采用溶液喷射纺丝技术制备了间位芳纶(PMIA)纳米纤维,探讨了溶液浓度、气压、挤出速率和接收距离等参数对纤维形貌和直径的影响,结果表明,在溶液浓度为12％(质量分数)、牵伸风压为0．12 MPa、挤出速率为0．8 mL/h、接收距离为40 cm条件下,所得 PMIA 纳米纤维形貌较好,纤维平均直径可达276．7 nm；采用高速旋转滚筒,制备了PMIA取向纳米纤维,讨论了滚筒转速对PMIA纤维膜性能的影响.结果表明,随着滚筒转速提高,纤维膜取向度及其力学性能均提高,1300 r/min 时达到最大值,而膜的孔隙率则随着转速的提高逐渐减小,但仍可达79．7％以上.
PMIA nanofibers were successfully prepared by solution blow spinning.The effect of spinning parame-ters,including PMIA solution concentration,gas pressure,injection rate and receiving distance on the morphol-ogy and nanofibers diameter were investigated.The results showed that PMIA nanofibers had good surface mor-phology and fine fibre diameter (276.7 nm)when solution concentration,gas pressure,injection rate and re-ceive distance are 12wt%,0.12 MPa,0.8 mL/h and 40 cm,respectively;Aligned PMIA nanofibers were pre-pared using a high rotating cylinder as acollector.The effect of rotating speed on PMIA nanofibers membrane performance was studied.The results indicated that orientation degree of nanofibers and the mechanical proper-ties all increased as the rotating speed was raised.The peak values appeared in 1 300 r/min and then decreased over 1 300 r/min.Furthermore,the porosity of membrane decreased when the rotating speed was raised but the porosity was still higher than 7 9 .7%.
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