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Bacterial cellulose porous foam material and preparation method thereof

A technology of bacterial cellulose and bacterial cellulose membrane is applied in the field of bacterial cellulose porous foam material and its preparation, and achieves the effects of regular pores, regular arrangement and large water absorption

Inactive Publication Date: 2012-08-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that the AC foaming agent can decompose and release a large amount of gas under the condition of alkaline NaOH solution, but the method is still to add the AC foaming agent to the unformed dispersion raw material and mix it before foaming, so it needs Utilizing a new preparation process, the AC foaming agent is uniformly dispersed into the molded bacterial cellulose membrane to form a porous foam material

Method used

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  • Bacterial cellulose porous foam material and preparation method thereof
  • Bacterial cellulose porous foam material and preparation method thereof
  • Bacterial cellulose porous foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Pretreatment: first wash the bacterial cellulose membrane several times with deionized water until the pH value of the bacterial cellulose membrane is neutral, and then soak the bacterial cellulose membrane in a NaOH alkaline solution with a mass concentration of 1%. Middle 24h, take out the bacterial cellulose membrane and set aside;

[0031] (2) Preparation of foaming solution: add AC foaming agent, NaOH and deionized water into the reaction vessel, the mass ratio is 3:1:100, stir and dissolve until it becomes a transparent yellow solution, that is, it is prepared into a foaming solution solution;

[0032] (3) Soak the pretreatment membrane: soak the bacterial cellulose membrane treated in step (1) in the foaming solution, and keep stirring for 3 hours;

[0033] (4) Preparation of polyvinyl alcohol solution: Weigh a certain mass of polyvinyl alcohol solid, and its mass ratio to AC foaming agent is 2:1, place it in deionized water and heat it to 80°C until it is com...

Embodiment 2

[0037] (1) Pretreatment: first wash the bacterial cellulose membrane several times with deionized water until the pH value of the bacterial cellulose membrane is neutral, and then soak the bacterial cellulose membrane in a NaOH alkaline solution with a mass concentration of 1%. Middle 24h, take out the bacterial cellulose membrane and set aside;

[0038] (2) prepare foaming solution: add AC foaming agent, NaOH and deionized water in reaction vessel, its mass ratio is 3: 1: 100, add surfactant Tween-80 simultaneously, it and AC foaming agent The mass ratio of the solution is 1:10, stir and dissolve until it turns into a transparent yellow solution, that is, it is prepared into a foaming solution;

[0039] (3) Soak the pretreatment membrane: soak the bacterial cellulose membrane treated in step (1) in the foaming solution, and keep stirring for 3 hours;

[0040] (4) Preparation of polyvinyl alcohol solution: Weigh a certain mass of polyvinyl alcohol solid, and its mass ratio to...

Embodiment 3

[0044] (1) Pretreatment: first wash the bacterial cellulose membrane several times with deionized water until the pH value of the bacterial cellulose membrane is neutral, and then soak the bacterial cellulose membrane in a NaOH alkaline solution with a mass concentration of 1%. Middle 24h, take out the bacterial cellulose membrane and set aside;

[0045] (2) Prepare foaming solution: add AC foaming agent, NaOH and deionized water in the reaction vessel, its mass ratio is 3: 1: 100, add surfactant Span-80 simultaneously, it and AC foaming agent The mass ratio of the solution is 1:10, stir and dissolve until it turns into a transparent yellow solution, that is, it is prepared into a foaming solution;

[0046] (3) Soak the pretreatment membrane: soak the bacterial cellulose membrane treated in step (1) in the foaming solution, and keep stirring for 3 hours;

[0047] (4) Preparation of polyvinyl alcohol solution: Weigh a certain mass of polyvinyl alcohol solid, and its mass ratio...

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Abstract

The invention relates to a bacterial cellulose porous foam material and a preparation method thereof, and in particular relates to a foam material used for preparing a moulded bacterial cellulose membrane by utilizing azodicarbonamide (AC foaming agent) and a preparation method thereof. In the bacterial cellulose porous foam material provided by the invention, internal structure of the bacterial cellulose membrane is shown as ellipse holes, the holes are interpenetrated, and hole diameter is 5-10 mu m. The preparation method of the bacterial cellulose porous foam material provided by the invention comprises the following steps of: preparing foaming solution by taking azodicarbonamide as a foaming agent and adding a surfactant and a foam stabilizer, fully soaking the moulded bacterial cellulose membrane into the foaming solution and then heating and foaming so as to prepare the bacterial cellulose porous foam material. In the process, the AC foaming agent is effectively introduced intothe moulded bacterial cellulose membrane, decomposition temperature of the AC foaming agent is appropriate, a technological process is simple, preparation period is short, and the original chemical structure of the bacterial cellulose is not damaged, thus the bacterial cellulose porous foam material can be applied to multiple industrial fields.

Description

technical field [0001] The invention relates to a bacterial cellulose porous foam material and a preparation method thereof, in particular to a foam material for preparing a molded bacterial cellulose membrane by using azodicarbonamide (AC foaming agent) and a preparation method thereof. Background technique [0002] Bacterial cellulose is a filamentous fiber secreted by bacteria to the outside of the cell. It is formed by the condensation of simple glucose and forms a randomly ordered network structure. The diameter of the fiber is about 10-100 nm, and the width between the fibers is about It is 70-80nm. Therefore, bacterial cellulose has many excellent physical and chemical properties as nano-scale biological cellulose. Such as unique three-dimensional network structure, nano-scale fiber size, super high water absorption performance, good mechanical properties and excellent biocompatibility, etc., making bacterial fibers widely used in functional materials, nano-hybrid ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08J9/10C08J7/00
Inventor 尹娜王华平陈仕艳洪枫李喆欧阳炀王宝春汤廉
Owner DONGHUA UNIV
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