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- 2016
KH-570接枝改性碳纤维/乙烯-醋酸乙烯共聚物复合泡沫材料的制备及表征
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Abstract:
采用浓H2SO4/浓HNO3混合酸对碳纤维(CF)进行表面氧化处理得到氧化碳纤维(OCF),再利用γ-甲基丙烯酰氧丙基三甲氧基硅烷(KH-570)与OCF进一步反应得到KH-570接枝改性碳纤维(KCF),随后将其应用于乙烯-醋酸乙烯共聚物(EVA)复合泡沫材料中。利用FTIR、XPS、Raman、FESEM和电子万能试验机等考察了碳纤维的表面改性效果以及碳纤维/EVA复合材料的结构与性能。结果表明:氧化和接枝反应均可以增加碳纤维表面的活性官能团含量和粗糙度,从而改善碳纤维与EVA基体之间的相容性,使碳纤维/EVA复合泡沫材料的物理性能得到改善。相同条件下,KH-570接枝改性碳纤维/EVA复合泡沫材料的物理性能更优异。 The oxidized carbon fibers(OCF) were prepared via surface oxidation treatment of carbon fibers(CF) in concentrated H2SO4/concentrated HNO3 blend acid, and then OCF were modified by silane coupling agent γ-methacryloxypropyl trimethoxy silane(KH-570), to obtain the KH-570 grafting modified carbon fibers(KCF), which were subsequently applied to ethylene-vinyl acetate copolymer(EVA) foamed composites. The surface modified characteristics, the structures and properties of carbon fiber/EVA composites were investigated by FTIR, XPS, Raman, FESEM and electronic universal testing machine etc. The result shows that both oxidation and grafting reaction can increase the content of active functional groups and roughness on surface of carbon fiber, which can improve the compatibility between carbon fibers and EVA matrix, leading to improvement on physical properties of carbon fiber/EVA foamed composites. Under the same conditions, the KH-570 grafting modified carbon fiber/EVA foamed composites have superior physical properties. 福建省科技计划(2015H0016);福州市科技计划(2013-G-92);福建省高校产学合作科技重大关键资助项目(2012H6008)
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