Cellulose-based three-dimensional porous composite material supporting nano-zinc oxide

A nano-zinc oxide and composite material technology is applied in the field of cellulose-based three-dimensional porous composite materials to achieve the effects of low density, strong adsorption capacity and large specific surface area

Inactive Publication Date: 2018-01-19
赵兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no public reports on the use of cellulose / KGM / β-cyclodextrin composites as carriers to support nano-zinc oxide.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) After cutting the cotton into pieces, disperse it in deionized water with a bath ratio of 1:50, then add β-cyclodextrin, wherein the mass ratio of β-cyclodextrin and cotton is 1:1, mix and stir evenly, Add 20g / L sodium periodate, react in the dark at 50°C for 300min, wash repeatedly with deionized water, and dry to obtain a cotton-β-cyclodextrin composite material. (2) Disperse konjac flour in deionized water at room temperature, bath ratio 1:50, add glutaraldehyde, wherein the volume ratio of glutaraldehyde to konjac flour aqueous solution is 1:10, mix well, then slowly add 50g / L polyamide-amine PAMAM aqueous solution, wherein the volume ratio of PAMAM aqueous solution and konjac flour aqueous solution is 1:1, after reacting for 24h, repeatedly washing with distilled water and ethanol, drying to obtain PAMAM modified konjac. (3) By weight percentage, 50% cotton-β-cyclodextrin composite material, 49% PAMAM modified konjac, and 1% sodium lauryl sulfate were disperse...

Embodiment 2

[0017] (1) Shred the viscose fabric, disperse it in deionized water, bath ratio 1:50, then add β-cyclodextrin, wherein the mass ratio of β-cyclodextrin and viscose is 1:2, mix and stir After uniformity, add 50g / L sodium periodate, react in the dark at 80°C for 100min, wash repeatedly with deionized water, and dry to obtain the viscose-β-cyclodextrin composite material. (2) Disperse konjac flour in deionized water at room temperature, bath ratio 1:50, add glutaraldehyde, wherein the volume ratio of glutaraldehyde to konjac flour aqueous solution is 1:10, mix well, then slowly add 10g / L polyamide-amine PAMAM aqueous solution, wherein the volume ratio of PAMAM aqueous solution and konjac flour aqueous solution is 1:6, after reacting for 24h, repeatedly washing with distilled water and ethanol, drying to obtain PAMAM modified konjac. (3) In terms of weight percentage, 49% viscose-β-cyclodextrin composite material, 49% PAMAM modified konjac, and 2% cetyltrimethylammonium bromide wer...

Embodiment 3

[0019] (1) Cut the straw into pieces and disperse it in deionized water with a liquor ratio of 1:50, then add β-cyclodextrin, wherein the mass ratio of β-cyclodextrin to straw is 2:1, mix well, Add 100g / L sodium periodate, react in the dark at 80°C for 60min, wash repeatedly with deionized water, and dry to obtain a straw-β-cyclodextrin composite material. (2) Disperse konjac flour in deionized water at room temperature, bath ratio 1:50, add glutaraldehyde, wherein the volume ratio of glutaraldehyde to konjac flour aqueous solution is 1:10, mix well, then slowly add 100g / L polyamide-amine PAMAM aqueous solution, wherein the volume ratio of PAMAM aqueous solution and konjac flour aqueous solution is 1:10, after reacting for 24h, repeatedly washing with distilled water and ethanol, drying to obtain PAMAM modified konjac. (3) In terms of weight percentage, 45% straw-β-cyclodextrin composite material, 50% PAMAM modified konjac, and 5% polyethylene glycol were dispersed in deioniz...

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PUM

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Abstract

The invention discloses a cellulose-based three-dimensional porous composite material supporting nano-zinc oxide and a preparation method thereof. The preparation method includes the steps of: 1) according to weight percentage ratio, successively dispersing 40-60% of a cellulose-[beta]-cyclodextrin composite material, 40-60% of PAMAM-modified konjac, and 1-5% of a pore-forming agent in deionized water, bath ratio being 1:50, performing ultrasonic mixing to uniform, and performing stirring reaction at normal temperature for 24 h at constant speed; 2) pouring a reaction product into a mould, placing the mould in liquid nitrogen for 1 min, taking the mould out, pre-freezing the reaction product in a refrigerator for 6 h at -20 DEG C, freezing the reaction product in a Thermo ultra-low temperature refrigerator for 6 h at -80 DEG C, and processing the reaction product in a freeze-drying machine for 48 h to obtain the cellulose/konjac/cyclodextrin three-dimensional porous composite material;and 3) with electrostatic effect as film forming driving force, performing layer by layer self-assembly on the surface of the three-dimensional porous composite material with the nano-zinc oxide. Inthe invention, with the konjac, cellulose, beta-cyclodextrin and zinc oxide as the raw materials, the method has sufficient raw materials and low cost. The material has important application value inthe fields such as photocatalysis, photoelectric materials, adsorption materials, biomaterials, etc.

Description

technical field [0001] The invention relates to a cellulose-based three-dimensional porous composite material loaded with nanometer zinc oxide, which belongs to the field of nanocomposite materials. Background technique [0002] For a long time, cellulose has been the main industrial raw material for textile and papermaking. It has been paid more and more attention by people because of its renewability, biodegradability and cost advantages. , Functional chemicals and additives have shown good development prospects. Due to the reduction of arable land and the depletion of fossil resources such as oil and natural gas, the production of synthetic fibers will be more and more restricted. As a green, environmentally friendly and renewable resource, cellulose has gained an unprecedented opportunity for development. [0003] Konjac glucomannan (KGM for short) is a relatively abundant renewable natural polymer resource after starch and cellulose. It is biodegradable, and its hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/16C08L1/02C08L5/00C08L77/00C08L1/24C08L97/02C08J9/28C08J9/40C08J9/42
Inventor 赵兵
Owner 赵兵
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