Fibroin oxidized bacterial cellulose nano-composite membrane and preparation method thereof

A technology of bacterial cellulose and oxidative bacteria, applied in the field of textile materials, can solve problems affecting the biocompatibility of bacterial cellulose and silk protein composite materials, hidden dangers of biological material safety performance, and affecting the environmental protection and safety performance of materials, and achieve mechanical Effects of improved performance, increased breaking strength, and good load transfer

Inactive Publication Date: 2021-07-20
YANCHENG INST OF IND TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the materials prepared by bacterial cellulose and silk protein at present all contain chemical cross-linking agents. The presence of chemical cross-linking agents will definitely affect the biocompatibility of bacterial cellulose and silk protein composite materials, and cause serious damage to the safety performance of biological materials. Hidden dangers, affecting the environmental protection and safety performance of materials

Method used

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  • Fibroin oxidized bacterial cellulose nano-composite membrane and preparation method thereof
  • Fibroin oxidized bacterial cellulose nano-composite membrane and preparation method thereof
  • Fibroin oxidized bacterial cellulose nano-composite membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A preparation method of silk protein oxidized bacterial cellulose nanocomposite film, comprising the following steps:

[0034] S1. Preparation of silk fibroin / nano-silver colloidal solution: Add silver nitrate to the regenerated silk fibroin aqueous solution with a concentration of 2wt%, the solid-liquid ratio of silver nitrate and regenerated silk fibroin aqueous solution is 4mg: 1mL, mix and stir evenly to obtain Silk fibroin / silver nitrate mixed solution, and then irradiate the mixed solution to 200w. hr / m 2 , UV irradiation with a wavelength of 300nm and stirring to form a silk fibroin / nano-silver colloidal solution;

[0035] S2. Preparation of oxidized bacterial cellulose: Pretreat the bacterial cellulose to obtain a bacterial cellulose homogenate with a concentration of 0.1 wt%, and then add a mixed oxidation system of TEMPO / NaBr / NaClO to the bacterial cellulose homogenate, the bacteria Cellulose, TEMPO, the mass ratio of sodium bromide and sodium hypochlorite a...

Embodiment 2

[0038] A preparation method of silk protein oxidized bacterial cellulose nanocomposite film, comprising the following steps:

[0039] S1. Preparation of silk fibroin / nano-silver colloidal solution: Add silver nitrate to the regenerated silk fibroin aqueous solution with a concentration of 2wt%, the solid-liquid ratio of silver nitrate and regenerated silk fibroin aqueous solution is 4mg: 1mL, mix and stir evenly to obtain Silk fibroin / silver nitrate mixed solution, and then irradiate the mixed solution to 200w. hr / m 2 , UV irradiation with a wavelength of 300nm and stirring to form a silk fibroin / nano-silver colloidal solution;

[0040] S2. Preparation of oxidized bacterial cellulose: pretreat the bacterial cellulose to obtain a bacterial cellulose homogenate with a concentration of 0.15 wt%, and then add a mixed oxidation system of TEMPO / NaBr / NaClO to the bacterial cellulose homogenate, the bacteria Cellulose, TEMPO, the mass ratio of sodium bromide and sodium hypochlorite ...

Embodiment 3

[0043] A preparation method of silk protein oxidized bacterial cellulose nanocomposite film, comprising the following steps:

[0044] S1. Preparation of silk fibroin / nano-silver colloidal solution: Add silver nitrate to the regenerated silk fibroin aqueous solution with a concentration of 2wt%, the solid-liquid ratio of silver nitrate and regenerated silk fibroin aqueous solution is 4mg: 1mL, mix and stir evenly to obtain Silk fibroin / silver nitrate mixed solution, and then irradiate the mixed solution to 300w. hr / m 2 , UV irradiation with a wavelength of 250nm and stirring to form a silk fibroin / nano-silver colloidal solution;

[0045] S2. Preparation of oxidized bacterial cellulose: Pretreat the bacterial cellulose to obtain a bacterial cellulose homogenate with a concentration of 0.1 wt%, and then add a mixed oxidation system of TEMPO / NaBr / NaClO to the bacterial cellulose homogenate, the bacteria Cellulose, TEMPO, the mass ratio of sodium bromide and sodium hypochlorite a...

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Abstract

The invention provides a fibroin oxidized bacterial cellulose nano composite membrane and a preparation method thereof. The fibroin oxidized bacterial cellulose nano composite membrane comprises silk fibroin, nano silver, polyvinyl alcohol and oxidized bacterial cellulose, the fibroin oxidized bacterial cellulose contains a three-dimensional network structure, the three-dimensional network structure is a network structure formed by bacterial cellulose, the nano-silver is attached to the three-dimensional network structure formed by the oxidized bacterial cellulose, and the composite film is formed by casting. The prepared film can be applied to the fields of storage packaging materials and biomedical materials, and the preparation method is simple, mild in condition, convenient to operate, easy to control, free of cross-linking agents and suitable for quantitative production.

Description

technical field [0001] The invention relates to the technical field of textile materials, in particular to a silk protein oxidized bacterial cellulose nanocomposite membrane and a preparation method thereof. Background technique [0002] Today, with increasing attention to environmental issues, in order to reduce or even replace traditional petroleum-based composite materials, the use of renewable resources to develop multifunctional biomimetic nanocomposites has gradually become a research hotspot. As a regenerated natural protein extracted from silkworm cocoons, silk fibroin has good physical, chemical, biological and optical properties, and has been processed into different forms such as films, nanofibers, gels, 3D materials, particles and microneedles. It is used in the fields of biology, medicine, electronics, optics and filtration, etc. However, pure silk fibroin film is hard and brittle when dry, and it is easy to break, which limits its wide application. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L89/00C08L29/04C08L1/04C08K3/08
CPCC08J5/18C08J2329/04C08J2389/00C08J2401/04C08J2429/04C08J2489/00C08K2003/0806C08K2201/011
Inventor 王可王曙东马倩
Owner YANCHENG INST OF IND TECH
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