Modified acrylic emulsion for electrically conductive printing ink and preparation method thereof

A technology of acrylic emulsion and conductive ink, which is applied in ink, applications, household appliances, etc. It can solve the problems of graphene oxide easy to agglomerate, affect the performance of composite materials, and endanger human health, and achieve excellent anti-adhesion performance and fast drying speed , the effect of high mechanical strength

Active Publication Date: 2018-01-26
INST OF CHEM ENG GUANGDONG ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0004] CN 103467676A discloses a preparation method of water-based graphene oxide modified poly(urethane-acrylate) composite material, the emulsion of the prepared composite material is uniform and stable, and the cured film has good mechanical properties, but due to the preparation In the process, a large amount of organic solvent N,N'-dimethylformamide is used to disperse graphene oxide for urethane-acrylate blending, which not only pollutes the environment and endangers human health, but also graphene oxide is easy to agglomerate and affects composite materials. performance

Method used

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  • Modified acrylic emulsion for electrically conductive printing ink and preparation method thereof

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[0031] The preparation method of above-mentioned conductive ink with modified acrylic acid emulsion comprises the following steps:

[0032] 1) Mix graphene oxide, silane coupling agent and hydrochloric acid, react at 65-85°C for 0.5-3 hours, and then add hydrazine hydrate aqueous solution for reduction reaction to obtain modified graphene;

[0033] 2) Mix the diisocyanate and the chain extender, evacuate the reaction at 55-75°C for 25-45 minutes, and then react at 65-85°C for 2-4 hours to obtain a polyurethane prepolymer, and then add 2-hydroxyethyl acrylate to the polyurethane The prepolymer is end-capped to obtain a double-bond-terminated polyurethane crosslinking agent;

[0034] 3) mixing the modified graphene of acrylate, styrene, step 1) and the double-bond-terminated polyurethane crosslinking agent of step 2), to obtain a mixed solution;

[0035] 4) Mix the anionic emulsifier, nonionic emulsifier, pH buffer and water evenly, raise the temperature to 65-80°C, add the mix...

Embodiment 1

[0038] A preparation method of modified acrylic acid emulsion for conductive ink, comprising the following steps:

[0039] 1) Mix 0.5g graphene oxide, 2mL 3-(methacryloyloxy)propyltrimethoxysilane and 2mL hydrochloric acid with a mass fraction of 35%, sonicate for 1h, react at 75°C for 2h, then add 3mL with a mass fraction of 60% The hydrazine hydrate aqueous solution carries out reduction reaction, obtains modified graphene;

[0040] 2) Mix 3.5g of isophorone diisocyanate (IPDI) and 7g of polyoxypropylene diol with a number average molecular weight of 2000, react in a vacuum at 55°C for 45min, then heat up to 85°C for 4h to obtain a polyurethane prepolymer, Then add 2g of acrylate-2-hydroxyethyl ester to block the polyurethane prepolymer, and react for 2h to obtain a double bond-blocked type polyurethane crosslinking agent;

[0041] 3) 5g methyl methacrylate, 15g butyl methacrylate, 10g styrene, the modified graphene of step 1) and the double-bond-terminated polyurethane cro...

Embodiment 2

[0044] A preparation method of modified acrylic acid emulsion for conductive ink, comprising the following steps:

[0045]1) Mix 0.7g graphene oxide, 3mL 3-(methacryloyloxy)propyltrimethoxysilane and 3mL hydrochloric acid with a mass fraction of 35%, sonicate for 1h, react at 75°C for 3h, then add 4mL with a mass fraction of 70% The hydrazine hydrate aqueous solution carries out reduction reaction, obtains modified graphene;

[0046] 2) Mix 4g of 4,4'-dicyclohexylmethane diisocyanate (HMDI) and 8g of polyoxyethylene diol with a number average molecular weight of 4000, react in a vacuum at 70°C for 40min, then heat up to 85°C for 4h to obtain polyurethane Add 3g of 2-hydroxyethyl acrylate to the prepolymer to block the polyurethane prepolymer, and react for 2 hours to obtain a double-bond-blocked polyurethane crosslinking agent;

[0047] 3) 15g methyl methacrylate, 10g butyl methacrylate, 15g styrene, the modified graphene of step 1) and the double-bond-terminated polyurethane...

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Abstract

The invention discloses a modified acrylic emulsion for electrically conductive printing ink and a preparation method thereof; the modified acrylic emulsion is prepared from acrylate, styrene, diisocyanate, 2-hydroxyethyl acrylate, graphene oxide, a chain extender, a silane coupling agent, hydrochloric acid, a hydrazine hydrate aqueous solution, a pH buffering agent, an initiator, an anion emulsifier, a nonionic emulsifier and water. The preparation method comprises the following steps: 1) preparation of modified graphene; 2) preparation of a double-bond terminated polyurethane cross-linking agent; 3) preparation of an acrylate, modified graphene and double-bond terminated polyurethane cross-linking agent mixed solution; and 4) polymerization reaction. The modified acrylic emulsion for theelectrically conductive printing ink has the advantages of both the polyurethane emulsion and the acrylic emulsion, avoids the graphene oxide from generating aggregation, has no use of organic solvents, and is safe and environmentally friendly; the drying speed is fast during film formation, and an obtained paint film has excellent physical and mechanical properties and electrical conductivity.

Description

technical field [0001] The invention relates to a modified acrylic emulsion for conductive ink and a preparation method thereof. Background technique [0002] Traditional conductive inks are all solvent-based, which not only pollutes the environment, but also endangers human health. As people's awareness of environmental protection increases day by day, there is an urgent need for an environmentally friendly conductive ink in the market, and water-based conductive ink has emerged as the times require, which has become a research hotspot in recent years. Water-based conductive ink is composed of conductive fillers, binders, additives, water, etc. The solvent is water, which is harmless to the human body and the environment. It is an important direction for the development of inks. Conductive fillers in conductive inks are mainly divided into two types: metal-based and carbon-based, but metal-based conductive fillers have disadvantages such as high price and easy oxidation, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F283/00C08F220/18C08F220/14C08F212/08C08F2/26C08F2/30C09D11/52C09D11/107
Inventor 贾康乐余龙飞张雄张磊戴永强苏瑜钟本镔熊文杰高敏麦裕良廖兵
Owner INST OF CHEM ENG GUANGDONG ACAD OF SCI
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