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Cellulose/silk fibroin composite aerogel 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: 2020-08-07
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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  • Cellulose/silk fibroin composite aerogel long fiber and preparation method thereof
  • Cellulose/silk fibroin composite aerogel long fiber and preparation method thereof
  • Cellulose/silk fibroin composite aerogel long fiber and preparation method thereof

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Embodiment 1

[0021] Step (1), preparation of cellulose matrix: Cut large-sized fermented coconut pieces with a thickness of 4mm, a length of 280mm, and a width of 220mm into strips with a thickness of 4mm, a width of 7mm, and a length of 9m, and ferment the cut Immerse the coconut flakes in 3% NaOH aqueous solution, heat them in an oil bath at a constant temperature of 82°C for 115 minutes, remove the soaked fermented coconut flakes; use a pH meter to monitor the change of pH value, wash with deionized water until medium ready for later use to obtain the cellulose matrix;

[0022] Step (2), preparation of silk fibroin solution: cut silkworm cocoons into small pieces of 8×8mm, then immerse them in 0.09mol / L sodium carbonate aqueous solution, and heat them at a constant temperature of 95°C for 50-60min in an oil bath Carry out degumming treatment, then remove it, put it into a petri dish and dry it in an oven at 48°C for 17 hours, and then immerse it in 10.7mol / L lithium bromide after drying...

Embodiment 2

[0029] Step (1), preparation of cellulose matrix: Cut the large fermented coconut flakes with a thickness of 2mm into strips with a thickness of 2mm, a width of 5mm, and a length of 12m, and dip the fermented coconut flakes into 4% In NaOH aqueous solution, use an oil bath to heat at 90°C for 120 minutes at a constant temperature, remove the soaked fermented coconut slices; use a pH meter to monitor the change in pH value, wash with deionized water until neutral for later use, and obtain cellulose matrix;

[0030] Step (2), preparation of silk fibroin solution: cut silkworm cocoons into small pieces of 10×10mm, then immerse in 0.02mol / L sodium bicarbonate aqueous solution, and heat at 90°C for 70min with an oil bath After degumming treatment, take it out, put it in a petri dish and dry it in an oven at 40°C for 12 hours. After drying, immerse it in 9.3mol / L lithium bromide. The mass ratio of silkworm cocoons to lithium bromide solution is 1:10. Heating at a constant temperatu...

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Abstract

The invention discloses a cellulose / silk fibroin composite aerogel long fiber and a preparation method thereof, and belongs to the technical field of composite materials. The composite aerogel long fiber is formed by compounding a fiber nano-network and a silk fibroin gel skeleton, is microcosmically of a nano-scale interpenetrating network structure, and is macroscopically of a long fiber shape.The preparation method comprises the following steps: cutting fermented coconut slices (essentially cellulose hydrogel) into long strips; after purification, the obtained substance serving as a base material is compounded with a silk fibroin solution; pullings force are applied to the two ends of the compound, and the length is increased to 1.5-4 times of the original length, so that secondary regulation and control over the macromorphology and microstructure are achieved; and then the obtained substance is immersed in ethyl alcohol for 10-50 min for gelation treatment, and after the silk fibroin solution is gelated in the cellulose matrix, the cellulose / silk fibroin composite aerogel long fiber with the excellent performance is obtained.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a cellulose / silk fibroin composite airgel long fiber and a preparation method thereof. Background technique [0002] Airgel is a three-dimensional nanomaterial with ultra-porous structure obtained by wet gel through special drying treatment so that the liquid phase between the gel skeleton is replaced by the gas phase, and the gel skeleton is preserved intact. The structure endows airgel materials with many excellent properties, such as ultra-low density, ultra-large specific surface area, ultra-high porosity, ultra-low thermal conductivity and other characteristics, making them useful in heat insulation, energy storage, catalysis, separation, Batteries, aerospace and many other fields have good application prospects, especially in thermal insulation, which has attracted widespread attention. [0003] However, the unique microstructure of airgel materials not only en...

Claims

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Application Information

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Patent Type & Authority Applications(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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