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Erschienen in: Journal of Polymer Research 11/2023

01.11.2023 | Original Paper

Preparation and characterization of polysilazane-based thermal protective coating for CFRP

verfasst von: Zhaoyang Fan, Chao Xiong, Junhui Yin, Youchun Zou, Xiujie Zhu

Erschienen in: Journal of Polymer Research | Ausgabe 11/2023

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Abstract

As an excellent ceramic precursor, polysilazane could be cured at low temperatures, which provided a possibility for the preparation of thermal protective coatings for carbon fibers reinforced polymer (CFRP) composites. Hollow glass microspheres with low thermal conductivity were introduced into coatings. Meanwhile, the thermal protection effect of coatings was further enhanced. The dispersion and stability of hollow glass microspheres in polysilazane resin were improved by alkali treatment and grafting coupling agent. Results showed that the stability could be maintained within 2 h, which was feasible in engineering applications. Static thermal tests and hygrothermal aging tests were designed to evaluate the thermal insulation effect of the coating. After 10 min of heat assessment in air atmosphere, the three-point bending performance of coated samples was better than that of uncoated samples. The protection effect was more obvious when the test temperature was higher than the glass transition temperature of carbon fibers reinforced epoxy composites. The bending strength of the coated sample at 270 °C was 743.9 ± 11.9 MPa, which was higher than that of the uncoated sample at 210 °C (743.4 ± 22.3 MPa). According to the result of 5 cycles hygrothermal aging test, the negative effect of acid environments was greater than that of alkali or water. Dynamic thermomechanical analyzer results showed that the coating effectively prevented the damage of water, alkali, or acid environments on the epoxy resin. The above results indicated that the existence of polysilazane and hollow glass microsphere coating systems could further expand the high-temperature application of CFRP.

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Literatur
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35.
Metadaten
Titel
Preparation and characterization of polysilazane-based thermal protective coating for CFRP
verfasst von
Zhaoyang Fan
Chao Xiong
Junhui Yin
Youchun Zou
Xiujie Zhu
Publikationsdatum
01.11.2023
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 11/2023
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-023-03814-3

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