新型疏水改性阳离子聚丙烯酰胺的合成及污水处理应用研究
发布时间：2018-11-09 11:57
【摘要】：阳离子型聚丙烯酰胺作为絮凝剂广泛应用于国内外水处理领域,但随着污水排放量的不断增加和污水成分日益复杂,提高应用性能,寻找经济、高效的污水处理方法是亟待解决的问题。本论文将自制的表面活性单体十二烷基-二甲基-(3-甲基丙烯酰胺基)丙基溴化铵(DMPC12)作为疏水单体与阳离子单体丙烯酰氧乙基三甲基氯化铵(DAC)和丙烯酰胺单体(AM)进行水溶液自由基共聚合,合成了新的三元共聚物疏水改性阳离子聚丙烯酰胺。主要工作如下：1.表面活性单体合成N-(3-二甲胺基)丙基甲基丙烯酰胺(DMAPMA)与溴代十二烷通过季按化反应,制备得到白色粉状样品,经红外光谱表征分析,确认该样品为目标产物十二烷基-二甲基-(3-甲基丙烯酰胺基)丙基溴化铵(DMPC12)。2.疏水改性阳离子聚丙烯酰胺合成采用水溶液自由基聚合,光引发与热引发的复合引发体系,合成DMPC12、DAC和AM的三元共聚物。考察总单体浓度、复合引发体系的引发剂用量及疏水单体的摩尔含量等因素对共聚物相对分子量、水不溶物和残余单体等指标的影响,经实验研究,在聚合引发温度为10℃,总单体浓度为30wt%,光引发剂1-羟基环己基苯甲酮(184)用量25ppm,热引剂偶氮二异丁基脒盐酸盐(AIBA)用量20ppm,疏水单体摩尔含量低于0.5%时,可合成相对分子量达到1000万,水不溶物少于0.2%,残余单体含量低于500ppm的样品。经红外光谱表征分析,该样品为目标产物P(AM-DAC-DMPC 12),即疏水改性阳离子聚丙烯酰胺絮凝剂。3.含油污水处理应用研究对CENOVUS ENERGY公司含油污水进行絮凝研究,考察絮凝剂P(AM-DAC-DMPC12)的相对分子量、阳离子单体摩尔含量、疏水单体摩尔含量及絮凝剂投加量等因素对除油率和CODcr去除率的影响,经实验研究,在絮凝剂相对分子量1050万,疏水单体摩尔含量为0.5%,阳离子单体摩尔含量为30%,投加量为35mg·L-1时,除油率达到95.1%,CODcr去除率达到94.7%,与北京恒聚公司阳离子聚丙烯酰胺絮凝剂CPAM相比,除油率提高了8%,CODcr去除率提高了9%。由实验结果可知,在阳离子聚丙烯酰胺共聚物中引入疏水侧链,增加了絮凝剂的疏水缔合作用,提高了其对有机物质的絮凝能力,提高了絮凝效果。
[Abstract]:Cationic polyacrylamide is widely used as flocculant in water treatment field at home and abroad. However, with the increasing of sewage discharge and the increasing complexity of wastewater composition, the application performance is improved and the economy is sought. Efficient sewage treatment is an urgent problem to be solved. In this paper, the self-made surface active monomer dodecyldimethyl- (3-methylacrylamide) propyl ammonium bromide (DMPC12) was used as hydrophobic monomer and cationic monomer acryloxyethyl trimethylammonium chloride (DAC) and C as hydrophobic monomer and cationic monomer. Free radical copolymerization of (AM) was carried out in aqueous solution. A new terpolymer hydrophobic modified cationic polyacrylamide was synthesized. The main work is as follows: 1. N- (3-dimethylamino) propylmethacrylamide (DMAPMA) was synthesized by surface active monomer and reacted with bromododecane to prepare white powder samples. The sample was identified as the target product of dodecyldimethyl- (3-methacrylamido) propyl ammonium bromide (DMPC12). The hydrophobic modified cationic polyacrylamide was synthesized by free radical polymerization in aqueous solution, photoinitiator and thermally initiated composite initiator system. The terpolymer of DMPC12,DAC and AM was synthesized. The effects of the concentration of total monomer, the amount of initiator and the mole content of hydrophobic monomer on the relative molecular weight, water insoluble matter and residual monomer of the copolymer were investigated. The experimental results showed that the initiator temperature was 10 鈩，
本文编号：2320346
[Abstract]:Cationic polyacrylamide is widely used as flocculant in water treatment field at home and abroad. However, with the increasing of sewage discharge and the increasing complexity of wastewater composition, the application performance is improved and the economy is sought. Efficient sewage treatment is an urgent problem to be solved. In this paper, the self-made surface active monomer dodecyldimethyl- (3-methylacrylamide) propyl ammonium bromide (DMPC12) was used as hydrophobic monomer and cationic monomer acryloxyethyl trimethylammonium chloride (DAC) and C as hydrophobic monomer and cationic monomer. Free radical copolymerization of (AM) was carried out in aqueous solution. A new terpolymer hydrophobic modified cationic polyacrylamide was synthesized. The main work is as follows: 1. N- (3-dimethylamino) propylmethacrylamide (DMAPMA) was synthesized by surface active monomer and reacted with bromododecane to prepare white powder samples. The sample was identified as the target product of dodecyldimethyl- (3-methacrylamido) propyl ammonium bromide (DMPC12). The hydrophobic modified cationic polyacrylamide was synthesized by free radical polymerization in aqueous solution, photoinitiator and thermally initiated composite initiator system. The terpolymer of DMPC12,DAC and AM was synthesized. The effects of the concentration of total monomer, the amount of initiator and the mole content of hydrophobic monomer on the relative molecular weight, water insoluble matter and residual monomer of the copolymer were investigated. The experimental results showed that the initiator temperature was 10 鈩，
本文编号：2320346
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