TPPS在EVAL膜表面的吸附及超分子自组装
作者:张玉新12,赵莉芝12,张玉忠12,叶卉12,刘满满12,李泓12
单位: 1. 天津工业大学材料科学与工程学院,天津,300387;
关键词: TPPS;DMAEMA;EVAL
出版年,卷(期):页码: 2015,35(1):1-8

摘要:
TPPS(四-(4- 磺酸基苯基)卟啉)在一定条件下可以自组装形成超分子聚集体。将TPPS超分子聚集体与膜材料结合,可制备一种超分子负载膜。本实验以EVAL(乙烯-乙烯醇共聚物)为基膜,以DMAEMA(甲基丙烯酸N,N-二甲氨基乙酯)为单体,采用紫外接枝的方法制备了EVAL-g-PDMAEMA接枝膜,利用氢键、静电作用等非共价键作用将TPPS负载于EVAL原膜及EVAL-g-PDMAEMA接枝膜上。研究了pH值、离子强度、接枝率对吸附过程的影响及等温吸附机理。结果表明,当pH=3.6时接枝膜对TPPS的吸附容量最大,pH=7时,原膜对TPPS的吸附容量最大;离子强度的增大不利于膜对TPPS的吸附;EVAL-g-PDMAEMA接枝率的增大,接枝膜对TPPS的吸附容量也随之增大;Langmuir吸附等温方程可以对吸附过程进行很好的描述。改变EVAL /TPPS负载膜的pH条件,利用紫外漫反射光谱表征膜表面TPPS的聚集状态,考察不同DMAEMA接枝率的负载膜实现超分子结构的条件。实验结果显示,当pH<1时,TPPS在接枝膜和原膜表面均形成超分子J-聚集体,而pH>1时,TPPS仅在接枝膜表面形成H-聚集;并且DMAEMA的接枝率越高,越有利于TPPS聚集体的形成,进而有利于超分子负载膜的构筑。
TPPS can spontaneously assemble into supramolecular aggregates under certain conditions. A supramolecular membrane was prepared based on TPPS supramolecular aggregates and membrane materials. In this paper, EVAL-g-PDMAEMA membrane was prepared by ultraviolet radiation grafting with EVAL as the raw membrane and DMAEMA as the monomer. The TPPS was loaded on EVAL and EVAL-g-PDMAEMA membrane via non-covalent as hydrogen bonds, electrostatic interactions, etc. The effects of pH, ionic strength and grafting degree on the adsorption process and isothermal adsorption mechanism of TPPS was studied. The results showed that, the maximum absorption of TPPS on the grafted membrane appeared at pH=3.6, while on the raw membrane at pH=7. The increase of ionic strength caused an adverse impact on the adsorption of TPPS on the membrane surface. While the adsorption amount of TPPS increased with the increase of EVAL-g-PDMAEMA grafting degree. The adsorption process can be well described by Langmuir isotherm model. The aggregation state of TPPS and the conditions of constructing a supramolecular structure was studied by changing the pH of the EVAL-g-PDMAEMA/TPPS membrane with aid of UV reflectance spectroscopic. The results show that, at pH<1, TPPS formed supramolecular J-aggregates on the EVAL and EVAL-g-PDMAEMA membrane surface, while at pH>1, only formed H-aggregates on EVAL-g-PDMAEMA membrane surface. Besides, higher grafting degree of DMAEMA contributed to the formation of TPPS aggregates, further to the building of supramolecular membrane.
 
张玉新(1986—),男,山东德州人,硕士研究生

参考文献:
[1] Lehn J M. Supramolecular Chemistry: Concepts and Perspectives[M]. Weinheim: Vch,1995,154,1-9.
[2] 沈家骢等. 超分子研究进展[J]. 中国科学院院刊,2004,6(19),420-424.
[3] Lehn J M. Toward self-organization and complex matter[J]. Science, 2002 , 295(29) : 2400 - 2403.
[4] Hamley I W. Nanotechnology with soft materials[J]. Angew Chem Int Ed,2003,42(15):1692-1712.
[5] Yan D, Zhou Y, Hou J. Supramolecular self-assembly of macroscopic tubes[J]. Science,2004,303(2):65-67.
[6] 于澍燕,张忠兴,李慧等. 由功能化穴醚核与六个双金(I) 配位单元构筑的金属基树形超分子的自组装及发光性质[J]. 高等学校化学学报,2005,26(2):376-378.
[7] Synytsya A, Blafkova P, Volka K. Interaction of meso-tetrakis(4-sulphonatophenyl) porphine with chitosan[J]. Spectrochemica Acta,2006,21(5):4-6.
[8] 张红芬,潘景浩,常海波等. 用三种不同方法研究 TPPS与 DM-β-CD的相互作用[J]. 分析科学学报,2006,11(2):3-4.
[9] 黄 涛,王永强,田永驰等. 卟啉在表面活性剂溶液中的聚集态[J]. 武汉化工学院学报, 1998, 20(5): 1- 4.
[10] Bo Liao, Ruiguang Liu, Yong Huang. A Supramolecular Chiroptical Switch Based on Chitosan and Anionic Porphyrin Complex Film[J]. Polymer,2007,10(39):1071-1077.
[11] Lizhi Zhao, Rui Xiang, Rujiang Ma, Xin Wang, Yingli An, and Linqi Shi*, Chiral Conversion and Memory of TPPS J-aggregates in Complex Micelles: PEG-b-PDMAEMA/TPPS[J]. Langmuir, 2011, 27 (18):11554–11559.
[12]胡晖,范晓东. 聚(甲基丙烯酸N, N-二甲氨基乙酯/ 丙烯酸2-乙基己酯)的温度及pH 敏感性能的研究[J]. 精细化工,2003,20:65-68.
[13] 裴广玲,杜启云,成国祥. 螯合树脂填充膜的制备及其对铜(Ⅱ)的吸附研究[J]. 膜科学与技术,2001,10:14-19.
[14]孙健新,张玉忠等. 4A分子筛掺杂 PES膜吸附剂的制备及其对Cu2+吸附性能研究[J]. 天津工业大学学报,2013,1(32):5-13.
[15] 叶卉. 乙烯-乙烯醇共聚物分离膜制备及其乳清资源化利用研究[D]. 天津工业大学,2011:127-129.
[16] 王玥,杜守颖等. 芍药苷大孔树脂静态吸附动力学研究[J]. 北京中医药大学学报,2012,35(1):57-61.
[17] Kimberly L. Jones, Charles R. O’Melia. Protein and humic acid adsorption onto hydrophilic membrane surfaces: effects of pH and ionic strength[J]. Journal of Membrane Science,2000,165:31-46.

服务与反馈:
文章下载】【加入收藏

《膜科学与技术》编辑部 地址:北京市朝阳区北三环东路19号蓝星大厦 邮政编码:100029 电话:010-64426130/64433466 传真:010-80485372邮箱:mkxyjs@163.com

京公网安备11011302000819号