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Multilayer composite film of mulberry bark fibroin protein and preparation method thereof

A multi-layer composite film and silk fibroin technology, which is applied in the field of multi-layer composite film of mulberry bark fiber silk fibroin and its preparation, to achieve the effects of rich raw materials, improved mechanical properties, and high thermal stability

Active Publication Date: 2020-06-16
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the stable structure and chemical properties of cellulose pose great challenges for the utilization of cellulose

Method used

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  • Multilayer composite film of mulberry bark fibroin protein and preparation method thereof
  • Multilayer composite film of mulberry bark fibroin protein and preparation method thereof
  • Multilayer composite film of mulberry bark fibroin protein and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of mulberry bark fibroin protein multilayer composite film, comprising the steps of:

[0037] (1) Preliminary separation of mulberry bark fiber: treat mulberry bark powder with 4% NaOH solution at room temperature for 2 h with a mass fraction, so that cellulose and hemicellulose are preliminarily separated from lignin;

[0038] (2) Identification of the purity of the mulberry bark fiber content: get 1 g of the mulberry bark fiber obtained in step (1) and carry out reaction treatment with nitric acid ethanol at 1:25 (in V / W), the reaction temperature is 100 ° C, and the reaction time is 70min, calculate the cellulose purity that described step (1) obtains after washing and drying and further separate;

[0039] (3) Modification of mulberry bark fiber: get 3 g of mulberry bark fiber obtained in step (2) and 30 mL of anhydrous pyridine and mix it in a three-necked flask, place it in an ultrasonic cleaning tank for ultrasonic pretreatment, and the ultras...

Embodiment 2

[0044] A preparation method of mulberry bark fibroin protein multilayer composite film, comprising the steps of:

[0045] (1) Preliminary separation of mulberry bark fiber: treat mulberry bark powder with 12% NaOH solution at room temperature for 2 h with a mass fraction, so that cellulose and hemicellulose are preliminarily separated from lignin;

[0046] (2) Identification of the purity of the mulberry bark fiber content: get 1 g of the mulberry bark fiber obtained in step (1) and carry out reaction treatment with nitric acid ethanol at 1:25 (in V / W), the reaction temperature is 100 ° C, and the reaction time is 70min, calculate the cellulose purity that described step (1) obtains after washing and drying and further separate;

[0047] (3) Modification of mulberry bark fiber: get 3 g of mulberry bark fiber obtained in step (2) and 30 mL of anhydrous pyridine and mix it in a three-necked flask, place it in an ultrasonic cleaning tank for ultrasonic pretreatment, and the ultra...

Embodiment 3

[0052] A preparation method of mulberry bark fibroin protein multilayer composite film, comprising the steps of:

[0053] (1) Preliminary separation of mulberry bark fiber: treat mulberry bark powder with a mass fraction of 16% NaOH solution at room temperature for 2 hours, so that cellulose and hemicellulose and lignin are preliminarily separated;

[0054] (2) Identification of the purity of the mulberry bark fiber content: get 1 g of the mulberry bark fiber obtained in step (1) and carry out reaction treatment with nitric acid ethanol at 1:25 (in V / W), the reaction temperature is 100 ° C, and the reaction time is 70min, calculate the cellulose purity that described step (1) obtains after washing and drying and further separate;

[0055] (3) Modification of mulberry bark fiber: get 3 g of mulberry bark fiber obtained in step (2) and 30 mL of anhydrous pyridine and mix it in a three-necked flask, place it in an ultrasonic cleaning tank for ultrasonic pretreatment, and the ultr...

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Abstract

The invention discloses a preparation method of a mulberry twig bark fiber / silk fibroin multilayer composite membrane. The preparation method includes the steps of: 1) initial separation of mulberry twig bark fibers; 2) identification of content and purity of the mulberry twig bark fibers; 3) modification of the mulberry twig bark fibers; 4) grafting of the mulberry twig bark fibers; 5) productionof single-layer membranes; and 6) production of the multilayer membrane. The multilayer composite membrane not only solves a problem of single physical mixing during preparation of composite membranes in the prior art, has good water absorption and moisture retention effect, has good thermostability, is reduced in crystallization degree, and is improved in mechanical properties.

Description

technical field [0001] The invention belongs to the field of biochemical industry, and relates to a multilayer composite film of mulberry bark fibroin fibroin protein and a preparation method thereof. Background technique [0002] On the one hand, the cellulose silk fibroin blend film solves the problem of poor film-forming performance of pure cellulose, and on the other hand, it also solves the problem that the pure silk fibroin film has insufficient strength when applied in a low-humidity dry environment, and the silk film is very hard and fragile. Brittle, very little problem with stretchability. The physical blending of the two can improve some problems of the single-component film through the principle of complementary properties of the composite material, so it is widely used in food, medical, chemical, cosmetic products and other fields, and has become a research hotspot. [0003] As a renewable biomass resource, mulberry branches are the main by-products of sericult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/02B32B9/04B32B33/00B32B37/00C08J5/18C08L1/02C08L1/04C08L87/00C08L89/00C08G81/00C08B15/04
Inventor 冯焕李强李雯雯张大钊毛杨杨张青云陈洁
Owner JIANGSU UNIV OF SCI & TECH
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