用竹浆粕/离子液体复配体系纺制的再生纤维及其性能

为探究离子液体法制备再生纤维性能的影响因素,选用有机溶剂二甲基亚砜(DMSO)分别与离子液体1-烯丙基-3-甲基咪唑醋酸盐(AMIM]Ac)和1-丁基-3-甲基咪唑醋酸盐(BMIM]Ac)构成复配体系作为溶剂溶解竹纤维素浆泊,用湿法纺丝制备再生纤维素纤维,并借助扫描电子显微镜、热性能分析、X射线衍射等手段对再生纤维进行形貌、结构分析和力学性能测试。结果表明:当DMSO含量提高、纺丝原液中离子液体含量降低,再生纤维丝表面的光洁程度和热稳定性先提高后下降,力学性能下降;当竹纤维素含量提高,再生纤维丝的表面更光滑,结晶度、热稳定性、断裂强度提高,纤维直径均变粗;离子液体AMIM]Ac制得的再生纤维性能较优。

Properties of regenerated fibers from bamboo pulp/ionic liquid combined system

In order to explore the influencing factors of regenerated fiber properties by ionic liquid method,the bamboo cellulose pulp was dissolved in an ionic liquid mixture of 1-allyl-3-methylimidazolium chloride(AMIM]Ac),1-butyl-3-methylimidazolium chloride(BMIM]Ac)and the organic solvent of dimethyl sulfoxide(DMSO).The regenerated fiber was produced by wet spinning.The regenerated fiber was analyzed using electron microscopy,thermogravimetric analysis,X-ray diffraction and was tested for mechanical properties.The results show that when the DMSO content increases and the ionic liquid content in the spinning dope decreases,the smoothness of the surface and thermal stability of the regenerated fiber would first increase and then decrease,and the mechanical properties would decrease.As the content of bamboo cellulose pulp is increased,the surface of the regenerated fiber filament become smoother,and the crystallinity,thermal stability,breaking strength and fiber diameter are increased.The regenerated fiber made from ionic liquidAMIM]Ac has proven to offer improved performance.