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Preparation method and product of nanocellulose crystal/polyaniline composite material

A technology of nanocellulose and composite materials, which is applied in the field of in-situ preparation of nanocellulose crystals/polyaniline composite materials, can solve the problems of poor experimental repeatability, harsh experimental conditions, and restrictions on the wide application of composite materials. Achieve the effect of simple operation, low production cost and renewable cost

Inactive Publication Date: 2011-12-28
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, cellulose liquid crystal / polyaniline composite materials have achieved certain results, but at the same time, they also face some problems, such as poor experimental repeatability and harsh experimental conditions, which limit the wide application of composite materials to a certain extent.

Method used

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  • Preparation method and product of nanocellulose crystal/polyaniline composite material
  • Preparation method and product of nanocellulose crystal/polyaniline composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Preparation of cellulose lyotropic cholesteric liquid crystal: Weigh 10 g of microcrystalline cellulose, measure 175 ml of 64% concentrated sulfuric acid, stir and react at 45°C for 3 hours, add a large amount of distilled water, dilute and reduce the suspension temperature to terminate the reaction; then centrifuge the obtained mixed solution with a centrifuge, discard the supernatant, and wash the lower layer of turbid liquid with distilled water, then centrifuge again and discard the supernatant, this step is repeated 1-6 times to obtain nanofibers then carry out dialysis to remove excess acid in the suspension, so that the solution outside the dialysis bag is neutral; then evaporate and concentrate the dialysis suspension under natural conditions, and when the concentration reaches the critical concentration, cellulose bile Steroidal liquid crystal.

[0023] (2) Preparation of nanocellulose crystal / polyaniline composite material: In this example, the conjugated ...

Embodiment 2

[0025] The acid used in step (1) is 2.5M hydrochloric acid, after reacting for 30min-3h, then post-treat with 64% concentrated sulfuric acid. In step (2), the aniline / HCl solution is firstly added to the cellulose cholesteric liquid crystal suspension, and then the obtained mixed solution is added to the APS / HCl. All the other steps are the same as in Example 1.

Embodiment 3

[0027] In the step (1), the sulfuric acid hydrolysis reaction temperature is 75° C., and the reaction time is 30 minutes. The method of concentration is osmotic compression. Used the 5.8g / L cellulose cholesteric liquid crystal suspension of 50ml in the step (2), all the other steps are with embodiment 1.

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Abstract

The invention discloses a method for preparing nano-cellulose crystal / polyaniline composite material and a product thereof. In the method, firstly, the cellulose is hydrolyzed by acid to obtain nano-cellulose crystals, and the suspension of the nano-cellulose crystals spontaneously forms lyotropic cholesteric liquid crystals at a certain concentration. Then, the nanocellulose crystal / polyaniline composite material product with reversible redox properties is prepared by in-situ polymerization reaction of the polyaniline conductive monomer in the nanocellulose crystal cholesteric liquid crystal. The invention has the advantages of low cost, simple synthesis method, high production efficiency and the like.

Description

technical field [0001] The invention belongs to the field of nano-cellulose crystal / polyaniline composite materials, in particular to a method for preparing nano-cellulose crystal / polyaniline composite materials in situ in a lyotropic cholesteric liquid crystal reaction field of nano-cellulose crystals and the method thereof. product. Background technique [0002] In 1977, Hideki Shirakawa, MacDiarmid and Heeger reported that doped polyacetylene was conductive, and its conductivity was comparable to that of metal copper. This discovery broke the traditional concept that polymers are only insulators. Since then Conductive polymers have been extensively studied. After decades of development, conjugated polymers with good chemical stability have come out one after another, such as polyparastyrene, polythiophene, polyparaphenylene, polypyrrole, polyaniline, etc. However, conductive polymers are insoluble and infusible, which makes them difficult to process and limits their app...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L79/02C08G73/02C09K19/38
Inventor 朴光哲张丽红张大为
Owner QINGDAO UNIV OF SCI & TECH
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