DataVXScience and Engineering of Composite MaterialsPaper
journal article·2019-01-28Open access

Influence of nano-SiO 2 on the bonding strength and wear resistance properties of polyurethane coating

Fangfang Wang, Lajun Feng, Huini Ma, Zhe Zhai, Zheng Liu

Science and Engineering of Composite Materials· Volume 26· Issue 1
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Abstract

Abstract To improve the wear resistance of polyurethane (PU) coating and its adhesion to the steel substrate, a series of simple and practicable techniques were designed to mix nano-SiO 2 with PU powder to cast a coating layer onto the steel. When the addition of nano-SiO 2 was small, a network structure of PU-SiO 2 was produced. It improved the wear resistance of the composite coating and its adhesion to the steel substrate. When the addition of nano-SiO 2 was excessive, agglomerated nano-SiO 2 particles not only affected the bond between the PU resin and the steel substrate but also became abrasive materials, intensifying the abrasion of the composite coating during friction. It resulted in lower bonding strength and poorer wear resistance of the composite coating. The wear rate and friction coefficient of 2 wt.% SiO 2 /PU composite coating were 1.52×10 −6 cm 3 /min N and 0.31, respectively. Its wear resistance was about 10 times as high as that of the pure PU coating. Furthermore, a simple and practicable installation was designed to test the bonding strength between the coating and the steel substrate. The bonding strength between 2 wt.% SiO 2 /PU composite coating and the steel substrate was 7.33 MPa, which was 39% higher than that of the pure PU coating.
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Research context

Metals & alloysComposites

OpenAlex topics: Tribology and Wear Analysis · Polymer Nanocomposites and Properties · Polymer composites and self-healing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering , Xi’an University of Technology , Xi’an 710048, Shaanxi , China

Key Laboratory of Corrosion and Protection of Shaanxi Province , Xi’an 710048, Shaanxi , China

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