紫外光引发聚合P(AM-MAPTAC)及其响应面优化制备
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摘要
以丙烯酰胺(AM)与甲基丙烯酰胺丙基三甲基氯化铵(MAPTAC)为共聚单体,通过紫外光引发聚合法制备阳离子聚丙烯酰胺絮凝剂P(AM-MAPTAC)。通过红外光谱(IR)与差热热重分析(TG/DSC)分别对P(AM-MAPTAC)进行结构表征与热稳定性分析,并采用响应曲面法得到优化制备条件:反应体系pH为4.75,引发剂v-044质量分数为0.07%,EDTA-2Na质量分数为0.20%,n(MATPAC)/n(AM)为0.33,光照时间为60min。在优化条件下制备P(AM-MAPTAC)絮凝剂,特性粘度可达14.72dL/g,通过污泥脱水实验可验证该特性粘度下的污泥脱水效果最好,滤饼含水率(FCMC)达70%,污泥比阻(SRF)达6.94×10~(12)m/kg,上清液剩余浊度达9.70NTU,污泥脱水效果优于市售常用絮凝剂。
The cationic polyacrylamide flocculant P(AM-MAPTAC) was prepared by polymerizing acrylamide(AM)and methacrylamide propyl trimethyl ammonium chloride(MAPTAC)under UV irradiation conditions.Determination the structural features and thermal stability of P(AM-MAPTAC)by IR and TG/DSC.The Response Surface Method was used to obtain the optimum preparation conditions:pH 4.75,initiator mass fraction 0.07%,EDTA-2Na mass fraction 0.20%,MATPAC/AM molar ratio0.33,illumination time 60 min.Under optimal conditions,the intrinsic viscosity of P(AM-MAPTAC)reached 14.72dL/g,under this condition,P(AM-MAPTAC)showed the best effect of sludge dewatering,FCMC 70%,SRF 6.94×10~(12)m/kg,tubidity 9.70 NTU.
The cationic polyacrylamide flocculant P(AM-MAPTAC) was prepared by polymerizing acrylamide(AM)and methacrylamide propyl trimethyl ammonium chloride(MAPTAC)under UV irradiation conditions.Determination the structural features and thermal stability of P(AM-MAPTAC)by IR and TG/DSC.The Response Surface Method was used to obtain the optimum preparation conditions:pH 4.75,initiator mass fraction 0.07%,EDTA-2Na mass fraction 0.20%,MATPAC/AM molar ratio0.33,illumination time 60 min.Under optimal conditions,the intrinsic viscosity of P(AM-MAPTAC)reached 14.72dL/g,under this condition,P(AM-MAPTAC)showed the best effect of sludge dewatering,FCMC 70%,SRF 6.94×10~(12)m/kg,tubidity 9.70 NTU.
引文
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[5]LIAO Y,ZHENG H L,QIAN L,et al.UV-initiated polymerization of hydrophobically associating cationicpolyacrylamide modified by a surface-active monomer:A comparative study of synthesis,characterization,and sludgedewatering performance[J].Industrial&Engineering Chemistry Research,2014,53(27):11193-11203.
[6]曹建苹,张胜,韩宝丽.阳离子型聚丙烯酰胺絮凝剂的合成与表征[J].北京化工大学学报,2011,38(4):52-57.CAO J P,ZHANG S,HAN B L.Synthesis and characterization of a cationic polyacrylamide flocculant[J].Journal of Beijing University of Chemical Technology,2011,38(4):52-57.(in Chinese)
[7]蒋绍阶,冯欣蕊,李晓恩,等.响应面法优化制备PACPDMDAAC杂化絮凝剂及其表征[J].化工学报,2014,6(2):731-736.JIANG S J,FENG X R,LI X E,et al.Preparation of PAC-PDMDAAC hybrid flocculant by response surface methodand its characterization[J].CIESC Journal,2014,6(2):731-736.(in Chinese)
[8]PALANIKUMAR K.Modeling and analysis for surface roughnessin machining glass fibre reinforced plastics using responsesurface methodology[J].Materials&Design,2007,28(10):2611-2618.
[9]袁群,葛红花,蒋以奎,等.模拟冷却水中Al2O3纳米颗粒分散条件的优化[J].功能材料,2015,46(37):23101-23105.YUAN Q,GE H H,JIANG Y K,et al.Optimization of dispersion conditions of Al2O3 nanoparticlesin simulated cooling water[J].Journal of Functional Materials,2015,46(37):23101-23105.(in Chinese)
[10]WANG X,YUE Q,GAO B,et al.Dispersion copolymerization of acrylamide and dimethyl diallyl ammonium chloride in ethanol-water solution[J].Journal of Applied Polymerscience,2011,120(3):1496-1502.
[11]POURJAVADI A,FAKOORPOOR S M,HOSSEINI S H.Novel cationic-modified salep as anefficientflocculating agent for settling of cement slurries[J].Carbohydr Polym,2013,93(2):506-511.
[12]ZHENG H L,LIAO Y,ZHENG M Z,et al.Photoinitiated polymerization of cationic acrylamide in aqueous solution:Synthesis,characterization,and sludge dewatering performance[J].The Scientific World Journal,2014,2014(11):10-23.
[13]YANG Z L,GAO B Y,LI C X,et al.Synthesis and characterization of hydrophobically associating cationic polyacrylamide[J].Chemical Engineering Journal,2010,161(1):27-33.
[14]GHIMICI L,DRANCA I,DRAGAN S,et al.Hydrophobicallymodi?ed cationic polyelectrolytes[J].European Polymer Journal,2001,37:227-231.
[15]GUAN Q Q,ZHENG H L,ZHAI J,et al.Effect of template on structure and properties of cationicpolyacrylamide:Characterization and mechanism[J].Industrial&Engineering Chemistry Research,2014,53(14):5624-5635.
[16]HJORTH M,JORGENSEN B U.Polymer flocculation mechanism in animal slurry established by charge neutralization[J].Water Research,2012,46(4):1045-1051.