Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Heat-conducting graphene-polymer composite thin film and preparation method and application thereof

A technology of composite film and heat-conducting graphite, which is applied in the field of heat-conducting polymer composite materials, shape-memory polymer composite materials, and functional composite materials. The effects of industrialized manufacturing and low-cost promotion and application, compact process, and easy-to-obtain components

Inactive Publication Date: 2020-01-31
SHANGHAI UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal deformation temperature of the shape memory high thermal conductivity medical external fixation multilayer material provided by the invention is 50-70°C, but its main components are high-priced raw materials such as polycaprolactone and silicone rubber, and special preparation of nano-silver is required. Loading graphene microchips leads to more preparation procedures and higher costs, making it difficult to industrialize preparation and promotion, which limits its application.

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
  • Heat-conducting graphene-polymer composite thin film and preparation method and application thereof
  • Heat-conducting graphene-polymer composite thin film and preparation method and application thereof
  • Heat-conducting graphene-polymer composite thin film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] See attached Figure 1~3 , the heat-driven shape memory heat-conducting graphene-polymer composite film material provided by this embodiment is made of the following components by weight percentage:

[0032] Graphene 10-30,

[0033] Nanocellulose 35-45,

[0034] Polyethylene glycol 35-45.

[0035] The average horizontal size of the graphene is 5-10 μm, the average thickness is 6-8 nm, and the oxygen element content is ≤2.50%; the diameter of the nanocellulose is 5-100 nm, and the aspect ratio is 100-1000; polyethylene Diols have a molecular weight of 6,000 to 10,000.

[0036] The preparation method of the heat-conducting graphene-polymer composite film of aforementioned heat-driven shape memory, comprises the following steps:

[0037] (1) Graphene is added into deionized water, ultrasonically dispersed for 0.5-1 h, and a graphene dispersion with a concentration of 1-5 mg / mL is prepared;

[0038] (2) Nanocellulose is added to deionized water, ultrasonically disperse...

Embodiment 2

[0045] The thermally-driven shape memory heat-conducting graphene-polymer composite film material, preparation method and application thereof provided in this embodiment are basically the same as in Example 1, except that:

[0046] The weight percentage of graphene, nanocellulose and polyethylene glycol for preparing the composite film material is 20:40:40.

[0047] The preparation method of the thermally-driven shape memory heat-conducting graphene-polymer composite film comprises the following steps:

[0048] (1) Graphene is added into deionized water, ultrasonically dispersed for 0.5h, and a graphene dispersion with a concentration of 5mg / mL is prepared;

[0049] (2) adding nanocellulose into deionized water, ultrasonically dispersing for 0.5 h, and preparing a nanocellulose dispersion with a concentration of 5 mg / mL;

[0050] (3) Polyethylene glycol was added to deionized water, ultrasonically dispersed for 0.5 h, and a polyethylene glycol dispersion with a concentration of...

Embodiment 3

[0055] The steps of this embodiment are the same as those of Example 1, the difference being the weight ratio of graphene, nanocellulose and polyethylene glycol in the thermally conductive graphene-polymer composite film of heat-driven shape memory described in this embodiment For 25:37.5:37.5.

[0056] The thermal conductivity of the thermally actuated shape memory thermally conductive graphene-polymer composite film prepared in Example 3 was tested with a laser thermal conductivity meter LFA447 from the German Netzsch Company, and the test result was: the transverse thermal conductivity was 12.46W m -1 ·K -1 , and has very good flexibility, after bending 500 degrees, the thermal conductivity ranges from 0 to 10%. The shape recovery rate of the composite film within 60s at 70°C is greater than 90%.

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
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
heat deflection temperatureaaaaaaaaaa
Login to View More

Abstract

The invention discloses a heat-conducting graphene-polymer composite thin film which is prepared from the following components by the weight percentage: 10%-30% of graphene, 35%-45% of nano-celluloseand 35%-45% of polyethylene glycol. The invention also discloses a preparation method of the heat-conducting graphene-polymer composite thin film, wherein the preparation method comprises the steps: uniformly mixing and stirring a prepared graphene dispersion liquid, a nano-cellulose dispersion liquid and a polyethylene glycol dispersion liquid according to a certain weight ratio, and then carrying out ultrasonic treatment for 0.5-1 h to obtain a graphene-nano-cellulose-polyethylene glycol mixed solution with the concentration of 1-5 mg / mL; putting the graphene-polyethylene glycol-nano-cellulose mixed solution into a vacuum drying oven, standing for 1-2 h in a vacuum environment at room temperature, removing gas existing in the mixed solution, pouring the liquid into a mold, putting the mold into a drying oven, and drying for 12-24 h at the temperature of 40-50 DEG C, so as to obtain the heat-conducting graphene-polymer composite thin film. The preparation method disclosed by the invention is simple in process and easy to industrialize; the prepared composite thin film has flexibility, high transverse thermal conductivity and thermally driven shape memory performance, and can be applied to manufacturing of intelligent products.

Description

technical field [0001] The invention relates to the technical field of functional composite materials, in particular to a thermally conductive graphene-polymer composite film with thermally driven shape memory and a preparation method thereof, belonging to the fields of thermally conductive polymer composite materials and shape memory polymer composite materials. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial with high specific surface area, excellent mechanical properties and thermal conductivity. Theoretical research shows that the thermal conductivity of graphene at room temperature is 5300W·m -1 ·K -1 , is currently known to have the highest thermal conductivity of the material, is a very ideal thermal conductivity filler. After adding graphene, the thermal conductivity of polymer materials can be greatly improved, while maintaining other properties of itself. [0003] Cellulose materials have the characteristics of wide so...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/04C08L71/02C08K3/04
CPCC08J5/18C08J2301/04C08J2371/02C08K3/042
Inventor 丁鹏崔思奇宋娜施利毅
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com