丝朊上接枝聚丙烯腈和聚丙烯酰胺复合过滤膜的性能
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摘要
以高浓度ZnCl_2水溶液为溶剂,采用氧化-还原引发体系,在丝朊(SF)上接枝丙烯腈(AN)和丙烯酰胺(AM)得到铸膜液,以水为凝固浴制备SF上接枝聚丙烯腈-聚丙烯酰胺(SF-g-P(AN-co-AM))复合过滤膜。通过SEM、TG和水接触角对SF-g-P(AN-co-AM)复合过滤膜进行表征,研究了其力学性能、分离性能和抗污染性能。结果表明,随着AM添加量的增加,SF-g-P(AN-co-AM)过滤膜的断裂强度逐渐增加,通量逐渐减少。当AM用量为0.5g时,SF-g-P(AN-co-AM)复合过滤膜的断裂强度达到1.4 MPa,在0.1 MPa压力下,水通量为35L/(m~2·h)。该过滤膜具有良好的分离性能,对0.03g/L刚果红(Mw=696.68)溶液的截留率达到99%。SF-g-P(AN-co-AM)复合过滤膜具有良好的抗污染性能,未经清洗条件下,三次纯水和牛血清白蛋白溶液循环过滤后,通量恢复率还能达到94.4%。
The silk graft polyacrylonitrile-polyacrylamide(SF-g-P(AN-co-AM))composite filtration membrane was produced using zinc chloride aqueous solution as the solvent and using water as the coagulation bath.The SF-gP(AN-co-AM)composite filtration membrane was characterized by SEM,TG analysis and water contact angle.The mechanical properties,separation performance and anti-fouling performance of the SF-g-P(AN-co-AM)membrane were tested.The results show that the fracture strength of the SF-g-P(AN-co-AM)membrane increases with the increasing of the acrylamide content,but the flux decreaseds.When 0.5 g of acrylamide is used,the fracture strength of the SF-g-P(AN-co-AM)membrane reaches 1.4 MPa.The SF-g-P(AN-co-AM)membrane has good separation performance,when the water flux is 35 L/(m2·h)under 0.1 MPa pressure and the rejection rate of 0.03 g/L Congo red(Mw=696.68)solution reaches 99%.The SF-g-P(AN-co-AM)membrane exhibits good anti-fouling performance,and the flux recovery rate is 94.4%after three cycles of pure water and bovine serum albumin solution filtration without cleaning.
The silk graft polyacrylonitrile-polyacrylamide(SF-g-P(AN-co-AM))composite filtration membrane was produced using zinc chloride aqueous solution as the solvent and using water as the coagulation bath.The SF-gP(AN-co-AM)composite filtration membrane was characterized by SEM,TG analysis and water contact angle.The mechanical properties,separation performance and anti-fouling performance of the SF-g-P(AN-co-AM)membrane were tested.The results show that the fracture strength of the SF-g-P(AN-co-AM)membrane increases with the increasing of the acrylamide content,but the flux decreaseds.When 0.5 g of acrylamide is used,the fracture strength of the SF-g-P(AN-co-AM)membrane reaches 1.4 MPa.The SF-g-P(AN-co-AM)membrane has good separation performance,when the water flux is 35 L/(m2·h)under 0.1 MPa pressure and the rejection rate of 0.03 g/L Congo red(Mw=696.68)solution reaches 99%.The SF-g-P(AN-co-AM)membrane exhibits good anti-fouling performance,and the flux recovery rate is 94.4%after three cycles of pure water and bovine serum albumin solution filtration without cleaning.
引文
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[17]张志箭,徐安厚,赵孔银,等.聚羟基丁酸酯纳米纤维支撑海藻酸钙纳滤膜制备及抗污染性能[J].高分子材料科学与工程,2017,33(7):179-183.ZHANG Z J,XU A H,ZHAO K Y,et al.Preparation and anti-fouling properties of polyhydroxybutyrate nanofiber supported calcium alginate nanofiltration membrane[J].Polymer Materials Science and Engineering,2017,33(7):179-183(in Chinese).
[18]吴雪平,杨永岗,凌立成,等.丙烯腈-丙烯酰胺溶液共聚合及其产物热性能研究[J].新型炭材料,2003,18(3):196-202.WU X P,YANG Y G,LING L C,et al.Solution polymerization and thermal properties of acrylonitrile(AN)-acrylamide(AM)copolymer[J].New Carbon Materials,2003,18(3):196-202(in Chinese).
[2]ZHAO K Y,ZHANG X X,WEI J F,et al.Calcium alginate hydrogel filtration membrane with excellent anti-fouling property and controlled separation performance[J].Journal of Membrane Science,2015,492:536-546.
[3]MANSOURIZADEH A,AZAD A J.Preparation of blend polyethersulfone/cellulose acetate/polyethylene glycol asymmetric membranes for oil-water separation[J].Journal of Polymer Research,2014,21(3):0375.
[4]RAHIMPOUR A,MADAENI S S.Polyethersulfone(PES)/cellulose acetate phthalate(CAP)blend ultrafiltration membranes:Preparation,morphology,performance and antifouling properties[J].Journal of Membrane Science,2007,305(1-2):299-312.
[5]OCHOA N A,MASUELLI M,MARCHESE J.Effect of hydrophilicity on fouling of an emulsified oil wastewater with PVDF/PMMA membranes[J].Journal of Membrane Science,2003,226(1-2):203-211.
[6]HOWE K J,CLARK M M.Fouling of microfiltration and ultrafiltration membranes by natural waters[J].Environmental Science&Technology,2002,36(16):3571-3576.
[7]LEE N H,AMY G,CROUE J P.Low-pressure membrane(MF/UF)fouling associated with allochthonous versus autochthonous natural organic matter[J].Water Research,2006,40(12):2357-2368.
[8]BRYJAK M,HODGE H,DACH B.Modification of porous polyacrylonitrile membrane[J].Angewandte Makromolekulare Chemie,1998,260(1):25-29.
[9]SUN Y Y,SHAO Z Z,ZHOU J,et al.Compatibilization of acrylic polymer-silk fibroin blend fibers I:Graft copolymerization of acrylonitrile onto silk fibroin[J].Journal of Applied Polymer Science,1998,69(6):1089-1097.
[10]SUN Y Y,SHAO Z Z,ZHOU J,et al.Compatibilization of acrylic polymer-silk fibroin blend fibers 2:Morphology and mechanical properties of the compatilized blend fibers[J].Journal of Applied Polymer Science,1999,73(11):2255-2264.
[11]SUN Y Y,SHAO Z Z,ZHOU J,et al.Acrylic polymer-silk fibroin blend fibers[J].Journal of Applied Polymer Science,1997,65(5):959-966.
[12]李秋莲,赵仕余,张蓉,等.丙烯腈-丝朊蛋白接枝共聚反应的研究[J].四川大学学报(工程科学版),2000,32(3):116-118.LI Q L,ZHAO S Y,ZHANG R,et al.Study on graft copolymerization of AN/fibroin[J].Journal of Sichuan University(Engneering Science Edition),2000,32(3):116-118(in Chinese).
[13]蔺洪全,赵孔银,马敬环,等.TiO2-海藻酸钙复合膜的表征、对染料的光催化降解及TiO2回收[J].复合材料学报,2015,32(3):911-917.LIN H Q,ZHAO K Y,MA J H,et al.Characterization and dyes photocatalytic degradation of TiO2-calcium alginate membrane and the recovery of TiO2[J].Acta Materiae Compositae Sinica,2015,32(3):911-917(in Chinese).
[14]刘东,赵孔银,宋欢语,等.硅酸钙-海藻酸钙复合水凝胶膜的制备及表征[J].复合材料学报,2017,34(11):2401-2406.LIU D,ZHAO K Y,SONG H Y,et al.Preparation and characterization of calcium silicate-calcium alginate composite hydrogel membrane[J].Acta Materiae Compositae,Sinica,2017,34(11):2401-2406(in Chinese).
[15]徐安厚,张新新,赵孔银,等.自支撑海藻酸钙水凝胶抗污染过滤膜的制备及截留性能[J].高分子学报,2015(8):913-920.XU A H,ZHANG X X,ZHAO K Y,et al.Preparation and rejection properties of free-standing anti-fouling calcium alginate hydrogel filtration membranes[J].Acta Polymerica Sinica,2015(8):913-920(in Chinese).
[16]陈敏,张新新,赵孔银,等.抗污染海藻酸钙水凝胶纳滤膜对水中重金属离子的去除性能[J].高分子材料科学与工程,2016,32(8):99-103.CHEN M,ZHANG X X,ZHAO K Y,et al.Removal of heavy metal ions from water by calcium alginate hydrogel nanofiltration membrane with high anti-fouling performance[J].Polymer Materials Science and Engineering,2016,32(8):99-103(in Chinese).
[17]张志箭,徐安厚,赵孔银,等.聚羟基丁酸酯纳米纤维支撑海藻酸钙纳滤膜制备及抗污染性能[J].高分子材料科学与工程,2017,33(7):179-183.ZHANG Z J,XU A H,ZHAO K Y,et al.Preparation and anti-fouling properties of polyhydroxybutyrate nanofiber supported calcium alginate nanofiltration membrane[J].Polymer Materials Science and Engineering,2017,33(7):179-183(in Chinese).
[18]吴雪平,杨永岗,凌立成,等.丙烯腈-丙烯酰胺溶液共聚合及其产物热性能研究[J].新型炭材料,2003,18(3):196-202.WU X P,YANG Y G,LING L C,et al.Solution polymerization and thermal properties of acrylonitrile(AN)-acrylamide(AM)copolymer[J].New Carbon Materials,2003,18(3):196-202(in Chinese).
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