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Method for preparing metal nanoparticle composite bacterial cellulose and products thereof

A metal nanoparticle, bacterial cellulose technology, applied in microorganism-based methods, biochemical equipment and methods, fiber processing and other directions, can solve the problems of complex preparation process routes, difficult to scale production, etc., and achieves controllable preparation technology, Achieve controllable preparation and avoid the use of reducing agents

Active Publication Date: 2010-06-16
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process route is relatively complicated, and it is not easy to produce on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Bacterial cellulose membrane is prepared by Acetobacter xylinum, cut 3×3cm with scissors 2 The purified bacterial cellulose membrane was separated and soaked in 0.01mol / L silver nitrate solution for 5min.

[0030] (2) Transfer the bacterial cellulose membrane and the silver nitrate solution into an autoclave, and treat for 10 minutes at a temperature of 121° C. and a pressure of 0.205 MPa under high temperature and high pressure.

[0031] (3) Wash the processed composite membrane with distilled water for 10 minutes until silver metal ions no longer appear in the distilled water after washing; the composite membrane after cleaning can be dried naturally to obtain the bacterial cellulose three-dimensional porous network structure Metal nanoparticles composite bacterial cellulose membrane with 0.05wt% silver metal nanoparticles attached in it. The prepared silver nano-particles are in cubic crystal form, mostly spherical and / or polyhedral in particle shape, and have a...

Embodiment 2

[0033] (1) Bacterial cellulose membrane is prepared by Acetobacter pasteurianus, cut 3×3cm with scissors 2 The purified bacterial cellulose membrane was separated and soaked in 0.1mol / L silver nitrate solution for 10min.

[0034] (2) Transfer the bacterial cellulose membrane and the silver nitrate solution into an autoclave, and treat it at a temperature of 135° C. and a pressure of 0.313 MPa under high temperature and high pressure for 20 minutes.

[0035] (3) Wash the treated composite membrane with distilled water for 20 minutes until silver metal ions no longer appear in the distilled water after washing; the composite membrane after cleaning is removed by mechanical pressing to obtain a three-dimensional porous network of bacterial cellulose Metal nanoparticle composite bacterial cellulose membrane with 1 wt% silver metal nanoparticles attached in the structure. The prepared silver nano-particles are in the cubic crystal form, the morphology of the particles is mostly sp...

Embodiment 3

[0037] (1) Bacterial cellulose membrane is prepared by Acetobacter, cut 3×3cm with scissors 2 The purified bacterial cellulose membrane was separated and soaked in 0.0001mol / L silver nitrate solution for 2 minutes.

[0038] (2) Transfer the bacterial cellulose membrane and the silver nitrate solution into an autoclave, and treat it under high temperature and high pressure at a temperature of 150° C. and a pressure of 0.476 MPa for 5 minutes.

[0039] (3) Wash the treated composite membrane with distilled water for 10 minutes until silver metal ions no longer appear in the distilled water after washing; the composite membrane after cleaning is vacuum-dried to obtain the bacterial cellulose three-dimensional porous network structure Metal nanoparticles composite bacterial cellulose membrane with 0.01wt% silver metal nanoparticles attached in it. The prepared silver nano-particles are in cubic crystal form, and the morphology of the particles is mostly spherical and / or polyhedra...

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Abstract

The invention particularly relates to a method for preparing metal nanoparticle composite bacterial cellulose and products thereof, and belongs to the composite field of metallic nanomaterials and biopolymer materials. The method comprises the following steps: soaking the bacterial cellulose into solution of metal precursor; then, heating the solution in a high-pressure vessel to 121 to 150 DEG C, pressurizing the solution to 0.205 and 0.476MPa, and standing the solution for 5 to 30 minutes; and taking the treated bacterial cellulose out for washing and drying to obtain the metal nanoparticle composite bacterial cellulose attached with 0.01 to 10 weight percent of metal nanoparticles in a bacterial cellulose three-dimensional porous network structure, which is compounded by the metal nanoparticles and the bacterial cellulose. The method has simple and easy preparation process, convenient operation, controllable preparation technology, no pollution and low cost; the prepared nanoparticles have high purity, small diameter of nanoparticles, uniform size and good dispersibility; and the method realizes controllable preparation of sizes and distribution of the nanoparticles by simply changing experiment conditions, and has wide application value in the field of industrialized production.

Description

technical field [0001] The invention relates to a method for preparing metal nanoparticle composite bacterial cellulose and its products, belonging to the composite field of metal nanomaterials and biopolymer materials, in particular to a method for preparing gold, silver, platinum or palladium metal using bacterial cellulose as a carrier A method for compounding bacterial cellulose with nanoparticles and a product thereof. Background technique [0002] In recent years, noble metals have shown potential application value in many fields due to their unique optical, electrical, catalytic and chemical properties. In particular, noble metal nanoparticles have a wide range of applications in optical, electrical, magnetic materials, microprocessors, controlled drug release, catalysts, biomarkers, and environmental protection. The compounding of noble metal nanoparticles and polymer materials can improve the dispersion of nanoparticles, obtain evenly dispersed noble metal nanomate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83C12P19/04C12R1/02C12R1/01C12R1/41C12R1/38
Inventor 李喆钟春燕陈仕艳王华平王彪
Owner DONGHUA UNIV
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