针叶树材木质素基碳纤维的力学性能

来源 :The 11th China-Japan joint conference on Composite Materials | 被引量 : 0次 | 上传用户：aqxielin

【摘要】

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【作者】

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林剑赵广杰浦木康光

【机构】

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北海道大学大学院农学研究院,札幌060-8589 北京林业大学材料科学与技术学院,北京100083

【出处】

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The 11th China-Japan joint conference on Composite Materials

【发表日期】

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2014年3期

【关键词】

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针叶树材木质索化学固化六次甲基四胺碳纤维力学性能

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　　为提高针叶树材木质素基碳纤维的力学性能,通过熔融纺丝法制备的聚乙二醇木质素纤维先经过85℃的lHC1与C6H12N4混合水溶液化学固化lh,再在空气氛围中以一定的升温速率从室温加热至250℃氧化热稳定处理,制备得到无表面缺陷的不熔融纤维和经碳化后的碳纤维.研究表明,在化学固化过程中,由ChH12N4分解得到的甲醛分子在木质素分子中的苯环之间形成亚甲基键连接,提高了水质索分子的交联程度,并且在纤维表面没有观察到裂痕等缺陷；化学固化后的木质素纤维在空气中氧化热稳定处理时最高可承受2℃/min的升温速率,并且聚乙二醇木质素纤维不熔融处理时间缩短至3h；碳化得到的碳纤维最高抗拉强度约为700MPa,是具有表面缺陷的聚乙二醇木质索基碳纤维的1.5倍,也基本等l司于目前为止具有最高力学性能的木质素基碳纤维的抗拉强度.

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