纳米SiO_(2)改性疏水缔合聚合物基的合成及性能评价

Synthesis and Performance Evaluation of Nano-SiO_(2) Modified Hydrophobic Associative Polymer

本文以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和丙烯酸(AA)为亲水单体,十六烷基二甲基烯丙基氯化铵(CDMAAC)为疏水单体,在纳米SiO_(2)的存在下,以EDTA/VA044/过硫酸铵/抗坏血酸为引发剂,通过自由基聚合法,合成了具有核壳结构的纳米SiO_(2)改性疏水缔合聚合物。分别通过红外光谱和扫描电镜对聚合物的结构及微观形态进行了表征,对聚合物的分子量和不同浓度的聚合物溶液的表观黏度进行了测定。结果表明,聚合物有较好的疏水缔合作用,纳米SiO_(2)的引入,使得聚合物水溶液的表观黏度、耐盐性能及耐酸碱性能得到明显的改善。

In this paper,acrylamide(AM),2-acrylamido-2-methylpropanesulfonic acid(AMPS)and acrylic acid(AA)were used as hydrophilic monomers,hexadecyl ally ammonium chloride(CDMAAC)as a hydrophobic monomer.In the presence of nano-SiO_(2),applied EDTA/VA044/ammonium persulfate/ascorbic acid as initiators,the nano-SiO_(2) modified hydrophobically associating polymer with a core-shell structure was synthesized by free radical polymerization.The structure and microscopic morphology of the polymer were characterize by infrared spectroscopy and scanning electron microscopy.At the same time,the molecular weight of the polymer and the apparent viscosity of the polymer solution at different concentrations were measured.The results showed that the polymer had good hydrophobicity.In association,the introduction of nano-SiO_(2) significantly improved the apparent viscosity,salt resistance and acid and alkali resistance of polymer aqueous solutions.