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以脂肪醇聚氧乙烯醚硫酸钠(AES)/辛基酚聚氧乙烯醚(OP-10)为阴/非离子型复合乳化剂,制备了低乳化剂含量的丙烯酸酯微乳液。探讨了搅拌速率、聚合温度、复合乳化剂类型和用量、pH值及聚合中期引发剂补加方式等对丙烯酸酯微乳液的稳定性、透光率、粒径及其分布等影响。结果表明:当搅拌速率为120~160 r/min、聚合温度为75~76℃、复合乳化剂中w(AES+OP-10)=2%且m(AES)∶m(OP-10)=3∶1时,丙烯酸酯微乳液的稳定性最高(凝胶率为0),并且其透光率为68.7%、平均粒径为37.8 nm且粒径分布较均匀。
A low emulsifier-content acrylate microemulsion was prepared with fatty alcohol polyoxyethylene ether sulfate (AES) / octylphenol polyoxyethylene ether (OP-10) as anionic / nonionic emulsifier. The effects of stirring speed, polymerization temperature, the type and amount of emulsifier, pH value and polymerization initiator on the stability, transmittance, particle size and distribution of acrylate microemulsion were discussed. The results showed that when AES (AES + OP-10) = 2% and m (AES): m (OP-10) = 2 were used in the emulsifier with the stirring rate of 120-160 r / min and the polymerization temperature of 75-76 ℃ 3: 1, the stability of acrylate microemulsion is the highest (gel fraction is 0), and its light transmittance is 68.7%, the average particle size is 37.8 nm and the particle size distribution is more uniform.