Carbon-bonded carbon fiber composites containing uniformly distributed silicon carbide
Carbon-bonded carbon fiber composites containing uniformly distributed silicon carbide
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DOI：
10.1039/c3ra44913k
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发表时间：
2014-01
期刊：
影响因子：
3.9
通讯作者：
Xinghong Zhang;Baosheng Xu;C. Hong;Jiecai Han;F. Qin;W. Han;Haiming Cheng;Chen Liu;R. He
中科院分区：
文献类型：
--
作者：
Xinghong Zhang;Baosheng Xu;C. Hong;Jiecai Han;F. Qin;W. Han;Haiming Cheng;Chen Liu;R. He
采用新型的分散絮凝法制备了具有均匀微观结构的SiC颗粒的碳结合碳纤维复合材料。以聚乙烯亚胺（PEI）为分散剂，聚丙烯酰胺（PAM）为分散剂，将混合酚醛树脂（Pf）、SiC颗粒和短切碳纤维（Cf）均匀共混。加入0.6wt%的PEI和0.8wt%的PAM可获得均匀分布的SiC颗粒包覆CBCF。研究了PEI和PAM含量对SiC改性CBCF微观结构、浆料流变性和稳定性的影响。与未改性CBCF相比，SiC改性CBCF的压缩强度和压缩模量均有所提高。这种简单而通用的方法可用于制备大规模和改性的CBCF。
Carbon-bonded carbon fiber composites (CBCFs) containing SiC particles with uniform microstructure were produced using an innovative dispersion and flocculent approach. The mixed phenolic (Pf), SiC particles and chopped carbon fibers (Cf) were blended uniformly using polyethyleneimine (PEI) as a dispersant and polyacrylamide (PAM) as a flocculating agent. A homogeneous distribution of SiC particles coated CBCFs was obtained with the addition of 0.6 wt% PEI and 0.8 wt% PAM. The effect of PEI and PAM content on the microstructure, slurry dispersibility and stability of SiC-modified CBCFs was investigated. The compressive strength and compression modulus of the SiC-modified CBCFs were improved compared with unmodified CBCFs. This simple and versatile approach can be used to prepare large-scale and modified CBCFs.