低乳化剂含量丙烯酸酯微乳液的合成与性能

Synthesis and performance of acrylate micro-emulsion with low emulsifier content

研究了搅拌速度、聚合温度、复合乳化剂类型和质量分数、p H值、引发剂加入方式对丙烯酸酯微乳液稳定性、粒径及透光率的影响。结果表明：采用预乳化补加助乳化剂、引发剂聚合法,搅拌速度为120~160 r/min,聚合温度为75~76℃,复合乳化剂AES（脂肪醇聚氧乙烯醚硫酸钠）/OP–10（辛基酚聚氧乙烯醚）的质量分数为2%、m（AES）：m（OP–10）=3：1时,制备的微乳液具有良好的稳定性,透光率为68.7,凝胶率为0。采用透射电镜和衰减全反射（ATR）红外光谱对微乳液的结构进行表征,显示微乳液的平均粒径为40 nm,该微乳液为丙烯酸酯类聚合物。

The influence of stirring speed, polymerization temperature, type and mass fraction of compound emulsifiers, p H value and initiator addition mode on stability, particle size and light transmittance of acrylate microemulsion was investigated. The results show that when the pre-emulsifying replenishing co-emulsifier and initiator polymerization method is used, the stirring speed is 120~160 r/min, the polymerization temperature is 75~76 ℃, the mass fraction of compound emulsifier composed of AES（fatty alcohol polyoxyethylene ether sodium sulfate） and OP-10（octylphenol polyoxyethylene ether） is 2%, m（AES） ： m（OP–10） = 3 ： 1, the prepared micro-emulsion possesses good stability, its light transmittance is 68.7, and the gel rate is 0. The structure of the micro-emulsion was characterized by using transmission electron microscopy and attenuated total reflectance（ATR） infrared spectrum. It shows that the average particle size of micro-emulsion is 40 nm, the micro-emulsion is acrylate type polymer.