【摘要】：陽離子型聚丙烯酰胺作為絮凝劑廣泛應(yīng)用于國內(nèi)外水處理領(lǐng)域,但隨著污水排放量的不斷增加和污水成分日益復(fù)雜,提高應(yīng)用性能,尋找經(jīng)濟、高效的污水處理方法是亟待解決的問題。本論文將自制的表面活性單體十二烷基-二甲基-(3-甲基丙烯酰胺基)丙基溴化銨(DMPC12)作為疏水單體與陽離子單體丙烯酰氧乙基三甲基氯化銨(DAC)和丙烯酰胺單體(AM)進行水溶液自由基共聚合,合成了新的三元共聚物疏水改性陽離子聚丙烯酰胺。主要工作如下：1.表面活性單體合成N-(3-二甲胺基)丙基甲基丙烯酰胺(DMAPMA)與溴代十二烷通過季按化反應(yīng),制備得到白色粉狀樣品,經(jīng)紅外光譜表征分析,確認該樣品為目標產(chǎn)物十二烷基-二甲基-(3-甲基丙烯酰胺基)丙基溴化銨(DMPC12)。2.疏水改性陽離子聚丙烯酰胺合成采用水溶液自由基聚合,光引發(fā)與熱引發(fā)的復(fù)合引發(fā)體系,合成DMPC12、DAC和AM的三元共聚物�？疾炜倖误w濃度、復(fù)合引發(fā)體系的引發(fā)劑用量及疏水單體的摩爾含量等因素對共聚物相對分子量、水不溶物和殘余單體等指標的影響,經(jīng)實驗研究,在聚合引發(fā)溫度為10℃,總單體濃度為30wt%,光引發(fā)劑1-羥基環(huán)己基苯甲酮(184)用量25ppm,熱引劑偶氮二異丁基脒鹽酸鹽(AIBA)用量20ppm,疏水單體摩爾含量低于0.5%時,可合成相對分子量達到1000萬,水不溶物少于0.2%,殘余單體含量低于500ppm的樣品。經(jīng)紅外光譜表征分析,該樣品為目標產(chǎn)物P(AM-DAC-DMPC 12),即疏水改性陽離子聚丙烯酰胺絮凝劑。3.含油污水處理應(yīng)用研究對CENOVUS ENERGY公司含油污水進行絮凝研究,考察絮凝劑P(AM-DAC-DMPC12)的相對分子量、陽離子單體摩爾含量、疏水單體摩爾含量及絮凝劑投加量等因素對除油率和CODcr去除率的影響,經(jīng)實驗研究,在絮凝劑相對分子量1050萬,疏水單體摩爾含量為0.5%,陽離子單體摩爾含量為30%,投加量為35mg·L-1時,除油率達到95.1%,CODcr去除率達到94.7%,與北京恒聚公司陽離子聚丙烯酰胺絮凝劑CPAM相比,除油率提高了8%,CODcr去除率提高了9%。由實驗結(jié)果可知,在陽離子聚丙烯酰胺共聚物中引入疏水側(cè)鏈,增加了絮凝劑的疏水締合作用,提高了其對有機物質(zhì)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，

本文編號：2320346