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Functional hyperbranched polyethylene and preparation thereof, and application thereof in preparation of high-stability flexible conductive/electro-thermal film

A hyperbranched polyethylene, functional technology, applied in the production of bulk chemicals, etc., can solve the problems of fragility and flexibility, complex preparation process, general conductivity, etc., and achieve the effect of improving stability and improving production efficiency

Inactive Publication Date: 2020-06-23
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the high price and limited supply of indium in ITO, the fragility and flexibility of the ITO layer, and the complicated preparation process, and ITO itself is a carcinogen announced by the World Health Organization, which limits its application in medical and health care; Although metal has excellent electrical conductivity, its preparation cost is high, the process is complicated, and the requirements for equipment are too high, so it cannot be mass-produced; although conductive carbon black is cheap, its flexibility is poor and its conductivity is average, so it cannot be used in high-end products. Products; as a research hotspot in the 21st century, graphene has the characteristics of extremely excellent electrical mobility, thermal conductivity, good toughness, and high strength, and is considered to be the best substitute for ITO

Method used

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  • Functional hyperbranched polyethylene and preparation thereof, and application thereof in preparation of high-stability flexible conductive/electro-thermal film
  • Functional hyperbranched polyethylene and preparation thereof, and application thereof in preparation of high-stability flexible conductive/electro-thermal film
  • Functional hyperbranched polyethylene and preparation thereof, and application thereof in preparation of high-stability flexible conductive/electro-thermal film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1, comparative example 1

[0062] 1. Sample preparation

[0063] (1) The preparation of embodiment 1 sample is carried out as follows:

[0064] Step 1: Under nitrogen protection, add 1-pyrenemethanol (50 g / 0.022mol), triethylamine (18mL / 0.13mol) and anhydrous grade THF (230mL) in sequence in a 250mL Schlenk reaction flask, at room temperature Stir for 10 min to form a solution, then add acryloyl chloride (10.5 mL / 0.13 mol) dissolved in 30 mL of anhydrous THF dropwise within 4 h under the control of an ice bath, and continue stirring at room temperature for 24 h after the addition is complete. After the reaction was finished, the salt and by-products generated by the reaction were removed by filtration, and the obtained filtrate was concentrated to obtain an oily product. After dissolving in 100 mL of dichloromethane, it was successively passed through hydrochloric acid aqueous solution (mass concentration 1%), saturated aqueous solution of sodium bicarbonate...

Embodiment 2-3、 comparative example 2-4

[0081] 1. Sample preparation

[0082] (1) The preparation of embodiment 2 sample is carried out as follows:

[0083] Get the graphene dispersion containing excess functional HBPE obtained in the "4th step" of an appropriate amount of embodiment 1, and dilute it into polymer concentration C with fresh chloroform p =500mg / L, graphene concentration C g = 48 mg / L.

[0084] (2) The preparation of comparative example 2 sample is carried out as follows:

[0085] Take an appropriate amount of the functional HBPE prepared in Example 1, and prepare it with fresh chloroform to a concentration of 500 mg / L.

[0086] (3) The preparation of embodiment 3 sample is carried out as follows:

[0087] The 1st step: get the graphene dispersion that contains excess functional HBPE that obtains in 30mL embodiment 1 " the 4th step ", filter with PTFE filter membrane (aperture 100nm).

[0088] Step 2: Take a 100mL cylindrical glass bottle, add 30mL of fresh chloroform, put the above filter membran...

Embodiment 2

[0096] The fluorescence emission spectra of Example 2 and Comparative Example 2 were measured by a Japanese Hitachi F-4600 fluorescence spectrophotometer. The test range is 360-600nm, and the temperature is 25°C.

[0097] (2) Thermogravimetric test

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Abstract

The invention discloses functional hyperbranched polyethylene and application thereof in the preparation of a high-stability flexible conductive / electro-thermal film. The functional hyperbranched polyethylene is obtained by catalyzing 1,4-butanediol diacrylate shown as a formula (I), a pyrene-containing monomer shown as a formula (II) and ethylene through a Pd-diimine catalyst according to a one-step chain transfer copolymerization mechanism. The invention provides an application of functional hyperbranched polyethylene in the preparation of a flexible conductive / electro-thermal film. The preparation method specifically comprises the following steps: (1) stripping graphite from the functional hyperbranched polyethylene by virtue of ultrasonic waves to obtain a graphene dispersion liquid; (2) painting the functional HBPE containing graphene dispersion liquid prepared in the step (1) on a flexible substrate; and (3) carrying out an ultraviolet curing treatment on a graphene layer containing filter membrane obtained in the step (2) to obtain the flexible conductive / electro-thermal film. The graphene dispersion liquid is obtained by utilizing the functional hyperbranched polyethylene,and the flexible conductive / electro-thermal film prepared from the graphene dispersion liquid has excellent stability.

Description

technical field [0001] The invention relates to a functional hyperbranched polyethylene, its preparation method and its application in the preparation of flexible conductive / electrothermal film. Background technique [0002] In recent years, as an important new material, flexible conductive film has been continuously developed because of its excellent properties such as flexibility and conductivity. At present, the flexible conductive film is mainly stacked with a conductive layer and a flexible substrate. The flexible substrate is mainly: PET, PI, PVC, silicone rubber or thermosetting resin, etc.; the conductive layer is mainly: ITO, nano gold (silver, copper, aluminum, zinc, etc.) ), graphene / graphene oxide, conductive carbon black, etc. Among them, the high price and limited supply of indium in ITO, the fragility and flexibility of the ITO layer, and the complicated preparation process, and ITO itself is a carcinogen announced by the World Health Organization, which limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/02C08F220/18C08F222/14C08F4/80C08L23/08C08K3/04C08J5/18
CPCC08F210/02C08J5/18C08J2323/08C08K2201/001C08K3/042C08F4/80Y02P20/52
Inventor 徐立新胡特叶会见
Owner ZHEJIANG UNIV OF TECH
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