交联改性(PEI/PSS)_(4.5)-PAN复合纳滤膜及其对Ni~(2+)的分离性能
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- 英文论文题名：Cross-linking(PEI/PSS)_(4.5)/PAN composite nanofiltration membrane towards retention of Ni~(2+)
- 论文作者：秦振平 ; 耿常乐 ; 刘燕 ; 纪树兰 ; 郭红霞
- 英文论文作者：QIN Zhenping ; GENG Changle ; LIU Yan ; JI Shulan ; GUO Hongxia ; College of Environnental and Energy Engineering ; Beijing Key Laboratory for Green Catalysis and Separation ; Shijiazhuang CSD E.P.facilities operating Ltd.Co. ; Beijing Ketaixingda High Technology Ltd.Co. ; College of Materials Science and Engineering ; Beijing University of Technology
- 年：2016
- 作者机构：北京工业大学环境与能源工程学院;北京市绿色催化与分离重点实验室;石家庄中持环保设施运营有限公司;北京科泰兴达高新技术有限公司;北京工业大学材料科学与工程学院;
- 论文关键词：复合纳滤膜 ; 层层自组装 ; 交联改性
- 英文论文关键词：composite nanofiltration membrane ; Layer-by-Layer ; crosslinked
- 会议召开时间：2016-11-25
- 会议录名称：第五届全国膜分离技术在冶金工业中应用研讨会论文集
- 语种：中文
- 分类号：TQ051.893
- 学会代码：LXJT
- 会议名称：第五届全国膜分离技术在冶金工业中应用研讨会
- 会议地点：中国湖南长沙
- 主办单位：中国膜工业协会、中南大学
- 学会名称：中国蓝星(集团)总公司膜科学与技术编辑部
- 页数：6
- 文件大小：366k
- 原文格式：O
- 会议级别：全国
摘要
采用戊二醛(GA)为交联剂,硫酸(H_2SO_4)为催化剂,对层层自组装(LbL)制备的(PEI/PSS)_(4.5)-PAN复合纳滤膜进行交联改性,红外光谱(FTIR)和热分析(DCS)表征了交联前后复合膜的结构,研究了交联前后的复合膜纳滤截留Ni~(2+)性能变化.结果表明,交联度增大,聚电解质的热稳定性越大;当交联剂浓度为5.0wt%,催化剂浓度为0.50wt%,30℃交联24 h后,交联改性复合膜对500 mg/LNiCl_2溶液的截留率为98.8%,单位压力下通量为24.6 L/(m~2·h);与未交联改性复合纳滤膜相比,复合膜的截留率有所提高,同时还保持较高的通量,并显示良好的长期运行稳定性.
The(PEI/PSS)_(4.5)-PAN composite membrane prepared by layer-by-layer self-assembly method was cross-linked using glutaraldehyde(GA) as crosslinking agent and sulfuric acid(H_2SO_4) as catalyst.The structure of the membrane was characterized by FTIR and DCS,and the nanofiltration retention of Ni~(2+) was also investigated.The results showed that the thermos stability of the membrane increased with increasing crosslinking degree.When the concentration of GA was 5.0wt%,and the concentration of H_2SO_4 was 0.50wt%,cross-linking at 30 ℃ for 24 h,the obtained cross-linked(PEI/PSS)_(4.)- PAN composite membrane showed 98.8%retention ratio for 500 mg/L of Ni~(2+) solution,along with the flux of24.6 L/(m~2 · h · MPa).Compared to the uncrosslinked pristine membrane,the crosslinked composite nanofiltration membrane showed an improved rejection ratio and flux,with a long-term running stability.
The(PEI/PSS)_(4.5)-PAN composite membrane prepared by layer-by-layer self-assembly method was cross-linked using glutaraldehyde(GA) as crosslinking agent and sulfuric acid(H_2SO_4) as catalyst.The structure of the membrane was characterized by FTIR and DCS,and the nanofiltration retention of Ni~(2+) was also investigated.The results showed that the thermos stability of the membrane increased with increasing crosslinking degree.When the concentration of GA was 5.0wt%,and the concentration of H_2SO_4 was 0.50wt%,cross-linking at 30 ℃ for 24 h,the obtained cross-linked(PEI/PSS)_(4.)- PAN composite membrane showed 98.8%retention ratio for 500 mg/L of Ni~(2+) solution,along with the flux of24.6 L/(m~2 · h · MPa).Compared to the uncrosslinked pristine membrane,the crosslinked composite nanofiltration membrane showed an improved rejection ratio and flux,with a long-term running stability.
引文
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[2]Tieke B,Toutianoush A,Jin W.Selective transport of ions and molecules across layer-by-layer assembled membranes of polyelectrolytes,p-sulfonato-calix[n]arenes and Prussian Blue-type complex salts[J].Adv Coll Interf Sci,2005,116(1/3):121-131.
[3]Deng H,Xu Y,Zhu B,et al.Polyelectrolyte membranes prepared by dynamic self-assembly of poly(4-styrenesulfonic acid-co-maleic acid)sodium salt(PSSMA)for nanofiltration(I)[J].J Membr Sci,2008,323(1):125-133.
[4]Qin Z,Geng C,Guo H,et al.Synthesis of positively charged polyelectrolyte multilayer membranes for divalent metal ions removal[J].J Mater Res,2013,28(11):1449-1457.
[5]Guo H,Chen M,Liu Q,et al.LbL assembly of sulfonated cyclohexanone-formaldehyde condensation polymer and poly(ethyleneimine)for rejection of cationic ions and dyesf[J].Desalination,2015:108-116.
[6]戴喆男,周勇,赵婷,等.自组装改性纳滤膜研究[J].水处理技术.2012(06):29-31.
[7]杨萌,相艳,王慕冰,等.化学与生物改性合成质子交换膜[J].化学进展.2009(01):244-250.
[8]杜子昂,秦振平,郭红霞,等.静电自组装PDDA/CMCNa聚电解质复合纳滤膜及其性能[J].膜科学与技术,2015,35(1):64-69.
[9]秦振平,郭红霞,任晓燕,等.交联改性PDDA/CMCNa复合纳滤膜的研究[J].膜科学与技术,2016,36(4):19-23.
[10]陈尧,陈国华,陈容,等.戊二醛-H_2SO_4混合交联壳聚糖/聚砜复合纳滤膜的结构与性能[J].膜科学与技术.2007(04):31-36.
[11]胡皆汉,郑学仿,编著.实用红外光谱学[M]//北京:科学出版社,2011.