Fabrication of Polyurethane/Laponite/Graphene Transparent Coatings with High Surface Hardness

Author:

Jiao Tianqi12,Shui Linyi2,Lin Ming2,Huang Wenhao2,Chen Guohua2ORCID

Affiliation:

1. School of Chemical Engineering, Huaqiao University, Xiamen 361021, China

2. School of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China

Abstract

A polyurethane/Laponite/graphene transparent coating with high surface hardness, obtained by dispersing the Laponite–graphene oxide (Lap-GO) in polyurethane for UV reduction, is reported. Lap-GO improves the hardness of the coating, where Laponite is intercalated between graphene layers through electrostatic action, preventing the re-accumulation or aggregation of graphene and ensuring the transparency of the coating. The analysis of pencil hardness and light transmittance shows that when the Lap-GO content is 0.05 wt‰ and the UV reduction is 10 min, the hardness of the coated pencil increases to 5H, and the light transmittance remains above 85%. Furthermore, the polyurethane/Laponite/graphene transparent coating also has excellent cold liquid resistance and meets specific usage standards. The prepared polyurethane/Laponite/graphene transparent coatings are promising for broad application prospects in cover and protective coatings.

Funder

Graphene Powder & Composite Research Center of Fujian Province

Xiamen Key Laboratory of Polymers & Electronic Materials

Publisher

MDPI AG

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces

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