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A kind of cellulose/silk fibroin composite airgel long fiber and preparation method thereof

A composite aerogel and silk fibroin technology is applied in the field of cellulose/silk fibroin composite aerogel long fibers and their preparation, which can solve the problem that the silk fibroin solution becomes dry and effective measures are not taken to improve the aerogel. Mechanical properties, difficulty of aerogel fibers, etc., to achieve the effect of simple process, conducive to mass production and promotion

Active Publication Date: 2022-03-01
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, the Chinese patent application with application number 2016105261878 discloses a preparation method of silk fibroin airgel, but this method directly foams the silk fibroin aqueous solution and then dries it. If it is not processed in time during this process, In particular, high-concentration silk fibroin solution will dry quickly, which is not conducive to actual production, and no effective measures have been taken to improve the mechanical properties of airgel, so the obtained airgel fibers are difficult to have ideal strength to meet practical applications. needs

Method used

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  • A kind of cellulose/silk fibroin composite airgel long fiber and preparation method thereof
  • A kind of cellulose/silk fibroin composite airgel long fiber and preparation method thereof
  • A kind of cellulose/silk fibroin composite airgel long fiber and preparation method thereof

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Embodiment 1

[0021] Step (1), the preparation of the cellulose matrix: a large size of the thickness of 4 mm, length 280 mm, width 220 mm, is cut into a thickness of 4 mm, a width of 7 mm, a length of 9m, and a cropped fermentation The coconut is immersed in a 3% NaOH aqueous solution, and the temperature was heated with a hydropathically heated with an oil bath at a temperature of 82 ° C, and the soaking of a good fermented coconut flakes; the pH meter was monitored, and the pH was washed with deionized water. Sexual use, to obtain a cellulose matrix;

[0022] Step (2), the preparation of the silk fibroin solution: cutting the silkworm cocoon into a small piece of 8 × 8 mm, after immersion in aqueous solution of 0.09 mol / L, heated with an oil bath at 95 ° C temperature 50 ~ 60min. The degummed treatment was carried out, then removed, placed in a petri dish for 17 hours at 48 ° C for 17 hours, and lithium bromide of 10.7 mol / L after drying, the mass ratio of lithium bromide solution was 1:...

Embodiment 2

[0029] Step (1), the preparation of the cellulose matrix: cut the thickness of 2 mm to a thickness of 2 mm, a width of 5 mm, a length of 12 m, and immerse cropped fermentation coconut sheets in 4% In the NaOH aqueous solution, the temperature was heated with a hydropathically heated treatment of 120min under temperature conditions at 90 ° C, and the pH is monitored; the pH changes are monitored, and the deionized water is washed to neutral spare to obtain cellulose. Matrix;

[0030] Step (2), the preparation of the silk fibroin solution: cut the silkworm cocoons into small pieces of 10 × 10 mm, after immersion in aqueous solution of 0.02 mol / L, aqueous solution of sodium hydrogencarbonate, heated under temperature at 90 ° C for 70 min under temperature conditions Dehydrate, then removed, put it in a petri dish for 12 hours at 40 ° C for 12 hours, after drying, lithium bromide, lithium bromide, silkworm and bromide solution is 1: 10, with oil bath It was heated under a constant t...

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Abstract

The invention discloses a cellulose / silk fibroin composite airgel long fiber and a preparation method thereof, belonging to the technical field of composite materials; the composite airgel long fiber is composed of a fiber nano network and a silk fibroin gel skeleton , the microcosm is a nanoscale interpenetrating network structure, and the macrocosm is in the form of long fibers; its preparation method is to cut the fermented coconut flakes (essentially cellulose hydrogel) into long strips, purify them as the matrix material, and silk fibroin After the protein solution is compounded, tension is applied to both ends of it to elongate it to 1.5 to 4 times the original length to achieve secondary regulation of its macroscopic shape and microstructure, and then immersed in ethanol for 10 to 50mim for gelation treatment. After the silk fibroin solution is gelled in the cellulose matrix, the high-performance cellulose / silk fibroin composite airgel long fibers can be obtained.

Description

Technical field [0001] The present invention relates to the technical field of composite materials, and more particularly to cellulose / filament protein composite gas gel length fibers and preparation methods thereof. Background technique [0002] The airgel is a special drying treatment such that the liquid phase between the gel skeleton is replaced by the gas phase, while the gel skeleton is completedly retains a three-dimensional nanomaterial having a superpole structure, a unique micro Structurally imparts many excellent properties, such as ultra-low density, large specific surface area, ultra-high porosity, ultra-low thermal conductivity, etc., to heat insulation, energy storage, catalysis, separation, Battery, aerospace, etc. have good application prospects, especially in thermal insulation, which has attracted people's extensive attention. [0003] However, the unique microstructure of airgel materials also determines its inherent high brittleness while imparting many exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L89/00C08J9/28
CPCC08J9/28C08J2201/0502C08J2301/02C08J2489/00C08J2389/00C08J2401/02
Inventor 王宇彤赛华征付蕊王亚雄
Owner INNER MONGOLIA UNIV OF SCI & TECH
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