Hyperelastic silk fibroin micro-nano hybrid fiber aerogel as well as preparation method and application thereof

A silk fibroin and hybrid fiber technology, applied in aerogel preparation, chemical instruments and methods, separation methods, etc., can solve the problems of chemical reagent toxicity, complex process, high cost, and achieve excellent mechanical elasticity and excellent structural properties. , the effect of avoiding damage

Active Publication Date: 2022-06-24
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this study only focused on the contribution of the adhesion between SNF and PVA to improve the mechanical properties of airgel, while a large number of silk fibroin microfibrils were removed by centrifugation, and its role in improving the mechanical properties of airgel was ignored. effect
[0005] In summary, although the above methods can successfully prepare SNF, there are certain limitations, such as the prepared nanofibers cannot retain the original nanofiber structure , the process is complicated, the chemical reagents used have certain toxicity, and the cost is high, which limits the performance improvement and further application of SNF airgel

Method used

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  • Hyperelastic silk fibroin micro-nano hybrid fiber aerogel as well as preparation method and application thereof
  • Hyperelastic silk fibroin micro-nano hybrid fiber aerogel as well as preparation method and application thereof
  • Hyperelastic silk fibroin micro-nano hybrid fiber aerogel as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A preparation method of superelastic silk fibroin micro-nano hybrid fiber aerogel, comprising the following steps:

[0054] 1) Silkworm raw silk degumming: In order to avoid the damage to silk fibroin fibers caused by the alkali degumming process, the silkworm raw silk is treated by a non-alkali urea degumming process ( figure 1 shown in a), the specific operation is as follows: put 20 g of silkworm raw silk into an aqueous urea solution with a substance concentration of 8 mol / L at room temperature, then slowly heat it to 90 ° C, and degumming it at 90 ° C for 3h, silkworm The ratio of the mass of raw silk to the volume of the urea solution is 1:30g / ml; after the degumming is completed, the degummed silk is fully washed with deionized water until there is no greasy feeling, and then dried in a 40°C oven to constant weight. Degummed silk, called silk fibroin fibers, is obtained and stored in the dark.

[0055] 2) Extraction of silk fibroin micro-nano hybrid fibers: Mix ...

Embodiment 2

[0063] A preparation method of superelastic silk fibroin micro-nano hybrid fiber aerogel, comprising the following steps:

[0064] 1) silkworm raw silk degumming: with step 1 in Example 1);

[0065] 2) Extraction of silk fibroin micro-nano hybrid fibers: Mix 139.63 g of choline chloride and 90.08 g of DL-lactic acid, and heat at 100°C to form a clear and transparent liquid, namely choline chloride / Lactic acid deep eutectic solvent, wherein the ratio of the amount of choline chloride and lactic acid is 1:1; Weigh 1 g of the silk fibroin fibers obtained in Example 1, cut into pieces, and mix with 100 g of choline chloride prepared above Alkali / lactic acid deep eutectic solvent was mixed, peeled at 100 °C for 48 hours to obtain a paste-like mixture, in which the mass ratio of silk fibroin fibers and deep eutectic solvent was 1:100; deionized water was added to the paste-like mixture , the mass ratio of the two is 1:10, after mixing evenly, carry out suction filtration and washi...

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Abstract

The invention provides hyperelastic silk fibroin micro-nano hybrid fiber aerogel and a preparation method and application thereof.The preparation method includes the steps that stable silk fibroin micro-nano hybrid fiber dispersion liquid is obtained through non-alkali degumming, deep-eutectic solvent multi-scale stripping, suction filtration washing and ultrasonic dispersion; a faintly acid eutectic solvent system-urea/guanidine hydrochloride and choline chloride/lactic acid system is adopted in stripping; the method is beneficial to protecting the long chain and protein aggregation state structure of the silk, meanwhile, the weak acid system is closer to the isoelectric point of the silk, the silk has the charge neutralization characteristic, the contact area with the deep eutectic solvent system is increased, and the swelling degree is increased. The silk fibroin micro-nano hybrid fiber dispersion liquid is poured into a customized mold and then subjected to freeze-induced self-assembly and freeze-drying, and the silk fibroin micro-nano hybrid fiber aerogel is obtained and has excellent heat insulation and particle filtering performance.

Description

technical field [0001] The invention belongs to the field of aerogel materials, in particular to a superelastic silk fibroin micro-nano hybrid fiber aerogel and a preparation method and application thereof. Background technique [0002] Aerogel is a new type of three-dimensional porous material with low density, high porosity and high specific surface area. one. SiO was first prepared by Kistler in the early 1930s 2 In the past few decades, researchers have been working on the development of aerogels and have prepared different aerogels, such as Al 2 O 3 Aerogels, graphene aerogels, carbon nanotube aerogels, etc. However, aerogels suffer from severe brittleness problems due to weak interactions between the inorganic nanoparticles that make up the aerogel framework, further limiting the application of aerogels. [0003] In recent years, nanofibrous aerogels have attracted much attention due to their unique microstructure and excellent properties. Different from the nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L89/00B01D39/16B01J13/00
CPCC08J9/28B01D39/16B01J13/0091C08J2389/00
Inventor 杨海伟王宗乾杨其亮王鹏程绿竹万颖萍李长龙
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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