碳纤维表面性能的研究

通过此表面、接触角、浸润性、表面能和表面基团的测定,本文较系统地研究了碳纤维表面性能。结果表明经处理后的碳纤维表面的浸润性、此表面、表面能与表面基团含量都增加。就浸润性而论,不论对环氧或水的接触角都随氧化处理时间增加而减少,浸润速度随氧化处理而上升,表面能随氧化处理而提高。特别是表面能中极性组份增加得较为显著,这与表面基团分折结果表明表面含氧极性基团随氧化时间增加而增加的结论是相一致的。另外表面基团含量化学分析的结果与XPS分析的结果基本上一致,因此可以用XPS表面基团分析来代替烦杂的化学分析方法。 

STUDIES ON THE PROPERTIES OF CARBON FIBER SURFACE

Carbon fiber surface properties were systematically studied by means of measuring specific surface, contact angle, wettability surface energy and surface group.Specific surface measured bY dynamic absorption method, increased with the oxidation treatment time, rose from carbon fibers etched bY acid.The most probable pore distribution of carbon fibers tested is in the scope 10-12Å.The changes of surface energy were measured by contact goniometer and increased with oxidation treatment time too.There were the dispersion and polar components of surface energy in which the polar components increased obviously and the dispersion tomponents decreased slightly.The contact angles with respect to epoxy resin or water decreaseed witn the oxidation treated time.The treatment modified the wettabilities of treated fibers toward better ones.Then, changes of wetting velocity of carbon fibers were measured by microbalance.The wetting velocity in water increased about 3 times of ter the oxidattion treament of carbon fibers, which further verified that the wettabilites became better by oxidation treatment.