Two kinds of polypyrrole (PPy) particles doped with phosphate (PHA) or oxalic acid (OA) were in-situ synthesized on the surface of aramid Ⅲ fiber (F3 fiber),respectively.The as-prepared two types of PPy/F3 composites(PHA-PPy/F3 and OA-PPy/F3) were characterized by Digital Photo,SEM and FT-IR.The results shown that there were a large number of hydrogen bonding combination between PPy and F3 in addition to the physical adsorption effects between them.The electromagnetic properties of F3 fiber,PHA-PPy/F3 and OA-PPy/F3 were studied.The results indicated that the conductivities of the two types of PPy/F3 composites were increased by 15 orders of magnitude as compared to that of F3 fiber,and the dielectric loss and impedance matching effects of the two types of PPy/F3 composites were also significantly improved.Further investigation results on the microwave absorbing behaviors demonstrated that PPy/F3 composites shown obviously better absorption capabilities than F3 fiber.Among PPy/F3 composites,OA-PPy/F3 appeared a superior absorption performance than PHA-PPy/F3.
Li Kainan, Li Xiaodong, Hu Shuchun, Peng Tao, Jiang Yanman, Zhou Yu, Wang Xuyi, Zhou Wenjie
. In-situ synthesis of PPy on the surface of aramid Ⅲ fiber and its microwave absorbing property[J]. New Chemical Materials, 2020
, 48(8)
: 130
-136
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.08.028
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