高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (10): 3218.doi: 10.7503/cjcu20210378

• 材料化学 • 上一篇    下一篇

中空多壳层TiO2填充对环氧树脂复合材料力学性能的影响

王鹏1,2, 毛丹1,2, 万家炜1,2(), 祁琪3, 杜江3, 王丹1,2()   

  1. 1.中国科学院过程工程研究所生化工程国家重点实验室, 北京 100190
    2.中国科学院大学, 北京 100049
    3.郑州大学河南省资源与材料工业技术研究院, 郑州 450001
  • 收稿日期:2021-06-03 出版日期:2021-10-10 发布日期:2021-10-10
  • 通讯作者: 万家炜,王丹 E-mail:jwwan@ipe.ac.cn;danwang@ipe.ac.cn
  • 基金资助:
    国家自然科学基金(21931012);中国科学院青年创新促进会基金(2020048)

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)

摘要:

为改善环氧树脂(EP)材料的力学性能, 采用次序模板法合成了TiO2中空多壳层结构(HoMS)材料, 利用偶联剂对获得的TiO2 HoMSs进行接枝改性后填充到EP中, 制备了TiO2 HoMSs/EP复合材料; 并与单壳层TiO2中空结构进行比较, 研究了壳层数和偶联剂改性对复合材料力学性能的影响规律. 结果表明, 随着壳层数的增加, 复合材料的力学性能增强, 并且偶联剂改性的TiO2 HoMSs可进一步提高复合材料的力学性能. 在该体系中, 经硅烷偶联剂KH-560改性后的三壳层TiO2 HoMSs(3S-TiO2 HoMSs)/EP复合材料的拉伸强度、 断裂伸长率和冲击强度可分别达到71.66 MPa, 7.4%和35.81 kJ/m2. 扫描电子显微镜(SEM)断面形貌表征结果显示, 相较于纯EP材料, TiO2 HoMSs/EP复合材料的断面更加粗糙, 说明TiO2 HoMSs材料起到了吸收外界应力和阻碍裂纹扩展的作用, 提高了复合材料的韧性, 提升了复合材料的冲击性能.

关键词: 中空多壳层结构, TiO2, 环氧树脂, 偶联剂, 力学性能

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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