阳离子聚丙烯酰胺水包水乳液的扩试及应用
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摘要
在10 L双层玻璃反应釜中,以聚甲基丙烯酰氧乙基三甲基氯化铵为分散稳定剂,偶氮二异丁脒盐酸盐为引发剂,丙烯酰胺(AM)与甲基丙烯酰氧乙基三甲基氯化铵(DMC)在硫酸铵溶液中进行分散聚合,制备了阳离子聚丙烯酰胺(CPAM)水包水乳液。采用正交实验考察了单体总用量、单体摩尔比、硫酸铵用量、搅拌转速等对CPAM黏均相对分子质量和流动性的影响。以高岭土悬浮液为模拟废水,CPAM水包水乳液为絮凝剂,进行絮凝应用研究。实验结果表明,CPAM水包水乳液的最佳合成方案为单体总用量13%(w)、n(AM)∶n(DMC)=85∶15、硫酸铵用量33%(w)、搅拌转速230 r/min。在最佳絮凝条件为CPAM质量浓度3.0 mg/L、CPAM相对分子质量2.27×10~6、搅拌转速300 r/min、搅拌时间8 min、 pH=4的条件下,CPAM水包水乳液对高岭土悬浮液的除浊率最高可达97.07%。
In a 10 L double-glass reactor,cationic polyacrylamide(CPAM) water-in-water emulsion was prepared by the dispersion polymerization of acrylamide(AM) and methacryloxyethyl trimethyl ammonium chloride(DMC) in ammonium sulfate solution with poly(methacryloxyethyl trimethyl ammonium chloride) as the dispersion stabilizer and 2,2'-azobis(2-methylpropionamide)dihydrochloride as the initiator. The effects of experimental conditions(including the total concentration of monomers,the molar ratio of AM to DMC,the concentration of ammonium sulfate,and agitation rate) on the relative molecular weight and ?uidity of CPAM emulsion were investigated by orthogonal tests. The optimum synthesis method is as follows:the total amount of monomer is 13%(w),n(AM) ∶ n(DMC) 85 ∶ 15,w((NH4_)_2SO_4) is 33%,stirring rate is 230 r/min. The flocculation performance of CPAM emulsion was explored using kaolin suspension as simulated wastewater and CPAM emulsion as the ?occulant. The experimental results showed that the turbidity removal rate of kaolin could reached 97.07% by using CPAM emulsion,the optimum flocculation conditions are as follows:CPAM concentration 3.0 mg/L,CPAM relative molecular weight is 2.27×10~6,stirring rate is 300 r/min,stirring time is 8 min,pH 4.
In a 10 L double-glass reactor,cationic polyacrylamide(CPAM) water-in-water emulsion was prepared by the dispersion polymerization of acrylamide(AM) and methacryloxyethyl trimethyl ammonium chloride(DMC) in ammonium sulfate solution with poly(methacryloxyethyl trimethyl ammonium chloride) as the dispersion stabilizer and 2,2'-azobis(2-methylpropionamide)dihydrochloride as the initiator. The effects of experimental conditions(including the total concentration of monomers,the molar ratio of AM to DMC,the concentration of ammonium sulfate,and agitation rate) on the relative molecular weight and ?uidity of CPAM emulsion were investigated by orthogonal tests. The optimum synthesis method is as follows:the total amount of monomer is 13%(w),n(AM) ∶ n(DMC) 85 ∶ 15,w((NH4_)_2SO_4) is 33%,stirring rate is 230 r/min. The flocculation performance of CPAM emulsion was explored using kaolin suspension as simulated wastewater and CPAM emulsion as the ?occulant. The experimental results showed that the turbidity removal rate of kaolin could reached 97.07% by using CPAM emulsion,the optimum flocculation conditions are as follows:CPAM concentration 3.0 mg/L,CPAM relative molecular weight is 2.27×10~6,stirring rate is 300 r/min,stirring time is 8 min,pH 4.
引文
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[14]王玉峰,胡惠仁.阳离子聚丙烯酰胺水包水乳液的分散聚合及其应用[J].中国造纸,2009,28(2):26-31.
[15]中国石油和化学工业联合会.GB/T 31246-2014水处理剂阳离子型聚丙烯酰胺的技术条件和试验方法[S].北京:中国标准出版社,2014.
[16]段明,刘长坤,付秀峰.分散聚合法制备聚丙烯酰胺水分散体[J].石油化工,2007,36(10):1006-1011.
[2]Zhang Hongwei,Lai Qiujie,Xiao Xinrong.Preparation of nano-SiO2 modified branched cationic polyacrylamide and its application as paper strengthening agent[J].Chin Pulp Pap,2016,35(5):11-15.
[3]冯玉军,吕永利,李晓军,等.聚丙烯酰胺“‘水包水’乳液”:一类环境友好的水溶性聚合物新材料[J].精细与专用化学品,2009,17(6):11-15.
[4]Lee K E,Morad N,Teng T T,et al.Development,characterization and the application of hybrid materials in coagulation/flocculation of wastewater:A review[J].Chem Eng J,2012,203(5):370-386.
[5]Yang Bo,Sun Binbin.Synthesis of cationic polyacrylamide water-in-water emulsion[J].Contemp Chem Ind,2018,47(3):491-493,497.
[6]来水利,杨宁.阳离子聚丙烯酰胺絮凝剂的研制[J].应用化工,2011,40(5):860-863.
[7]Rabiee A,Ershadlangroudi A,Zeynali M E.A survey on cationic polyelectrolytes and their applications:Acrylamide derivatives[J].Rev Chem Eng,2015,31(3):239-261.
[8]Kleimann J,Gehindelval C,Auweter H,et al.Super-stoichiometric charge neutralization in particle-polyelectrolyte systems[J].Langmur,2005,21(8):3688-3698.
[9]杨博.分散聚合法制备阳离子聚丙烯酰胺水包水乳液[J].化学工程师,2018,32(3):8-11.
[10]Lee K E,Poh B T,Morad N,et al.Synthesis and characterization of hydrophobically modified cationic polyacrylamide with low concentration of cationic monomer[J].J Macromol Sci,A,2009,46(3):240-249.
[11]Ge Xuewu,Ye Qiang,Xu Xiangling,et al.Studies of inverse emulsion copolymerization of(2-methacryl-oyloxyethyl)trimethyl ammonium chloride and acrylamide[J].J Appl Polym Sci,2015,67(6):1005-1010.
[12]黄振,舒鑫,冉千平,等.阳离子聚丙烯酰胺水分散液的制备及表征[J].高分子学报,2013(8):1013-1019.
[13]傅智健,彭晓宏.阳离子聚丙烯酰胺水包水乳液分散聚合条件的研究[J].石油化工,2010,39(10):1140-1145.
[14]王玉峰,胡惠仁.阳离子聚丙烯酰胺水包水乳液的分散聚合及其应用[J].中国造纸,2009,28(2):26-31.
[15]中国石油和化学工业联合会.GB/T 31246-2014水处理剂阳离子型聚丙烯酰胺的技术条件和试验方法[S].北京:中国标准出版社,2014.
[16]段明,刘长坤,付秀峰.分散聚合法制备聚丙烯酰胺水分散体[J].石油化工,2007,36(10):1006-1011.