光引发合成两性离子型PAM的研究
发布时间：2018-08-19 15:58
【摘要】：两性聚丙烯酰胺(AmPAM)是一种分子内含有阴、阳离子基团水溶性高分子化合物,因有较好的溶解性、絮凝性、交联性、增粘性等优点,在水处理、造纸、石油和选矿等领域具有广泛的应用和发展前景。本文采用光引发方式,通过共聚法,选用三种不同阳离子单体甲基丙烯酰氧乙基三甲基氯化铵(DMC)、丙烯酰氧乙基三甲基氯化铵(DAC)、二甲基二烯丙基氯化铵(DMDAAC)分别于丙烯酰胺(AM)和丙烯酸钠(AANa)共聚,合成不同类型的AmPAM;研究了反应体系的单体配比、单体质量分数、引发剂的用量、光照时间、反应温度、溶液pH、尿素添加量等因素对产物特性粘数的影响,考察了聚合物的特性粘数和用量等因素对絮凝效果的影响。阳离子单体为DMC的两性聚丙烯酰胺P(AM-DMC-AANa)最佳合成条件:n(AM):n(NaAA):n(DMC)=1:0.63:0.14,单体质量分数为38%,引发剂用量为0.06%,光照时间为2h,反应温度为35℃,溶液pH为7.5,尿素添加量为3%,所得产物特性粘数为834.13mL/g,阳离子度为7.91%,阴离子度为35.59%,AM残留量为0.037%。红外光谱和核磁氢谱分析表明:所得产物符合P(AM-DMC-AANa)的结构特征;较佳絮凝条件为:特性粘数为834.13mL/g的絮凝剂用量为10mg/L,上清液透光率可达90%,沉降速率可达47cm/min。阳离子单体为DAC的两性聚丙烯酰胺P(AM-DAC-AANa)最佳合成条件:n(AM):n(AANa):n(DAC)=1:0.70:0.20,单体质量分数 30%,光引发剂用量 0.08%,光照时间2.5h,反应温度30℃,溶液pH为7,尿素添加量为5%;所得产品特性粘数为1022.37mL/g,阳离子度为10.53%,阴离子度为36.84%,AM残留量为0.031%。红外光谱和核磁氢谱分析表明:所得产物符合P(AM-DAC-AANa)的结构特征;较佳絮凝条件为:特性粘数为963.14mL/g的絮凝剂用量为10mg/L,上清液透光率可达98%,沉降速率可达58cm/min。阳离子单体为DMDAAC的两性聚丙烯酰胺P(AM-DMDAAC-AANa)最佳合成条件:在 n(AM):n(AANa):n(DMDAAC)=1:0.65:0.16,单体质量分数为32%,引发剂用量为0.08%,光照时间为2.5h,反应温度为30℃,溶液pH为6.5,尿素添加量为3%;所得产物特性粘数为912.16mL/g,阳离子度为8.73%,阴离子度为35.82%,AM残留量为0.033%。红外光谱和核磁氢谱分析表明:所得产物符合P(AM-DMDAAC-AANa)的结构特征。较佳絮凝条件为:特性粘数为912.16mL/g的絮凝剂用量为8mg/L,上清液透光率可达95%,沉降速率可达56cm/min。
[Abstract]:Amphoteric polyacrylamide (AmPAM) is a kind of water-soluble polymer compound with anionic and cationic groups, which has the advantages of good solubility, flocculation, crosslinking and viscosity, etc., in water treatment, papermaking, etc. Oil and mineral processing and other fields have a wide range of applications and development prospects. In this paper, photoinitiator and copolymerization are used. Three different cationic monomers, methacryloxy ethyl trimethylammonium chloride (DMC),) and (DAC), dimethyldiallylammonium chloride (DMDAAC), were copolymerized with acrylamide (AM) and sodium (AANa) respectively. The effects of monomer ratio, monomer mass fraction, amount of initiator, illumination time, reaction temperature, pH of solution and amount of urea on intrinsic viscosity of the product were studied. The effects of intrinsic viscosity and dosage of polymer on flocculation were investigated. The optimum conditions for the synthesis of amphoteric polyacrylamide P (AM-DMC-AANa) with cationic monomer DMC were as follows: 1: n (AM): n (NaAA): 1: 0.63: 0.14, mass fraction of monomer 38: 0.14, initiator dosage 0.06%, illumination time 2 h, reaction temperature 35 鈩，
本文编号：2192139
[Abstract]:Amphoteric polyacrylamide (AmPAM) is a kind of water-soluble polymer compound with anionic and cationic groups, which has the advantages of good solubility, flocculation, crosslinking and viscosity, etc., in water treatment, papermaking, etc. Oil and mineral processing and other fields have a wide range of applications and development prospects. In this paper, photoinitiator and copolymerization are used. Three different cationic monomers, methacryloxy ethyl trimethylammonium chloride (DMC),) and (DAC), dimethyldiallylammonium chloride (DMDAAC), were copolymerized with acrylamide (AM) and sodium (AANa) respectively. The effects of monomer ratio, monomer mass fraction, amount of initiator, illumination time, reaction temperature, pH of solution and amount of urea on intrinsic viscosity of the product were studied. The effects of intrinsic viscosity and dosage of polymer on flocculation were investigated. The optimum conditions for the synthesis of amphoteric polyacrylamide P (AM-DMC-AANa) with cationic monomer DMC were as follows: 1: n (AM): n (NaAA): 1: 0.63: 0.14, mass fraction of monomer 38: 0.14, initiator dosage 0.06%, illumination time 2 h, reaction temperature 35 鈩，
本文编号：2192139
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