基于辣素衍生物结构阳离子聚电解质的新型抑菌超滤膜的制备及性能表征
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摘要
辣素是一种环境友好的天然防污剂,具有优良的抑菌性能。研究首先将含有辣素衍生物结构的N-(2-羟基-3-叔丁基-3-甲基苯甲基)丙烯酰胺(MBHBA)和三甲基烯丙基氯化铵(TM)光聚合,合成出具有辣素衍生物结构的阳离子聚电解质P(M-co-T);采用自组装方法将其引入聚丙烯腈(PAN)超滤膜表面进行改性,从而首次制备出新型抑菌荷正电超滤膜。结合接触角、红外光谱、扫描电镜等现代表征手段对膜表面性质进行表征,并考察了该抑菌超滤膜的分离性能和抑菌性能。结果表明,以腐殖酸(HA)溶液为污染物模拟料液,改性膜的截留性能和抑菌性能较原膜均有较大改善。当P(M-co-T)浓度为1000 mg·L-1时,改性膜的截留率和抑菌率分别为95.98%和87.90%;抑菌率随着P(M-co-T)浓度增大而提高,当P(M-co-T)浓度为1500 mg·L-1时,抑菌率高达91.50%。可见,含辣素衍生物结构的新型超滤膜在保证良好分离性能的同时,具有较强的抑菌能力,为高性能膜材料的开发开辟了一条新路径。
A cationic polyelectrolyte with a capsaicin derivative structure was prepared by UV-light polymerization using N-(2-hydroxyl-3- butyl-4-methyl) acrylamide(MBHBA) and allyltrimethylammonium chloride(TM) as monomers. Moreover, a novel antibiotic ultrafiltration(UF) membrane was prepared by electrostatic self-assembly methods. Contact Angle and FT-IR analysis were used to characterize the properties of the membrane surface structure. Separation performance and antibacterial properties were also investigated. The results show that the modified UF membrane exhibits better rejection performance and excellent antibacterial properties when compared to the unmodified membrane. When the polyelectrolyte concentration is 1000 mg·L-1, the rejection and antibacterial rate can reach up to 95.98% and 87.90%, respectively. The highest antibacterial rate is obtained(91.50%) when the cationic polyelectrolyte concentration is 1500 mg·L-1. This UF membrane with capsaicin derivatives structure is a promising material for the fabrication of high-efficient membranes.
A cationic polyelectrolyte with a capsaicin derivative structure was prepared by UV-light polymerization using N-(2-hydroxyl-3- butyl-4-methyl) acrylamide(MBHBA) and allyltrimethylammonium chloride(TM) as monomers. Moreover, a novel antibiotic ultrafiltration(UF) membrane was prepared by electrostatic self-assembly methods. Contact Angle and FT-IR analysis were used to characterize the properties of the membrane surface structure. Separation performance and antibacterial properties were also investigated. The results show that the modified UF membrane exhibits better rejection performance and excellent antibacterial properties when compared to the unmodified membrane. When the polyelectrolyte concentration is 1000 mg·L-1, the rejection and antibacterial rate can reach up to 95.98% and 87.90%, respectively. The highest antibacterial rate is obtained(91.50%) when the cationic polyelectrolyte concentration is 1500 mg·L-1. This UF membrane with capsaicin derivatives structure is a promising material for the fabrication of high-efficient membranes.
引文
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[5]Ijichi T.Underwater antifouling agent:JP,55 105 601[P].1980-08-13.
[6]Kenneth J.Fischer.Marine organism repellent covering for protection of underwater objects and method of applying same:US,5 226380[P].1993-07-13.
[7]Liang L,Feng X D,Peurrung L.Temperature-sensitive membranes prepared by UV photopolymerization of N-isopropylacrylamide on a surface of porous hydrophilic polypropylene membranes[J].J Membr Sci,1999,162(1-2):235-246.
[8]UchidaE,Uyama Y,Ikada Y.A novel method for graftpolymerization onto poly(ethyleneterephthalate)by UV-irradiation without degassing[J].Appl Polym Sci,1990,41:677-687.
[9]ZHANG Li(张莉),ZHUO Xin(卓馨).Construction of composite thin flims via layer-by-layer electrostatic self-assembly of chitosan/phosphotungstate Acid(层层静电自组装构筑壳聚糖/磷钨酸复合膜的研究)[J].Inorg Chem(无机化学学报),2007,23(11):1988-1993.
[10]LIU Hai-lin(刘海林),MA Xiao-yan(马晓燕).Self-assembly of poly-electrolyte and its research progress(聚电解质自组装的研究进展)[J].Mater Rev(材料导报),2004,18(10):21-24.
[11]Mahia U,Klaus R,Helmut K.Chemically and morphologically defined ultrafiltration membrane surfaces prepared by heterogeneous photo-initiated graft polymerization[J].Colloids Surf A,1998,138(2-3):353-366.
[12]Choi H,Zhang K,Oerther D B,et al.Influence of cross-flow velocity on membrane performance during filtration of biologicalsuspension[J].J Membr Sci,2005,248(1-2):189-199.