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High-scratch-resistance abrasion-resistant coating material and preparation method thereof

A coating material and wear-resistant technology, applied in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve problems such as brittleness, hardness and easy cracking, high cross-linking density of coatings, and poor scratch resistance, so as to improve elasticity Effects of resilience, avoidance of scratch damage, and failure damage

Inactive Publication Date: 2017-05-31
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, pure polysiloxane coating materials have problems such as excessive crosslinking density, increased internal stress, brittleness and cracking, and poor scratch resistance due to the continuous hydrolysis and condensation reaction in the later stage.

Method used

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  • High-scratch-resistance abrasion-resistant coating material and preparation method thereof
  • High-scratch-resistance abrasion-resistant coating material and preparation method thereof
  • High-scratch-resistance abrasion-resistant coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 1 g of graphene oxide into 500 mL of N,N dimethylformamide solvent, stir and disperse at 60°C for 2 hours. The uniformly dispersed mixed solution was transferred to a 1000 mL three-necked flask equipped with a mechanical stirrer, a reflux condenser, and a constant pressure dropping funnel. Add 2.4 g of hexadecyl isocyanate into the reaction solution, and mechanically stir at 60° C. for 24 hours to obtain a modified graphene dispersion. The product was then isolated by suction filtration and washed 3 times with acetone / deionized water respectively. The product was dried at 60°C for 12 hours to obtain modified graphene.

Embodiment 2

[0064] Add 1 g of graphene oxide into 25 mL of dimethyl succinate and 25 mL of dimethyl glutarate solvent, and disperse with solvent heating in a pressure reactor at 160° C. for 2 hours. The uniformly dispersed mixed solution was transferred to a 1000 mL three-necked flask equipped with a mechanical stirrer, a reflux condenser, and a constant pressure dropping funnel. Add 4 g of cetyl isocyanate into the reaction solution, reflux and stir at 100° C. for 12 hours, then add 5 g of hydrazine hydrate and continue the reaction for 12 hours to obtain a modified graphene dispersion. The product was then isolated by suction filtration and washed 3 times with acetone / deionized water respectively. The product was dried at 60°C for 12 hours to obtain modified graphene.

Embodiment 3

[0066] Add 1g of graphene oxide into 50mL of water, 50mL of ethanol, 50mL of acetone, and 50mL of butyl acetate mixed solvent, add 1g of ammonia water, 0.3g of dispersant (BKY190), and ultrasonically disperse at room temperature for 0.5 hours. The uniformly dispersed mixed solution was transferred to a 1000 mL three-necked flask equipped with a mechanical stirrer, a reflux condenser, and a constant pressure dropping funnel. Add 2 g of methacrylic acid, 2 g of vinyl sulfonic acid, and 0.2 g of potassium persulfate into the reaction solution, reflux and stir at 90°C for 24 hours, then add 0.1 g of sodium borohydride and continue the reaction for 12 hours to obtain a modified graphene dispersion . The product was then isolated by suction filtration and washed 3 times with acetone / deionized water respectively. The product was dried at room temperature for 48 hours to obtain modified graphene.

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Abstract

The invention provides a high-scratch-resistance abrasion-resistant coating material and a preparation method thereof. The preparation method comprises the following steps: modifying the graphene surface by using active groups by a chemical modification technique to obtain modified graphene, and blending the modified graphene with polysiloxane to obtain the high-scratch-resistance abrasion-resistant nano composite coating material. The surface modification is carried out to enhance the dispersity of the graphene and the interactions between the graphene and polysiloxane matrix, thereby enhancing the mechanical properties of the coating. No pigment or filler is added. The scratch resistance of the transparent graphene / polysiloxane composite coating is enhanced by 140% or above, and the abrasion loss is reduced by 60% or above. The transparent graphene / polysiloxane composite coating has excellent adhesion, heat resistance, weather resistance, flame retardancy and corrosion resistance. The graphene / polysiloxane composite coating can be used for surface protection and shielding of various metals, plastics, wood, concrete, glass and other substrates, and is applicable to the fields of automobile paints, photoelectric materials, precision instruments, marine heavy-corrosion protection, buildings and the like.

Description

technical field [0001] The invention relates to the fields of chemical industry and optoelectronics, in particular to a highly scratch-resistant and wear-resistant coating material and a preparation method thereof. Graphene / polysiloxane composite coating materials can be applied to the surface protection and protection of various metals, plastics, wood, concrete, glass and their mixed substrates. The addition of graphene can improve the mechanical properties of the coating such as resistance Abrasion and scratch resistance, water resistance, heat resistance, flame retardancy, weather resistance, antistatic, corrosion resistance. Background technique [0002] With the development of the economy and the improvement of people's living standards, the protective effect of coating materials has been paid more and more attention. The surface coatings of building materials, automobiles, marine facilities, instruments and equipment are vulnerable to human impact, sandstone, washing ...

Claims

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Application Information

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IPC IPC(8): C09D183/06C09D183/04C09D167/00C09D175/04C09D161/32C09D5/18C09D5/08C09D7/12C09D4/06
CPCC09D183/06C08K3/04C08K9/04C08K9/06C08L2201/02C08L2201/08C08L2205/03C08L2205/035C09D4/06C09D5/08C09D5/18C09D7/62C09D7/65C09D161/32C08L61/32C08L63/00C08L33/00C08L67/00C08L75/04C08K13/06C08K3/36
Inventor 游波胡航李滨
Owner FUDAN UNIV
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