论文部分内容阅读
采用邻苯二酚(CA)和γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)共沉积的方法对聚四氟乙烯(PTFE)平板膜进行亲水改性,通过SEM、ATR-FTIR和XPS对平板膜表面进行了表征,并对反应条件进行了优化,同时考察了膜的抗污染和耐水洗性能。结果表明,发现共沉积改性后的PTFE膜纤维变粗,表面出现了新的元素O和Si;随着KH560含量的增加,交联速度加快、亲水层变厚、膜表面的接触角减小,纯水通量先增加后减小;适当增加反应时间和升高温度能使反应更为充分;当KH560的质量浓度为2 g/L,反应时间为6 h、温度为35℃时,膜的性能最优。改性PTFE平板膜具有良好的抗蛋白质吸附能力,亲水层稳定性。
The polytetrafluoroethylene (PTFE) flat membrane was hydrophilized by co-deposition of catechol (CA) and γ-glycidoxypropyltrimethoxysilane (KH560). SEM, ATR-FTIR And XPS were used to characterize the surface of the flat membrane. The reaction conditions were optimized, and the anti-pollution and anti-washing properties of the membrane were investigated. The results show that the co-deposition modified PTFE membrane fibers become thicker, and new elements O and Si appear on the surface. With the increase of KH560 content, the cross-linking speed is accelerated and the hydrophilic layer thickens. The contact angle of the membrane surface decreases When the concentration of KH560 was 2 g / L, the reaction time was 6 h and the temperature was 35 ℃, the flux of pure water increased firstly and then decreased. The appropriate reaction time and temperature increased the reaction more adequately. Optimal film performance. Modified PTFE plate membrane has good anti-protein adsorption capacity, hydrophilic layer stability.