研究了两步光接枝法制备pH敏感响应分离膜的过程中接枝率随实验条件的变化及其对响应性的影响.实验以聚丙烯为基膜、丙烯酸(AA)为接枝单体,用水作溶剂,考察了光引发剂二苯甲酮(BP)的浓度、丙烯酸的浓度以及反应时间对接枝率的影响,采用傅氏变换红外光谱和扫描电镜分别对高分子膜的化学成分和膜的形貌进行了表征.研究结果表明,控制接枝率在1%～6%时,接枝膜具有较为显著的pH值响应性;接枝率为3%时,接枝膜的pH值响应系数达2.3,当接枝率大于6%和接枝率小于1%时,膜几乎不具pH值敏感响应性.为获得满意的pH值敏感响应性,必须将其接枝率控制在适当的范围内.
参考文献
| [1] | Mika Alicja M.;Childs Ronald F. .Acid/base properties of poly(4-vinylpyridine) anchored within microporous membranes[J].Journal of Membrane Science,1999(1):129-140. |
| [2] | Mika Alicja M.;Dickson James M.;Childs Ronald F. .Chemical valves based on poly(4-vinylpyridine)-filled microporous membranes[J].Journal of Membrane Science,1999(1):45-56. |
| [3] | Zhang K;Wu XY .Temperature and pH-responsive polymeric composite membranes for controlled delivery of proteins and peptides.[J].Biomaterials,2004(22):5281-5291. |
| [4] | Chu LY;Li Y;Zhu JH;Wang HD;Liang YJ .Control of pore size and permeability of a glucose-responsive gating membrane for insulin delivery[J].Journal of Controlled Release: Official Journal of the Controlled Release Society,2004(1):43-53. |
| [5] | Park SB;You JO;Park HY;Haam SJ;Kim WS .A novel pH-sensitive membrane from chitosan--TEOS IPN; preparation and its drug permeation characteristics.[J].Biomaterials,2001(4):323-330. |
| [6] | Ng L;Nakayamab H;Kaetsub I et al.Photocuring of stimulus responsive membranes for controlled release of drugs having different molecular weights[J].Radiation Physics and Chemistry,2005,73(02):117. |
| [7] | Hegazya E A;El-Rehima H A;Shawkyb H A .Investigations and characterization of radiation grafted copolymers for possible practical use in waste water treatment[J].Radiation Phy Chem,2000,57(01):85. |
| [8] | Gupta B;Plummer C;Bisson I;Frey P;Hilborn J .Plasma-induced graft polymerization of acrylic acid onto poly(ethylene terephthalate) films: characterization and human smooth muscle cell growth on grafted films.[J].Biomaterials,2002(3):863-871. |
| [9] | Zhao Z P;Li J;Zhang D X et al.Nanofiltration membrane prepared from polyacrylonitrile ultrafiltration membrane by low-temperature plasma I.Graft of acrylic acid in gas[J].Journal of Membrane Science,2004,232(01):1. |
| [10] | El-Sawy N M;Sagheer F A .Radiation-induced graft polymerization of acrylic acid onto poly (tetrafluoroethylene-perfluorovinyl ether) copolymer films:complexation with some transition metals and biological activity[J].European Polymer Journal,2001,37(01):161. |
| [11] | Yang B;Yang W .Novel pore-covering membrane as a full open/close valve[J].Journal of Membrane Science,2005,258(01):133. |
| [12] | Mika A M et al.A new class of polyelectrolyte-filled microfitration membranes with environmentally controlled porosity[J].Journal of Membrane Science,1995,108(01):37. |
| [13] | Ulbricht M .Photograft-polymer-modified microporous membranes with environment-sensitive permeabilities[J].Reactive and Funtional Polymers,1996,31(02):165. |
| [14] | 尹梅贞,杨万泰.LDPE-BP光还原反应动力学的研究[J].北京化工大学学报,1999(01):31-33. |
| [15] | Kaetsu I;Nakayama H;Uchida K et al.Radiation curing of intelligent coating on biofunctional membranes[J].Radiation Physics and Chemistry,2001,60(03):513. |
| [16] | Ma Huimin;Davis Robert H. .A Novel Sequential Photoinduced Living Graft Polymerization[J].Macromolecules,2000(2):331-335. |
| [17] | Huimin Ma;Robert H.Davis;Christopher N.Bowman .Principal factors affecting sequential photoinduced graft polymerization[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(20):8333-8338. |
| [18] | Lee YM.;Shim JK.;Kim JH.;Cho CS.;Sung YK.;Ihm SY. .PREPARATION OF SURFACE-MODIFIED STIMULI-RESPONSIVE POLYMERIC MEMBRANES BY PLASMA AND ULTRAVIOLET GRAFTING METHODS AND THEIR RIBOFLAVIN PERMEATION[J].Polymer: The International Journal for the Science and Technology of Polymers,1995(1):81-85. |
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