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Preparation and application of a green nanocellulose composite film with high thermal conductivity

A nanocellulose, high thermal conductivity technology, applied in the field of thermally conductive materials, can solve the problems of complicated preparation of thermally conductive materials, harmful to the environment, etc., and achieve the effects of reducing interface thermal resistance and defects, improving thermal conductivity, and reducing agglomeration effect.

Active Publication Date: 2022-04-05
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the cumbersome preparation of existing thermally conductive materials and to a certain extent harmful to the environment, the primary purpose of the present invention is to provide a method for preparing a green nanocellulose composite film with high thermal conductivity

Method used

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  • Preparation and application of a green nanocellulose composite film with high thermal conductivity
  • Preparation and application of a green nanocellulose composite film with high thermal conductivity
  • Preparation and application of a green nanocellulose composite film with high thermal conductivity

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Take 1.0 g of black phosphorus crystals and 30.0 g of urea, add 125 ml of deionized water, put them in a ball mill and mill them for 4 hours at a speed of 500 r / min. After the ball milling, the reaction solution was centrifuged at 1000 r / min for 10 minutes to remove the bulk phosphorene in the lower layer. Subsequently, the suspension in the upper layer was continuously centrifuged at 5000 r / min for 30 minutes, and the precipitate in the lower layer was placed in a vacuum drying oven at 50° C. for 1 hour to obtain phosphorene amides.

[0038] (2) Take 20.0 mg of carboxymethyl chitosan and add 40 ml of deionized water, stir, and slowly sonicate for 30 minutes, and set the temperature at 35°C. Then transfer to a three-necked flask, add 20 mg of phosphorene amides, adjust the pH between 7-10 with a weak base, add 2.0 mg of 1-ethyl-(3-dimethylaminopropyl) carbodiimide And 3.0mg of N-hydroxysuccinimide, the rotating speed is 300r / min, react for 10 hours, and the obtaine...

Embodiment 2

[0041] (1) Take 1.5g of black phosphorus crystals and 60.0g of urea, add 200ml of deionized water, put them in a ball mill and mill them for 6 hours at a speed of 600r / min. After the ball milling, the reaction solution was centrifuged at 1500 r / min for 15 minutes to remove the bulk phosphorene in the lower layer. Subsequently, the upper suspension was taken and continued to be centrifuged at 6000 r / min for 35 minutes, and the lower sediment was taken and placed in a vacuum drying oven at 60° C. for 1 hour to obtain phosphorene amides.

[0042] (2) Take 25.0 mg of carboxymethyl chitosan and add 50 ml of deionized water, stir, and slowly sonicate for 60 minutes, and set the temperature at 38°C. Then transfer to a three-necked flask, add 25 mg of phosphorene amides, adjust the pH between 7-10 with a weak base, add 2.5 mg of 1-ethyl-(3-dimethylaminopropyl) carbodiimide And 4.0mg of N-hydroxysuccinimide, the rotating speed is 350r / min, react for 5 hours, and the obtained product i...

Embodiment 3

[0045] (1) Take 2.0g of black phosphorus crystals and 80.0g of urea, add 250ml of deionized water, put them in a ball mill and mill them for 8 hours at a speed of 650r / min. After the ball milling, the reaction solution was centrifuged at 2000 r / min for 20 minutes to remove the bulk phosphorene in the lower layer. Subsequently, the upper suspension was taken and continued to be centrifuged at 6500 r / min for 40 minutes, and the lower sediment was placed in a vacuum drying oven at 70° C. for 2 hours to obtain phosphorene amides.

[0046] (2) Take 30.0 mg of carboxymethyl chitosan and add 60 ml of deionized water, stir, and slowly sonicate for 50 minutes, and set the temperature at 40°C. Then transfer to a three-necked flask, add 30 mg of phosphorene amides, adjust the pH between 7-10 with a weak base, add 5.0 mg of 1-ethyl-(3-dimethylaminopropyl) carbodiimide And 6.0mg of N-hydroxysuccinimide, the rotating speed is 300r / min, react for 6 hours, and the obtained product is aminoph...

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Abstract

The invention belongs to the field of heat-conducting materials, and discloses a preparation method and application of a green nano-cellulose high heat-conductivity composite film. The green nanocellulose high thermal conductivity composite film is prepared by firstly preparing the amidated phosphorene by ball milling, then covalently reacting with carboxymethyl chitosan, and finally adding it to the nanocellulose solution; the The mass ratio of the aminated phosphorene to the carboxymethyl chitosan is 1:1 to 1:10; the mass ratio of the aminoated phosphorene / carboxymethyl chitosan to the nanocellulose is 1:1 to 1: 10. The green nanocellulose high thermal conductivity composite film of the present invention has a thermal conductivity greater than 5 W / m·k in the plane direction.

Description

technical field [0001] The invention belongs to the field of heat conduction materials, and in particular relates to the preparation of a green nanocellulose high heat conduction composite film and its application in the heat conduction field. Background technique [0002] With the integration and miniaturization of smart devices and portable devices, product heat dissipation has become an important issue in the electronics industry. Thermally conductive materials should have excellent comprehensive properties such as light weight, easy processing and molding, good mechanical properties, and low cost. The thermal conductivity coefficient of most polymer materials is between 0-0.2W / mK, so the development of thermal management materials with high thermal conductivity plays a decisive role in improving the life and safety of electronic equipment. Among many natural materials in nature, nanocellulose is currently the most abundant polymer material in the world. Nanocellulose ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L5/08C08J5/18C08B37/08
CPCC08J5/18C08B37/003C08J2301/02C08J2405/08
Inventor 吴昆汪坤鑫屈贞财孟惠发郑浩铤史珺
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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