Ag/PAMAM树形分子纳米复合材料对PTFE膜性能的影响
|
摘要
以第4.0代端氨基聚酰胺-胺型树形分子(G4.0-NH2PAMAM)为模板制备Ag/PAMAM纳米复合材料(Ag·DENPs),利用了Ag·DENPs与聚四氟乙烯(PTFE)膜表面的氢键作用,通过超声沉积的方法制备出了PTFE-Ag/PAMAM复合膜。通过研究沉积时间对Ag·DENPs在PTFE膜表面沉积量的影响,得到饱和沉积时间是60min,沉积量约为2.32mg。通过UV-vis光谱和SEM对其化学组成和微观形貌迚行了表征。复合膜的水接触角为105.3°,较纯PTFE膜降低了23.6°,显著改善PTFE膜表面亲水性。复合膜对水和牛血清白蛋白的通量比纯PTFE膜低,但傅立叶变换衰减全反射红外光谱(FRR)为88.2%,比纯PTFE膜的35.4%高出了52.8%,且对大肠杆菌及金黄色葡萄球菌具有抑菌作用。表明Ag·DENPs的引入可以改善PTFE的抗污染性及抑菌性。
Silver-PAMAM dendrimer nanocompoisite(Ag·DENPs) was used to modify the PTFE membrane by ultrasonic deposition method.Chemical composition and micro-morphology of modified PTFE membrane were characterized by UV-vis spectroscopy and SEM.The results showed that Ag·DENPs increased the surface roughness and decreased the pore size of PTFE membranes,and made a significant improvement in PTFE membranes surface hydrophilicity.Flux recovery ratio(FRR) increased about 52.8% in the presence of Ag·DENPs on the PTFE membranes surface,which elucidated the anti-organic fouling performance of PTFE membranes was elevated.Simultaneously,anti-bacterial test confirmed that PTFE-Ag/PAMAM membranes showed superior anti-biofouling activity.
Silver-PAMAM dendrimer nanocompoisite(Ag·DENPs) was used to modify the PTFE membrane by ultrasonic deposition method.Chemical composition and micro-morphology of modified PTFE membrane were characterized by UV-vis spectroscopy and SEM.The results showed that Ag·DENPs increased the surface roughness and decreased the pore size of PTFE membranes,and made a significant improvement in PTFE membranes surface hydrophilicity.Flux recovery ratio(FRR) increased about 52.8% in the presence of Ag·DENPs on the PTFE membranes surface,which elucidated the anti-organic fouling performance of PTFE membranes was elevated.Simultaneously,anti-bacterial test confirmed that PTFE-Ag/PAMAM membranes showed superior anti-biofouling activity.
引文
[1]Takht Ravanchi.M,Kaghazchi.T,Kargari.A,Application of membrane separation processes in petrochemical industry:a review[J].Desalination,2009,235:199-244.
[2]徐鹏飞,马承愚,韩慧.PTFE膜在水处理中的应用迚展[J].环境工程,2014,32:271-274.
[3]Wang.X,Tian.Y.X,Wang.Z.B,Tao.Y.A novel hydrophilic modification of PTFE membranes using in situ deposited PANI[J].Journal of macromolecular science part B-physics,2011,50(1):172-178.
[4]Lai.C.L,etal.Preparation and characterization of plasma-modified PTFEmembrane and its application in direct contact membrane distillation[J].Journal of Agricultural&Food Chemistry,2013,61(50):12265-12273.
[5]Li.G.P,Luo.Y.J,Lu.W.T,Li.J,Jin.Y.J,Guo.S.F.Dependence of property of silver nanoparticles within dendrimer-template on molar of Ag+to PAMAM dendrimer[J].Chinese Journal of Chemistry,2010,28(4):633-638.
[6]Mulvaney.P.Surface plasmon spectroscopy of nanosized metal particles[J].Langmuir,1996,12(3):788-800.
[7]Binnig G.Atomic forcemicroscope[J].Physical review letters,1986,56(5):930-935.
[8]马丼苹,纠敏,秦翠丼,赵君峰,张春雷.微生物抑制法检测牛乳中青霉素类药物残留的研究[J].现代食品科技,2013,1(28):193-196.
[9]Li.G.P,Shen.L.H,Luo.Y.J,Zhang.S.M.The effect of silver-PAMAMdendrimernanocomposites on the performance of PVDF membranes[J].Desalination,2014,338:115-120.
[10]张秀菊,陈文彬,林志丹.二氧化钛负载细菌纤维素纳米复合材料的抗菌性及细胞相容性的研究[J].化学世界,2011,52(11):641-644.
[11]墙蔷,倪红,卫并伟.银的抗菌作用机理[J].武汉科技大学学报,2007,30(2):121-124.
[12]Yoshihiro.L,Masanobu.H,Hiroo.T,et al.Bactericidal activity of Ag-zeolite mediated by reactive oxygen species under aerated conditions[J].Journal of Inorganic Biochemistry,2002,92(1):5.
[13]管迎梅,陈兆文,范海明,翟密橙,黄华尧.银系抗菌纤维的制备工艺[J].船舶防化,2009,4:1-5.
[2]徐鹏飞,马承愚,韩慧.PTFE膜在水处理中的应用迚展[J].环境工程,2014,32:271-274.
[3]Wang.X,Tian.Y.X,Wang.Z.B,Tao.Y.A novel hydrophilic modification of PTFE membranes using in situ deposited PANI[J].Journal of macromolecular science part B-physics,2011,50(1):172-178.
[4]Lai.C.L,etal.Preparation and characterization of plasma-modified PTFEmembrane and its application in direct contact membrane distillation[J].Journal of Agricultural&Food Chemistry,2013,61(50):12265-12273.
[5]Li.G.P,Luo.Y.J,Lu.W.T,Li.J,Jin.Y.J,Guo.S.F.Dependence of property of silver nanoparticles within dendrimer-template on molar of Ag+to PAMAM dendrimer[J].Chinese Journal of Chemistry,2010,28(4):633-638.
[6]Mulvaney.P.Surface plasmon spectroscopy of nanosized metal particles[J].Langmuir,1996,12(3):788-800.
[7]Binnig G.Atomic forcemicroscope[J].Physical review letters,1986,56(5):930-935.
[8]马丼苹,纠敏,秦翠丼,赵君峰,张春雷.微生物抑制法检测牛乳中青霉素类药物残留的研究[J].现代食品科技,2013,1(28):193-196.
[9]Li.G.P,Shen.L.H,Luo.Y.J,Zhang.S.M.The effect of silver-PAMAMdendrimernanocomposites on the performance of PVDF membranes[J].Desalination,2014,338:115-120.
[10]张秀菊,陈文彬,林志丹.二氧化钛负载细菌纤维素纳米复合材料的抗菌性及细胞相容性的研究[J].化学世界,2011,52(11):641-644.
[11]墙蔷,倪红,卫并伟.银的抗菌作用机理[J].武汉科技大学学报,2007,30(2):121-124.
[12]Yoshihiro.L,Masanobu.H,Hiroo.T,et al.Bactericidal activity of Ag-zeolite mediated by reactive oxygen species under aerated conditions[J].Journal of Inorganic Biochemistry,2002,92(1):5.
[13]管迎梅,陈兆文,范海明,翟密橙,黄华尧.银系抗菌纤维的制备工艺[J].船舶防化,2009,4:1-5.