第2凝固浴对气-液膜接触器用PVDF膜润湿性能的影响

发布时间：2018-06-12 09:03

本文选题：聚偏氟乙烯膜 + 第凝固浴　；参考：《水处理技术》2017年12期

【摘要】：以聚偏氟乙烯(PVDF)为基膜材料,以乙醇为第1凝固浴,以不同N-甲基吡咯烷酮(NMP)含量的水溶液为第2凝固浴,采用双凝固浴法制备了高疏水和高透气的PVDF膜。结果表明,以水作为凝固浴时,PVDF膜的空气侧较为平整,当用双凝固浴时,PVDF膜空气侧开孔结构和无皮层结构逐渐明显,PVDF膜基底侧较为粗糙;随着NMP含量的增大,膜的接触角先增大后减小,当第2凝固浴中的NMP的质量分数为50%时,接触角、最小液体渗透压力、通气量最大,分别为141.9°、35 kPa、540 L/h。
[Abstract]:High hydrophobic and breathable PVDF films were prepared by double solidification bath with polyvinylidene fluoride (PVDF) as the base membrane material, ethanol as the first coagulation bath and aqueous solution with different N-methylpyrrolidone (NMPN) content as the second coagulation bath. The results showed that the air side of PVDF membrane was flat when water was used as coagulation bath, and the air opening structure and non-cortical structure of PVDF membrane were obviously rough with the increase of NMP content. The contact angle of the membrane first increased and then decreased. When the mass fraction of NMP in the second coagulation bath was 50 kW, the contact angle, the minimum liquid osmotic pressure and the maximum aeration volume were 141.9 掳/ 35 KPA 540L / h, respectively.
【作者单位】：唐山学院环境与化学工程系;天津工业大学材料科学与工程学院;河北出入境检验检疫局检验检疫技术中心;
【基金】：河北省科技计划项目(13273707,16211243) 河北省唐山市科技计划项目(14130238B)
【分类号】：TQ051.893

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