of waste cotton-containing textiles in 1000mL of anhydrous ethylenediamine solution for 24 hours.

[0033] (2) Preparation of cellulose solution: immerse 50 g of waste cotton-containing textiles treated in step (1) into 333 mL of 70% NMMO aqueous solution for 24 hours, and stir the textiles every 1 hour during immersion to make the cellulose better Soluble in NMMO aqueous solution; after the dissolution time is over, filter the solution and collect the filtrate.

[0034] (3) Dissolution of polyester fiber: Mix 50g of waste polyester fiber-containing textiles with 500g of phenol, heat to dissolve, the heating temperature is 70°C, the heating time is 4 hours, stir every 30 minutes to make it fully dissolved; the dissolution time After completion, the solution was filtered at 70° C.,...

Embodiment 3

[0038] In this embodiment, a method for preparing cellulose / polyester fiber composite airgel from waste textiles comprises the following steps:

[0039] (1) Ethylenediamine pretreatment: immerse 100g of waste cotton-containing textiles in 1000mL of anhydrous ethylenediamine solution for 48 hours.

[0040] (2) Preparation of cellulose solution: immerse 50 g of waste cotton-containing textiles treated in step (1) into 250 mL of 90% NMMO aqueous solution for 48 hours, and stir the textiles every 3 hours during immersion to make the cellulose better Soluble in NMMO aqueous solution; after the dissolution time is over, filter the solution and collect the filtrate.

[0041] (3) Dissolution of polyester fibers: Mix 50g of waste polyester fiber-containing textiles with 250g of phenol, heat to dissolve, the heating temperature is 90°C, the heating time is 8 hours, stir every 30 minutes to fully dissolve; the dissolution time After completion, the solution was filtered at 60° C., and t...

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Abstract

The invention relates to a method for preparing cellulose / polyester fiber composite aerogel from waste textiles. The method comprises the following steps: immersing waste cotton-containing textiles inan anhydrous ethylenediamine solution for pretreatment, and then immersing the pretreated waste cotton-containing textiles in an N-methylmorpholine-N-oxide aqueous solution for dissolution; secondly,mixing the waste textiles containing the polyester fibers with phenol, and heating for dissolving; uniformly mixing an N-methylmorpholine-N-oxide aqueous solution containing cotton cellulose with a phenol solution containing polyester fibers according to a certain ratio, immersing the mixed solution into deionized water for gelatinization, and replacing the deionized water in the gel with tert-butyl alcohol to prepare wet gel; and finally, freeze-drying to obtain the aerogel. Waste cotton and waste polyester fiber textiles have the characteristics of high yield, low price, difficulty in degradation and the like, and are prepared into cellulose / polyester fiber composite aerogel, so that a new way is provided for efficient utilization of the waste cotton and the waste polyester fiber textiles.

Description

technical field [0001] The invention belongs to the technical field of composite airgel preparation, and in particular relates to a method for preparing cellulose / polyester fiber composite airgel by using waste textiles. Background technique [0002] Airgel is a nano-scale three-dimensional network structure material with air as the dispersion medium and a skeleton composed of polymers or nanoparticles. In 1931, Kistler prepared SiO by sol-gel method using sodium silicate as raw material. 2 Airgel, the discovery of this study marks the birth of airgel. At present, various airgel materials have been developed vigorously, from inorganic aerogels such as silicon oxide, titanium oxide, and aluminum oxide to organic aerogels and various composite aerogels. [0003] There are millions of tons of waste cotton and waste polyester fiber scraps in textile factories and garment factories every year. In addition, with the improvement of people's living standards, waste cotton and wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L67/00C08L1/02
CPCC08J9/28C08J2367/00C08J2401/02C08J2205/026
Inventor 崔永明赵逸飞石从众陈悟董雄伟朱立成
Owner WUHAN TEXTILE UNIV