Surface modification of hollow glass microsphere with different coupling agents for potential applications in phenolic syntactic foams |
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| Authors: | Chi Huang Zhixiong Huang Xuesong Lv Guangwu Zhang Qiong Wang Bo Wang |
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| Affiliation: | 1. Key Laboratory of Advanced Technology for Special Functional Materials of Ministry of Education School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China;2. Biomedical Research Institute Wuhan University of Science and Technology, Wuhan, China |
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| Abstract: | Modified hollow glass microsphere (HGM) particles have been prepared by surface treatment. Coupling agents such as γ‐aminopropyltriethoxysilane (APTES), di(dioctylpyrophosphato) ethylene titanate (NDZ‐311), and glutaraldehyde (GA) were used as modifiers to improve the hydrophobicity of HGM. Compared with pristine HGM, the modified HGM, especially the particles coupled with APTES‐GA, show better properties on flexural strength, fracture toughness, and dynamic mechanical properties of phenolic syntactic foams. It is revealed that the coupling agent coating layer grafted onto the surface of HGM reduces the polarity of particles, avoiding agglomeration of HGM in phenolic matrix and exhibiting good interfacial interaction between HGM and phenolic matrix. The remarkable improvement of interfacial adhesion between APTES‐GA modified HGM and phenolic matrix is mainly due to the covalent linkage with phenolic resin while the physical entanglement of molecular chains dominates the linkage between other modified HGM and phenolic matrix. APTES‐GA treatment is a more appropriate surface modification method for inorganic particle reinforced phenolic matrix composites. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44415. |
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| Keywords: | composites foams mechanical properties properties and characterization surfaces and interfaces |
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