Preparation method of ultraviolet-curable graphene dispersion liquid

A technology of graphene dispersion and ultraviolet light, which is applied in chemical instruments and methods, dyeing polymer organic compound treatment, fibrous fillers, etc., can solve the problems of inability to remove organic solvents, poor interface compatibility, etc., and achieve less defects, Gentle conditions, high-quality results

Active Publication Date: 2017-03-22
宁波聚泰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In high-boiling-point organic solvents (DMF, NMP, etc.), stable dispersed graphene can be obtained by means of ultrasonic liquid phase exfoliation, but in the further processing and utilization of this type of graphene, the high-boiling-point organic solvent cannot be removed; and the graphene Without any modification on the surface, the interfacial compatibility with the polymer is poor

Method used

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  • Preparation method of ultraviolet-curable graphene dispersion liquid
  • Preparation method of ultraviolet-curable graphene dispersion liquid
  • Preparation method of ultraviolet-curable graphene dispersion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2

[0040] Embodiment 1~2, comparative example 1~2

[0041] 1. Sample preparation

Embodiment 1

[0043]Step 1: Under the protection of ethylene gas, add 90mL of anhydrous dichloromethane and 9.911g of 1,4-butanediol diacrylate into a 250mL double-layer bottle, stir at 25°C for 30min; then add Anhydrous dichloromethane solution of Pd-diimine (0.2 g of Pd-diimine catalyst dissolved in 10 mL of anhydrous dichloromethane). The reaction temperature was controlled at 25° C., the ethylene pressure was 0.1 MPa, and the reaction was stirred for 24 hours. After the reaction, the reaction solution was transferred into 200 mL of 2 wt.% acidified methanol solution to terminate the reaction. The solvent was removed by blowing cold air with a blower, and the polymer was dissolved in 50 mL of dichloromethane solution, 5 drops of concentrated hydrochloric acid and 5 drops of hydrogen peroxide were added, and stirred for 2 hours to dissolve a small amount of residual Pd particles, and then 150 mL of methanol was added to precipitate the product. The polymer was further dissolved with tetr...

Embodiment 2

[0046] The first step: the preparation and purification process of HBPE@Acryl is the same as the first step in Example 1 to obtain pure HBPE@Acryl.

[0047] Step 2: Add 20 mg of HBPE@Acryl (synthesized by the above step 1), 20 mg of graphite (Sigma-Aldrich product, product number 332461) and 10 mL of tetrahydrofuran solvent (analytical grade) into a 20 mL thick glass test tube, place in a low-speed rotating After being placed on the shelf, it was placed in a 300W ultrasonic pool for 48 hours at room temperature. The resulting product was centrifuged at 4000rpm for 45min to get the upper graphene solution. Observe the appearance of the graphene solution.

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Abstract

The invention discloses a preparation method of ultraviolet-curable graphene dispersion liquid. The preparation method comprises the following steps: catalyzing ethylene and 1,4-butylene glycol diacrylate through a Pd-diimine catalyst for chain 'walking' copolymerization, and introducing a reactable acryloyl group into hyperbranched polyethylene (HBPE); carrying out CH-Pi action on the tail ends of multiple branch chains of an acryloyl-grafted hyperbranched polyethylene copolymer (HBPE@Acryl) and the surface of graphene, wherein the HBPE@Acryl can be effectively adsorbed to the surface of a graphene slice layer, so that the graphene can be uniformly dispersed in an organic solvent without being aggregated. The preparation method disclosed by the invention is simple in process, mild in condition and relatively small in environmental pollution; the prepared ultraviolet-curable graphene dispersion liquid has the advantages of high quality, low defect and long-time stable dispersion, can be used for preparing a flexible electronic device, an energy storage material, a sensing device and the like, and has a relatively good application prospect in the aspects of ultraviolet curing coating, functional conductive ink and the like.

Description

technical field [0001] The invention relates to the technical field of graphene preparation, in particular to a method for preparing an ultraviolet-curable graphene dispersion. Background technique [0002] Graphene is a two-dimensional crystal with a thickness of only one carbon atom layer. Due to its unique sp2 hybrid structure, graphene has excellent electrical and thermal conductivity, and its ultra-high specific surface area, Young's modulus, and fracture strength also make graphene There are wider applications. [0003] Graphene can be prepared in various ways, mainly including micromechanical exfoliation, oxidation-reduction, and vapor deposition. The micromechanical exfoliation method takes a long time and cannot realize the mass production of graphene; although the redox method can produce graphene in large quantities, it is easy to introduce structural defects such as oxygen-containing functional groups and destroy the original conjugation of graphene. The struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/46C09C3/10C09C3/04C08F210/02C08F222/14
CPCC01P2006/22C08F210/02C09C1/46C09C3/006C09C3/10C08F222/102
Inventor 徐立新郑爱爱
Owner 宁波聚泰新材料科技有限公司
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