采用静电纺丝法制备聚丙烯腈(PAN)纳米纤维膜,对其进行表面亲水改性,制备出内部疏水、表面亲水的正渗透膜,解决了亲水性纤维在水中高度膨胀导致正渗透膜机械性能大幅下降的问题,考察了水解时间对PAN纳米纤维膜亲水性以及机械性能的影响。研究表明,水解时间为30min时,纳米纤维膜表面基本完全水解,具有较好的表面亲水性能,且内部结构未被破环,保留了原有的机械性能。用PAN纳米纤维膜作为支撑层制备的正渗透膜具有良好的通量和较低的结构系数,且在水中不易膨胀、机械性能良好。
Polyamide nanofiber mat was prepared by electrospinning and then conducted with the surface modification.Hydrophobic polyamide was selected due to high degree swelling of hydrophilic nanofibers in hydrographic environment damaged the strength and structural integrity of fiber.The technological parameter was adjusted to make the hydrophilic surface of nanofiber in order to enhance the water permeability and reduced the internal concentration polarization.The results showed that when the hydrolytic treatment conducted 30min,the surface of nanofiber presented hydrophilic and the internal structure as well as mechanical strength was intact.High water permeability and low structural coefficient was obtained in this way,meanwhile,the fiber swelling was avoid.
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基金资助
国家自然科学基金(11575126);天津市自然科学基金(16JCZDJC36400)
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