【摘 要】
：
在聚丙烯腈原丝生产过程中,水洗对原丝的结构和性能有重要影响。研究了不同水洗条件下残留DMSO的溶出规律,通过Fick定律建立了溶剂的扩散数学模型,得到不同条件下的扩散系数
【机 构】
：
中国科学院炭材料重点实验室中国科学院山西煤炭化学研究所,中国科学院研究生院,
论文部分内容阅读
在聚丙烯腈原丝生产过程中,水洗对原丝的结构和性能有重要影响。研究了不同水洗条件下残留DMSO的溶出规律,通过Fick定律建立了溶剂的扩散数学模型,得到不同条件下的扩散系数值,并且通过实验值对其进行修正。借助压汞法考察了不同水洗条件下丝条的孔隙结构参数变化,结果表明:丝条中存在着丰富的微孔,超声波的加入使丝条平均孔径减小。孔结构的变化改变扩散系数,孔隙率增大时扩散系数增大。
In the production of polyacrylonitrile yarn, water washing has an important influence on the structure and properties of the precursor yarn. The dissolution rules of residual DMSO under different water washing conditions were studied. The diffusion mathematical model of solvent was established by Fick’s law. The diffusion coefficient values under different conditions were obtained and corrected by experimental values. The changes of pore structure parameters under different water washing conditions were investigated by mercury intrusion method. The results showed that there are many pores in the yarn, and the average diameter of the yarn decreases with the addition of ultrasonic wave. The change of pore structure changes the diffusion coefficient, and the diffusion coefficient increases as the porosity increases.
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