冷冻交联制备ZM-CSt-PVA复合凝胶及吸附Cu~(2+)性能
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摘要
以两性离子单体二甲氨基丙基丙烯酰胺-1-羧酸(ZM)、木薯淀粉(CSt)和聚乙烯醇(PVA)为主要原料,采用"一锅法",通过冷冻交联制备ZM接枝共聚CSt-PVA互穿网络复合凝胶(ZPG2)。使用FTIR、TGA、POM、SEM-EDS对ZPG2进行了表征,评价了ZPG2对Cu~(2+)的静态吸附效果。结果表明:300℃以下,ZPG2的热稳定性良好;ZM的存在可产生反聚电解质效应和化学配位效应,显著提高凝胶吸附能力;在吸附温度25℃、ZPG20.1 g、Cu~(2+)质量浓度2×10~3 mg/L、溶液体积100 mL时,饱和吸附量为199 mg/g;吸附过程符合Langmuir等温吸附模型和准二级动力学模型。
Zwitterionic monomer(ZM), cassava starch(CSt) and polyvinyl alcohol(PVA) were used as main raw materials to prepare a ZM graft copolymerized CSt-PVA interpenetrating network composite gel(ZPG2) through freezing cross-linking method with a one-pot process. ZPG2 was characterized by FTIR,TGA, POM, SEM-EDS. The static adsorption effect of ZPG2 on Cu~(2+) was evaluated. The results showed that ZPG2 had good thermal stability below 300 ℃. The presence of ZM produced an anti-polyelectrolyte effect and a chemical coordination effect, which increased the gel adsorption capacity significantly.Saturated adsorption amount was as much as 199 mg/g when adsorption temperature was 25 ℃, ZPG2 dosage was 0.1 g, Cu~(2+) mass concentration was 2×10~3 mg/L, and solution volume was 100 mL. The data of adsorption isotherm was well described by the Langmuir isotherm adsorption model while the adsorption kinetics of ZPG2 fitted well with the pseudo-second-order kinetic model.
Zwitterionic monomer(ZM), cassava starch(CSt) and polyvinyl alcohol(PVA) were used as main raw materials to prepare a ZM graft copolymerized CSt-PVA interpenetrating network composite gel(ZPG2) through freezing cross-linking method with a one-pot process. ZPG2 was characterized by FTIR,TGA, POM, SEM-EDS. The static adsorption effect of ZPG2 on Cu~(2+) was evaluated. The results showed that ZPG2 had good thermal stability below 300 ℃. The presence of ZM produced an anti-polyelectrolyte effect and a chemical coordination effect, which increased the gel adsorption capacity significantly.Saturated adsorption amount was as much as 199 mg/g when adsorption temperature was 25 ℃, ZPG2 dosage was 0.1 g, Cu~(2+) mass concentration was 2×10~3 mg/L, and solution volume was 100 mL. The data of adsorption isotherm was well described by the Langmuir isotherm adsorption model while the adsorption kinetics of ZPG2 fitted well with the pseudo-second-order kinetic model.
引文
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[3]Fu Yongsheng(付永胜),Zhao Junfeng(赵君凤),Wang Qun(王群),et al.Adsorption efficiency of lignin-based ion exchange resin on heavy metal ions[J].Chinese Journal of Environmental Engineering(环境工程学报),2016,10(8):4314-4318.
[4]Guo Yanni(郭燕妮),Feng Zengkun(方增坤),Hu Jiehua(胡杰华),et al.Research development of treating wastewater containing heavy metals by chemical precipitation process[J].Industrial Water Treatment(工业水处理),2011,31(12):9-13.
[5]Tran T K,Chiu K F,Lin C Y,et al.Electrochemical treatment of wastewater:Selectivity of the heavy metals removal process[J].International Journal of Hydrogen Energy,2017,42(45):27741-27748.
[6]Oyetibo G O,Chien M F,Ikeda-Ohtsubo W.Biodegradation of crude oil and phenanthrene by heavy metal resistant Bacillus subtilis isolated from a multi-polluted industrial wastewater creek[J].International Biodeterioration&Biodegradation,2017,120:143-151.
[7]Muya F N,Sunday C E,Baker P,et al.Environmental remediation of heavy metal ions from aqueous solution through hydrogel adsorption:A critical review[J].Water Science&Technology,2016,73(5):983-992.
[8]Li J,Zheng L,Liu H.A novel carbon aerogel prepared for adsorption of copper(Ⅱ)ion in water[J].Journal of Porous Materials,2017,24(6):1575-1580.
[9]Zhang Siyue(张思月),Zhang Yongde(张永德),Luo Xuegang(罗学刚),et al.Preparation and adsorption properties of pectin/AMP-Zn microspheres for cesium ions[J].Fine Chemicals(精细化工),2018,35(5):846-856.
[10]Thong C C,Teo D C L,Ng C K.Application of polyvinyl alcohol(PVA)in cement-based composite materials:A review of its engineering properties and microstructure behavior[J].Construction&Building Materials,2016,107:172-180.
[11]Li B,Cao J,Cao X,et al.Preparation and characterization of chemically crosslinked polyvinyl alcohol/carboxylated nanocrystalline cellulose nanocomposite hydrogel films with high mechanical strength[J].Journal of Macromolecular Science,Part B,2016,55(5):518-531.
[12]Sasaki S,Murakami T,Suzuki A.Frictional properties of physically cross-linked PVA hydrogels as artificial cartilage[J].Biosurface&Biotribology,2016,2(1):11-17.
[13]Ma H L,Zhang L,Zhang Y,et al.Radiation preparation of graphene/carbon nanotubes hybrid fillers for mechanical reinforcement of poly(vinyl alcohol)films[J].Radiation Physics&Chemistry,2016,118:21-26.
[14]Karimi A,Daud W M A W.Comparison the properties of PVA/Na+-MMTnanocomposite hydrogels prepared by physical and physicochemical crosslinking[J].Polymer Composites,2016,37(3):897-906.
[15]Lowe A B,McCormick C L.Synthesis and solution properties of zwitterionic polymers[J].Chemical Reviews,2002,102(11):4177-4189.
[16]Gao M,Gawei K,Stokke B T.Polyelectrolyte and antipolyelectrolyte effects in swelling of polyampholyte and polyzwitterionic charge balanced and charge offset hydrogels[J].European Polymer Journal,2014,53(1):65-74.
[17]Xiao S,Ren B,Huang L,et al.Salt-responsive zwitterionic polymer brushes with anti-polyelectrolyte property[J].Current Opinion in Chemical Engineering,2018,19:86-93.
[18]Chen H,Wang Z M,Ye Z B,et al.The solution behavior of hydrophobically associating zwitterionic polymer in salt water[J].Journal of Applied Polymer Science,2013,131(1):1-15.
[19]Wang Zimin(王梓民),Lv Lei(吕雷),Zhang Shuxia(张淑侠),et al.A novel thickerner and the preparation method:CN104945562B[P].2017-11-24.
[20]Chen Hong(陈洪),Wang Zimin(王梓民),Ye Zhongbin(叶仲斌),et al.A salt-resistant polybetain and the preparation method:CN102585092B[P].2013-10-09.
[21]Xiao C,Yang M.Controlled preparation of physical cross-linked starch-g-PVA hydrogel[J].Carbohydrate Polymers,2006,64(1):37-40.
[22]Xie Xinling(谢新玲),Xiong Haiwu(熊海武),Tong Zhangfa(童张法),et al.Adsorption properties and kinetic study of Cu2+removal using five kinds of modified starches[J].Journal of Functional Materials(功能材料),2017,48(2):2009-2012.
[23]Jiang Haiyan(江海燕).Studies on the adsorption behavior of main heavy metal ions in environmental wastewater by modified polyvinyl alcohol[D].Chengdu:Chengdu University of Technology(成都理工大学),2017.
[24]Liu W,Cheng L,Yao X,et al.Adsorption studies for the acrylic polyester hyper-dispersant on titanium dioxide[J].Journal of Dispersion Science&Technology,2016,38(1):33-39.
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