Preparation method of nano-cellulose-base porous composite material

A technology of nanocellulose and composite materials, which is applied in the field of preparation of nanocellulose-based porous composite materials, can solve problems such as poor biocompatibility, and achieve good biocompatibility and good UV protection effects

Inactive Publication Date: 2019-06-28
赵文斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Technical problem to be solved by the present invention: Aiming at the problem of poor biocompatibility

Method used

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  • Preparation method of nano-cellulose-base porous composite material

Examples

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Effect test

example 1

[0040] Add acetate-esterified nanocellulose, acetic acid, and graphene to the chitosan solution, stir at a high speed of 1500r / min at room temperature for 1 hour, and then ultrasonically disperse for 20 minutes to obtain a mixed dispersion; add agar solution and epichlorohydrin Put the mixed dispersion in the water bath at 80°C and stir for 30 minutes at a speed of 500r / min to obtain the mixed reaction solution; pour the mixed reaction solution into a crystallization dish and freeze it in a freezer for 20 hours to obtain a frozen solid; according to the mass ratio The frozen solid was thawed at 1:50 and then soaked in anhydrous B to solidify for 22 hours to obtain the solidified material; according to the mass ratio of 1:40, the solidified material was soaked in deionized water for 2 days, washed with absolute ethanol three times, and freeze-dried to obtain Nanocellulose-based porous composites. Acetate nanocellulose, acetic acid, graphene, the parts by weight of chitosan solu...

example 2

[0042] Add acetate-esterified nanocellulose, acetic acid, and graphene into the chitosan solution, stir at a high speed of 1750r / min for 1.2h at room temperature, and then ultrasonically disperse for 25min to obtain a mixed dispersion; add agar solution, epichlorohydrin Add it to the mixed dispersion liquid, place it in a water bath at 82°C and stir at a speed of 550r / min for 35 minutes to obtain a mixed reaction liquid; pour the mixed reaction liquid into a crystallization dish, freeze it in a freezer for 22 hours, and obtain a frozen solid; The frozen solid was thawed at a ratio of 1:50 and then soaked in anhydrous B to solidify for 23 hours to obtain a solidified material; the solidified material was soaked in deionized water for 2 days at a mass ratio of 1:40, washed 4 times with absolute ethanol, and freeze-dried. Nanocellulose-based porous composites were obtained. Acetate nanocellulose, acetic acid, graphene, the parts by weight of chitosan solution are 25 parts of acet...

example 3

[0044] Add acetic acid esterified nanocellulose, acetic acid, and graphene into the chitosan solution, stir at a high speed of 2000r / min for 1.5h at room temperature, and then ultrasonically disperse for 30min to obtain a mixed dispersion; add agar solution, epichlorohydrin Add it to the mixed dispersion liquid, place it in a water bath at 85°C and stir at a speed of 600r / min for 40 minutes to obtain a mixed reaction liquid; pour the mixed reaction liquid into a crystallization dish, freeze it in a freezer for 24 hours, and obtain a frozen solid; The frozen solid was thawed at a ratio of 1:50 and then soaked in anhydrous B to solidify for 24 hours to obtain a solidified material; the solidified material was soaked in deionized water for 3 days at a mass ratio of 1:40, washed 5 times with absolute ethanol, and freeze-dried. Nanocellulose-based porous composites were obtained. Acetate nanocellulose, acetic acid, graphene, the parts by weight of chitosan solution are 30 parts of ...

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Abstract

The invention relates to a preparation method of a nano-cellulose-base porous composite material, belonging to the technical field of porous materials. The preparation method comprises the step of with bamboo raw fibers as a raw material, adding chitosan and agar, so as to prepare the nano-cellulose-base porous composite material. By adding graphene to prepare the nano-cellulose-base porous composite material, graphene belongs to a two-dimensional material and is a honeycomb-structure material formed by SP2 hybridized carbon atoms, has ultrahigh heat-conducting property, mechanical strength, gas impermeability and optical impermeability and excellent electrical conductivity and is taken as an inorganic nano-filler of the porous composite material, so that the mechanical properties of the porous composite material can be effectively improved; and by implanting carboxyl ions, the surface of graphene contains active functional groups, so that the cellular and biological reaction activities of the material are substantially improved.

Description

technical field [0001] The invention relates to a method for preparing a nanocellulose-based porous composite material, which belongs to the technical field of porous materials. Background technique [0002] Porous solids have the characteristics of low bulk density, large specific surface area, high specific mechanical properties, and good damping properties, and have become an excellent new functional structural material. Due to its excellent physical and mechanical properties, as well as the dual properties of function and structure, porous materials can be widely used in aerospace, electronic communication, transportation, atomic energy, medicine, environmental protection, metallurgy, machinery, construction, electrochemistry and petrochemical industry and other fields, involving separation, filtration, air distribution, sound attenuation, shock absorption, packaging, heat exchange, heat insulation and fire resistance, electromagnetic shielding, electrochemical process, ...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L5/08C08L1/12C08L5/12C08K5/09C08K3/04C08K5/1515
Inventor 赵文斌
Owner 赵文斌
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