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Graphene/water-soluble polymer composite material and preparation method thereof

A technology of water-soluble polymers and composite materials, applied in the field of polymers, can solve the problems of poor mechanical properties of thin films, and achieve the effects of good mechanical properties, improved dispersibility, and excellent thermal conductivity.

Active Publication Date: 2020-11-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this solution improves the dispersion of graphene in water and organic reagents through modifiers, it does not solve the problem of poor mechanical properties of the film

Method used

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  • Graphene/water-soluble polymer composite material and preparation method thereof
  • Graphene/water-soluble polymer composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment adopts the following method to prepare composite membrane material:

[0057] (1) Take 5 parts by weight of sulfonated poly(p-phenylene vinylene), add it to 992.5 parts by weight of deionized water, and mechanically stir to make the sulfonated poly(p-phenylene) completely dissolve in water to form a uniform modification solution; Add 2.5 parts by weight of graphene in the liquid, and use ultrasonic treatment for 30min to obtain a graphene mass fraction of 0.25% aqueous dispersion, wherein the mass fraction of modifier is 0.5%;

[0058] (2) 1 weight part of polyvinyl alcohol is added to 99 parts by mass of deionized water for dissolving to obtain a polyvinyl alcohol solution, and 332 parts by mass of the graphene aqueous dispersion of surface non-covalent bond modification described in step (1) is taken , 17 parts by mass of polyvinyl alcohol solution, after ultrasonic treatment for 30min (162W, 1s on, 2s off) to obtain the film liquid of scraping film;

...

Embodiment 2

[0062] This embodiment adopts the following method to prepare composite membrane material:

[0063] (1) Weigh 5 parts by weight of polysulfonyl [4,8-disubstituted-(1,2-b:4,5-b')benzodithiophene]-[2,6-substituted thiophene], Add to 992.5 parts by weight of deionized water, and mechanically stir to make polysulfonyl[4,8-disubstituted-(1,2-b:4,5-b')benzodithiophene]-[2,6- Substituted thiophenes] are completely dissolved in water to form a uniform modification solution; 2.5 parts by weight of graphene are added to the modification solution, and homogeneous treatment is used for 30min to obtain a graphene mass fraction of 0.25% aqueous dispersion, wherein the modification agent The mass fraction is 0.5%;

[0064] (2) 1 weight part of hydroxycellulose-hydroxymethylcellulose is added to 99 parts by mass of deionized water for dissolution to obtain a solution of hydroxycellulose-hydroxymethylcellulose, which is described in step (1) in 284 parts by mass Surface non-covalent bond mod...

Embodiment 3

[0068] This embodiment adopts the following method to prepare composite membrane material:

[0069] (1) Weigh 3 parts by weight of aromatic polysulfide ketone and sulfonated polyaniline mixture (1:1), add it to 294 parts by weight of deionized water, stir mechanically, and make aromatic polysulfide ketone and sulfonated polyaniline The polyaniline mixture is completely dissolved in water to form a uniform modification solution; 3 parts by weight of graphene is added to the modification solution, and colloidal grinding is used for 30 minutes to obtain an aqueous dispersion with a mass fraction of graphene of 1%, wherein the mass fraction of the modification agent 1%;

[0070] (2) 2 weight parts of carboxyl-containing starch-carboxymethyl starch are added to 98 parts by mass of deionized water for dissolution to obtain carboxyl-containing starch-carboxymethyl starch solution, and 80 parts by mass of the surface non- Covalent bond modified graphene aqueous dispersion, 10 parts b...

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Abstract

The invention discloses a graphene / water-soluble polymer composite material and a preparation method thereof. The composite material comprises graphene accounting for 20-90wt% of the total mass of thecomposite material; a modifier accounting for 0.4-70wt% of the total mass of the composite material; and the rest part of the composite material being a water-soluble polymer. The modifier contains an aromatic ring conjugated structure and coats the surface of graphene. The preparation method comprises the following steps: dissolving a modifier containing an aromatic ring conjugated structure anda hydrophilic group in deionized water, adding graphene, and mixing to obtain a surface-modified graphene aqueous dispersion; and mixing the dispersion with an aqueous solution of a water-soluble polymer to obtain a membrane liquid, coating the membrane liquid, and crosslinking to obtain the self-supporting graphene / water-soluble polymer composite membrane material. The modifier is mixed with graphene, the dispersion performance of graphene in water is improved on the premise of not destroying the chemical structure of graphene, the prepared composite membrane material has a good heat-conducting property, and the mechanical property of the composite membrane material is further improved through crosslinking.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and in particular relates to a graphene / water-soluble polymer composite material and a preparation method thereof. Background technique [0002] With the development of science and technology, the internal structure of high-power density electronic devices and high-end electronic industrial devices is becoming more and more complex, the assembly is becoming more and more intensive, and the problem of heat dissipation is gradually becoming prominent. According to reports, when the temperature of electronic devices rises by 5°C, their service life will be shortened by 10%, and the reliability will drop by 50% for every 10°C increase in temperature, which severely limits the development of electronic devices in the direction of miniaturization and functional integration. . [0003] Graphene has the characteristics of light weight, high thermal conductivity, and strong corrosion resistance. I...

Claims

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Application Information

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IPC IPC(8): C09D129/04C09D101/28C09D103/08C09D133/26C09D135/00C09D139/06C09D7/62C03C17/00
CPCC03C17/009C03C2217/29C03C2218/114C09D101/284C09D103/08C09D129/04C09D133/26C09D135/00C09D139/06C09D7/62C08K9/10C08K3/042
Inventor 马永梅庄亚芳张京楠郑鲲叶钢曹新宇
Owner INST OF CHEM CHINESE ACAD OF SCI