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Bacterial cellulose membrane composite material having nanometer cobweb structure and preparation method thereof

A bacterial cellulose membrane and bacterial cellulose technology are applied in the field of bacterial cellulose membrane composite materials and their preparation, which can solve the problems of complex preparation process of nanofibers, inability of nanofibers to effectively block particles that can enter the lungs and harmful bacteria, and the like. Good promotion value, air permeability, light weight, high strength, good air permeability

Active Publication Date: 2018-04-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the preparation process of nanofibers in the prior art is complicated and the prepared nanofibers cannot effectively block the particulate matter and harmful bacteria in the air, and provide a simple and convenient industrial production prospect. And the preparation method of the bacterial cellulose film composite material that can effectively block the particulate matter that can enter the lungs and harmful bacteria in the air

Method used

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  • Bacterial cellulose membrane composite material having nanometer cobweb structure and preparation method thereof
  • Bacterial cellulose membrane composite material having nanometer cobweb structure and preparation method thereof
  • Bacterial cellulose membrane composite material having nanometer cobweb structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0045] A kind of preparation method of the bacterial cellulose film composite material with nano spider web structure, the steps are as follows:

[0046] (1) Sterilize the non-woven fabric: cut the non-woven fabric with a hydrophilic surface into the required size, and spread it in the culture container after high-pressure steam sterilization, wherein the non-woven fabric with a hydrophilic surface is made of The non-woven fabric is made by surface hydrophilic treatment. The surface hydrophilic treatment refers to the grafting of negatively charged hydrophilic groups on the surface of the non-woven fabric made of PP material with an average diameter of 30 μm. The surface of the non-woven fabric is hydrophilic. The thickness of the cloth is 0.1mm, and the surface density is 20g / m 2 , the surface static water contact angle is 70°;

[0047] (2) Preparation of fermentation broth: by mass percentage, the unit is wt%. Each component and its content in the fermentation broth are as ...

Embodiment 2

[0055] A kind of preparation method of the bacterial cellulose film composite material with nano spider web structure, the steps are as follows:

[0056] (1) Sterilize the non-woven fabric: cut the non-woven fabric with a hydrophilic surface into the required size, and spread it in the culture container after being sterilized by ultraviolet radiation. Among them, the non-woven fabric with a hydrophilic surface It is made of non-woven fabric through surface hydrophilic treatment. Surface hydrophilic treatment refers to grafting negatively charged hydrophilic groups on the surface of non-woven fabric made of PET material with an average diameter of 50 μm. The surface is hydrophilic. The thickness of the non-woven fabric is 0.2mm, and the surface density is 30g / m 2 , the surface static water contact angle is 69°;

[0057] (2) Preparation of fermentation broth: by mass percentage, the unit is wt%. In the fermentation broth, each component and its content are as follows: 3 sucrose...

Embodiment 3

[0065] A kind of preparation method of the bacterial cellulose film composite material with nano spider web structure, the steps are as follows:

[0066] (1) Sterilize the non-woven fabric: cut the non-woven fabric with a hydrophilic surface into the required size, and spread it in the culture container after being sterilized with ethylene oxide. The non-woven fabric with a hydrophilic surface is It is made of non-woven fabric through surface hydrophilic treatment. Surface hydrophilic treatment refers to grafting negatively charged hydrophilic groups on the surface of non-woven fabric made of PA material with an average diameter of 40 μm. The thickness of the woven fabric is 0.3mm, and the surface density is 18g / m 2 , the surface static water contact angle is 62°;

[0067] (2) Preparation of fermentation broth: by mass percentage, the unit is wt%. Each component and its content in the fermentation broth are as follows: glucose 2, peptone 0.5, yeast extract 0.08, citric acid 0...

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Abstract

The invention relates to a bacterial cellulose membrane composite material having a nanometer cobweb structure and a preparation method thereof. The preparation method comprises: dispersing bacterialstrains with the isoelectric point in a range of 3.5-4.0 in a bacterial strain nutrient solution with the pH value in a range of 4.5-5.0 to obtain a culture bacteria liquid with the bacterial strain cell density being 10<9>-10<12> per mL; and adding the culture bacteria liquid drop by drop on the non-woven fabric with the surface static water contact angle no more than 70 degrees, and performing standing culture to obtain the composite material. Two adjacent layers of the composite material are a bacterial cellulose membrane and a surface-hydrophilic non-woven fabric, respectively. The bacterial cellulose membrane mainly comprises trunk bacterial cellulose fibers and branched bacterial cellulose fibers, wherein the trunk bacterial cellulose fibers crosslink to each other to form a three-dimensional pore structure, which forms a bacterial cellulose membrane skeleton, and the branched bacterial cellulose fibers form webs among the bacterial cellulose fibers. The method is simple and easyto operate. The prepared composite material is good in biological compatibility and permeability, light in weight and high in strength.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a bacterial cellulose membrane composite material with a nano spider web structure and a preparation method thereof. Background technique [0002] Due to the rapid development of industry and the destruction of the natural environment by humans, air pollution has become increasingly serious. In recent years, many provinces in my country have experienced continuous foggy weather, which seriously affects people's breathing and lung health. The main "culprit of haze" is fine particulate matter (PM2.5) with a particle size of less than 2.5 μm in the air, also known as particulate matter that can enter the lungs. On the other hand, various diseases transmitted through the respiratory tract also threaten human health, such as influenza and bird flu. It is precisely because of the aggravation of air pollution and the outbreak of infectious diseases that it is particularly...

Claims

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Application Information

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IPC IPC(8): D06N3/00C12P39/00C12P19/04C12R1/02C12R1/41C12R1/38C12R1/01
CPCC12P19/04C12P39/00D06N3/0011D06N2203/026D06N2209/123D06N2209/165D06N2211/30D06N2213/02
Inventor 陈仕艳陈燕李喆王华平盛楠魏佳欣李文颖
Owner DONGHUA UNIV
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