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以二氯甲烷/丙酮为溶剂,借助高挥发溶剂的制孔性,通过静电纺丝技术制备二醋酸纤维素多孔超细纤维。探讨了溶剂配比、溶液浓度对多孔超细纤维形貌的影响。通过扫描电镜观察纤维形貌,通过电导率仪测试纺丝液电导率,运用黏度计测试纺丝液黏度。结果表明,溶剂配比和溶液浓度是影响纤维形貌的重要因素。二氯甲烷体积比例由90%降低到30%的过程中,形貌由“柱状纤维”过度到“带状纤维”最终生成“颗粒状”。溶液浓度由2%(wt,质量百分数,下同)上升到5%时,形貌由“颗粒状”变为“带状纤维”最终生成有粗节的“柱状纤维”。
The cellulose diacetate porous ultrafine fibers were prepared by electrospinning technique with methylene chloride / acetone as solvent and the porosity of highly volatile solvents. The effects of solvent ratio and solution concentration on the morphology of porous ultrafine fibers were investigated. The morphology of the fiber was observed by scanning electron microscopy. The conductivity of spinning solution was measured by conductivity meter. The viscosity of spinning solution was measured by viscometer. The results show that solvent ratio and solution concentration are the important factors affecting the fiber morphology. In the process of decreasing the volume fraction of dichloromethane from 90% to 30%, the morphology changes from “columnar fibers” to “ribbon fibers” to “granules”. When the concentration of the solution is increased from 2% (wt,% by mass) to 5%, the morphology changes from “granule ” to “ribbon fiber ” .