Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (10): 3218.doi: 10.7503/cjcu20210378

• Materials Chemistry • Previous Articles     Next Articles

Effect of Hollow Multi-shelled TiO2 on Mechanical Properties of Epoxy Resin Composites

WANG Peng1,2, MAO Dan1,2, WAN Jiawei1,2(), QI Qi3, DU Jiang3, WANG Dan1,2()   

  1. 1.State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.Henan Province Industrial Technology Research Institute of Resources and Materials,Zhengzhou University,Zhengzhou 450001,China
  • Received:2021-06-03 Online:2021-10-10 Published:2021-10-10
  • Contact: WAN Jiawei,WANG Dan E-mail:jwwan@ipe.ac.cn;danwang@ipe.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(21931012);the Foundation of the Youth Innovation Promotion Association of Chinese Academy of Sciences(2020048)

Abstract:

In order to improve the mechanical properties of epoxy resin(EP), TiO2 hollow multi-shelled structures (HoMSs) were synthesized by sequential templating approach, and then coupling agents were used to graft the obtained HoMSs. After that, the modified TiO2 HoMSs were filled into the EP to prepare TiO2 HoMSs/EP composites, which were compared with single-shelled TiO2/EP composites. The effects of shell number and coupling agent modification on the mechanical properties of the composites were studied. It is demonstrated that the mechanical properties of the composites increase as the number of shells increases, and can be further improved by modifying TiO2 HoMSs with coupling agents. The tensile strength, elongation at break and impact strength of silane coupling agent KH-560 modified triple-shelled TiO2 HoMSs/EP composites can reach 71.66 MPa, 7.4% and 35.81 kJ/m2, respectively. Scanning electron microscopy(SEM) images exhibit that the TiO2 HoMSs/EP composites possess the rougher cross section than that of pure EP, which illustrates that HoMSs can absorb the external stress and hinder the crack propagation to improve the toughness of the composites and enhance the impact strength of the composites.

Key words: Hollow multi-shelled structure, TiO2, Epoxy resin, Coupling agent, Mechanical property

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