【作者】 赵瑾； 徐樑华； 李春喜； 王子镐；

【Author】 Zhao Jin,Xu Lianghua,Li Chunxi,Wang Zihao (College of Chem.Eng.,Inst.of Carbon Fiber & Composite, Beijing Univ.of Chem.Tech.,Beijing 100029)

【机构】 化学工程学院； 北京化工大学碳纤维及复合材料研究所；

【摘要】 建立了聚合物细丝内DMSO溶剂的含量由80%降低至20%的扩散脱溶过程模型。采用数值方法计算了溶剂表观扩散系数为1×10^-10m²·s^-1和1×10^-12m²·s^-1两种情况下溶剂在细丝内的径向浓度分布曲线随时间的变化情况。结果表明,该模型可用于高分子细丝内溶剂脱除的过程模拟,结果可靠,采用1×10^-12m²·s^-1的表观扩散系数得到的平衡脱溶时间与实验停留时间符合良好。更多还原

【Abstract】 A model is established for the diffusion process of DMSO in a polymer thread from solvent content of 80%to 20%.The model is solved via numerical method with respect to the radial distribution of DMSO solvent inside the thread at specified time under apparent diffusion coefficients of DMSO being 1×10^-10 m² ? s^-1 and 1×10¹² m² ? s^-1.The results indicate that the present model can be used to simulate the solvent removal process inside a polymer thread with good reliability. And the diffusion equilibrium time calculated under apparent diffusion coefficient of 1×10^-12 m²·s^-1 agrees well with the experimental residence time of the thread in the washing tank.更多还原