Surface modification of graphene for use as a structural Fortifier in water-borne epoxy coatings
Artikel i vetenskaplig tidskrift, 2019

Graphene, the typical two-dimensional sp2 hybridized carbon allotrope, is widely used as a filler for improving the mechanical performance of polymers. However, its superhydrophobic surface makes it a big challenge to obtain stable graphene dispersions, especially in water-borne systems. On the contrary, graphene oxide (GO) shows excellent dispersibility in water, but strong oxidants and acids destroy its structure and degrade its mechanical properties. This largely limits its application in water-borne coatings. In this work, graphene from mechanical exfoliation was surface modified by p-aminophenol derived diazonium salt to achieve a homogenous dispersion. Moreover, the hydroxyl groups in p-aminophenol are able to combine with epoxy resins during the curing process to improve mechanical performance of the final coatings. The result shows that functionalized graphene shows a lower coefficient of friction and better abrasion resistance compared to GO.

Water-borne epoxy

Functionalized graphene

Tribological properties

Författare

Ya Liu

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Fudan University

Chao Xia

Applied Nano Surfaces Sweden AB

Abdelhafid Zehri

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

L. Ye

SHT Smart High-Tech

Nan Wang

SHT Smart High-Tech

Boris Zhmud

Applied Nano Surfaces Sweden AB

Hongbin Lu

Fudan University

Johan Liu

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Shanghai University

Coatings

20796412 (eISSN)

Vol. 9 11 754

Ämneskategorier

Polymerkemi

Polymerteknologi

DOI

10.3390/coatings9110754

Mer information

Senast uppdaterat

2020-11-10