Effect of boehmite nanorods on the properties of glycidoxypropyl-trimethoxysilane (GPTS) hybrid coatings |
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Authors: | Quan Chen Jason Gim Hong Tan Shou Cang Shen Yu Chan Liu Wai Kiong Ng Xian Ting Zeng |
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Institution: | (1) Singapore Institute of Manufacture Technology, 71 Nanyang Drive, Singapore, 638075, Republic of Singapore;(2) Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore, 627833, Republic of Singapore |
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Abstract: | AlOOH boehmite nanorods, synthesized by a solid-based process, were incorporated into a sol–gel coating in which GPTS was
used as a precursor. Transparent composite coatings with nanorod content up to 40 wt% were obtained by spin coating the sol–gel
mixture on glass substrates. Nanorods in the coating were found be aligned parallel to the substrate surface. Mechanical properties,
such as modulus and hardness of the nanorod filled coating, were slightly lower than coatings of the same composition but
filled with commercially available nanosized boehmite particles. However, crack toughness was greatly improved, as supported
by nanoindentation test results. The improvement in crack toughness was attributed to the high aspect ratio of the rigid nanorods,
in addition to the fact that the nanorods were aligned within the composite parallel to the surface. |
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Keywords: | Boehmite Nanorod Nanoparticle Glycidoxypropyl-trimethoxysilane Spin coating Composite |
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