纳米尺寸壳核型苯丙乳液的合成及应用

Synthesis and Application of Nanoparticles Core/Shell Styrene-acrylic copolymer latexes

摘要:

以苯乙烯（St）为硬单体，丙烯酸丁酯（BA）为软单体，N-羟甲基丙酰胺（NMA）为功能性单体，选用十二烷基硫酸钠（SDS）和辛基酚聚氧乙烯醚（OP-10）复合体系为乳化剂，过硫酸铵（APS）为引发剂，采用半连续乳液聚合法合成了苯丙乳液。通过对浸渍后汽车工业滤纸的性能检测确定了最佳反应配比。最佳配比下为：丙烯酸丁酯与苯乙烯比值为0.49，乳化剂用量为0.93%，引发剂用量为0.63%，N-羟甲基丙烯酰胺为5.3%。胶粒呈球形，粒径分布范围小粒径约为50nm。浸渍后滤纸的性能指标是耐破度大于350kPa，耐水性大于300min，透气度大于510L?m-2?s-1，挺度大于4.03mN.m。

Abstract:

Styrene (St) as hard monomer, butyl acrylate （BA）as soft monomer, N-Methylolacrylamide (N-MAM) as functional monomer, styrene/acrylic latexes was synthesized by semicontinuous emulsion polymerization. The performances of emulsion and impregnated auto-industry filter paper were examined and analyzed. The optimal condition of synthesizing emulsion was gained as that the best monomer compound of ST: BA was 0.49, the emulsifier’s dosage was 0.93%, the initiator’s dosage was 0.63%, the N-MAM’s dosage was 5.3%.The latex’s average particle diameter was 50nm and distributed equally. The performance indexes of impregnated filter paper were greater than 350kPa of bursting strength, more than 99min of water resistant property, over than 520L?m-2?s-1 of air permeability and at least 4.03 mN.m stiffness.