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Graphene in-situ grafted polyester film and preparation method thereof

A technology of grafting polyester and graphene, applied in the field of polyester film processing, can solve the problems of antistatic attenuation, affecting surface finish, poor compatibility, etc., to improve electrical conductivity, improve hydrophobicity, oil repellency and stain resistance Effect

Inactive Publication Date: 2019-09-13
义乌海源塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyester film determines its electrical insulation due to its molecular characteristics, and its surface resistance reaches 10 14 -10 16 Ω, therefore, the polyester film is easy to cause the problem of electrostatic charge accumulation in the process of processing and production, which not only affects the normal use, but also absorbs dust, dust or grease in the environment due to electrostatic action, affecting its surface finish
In the prior art, an antistatic PET film is produced mainly by filling inorganic antistatic agents mainly composed of carbon black, carbon fiber, carbon nanotubes, graphite, metal particles, etc. in polyester resin by means of physical doping. Poor compatibility with organic polymer materials, prone to interface delamination or precipitation of inorganic particles, which affects the antistatic properties of polyester films. As time goes by, the stability of the composite system becomes worse, and the antistatic Declining sex

Method used

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  • Graphene in-situ grafted polyester film and preparation method thereof
  • Graphene in-situ grafted polyester film and preparation method thereof
  • Graphene in-situ grafted polyester film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 prepares graphene in situ graft polyester film

[0019] S1: Synthesis of modified PET raw materials: disperse 6% hydroxylated graphene and 4% aminated graphene in 36% ethylene glycol by mass percentage, add 0.5% silane coupling agent dropwise, stir for 30 minutes, and then add 52% Terephthalic acid, 0.5% triphenyl phosphite, 1% composite catalyst, the composite catalyst is composed of antimony methanol and thionyl chloride in a mass ratio of 1:0.5, and the reaction conditions are at a temperature of 260°C and a vacuum of 150Pa Next, condensation copolymerization for 6h;

[0020] S2: Dry the modified PET raw material prepared in S1 at 120°C for 3 hours, and blend it with polyphenylene vinylene, lotus leaf hydrophobic agent, and perfluorooctyltriethoxysilane at a mass ratio of 100:1:1:1. , after melt-extruding at 270°C, casting on a cold drum at 15°C, and then biaxially stretching at 110°C, controlling the longitudinal stretching ratio to 4 times and the tra...

Embodiment 2

[0021] Embodiment 2 prepares graphene in situ graft polyester film

[0022] S1: Synthesis of modified PET raw materials: Disperse 8% hydroxylated graphene and 5% aminated graphene in 37% ethylene glycol by mass percentage, add 0.8% silane coupling agent dropwise, stir for 30 minutes, and then add 47% Terephthalic acid, 1% triphenyl phosphite, 1.2% composite catalyst, the composite catalyst is composed of antimony methanol and thionyl chloride in a mass ratio of 1:0.6, and the reaction conditions are at a temperature of 270°C and a vacuum of 200Pa Next, condensation copolymerization 8h;

[0023] S2: Dry the modified PET raw material produced in S1 at 130°C for 3 hours, and blend it with polyphenylene vinylene, lotus leaf hydrophobic agent, and perfluorooctyltriethoxysilane at a mass ratio of 100:2:2:1 , after melt-extruding at 280°C, casting on a cold drum at 20°C, and then biaxially stretching at 110°C, controlling the longitudinal stretching ratio to 4 times and the transver...

Embodiment 3

[0024] Embodiment 3 prepares graphene in situ graft polyester film

[0025] S1: Synthesis of modified PET raw materials: Disperse 10% hydroxylated graphene and 6% aminated graphene in 38% ethylene glycol by mass percentage, add 1% silane coupling agent dropwise, stir for 30 minutes, and then add 42% Terephthalic acid, 1.5% triphenyl phosphite, 1.5% composite catalyst, the composite catalyst is composed of antimony methanol and thionyl chloride at a mass ratio of 1:0.8, and the reaction conditions are at a temperature of 280°C and a vacuum of 200Pa Next, condensation copolymerization for 12h;

[0026] S2: Dry the modified PET raw material produced in S1 at 140°C for 3 hours, and blend it with polyphenylene vinylene, lotus leaf hydrophobic agent, and perfluorooctyltriethoxysilane at a mass ratio of 100:2.5:3:1.5 , after melt-extruding at 285°C, casting on a cold drum at 25°C, and then biaxially stretching at 120°C, controlling the longitudinal stretch ratio to 5 times and the t...

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Abstract

The invention discloses a graphene in-situ grafted polyester film and a preparation method thereof. The preparation method comprises the following steps: with hydroxylated graphene and aminated graphene as modifiers, subjecting the hydroxylated graphene and the aminated graphene to condensation copolymerization with terephthalic acid and ethylene glycol so as to obtain a modified PET raw material,then blending the modified PET raw material with polyphenylene vinylene, a lotus leaf hydrophobic agent and perfluorooctyltriethoxysilane according to a mass ratio of 100: (0.5-2.5): (1-3): (0.5-1.5), and carrying out melt extrusion, cast casting and stretch molding; wherein a condensation reaction system comprises the following raw materials in percentages by mass: 6 to 10% of the hydroxylatedgraphene, 4 to 6% of the aminated graphene, 42 to 52% of the terephthalic acid, 36 to 38% of the ethylene glycol, 0.5 to 1% of a silane coupling agent, 0.5 to 1.5% of a stabilizer and 1 to 1.5% of a composite catalyst. According to the invention, graphene with a special functional group structure is utilized to generate a chemical cross-linking copolymerization reaction with a terephthalic acid monomer and an ethylene glycol monomer, and the graphene is introduced into a polyester molecular chain, so the graphene can maintain a stable and compatible state in a polyester system for a long term,and a polyester film can obtain permanent antistatic ability.

Description

technical field [0001] The invention belongs to the technical field of polyester film processing, and in particular relates to a graphene in-situ grafted polyester film and a preparation method thereof. Background technique [0002] Polyester film, referred to as PET film, is a film material made of polyethylene terephthalate as a raw material, which is made into a thick sheet by extrusion and then biaxially stretched. Polyester film is generally a colorless, transparent, glossy film with excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high and low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention It has good properties and is one of the commonly used barrier composite film substrates. [0003] Polyester film determines its electrical insulation due to its molecular characteristics, and its surface resistance reaches 10 14 -10 16 Ω, therefore, polyester film ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L65/00C08K5/526C08K5/5419C08J5/18C08G63/183C08G63/78C08K3/04
CPCC08G63/183C08G63/78C08J5/18C08J2367/02C08J2465/00C08K5/526C08K5/5419C08K3/042
Inventor 李刚
Owner 义乌海源塑料制品有限公司
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