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Cellulose-graphene composite transparent conductive film and preparation method thereof

A graphene composite and transparent conductive film technology, which is applied in cable/conductor manufacturing, circuits, electrical components, etc., can solve problems such as easy fracture, affecting product performance, and interlayer agglomeration, so as to improve mobility and excellent antibacterial performance , Improve the effect of dispersion

Active Publication Date: 2019-05-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a patent CN104910394A that introduces a method for preparing nano-microcrystalline cellulose by graphene oxide-catalyzed acid hydrolysis. The above-mentioned patents all record that graphene can be composited with nano-cellulose to form composite products. However, the problem That is, while ensuring a certain amount of graphene added in the composite product, there are problems such as uneven dispersion of graphene particles in the nanocellulose, uneven particle size, and easy interlayer agglomeration. The stress concentration points brought by graphene-like substances will easily break and affect the performance of the prepared product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Preparation of cellulose-graphene solution:

[0029] Add 3 g of cotton to 97 g of alkaline urine solution, freeze at -15°C for 1 hour; keep stirring for 30 minutes to thaw, and centrifuge (4500 rpm, 10 minutes) to obtain a cellulose solution. Then add 0.01 g of graphene and stir for 30 min at -15°C.

[0030] 2) Preparation of cellulose gel-graphene gel:

[0031] Add 1.6g of N,N-methylenebisacrylamide into 100ml of cellulose-graphene solution, raise the temperature to 30-60°C and stir for 1 hour, form a gel in a water bath at 30°C, and replace it with deionized water to pH =7.

[0032] 3) Preparation of cellulose-graphene film:

[0033] The cellulose-graphene gel was formed into a thin film by thermocompression molding. The pressure of the hot press is 50pa, the time is 1h, and the temperature is 60°C to obtain a transparent cellulose-graphene film.

Embodiment 2

[0035] 1) Preparation of cellulose-graphene solution:

[0036] Add 3 g of cotton to 97 g of alkaline urine solution, freeze at -15°C for 1 hour; keep stirring for 30 minutes to thaw, and centrifuge (4500 rpm, 10 minutes) to obtain a cellulose solution. Then add 0.01 g of graphene and stir for 30 min at -15°C.

[0037] 2) Preparation of cellulose gel-graphene gel:

[0038] Add 2 g of glutaraldehyde into 100 ml of cellulose-graphene solution, raise the temperature to 40°C and stir for 1 hour, form a gel in a water bath at 40°C, and replace it with deionized water to pH=7.

[0039] 3) Preparation of cellulose-graphene film:

[0040] The cellulose-graphene gel was formed into a thin film by thermocompression molding. The pressure of the hot press is 80pa, the time is 1.5h, and the temperature is 60°C to obtain a transparent cellulose-graphene film.

Embodiment 3

[0042] 1) Preparation of cellulose-graphene solution:

[0043]Add 3 g of cotton to 97 g of alkaline urine solution, freeze at -12°C for 1.5 h; thaw with continuous stirring for 30 min, and centrifuge (5000 rpm, 10 min) to obtain a cellulose solution. Then add 0.01 g of graphene and stir for 30 min at -12°C.

[0044] 2) Preparation of cellulose gel-graphene gel:

[0045] Add 2g of epichlorohydrin into 100ml of cellulose-graphene solution, raise the temperature to 60°C and stir for 1 hour, form a gel in a water bath at 30°C, and replace it in deionized water to pH=7.

[0046] 3) Preparation of cellulose-graphene film:

[0047] The cellulose-graphene gel was formed into a thin film by thermocompression molding. The pressure of the hot press is 50pa, the time is 2h, and the temperature is 60°C to obtain a transparent cellulose-graphene film.

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Abstract

The invention discloses a cellulose-graphene composite transparent conductive film and a preparation method thereof. The invention firstly prepares a cellulose alkaline urine solution and then adds graphene, and the sodium hydroxide-urea hydrate formed by the alkaline urine solution in a subzero environment can be easily inserted into the interlayer region of the graphene and adhered to a host layer, thereby destroying the original hydrogen bond network, forming a new hydrogen bond network, realizing the layer-by-layer peeling of graphene, and obtaining a uniformly dispersed graphene-cellulosesolution. Then a crosslinking agent is added to form a cellulose-graphene gel, and a conductive film is obtained by hot press molding. The graphene and cellulose dispersed in the conductive film provided by the invention form a stable crosslinked structure under the action of a crosslinking agent, which can fully exert the conductivity of the grapheme. At the same time, excellent antibacterial properties, hot water resistance and anti-static function are additionally brought to the conductive film to build a highly transparent multi-functional conductive film with a wide application prospect.

Description

technical field [0001] The invention belongs to the field of transparent conductive composite materials, in particular to a cellulose-graphene composite transparent conductive film and a preparation method thereof. Background technique [0002] With the acceleration of the upgrading of electronic products, conductive thin film materials with light weight and high light transmittance are more and more widely used. These transparent conductive films are widely used in displays of electronic products, thin solar cells, and optoelectronic materials, and have great application prospects. At present, some organic polymer materials with high transparency and good thermal stability are mainly used as base materials for transparent conductive films in optoelectronic materials. However, these artificial organic polymer materials are difficult to degrade and will cause damage to the ecological environment. In order to realize the sustainable development of resources, the need to repl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00
Inventor 刘琳李震姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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