Unlock instant, AI-driven research and patent intelligence for your innovation.

Cellulose nanocrystal-based composite material as well as preparation method and application thereof

A composite material and cellulose technology, which is applied in the field of cellulose nanocrystal matrix composite materials and their preparation, can solve the problems of hindering the thermal conductivity of composite materials, cumbersome preparation process, and failure of cellulose nanocrystals to smoothly form an ordered network structure, etc. Achieve the effect of improving thermal conductivity, good flame retardant performance, improving thermal conductivity and processing performance

Inactive Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not only relatively cumbersome in the preparation process, but the introduction of large-size thermally conductive nanofillers also prevents the formation of a complete ordered network structure of cellulose nanocrystals, and the interface between silver nanoparticles and other fillers and cellulose nanocrystals Thermal resistance will hinder the further improvement of the overall thermal conductivity of composite materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cellulose nanocrystal-based composite material as well as preparation method and application thereof
  • Cellulose nanocrystal-based composite material as well as preparation method and application thereof
  • Cellulose nanocrystal-based composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] Correspondingly, the preparation method of the cellulose nanocrystalline matrix composite material comprises the following steps:

[0045] (1) preparation of silver nanoparticles aqueous dispersion;

[0046] (2) dispersing the cellulose nanocrystals in water to obtain a cellulose nanocrystal water dispersion; dissolving polyethylene glycol in water to obtain an aqueous polyethylene glycol solution;

[0047] (3) uniformly mix the silver nanoparticle aqueous dispersion prepared in step (1) with the cellulose nanocrystal aqueous dispersion prepared in step (2) and polyethylene glycol aqueous solution to obtain a blend dispersion; for example, Uniform mixing is achieved by means of ultrasonic dispersion and a stirring dispersion method with a rotation speed of not less than 100 rpm, so that cellulose nanocrystals, silver nanoparticles and polyethylene glycol are uniformly dispersed;

[0048] (4) Add the blend dispersion obtained in step (3) into a mold, and volatilize wate...

Embodiment 1

[0060] A cellulose nanocrystal composite material, including cellulose nanocrystals, silver nanoparticles and polyethylene glycol. The cellulose nanocrystals have a chiral nematic helical structure, and the silver nanoparticles are uniformly coated on the surface of the cellulose nanocrystals after low-temperature fusion. , using it as a template to form a continuous and orderly network structure, the addition amount is 1 vol% of the cellulose nanocrystals; polyethylene glycol is uniformly dispersed in the cellulose nanocrystals, and the addition amount is 10 vol% of the cellulose nanocrystals. Before low-temperature fusion, the average particle size of silver nanoparticles is 100nm.

[0061] The preparation of the cellulose nanocrystalline composite material comprises the following steps:

[0062] (1) preparation of silver nanoparticles aqueous dispersion;

[0063] (1-1) Add 10 g of solid polyvinylpyrrolidone with a molecular weight of 10,000 to 50 ml of ethylene glycol, sti...

Embodiment 2

[0071] A cellulose nanocrystal composite material, including cellulose nanocrystals, silver nanoparticles and polyethylene glycol. The cellulose nanocrystals have a chiral nematic helical structure, and the silver nanoparticles are uniformly coated on the surface of the cellulose nanocrystals after low-temperature fusion. , using it as a template to form a continuous and ordered network structure, the silver nanoparticles are partially melted and evenly coated on the surface of the cellulose nanocrystals to form an ordered network structure, and the addition amount is 5vol% of the cellulose nanocrystals; polyethylene glycol is evenly Dispersed in the cellulose nano crystal, the addition amount is 15vol% of the cellulose nano crystal. Before low-temperature fusion, the average particle size of silver nanoparticles is 90nm.

[0072] Described cellulose nanocrystalline composite material, its preparation method, comprises the following steps:

[0073] (1) preparation of silver n...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Melting pointaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of composite materials, and discloses a cellulose nanocrystal-based composite material as well as a preparation method and application thereof. The cellulose nanocrystal-based composite material comprises cellulose nanocrystals, silver nanoparticles and polyethylene glycol, wherein the cellulose nanocrystals have a chiral nematic spiral structure, the silver nanoparticles uniformly coat the surfaces of the cellulose nanocrystals after low-temperature fusion, a continuous and ordered network structure is formed by taking the cellulose nanocrystals as a template, and the content of the silver nanoparticles is 1 vol%-20 vol% of the content of the cellulose nanocrystals. According to the invention, the cellulose nanocrystals, the silver nanoparticles and thepolyethylene glycol are directly utilized to construct the composite material, an ordered heat conduction network is formed through connection by taking the cellulose nanocrystals as a template, the silver nanoparticles can be uniformly dispersed in the composite material and form an oriented structure by a simple preparation method without the help of other nanofillers, excellent heat conductionperformance is obtained under the condition of low filling amount, and meanwhile, the processing performance of the composite material is ensured.

Description

technical field [0001] The invention belongs to the field of composite materials, and more specifically relates to a cellulose nanocrystal-based composite material and its preparation method and application. The cellulose nanocrystal composite material has high thermal conductivity. Background technique [0002] Electronic products are developing towards ultra-high system integration, miniaturization and high density, followed by electronic devices, especially high-power devices, which will generate high-density heat during the working process, causing the temperature of electronic products to rise rapidly, thereby improving reliability. A sharp decline. Therefore, efficient heat dissipation has become an urgent problem to be solved for the new generation of electronic products. To solve this problem, in addition to optimizing the system to reduce heat generation, the most direct and effective method is to use thermal interface materials with high thermal conductivity in th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L1/16C08L71/02C08K3/08C08J7/00C08J5/18B22F9/24B22F1/00B82Y40/00H01L23/373
CPCC08L1/16C08J7/08C08J5/18B22F9/24B82Y40/00H01L23/3737C08K2201/011C08K2003/0806C08K2201/003C08J2301/16C08J2471/02B22F1/054C08L71/02C08K3/08
Inventor 解孝林张洋轲叶昀昇曾红霞周兴平
Owner HUAZHONG UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com