木质素碱催化苯酚液化物纤维固化工艺

以木质素碱催化苯酚液化物为原料,加入六次甲基四胺后熔融纺丝,将熔纺纤维置于甲醛和盐酸混合溶液中固化处理制得固化纤维,研究了碱存在条件下木质素苯酚液化物的成纤性及初生纤维固化条件。结果表明:木质素碱催化苯酚液化物具有很好的成纤性;所得纤维性能与纺丝条件和固化工艺相关。在收丝辊转速450r/min、压力0.02 MPa、固化液盐酸质量分数15%、甲醛质量分数18.5%、固化温度95℃、升温速率10℃/h、固化时间4 h条件下,所得纤维性能较好,适于制备碳纤维。

Fiber-forming process of base-catalyzed liquid mixture of lignin and phenol

The cured fiber was prepared from base-catalyzed lignin and phenol liquid by curing process of mixture formaldehyde and hydrochloric acid after melt spinning with the hexamethylene tetramine.Fiber forming ability of the liquid and the curing conditions of the spun fiber were studied.Base-catalyzed lignin and phenol liquid show a good ability for fiber forming.The properties of resultant fiber are related to the melting spinning conditions and curing process.The fiber with properties suitable for preparation of carbon fiber was obtained under the condition as follows:the winding speed of collector was 450 r/min and the pressure was 0.02 MPa,the concentration of hydrochloric acid liquid and formaldehyde in the curing mixture was 15% and 18.5%,respectively,and curing temperature was 95 ℃ with heating rate of 10 ℃/h and curing time of 4 h.