多壁碳纳米管/Fe_3O_4/SiO_2/聚氯乙烯共混膜的制备及性能研究
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摘要
采用浓硫酸/浓硝酸(体积比3∶1)混酸改性、超声混融和化学水热法配制负载Fe_3O_4的多壁碳纳米管(MWCNTs),将酸化改性的MWCNTs/Fe_3O_4与纳米级SiO_2以适当比例混合超声研磨所得添加剂MWCNTs/Fe_3O_4/SiO_2与聚氯乙烯(PVC)、聚乙二醇(PEG)、N,N-二甲基乙酰胺(DMAC)共混制膜,获得MWCNTs/Fe_3O_4/SiO_2/PVC共混膜。通过对膜的纯水通量、溶胀度、孔隙率、平均孔径和牛血清蛋白(BSA)截留率进行比较,结果发现:MWCNTs/Fe_3O_4/SiO_2/PVC的接触角为68.1°,纯水通量为111L·m2/h,BSA截留率为73.9%,皆较PVC膜有所提高,且膜的抗张强度(2.09MPa)和延伸率(17.01%)较MWCNTs/Fe_3O_4/PVC膜有所提高。
Using the mixed acid modification which the ratio of concentrated sulfuric acid and concentrated nitric acid was 3∶1,ultrasonic mixing and chemical hydrothermal method,Fe_3O_4 loaded MWCNTs was configured,the acid modified MWCNTs/Fe_3O_4 and nanometer silica(SiO_2)with the appropriate proportion of mixed income ultrasonic grinding additives MWCNTs/Fe_3O_4/SiO_2 was blended with PVC,PEG and N,N-two acetamide(DMAC)to obtain MWCNTs/Fe_3O_4/SiO_2/PVC blend film.Based on compared the membrane flux,swelling degree,porosity,average pore size and bovine serum albumin(BSA)rejection rate,the results showed that the contact angle of MWCNTs/Fe_3O_4/SiO_2/PVC was 68.1°,the pure water flux of 111 L·m2/h,the retention rate of BSA was 73.9%,which was higher than that of PVC film.The tensile strength(2.09 MPa)and elongation(17.01%)were higher than those of MWCNTs/Fe_3O_4/PVC.
Using the mixed acid modification which the ratio of concentrated sulfuric acid and concentrated nitric acid was 3∶1,ultrasonic mixing and chemical hydrothermal method,Fe_3O_4 loaded MWCNTs was configured,the acid modified MWCNTs/Fe_3O_4 and nanometer silica(SiO_2)with the appropriate proportion of mixed income ultrasonic grinding additives MWCNTs/Fe_3O_4/SiO_2 was blended with PVC,PEG and N,N-two acetamide(DMAC)to obtain MWCNTs/Fe_3O_4/SiO_2/PVC blend film.Based on compared the membrane flux,swelling degree,porosity,average pore size and bovine serum albumin(BSA)rejection rate,the results showed that the contact angle of MWCNTs/Fe_3O_4/SiO_2/PVC was 68.1°,the pure water flux of 111 L·m2/h,the retention rate of BSA was 73.9%,which was higher than that of PVC film.The tensile strength(2.09 MPa)and elongation(17.01%)were higher than those of MWCNTs/Fe_3O_4/PVC.
引文
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[3]吴浩.多壁碳纳米管功能化及与聚氯乙烯共混超滤膜的制备及性能研究[D].广州:华南理工大学,2016.
[4]谭丽莎,孙明洋,胡运俊,等.功能化纳米Fe3O4磁性材料的制备及其对水中重金属离子的去除[J].化学进展,2013,23(12):2147-2158.
[5]封余贤,乔磊磊,蓝平,等.磁性纳米四氧化三铁制备研究进展[J].化学世界,2014,67(1):50-54.
[6]陈利.多壁碳纳米管/聚氯乙烯复合材料的制备及性能[J].高分子材料科学与工程,2009,25(4):140-143.
[7]曹柳南,文海荣.多壁碳纳米管/聚氯乙烯复合材料的制备[J].科学之友,2010,29(24):40-41.
[8]黄剑坤,刘会娥,黄扬帆,等.多壁碳纳米管/二氧化硅纳米复合材料的制备及其吸油性能[J].化工学报,2016,94(10):4485-4492.
[9]寇伍轩,赵岳,高崇杰,等.SiO2@MWCNTs/EP纳米复合材料性能研究[J].绝缘材料,2017,52(4):10-14.
[10]许昆鹏.二氧化硅改性聚氨酯/聚氯乙烯超滤膜的研究[J].清洗世界,2015,43(6):244-246.
[11]孙健明,肇研,李翔,等.多壁碳纳米管表面均匀沉淀包覆四氧化三铁及其磁性能的研究[J].材料科学与工艺,2014,33(3):102-107.
[12]Ma J,Zhao Y,Xu Z,et al.Role of oxygen-containing groups on MWCNTs in enhanced separation and permeability performance for PVDF hybrid ultrafiltration membranes[J].Desalination,2013,320(7):1-9.
[13]Zhang J,Xu Z,Shan M,et al.Synergetic effects of oxidized carbon nanotubes and graphene oxide on fouling control and antifouling mechanism of polyvinylidene fluoride ultrafiltration membranes[J].Journal of Membrane Science,2013,448(12):81-92.
[14]许昆鹏,赵梓年,沈惠玲,等.聚氨酯/二氧化硅超滤膜的制备及其应用研究[J].中国塑料,2014,28(12):79-83.
[15]廖婵娟,赵健全,于萍,等.不同结构二氧化硅对聚偏氟乙烯超滤膜的性能影响[J].化工进展,2011,31(S2):277-281.
[16]Hamed Eshgarf,Masoud Afrand.An experimental study on rheological behavior of non-newtonian hybrid nano-coolant for application in cooling and heating systems[J].Experimental Thermal and Fluid Science,2016,76(3):221-227.