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Magnetic bacterial cellulose membrane with lyophobic performance and its preparation method

A technology of bacterial cellulose membrane and magnetic bacteria is applied in the field of magnetic bacterial cellulose membrane with amphiphobic properties and its preparation, which can solve the problems of difficult to prepare nano-level composite structure, complex preparation method, difficult process control, etc. Good self-cleaning effect, simple production process, long-lasting effect

Inactive Publication Date: 2012-02-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are difficult to prepare nano-scale composite structures, and the preparation methods are relatively complicated and the process is difficult to control.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Immerse bacterial cellulose produced by Acetobacter xylinum at room temperature and under nitrogen protection at a concentration of 0.0003mol L -1 FeCl 2 and FeCl 3 Compound mixed solution for 3 hours, in which FeCl 2 and FeCl 3 Molar ratio = 1:1;

[0038] 2. The bacterial cellulose membrane obtained in step 1 is washed and rinsed repeatedly with deionized water to remove iron ions that are not attached to the surface;

[0039] 3. Immerse the bacterial cellulose membrane obtained in step 2 into 0.01mol L at 30°C under the protection of nitrogen -1 React in NaOH solution for 10 minutes;

[0040] 4. Take out the bacterial cellulose membrane obtained in step 3, rinse it repeatedly with deionized water, and adjust the pH value of the membrane to 6-7, thereby obtaining nano-Fe-containing 3 o 4 Bacterial cellulose wet film of particles;

[0041] 5. the nanometer Fe that step 4 obtains 3 o 4 The bacterial cellulose wet film of the particles is freeze-dried to obta...

Embodiment 2

[0044] 1. Immerse bacterial cellulose produced by Acetobacter acetibacterium at room temperature and under nitrogen protection at a concentration of 3mol L -1 FeSO 4 and Fe 2 (SO 4 ) 3 24 hours in the mixed solution in which FeSO 4 compound and Fe 2 (SO 4 ) 3 The molar ratio of = 1: 2;

[0045] 2. The bacterial cellulose membrane obtained in step 1 is repeatedly rinsed with deionized water to remove iron ions that are not attached to the surface;

[0046] 3. Immerse the bacterial cellulose membrane obtained in step 2 into 100mol L at 80°C under the protection of nitrogen -1 React in KOH solution for 60 minutes;

[0047] 4. Take out the bacterial cellulose membrane obtained in step 3, rinse it repeatedly with deionized water, and adjust the pH value of the membrane to 6-7, thereby obtaining nano-Fe-containing 3 o 4 Bacterial cellulose wet film of particles;

[0048] 5. the nanometer Fe that step 4 obtains 3 o 4 The bacterial cellulose wet film of the particles is ...

Embodiment 3

[0051]1. Immerse bacterial cellulose produced by Acetobacter xylinum at room temperature under nitrogen protection at a concentration of 1mol L -1 FeCl 2 and FeCl 3 8 hours in the mixed solution of the compound, in which FeCl 2 and FeCl 3 Molar ratio = 1:1;

[0052] 2. The bacterial cellulose membrane obtained in step 1 is repeatedly rinsed with deionized water to remove iron ions that are not attached to the surface;

[0053] 3. Immerse the bacterial cellulose membrane obtained in step 2 in 0.2mol L at 40°C under the protection of nitrogen -1 React in KOH solution for 20 minutes;

[0054] 4. Take out the bacterial cellulose membrane obtained in step 3, rinse it repeatedly with deionized water, and adjust the pH value of the membrane to 6-7, thereby obtaining nano-Fe-containing 3 o 4 Bacterial cellulose wet film of particles;

[0055] 5. the nanometer Fe that step 4 obtains 3 o 4 The bacterial cellulose wet film of the particles is freeze-dried to obtain a magnetic b...

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PUM

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Abstract

The invention belongs to the functional material field, relates to a magnetic bacterial cellulose membrane with lyophobic performance and its preparation method; especially relates to a magnetic bacterial cellulose membrane with 130-160 DEG of apparent contact angle and lyophobic performance; concretely relates to a magnetic bacterial cellulose membrane with lyophobic performance and the surface roughness of the bacterial cellulose membrane microfiber increased by the ferroferric oxide nano particles and its preparation method. The method comprises the following steps: attaching the ferroferric oxide nano particles to the bacterial cellulose membrane through an in-situ composite method; then generating a lyophobic monolayer membrane through a lyophobic reagent by a self-assembly technology to reach the lyophobic effect. Therefore, the bacterial cellulose membrane with lyophobic performance and permanent magnetism can be prepared by the method.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a magnetic bacterial cellulose film with amphiphobic properties and a preparation method thereof, in particular to a magnetic bacterial cellulose film with amphiphobic properties and an apparent contact angle of 130-160° The invention relates to a preparation method thereof, specifically a magnetic bacterial cellulose membrane with amphiphobic properties that increases the surface roughness of microfibrils of the bacterial cellulose membrane through iron ferric oxide nanoparticles and a preparation method thereof. Background technique [0002] In recent years, with the development of modern science and technology, magnetic composite materials are not limited to their original use. Magnetic nanoparticles have the small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect of nanoparticles, which make the composite materials more versatile. Elec...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/04C08L1/02C08K3/22C01G49/08B82Y40/00B32B23/08
Inventor 张雯汤廉胡伟立周碧辉郑羿陈仕艳王华平
Owner DONGHUA UNIV
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