七通道中空纤维超滤膜的制备与性能调控
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摘要
以聚醚酰亚胺(PEI)为膜材料、N,N-二甲基乙酰胺为溶剂、水为凝固浴,采用干-湿相转化法制备七通道中空纤维超滤膜,研究了PEI含量和3种添加剂γ-丁内酯、聚乙二醇600(PEG600)、聚乙烯吡咯烷酮-K30对膜结构和性能的影响。结果表明,随着PEI含量升高,膜断面由指状孔向海绵状孔转化,拉断力和爆破压力大幅提升。以PEG600为添加剂时膜具有最佳的综合性能,拉断力为16.55 N,纯水通量为247.39 L/(m~2·h),对牛血清白蛋白的截留率达93.9%。
A novel seven-channel hollow fiber membrane was fabricated via dry-wet phase separation method using polyetherimide(PEI) as membrane material, N,N-dimethylacetamide as solvent and tap water as coagulation bath. The effect of PEI content and three additives including γ-butyrolactone,polyethylene glycol 600(PEG600) and polyvinylpyrrolidone K-30 on membrane structure and performance were investigated. The results showed that,the cross-section morphology transferred from finger-liked to sponge-liked, the breaking load and burst pressure improved dramatically with the increase of PEI content. In addition, PEG600 exhibited the best performance among three additives, the breaking load of membrane was 16.55 N, the water flux and bovine serum albumin rejection were 247.39 L/(m~2·h) and 93.9%, respectively.
A novel seven-channel hollow fiber membrane was fabricated via dry-wet phase separation method using polyetherimide(PEI) as membrane material, N,N-dimethylacetamide as solvent and tap water as coagulation bath. The effect of PEI content and three additives including γ-butyrolactone,polyethylene glycol 600(PEG600) and polyvinylpyrrolidone K-30 on membrane structure and performance were investigated. The results showed that,the cross-section morphology transferred from finger-liked to sponge-liked, the breaking load and burst pressure improved dramatically with the increase of PEI content. In addition, PEG600 exhibited the best performance among three additives, the breaking load of membrane was 16.55 N, the water flux and bovine serum albumin rejection were 247.39 L/(m~2·h) and 93.9%, respectively.
引文
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[10]吕晓龙,武春瑞,张昊,等.NIPS法聚偏氟乙烯超滤膜的制备与应用[J].中国工程科学,2014,16(12):35-45.
[11]沈立强.聚醚酰亚胺中空纤维超滤膜的研究[D].杭州:浙江大学,2002.
[12]贠延滨,李继定,陈翠仙.聚乙二醇600和草酸对中空纤维超滤膜结构和性能的影响[J].水处理技术,2006,32(2):34-37.
[2]刘镇江.七通道PVC合金中空纤维超滤膜的创新之路[J].膜科学与技术,2010,30(4):102-106.
[3]WANG P,CHUNG T S.Exploring the Spinning and operations of multibore hollow fiber membranes for vacuum membrane distillation[J].Aiche Journal,2014,60(3):1078-1090.
[4]WANG P,CHUNG T S.A New-generation asymmetric multi-bore hollow fiber membrane for sustainable water production via vacuum membrane distillation[J].Environmental Science&Technology,2013,47(12):6272-6278.
[5]张洁敏,赵宝宝,徐天成,等.纺丝过程中拉伸比对七通道聚砜中空纤维膜微结构及性能的影响[J].膜科学与技术,2014,34(6):6-10.
[6]李诗文.聚醚砜/磺化聚砜共混超滤膜制备及微结构调控[D].天津:天津工业大学,2016.
[7]王新威,胡祖明,刘兆峰.聚醚酰亚胺的性能、聚合与纺丝研究[J].材料导报,2007,(S1):408-412.
[8]张瑶.新型聚芳醚腈酮中空纤维超滤膜的研究[D].大连:大连理工大学,2008.
[9]胡亮平.聚醚酰亚胺平板超滤膜的制备研究[D].大连:大连理工大学,2007.
[10]吕晓龙,武春瑞,张昊,等.NIPS法聚偏氟乙烯超滤膜的制备与应用[J].中国工程科学,2014,16(12):35-45.
[11]沈立强.聚醚酰亚胺中空纤维超滤膜的研究[D].杭州:浙江大学,2002.
[12]贠延滨,李继定,陈翠仙.聚乙二醇600和草酸对中空纤维超滤膜结构和性能的影响[J].水处理技术,2006,32(2):34-37.