模板反相微乳液聚合法疏水缔合聚丙烯酰胺的合成研究  

Synthesis of hydrophobically associating polyacrylamide by template inverse microemulsion polymerization

作　　者：张丽华 Zhang Lihua(Chengdu University of Technology,Chengdu 614000,Sichuan,China)

机构地区：[1]成都理工大学工程技术学院,四川成都614000

出　　处：《橡塑技术与装备》2020年第10期9-16,共8页China Rubber/Plastics Technology and Equipment

摘　　要：阳离子疏水缔合聚丙烯酰胺(PDA)是在模板的存在下通过逆合成的微乳液聚合合成。二甲基辛烷(2-丙烯酰氨基)溴化铵(DOAB)是通过季铵化反应而合成,并用作疏水性单体。带相反电荷的DOAB聚丙烯酸(PAA)被用作模板。在反相微乳液中对DOAB的分布和PDA溶液黏度的行为进行了调查。结果表明,DOAB和PAA的配合物不仅位于反相微乳液液滴和油相界面,而且位于反相微乳液液滴的内部接口。使用模板制备的PDA溶液黏度(增稠能力)显著提高。当水相pH为6.5并且DOAB对PAA的比例为1时获得最佳增稠能力。PDA的增稠能力随DOAB含量的增加进行了改进。使用模板制备的PDA比没有使用模板制备的有较长疏水嵌段结构的PDA显示出较强的关联能力,这是通过荧光光谱图进一步支持获得。Cationic hydrophobically associated polyacrylamide (PDA) is synthesized by reverse synthesis microemulsion polymerization in the presence of a template.Dimethyloctane (2-acrylamido) ammonium bromide (DOAB) is synthesized by quaternization and used as a hydrophobic monomer.The oppositely charged DOAB polyacrylic acid (PAA) is used as a template.The behavior of DOAB distribution and viscosity of PDA solution is investigated in reverse microemulsion.The results show that the complex of DOAB and PAA is located not only at the interface between the inverse microemulsion droplet and the oil phase,but also at the internal interface of the inverse microemulsion droplet.The viscosity (thickening ability) of the PDA solution prepared using the template is significantly improved.The best thickening ability is obtained when the pH of the aqueous phase is 6.5 and the ratio of DOAB to PAA is 1.The thickening ability of PDA improves with the increase of DOAB content.The PDA prepared using the template shows stronger correlation ability than the PDA with a longer hydrophobic block structure prepared without using the template,which is further supported by the fluorescence spectrum.

关 键 词：微乳液聚合 反相微乳液 油相界面 增稠能力 嵌段结构 

分 类 号：TQ326.4[化学工程—合成树脂塑料工业]