有机硅添加剂对热处理粘胶纤维结构和性能的影响

The effect of organosilicone additive on the structure and properties of heat-treated rayon fibers

借助XPS、SEM等研究了有机硅添加剂对热处理粘胶纤维的结构和性能的影响。结果表明:浸渍有机硅添加剂的粘胶纤维在热处理时,由于有机硅具有耐高温、防粘连,憎水、化学稳定性好等特性,对纤维表面可以起到保护作用;使其在热处理后,表面空洞减少,纤维的分线性得到改善,从而提高了它的抗拉强度。当有机硅添加剂的质量分数为4.79%时,所获炭纤维抗拉强度的增加幅度高达126.3%。浸渍有机硅添加剂的粘胶纤维在热处理后,S i元素主要以S iO2形式存在于纤维表面。

Rayon fibers were impregnated by an organosilicone additive followed by heat treatment and the structure and properties were investigated. Results show that strength of the heat-treated rayon fibers impregnated by the organosilicone was improved The number of pores in the resulting carbon fibers was decreased and the separability of filaments was improved because the organosilicone may protect the surface of the fibers during heat-treatment by virtue of its heat-resistant, non-conglutination, hydrophobic nature and chemical inertness. When the loading of the organosilicone additive on the rayon fibers was 4.79 w/%, the tensile strength of the resulting carbon fibers was increased by 126.3 %. The organosilicone additive was decomposed to form SiO2 after heat treatment.