Microstructure and properties of functionalized Al2O3@SiO2/phenolic epoxy-bismaleimide composites

CHEN Yufei; ZHAO Hui; DONG Lei

doi:10.13801/j.cnki.fhclxb.20210316.002

Volume 39 Issue 1

Jan. 2022

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CHEN Yufei, ZHAO Hui, DONG Lei. Microstructure and properties of functionalized Al2O3@SiO2/phenolic epoxy-bismaleimide composites[J]. Acta Materiae Compositae Sinica, 2022, 39(1): 126-133. doi: 10.13801/j.cnki.fhclxb.20210316.002

Citation:

CHEN Yufei, ZHAO Hui, DONG Lei. Microstructure and properties of functionalized Al₂O₃@SiO₂/phenolic epoxy-bismaleimide composites[J]. Acta Materiae Compositae Sinica, 2022, 39(1): 126-133. doi: 10.13801/j.cnki.fhclxb.20210316.002

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Microstructure and properties of functionalized Al₂O₃@SiO₂/phenolic epoxy-bismaleimide composites

doi: 10.13801/j.cnki.fhclxb.20210316.002

CHEN Yufei^{1, 2
,
,},
ZHAO Hui¹,
DONG Lei¹

1.
College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
2.
Key Laboratory of Engineering Dielectrics and its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China

Received Date: 2021-01-26
Accepted Date: 2021-03-09
Rev Recd Date: 2021-03-01

Available Online: 2021-03-17

Publish Date: 2022-01-15

Abstract

Abstract

The Al₂O₃ and SiO₂ were obtained by sol-gel method and the KH560-Al₂O₃@SiO₂ were prepared with KH560 as the coupling agent. The KH560-Al₂O₃@SiO₂/MBMI-EPN composites were prepared by in-situ polymerization, using bismaleimide resin and phenolic epoxy resin (MBMI-EPN) as matrix, KH560-Al₂O₃@SiO₂ as the reinforcement and 4’4-diaminodiphenylmethane (DDM) as curing agent. The micro-structure of KH560-Al₂O₃@SiO₂ were characterized and the effect of the reinforcement on properties of composites were studied. The results show that the Al₂O₃@SiO₂ particles have clear core-shell structure. The short-fiber Al₂O₃ is inner core, and the amorphous SiO₂ is outer shell, which are connected by chemical bonds. The KH560 is successfully grafted onto the surface of Al₂O₃@SiO₂, and the particles packing phenomenon is weakened. The micro-structure of the composites shows that KH560-Al₂O₃@SiO₂ forms a multi-phase structure in the MBMI-EPN matrix with good dispersion and stable interface. The cross-sectional shape is fish scale, and there are no Al₂O₃@SiO₂ nanoparticle agglomerates and the overall structure is regular. When the content of KH560-Al₂O₃@SiO₂ is 1.5wt%, bending strength and impact strength of the composites are 126 MPa and 14.7 kJ/m², which are 21.2% and 27.8% higher than resin matrix, respectively. And the thermal decomposition temperature of the composites is 392.3℃, which is 14.5℃ higher than that of resin matrix.
- phenolic epoxy resin,
- bismaleimide,
- alumina, silicon oxide,
- mechanical properties,
- heat resistance,
Long Abstrsct
Innovation Points

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References(20)

References

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