基于细乳液聚合法TiO2/PMMA纳米复合粒子的制备及其性能

Preparation of Nanoscale TiO2/PMMA Composite Particles by Miniemulsion Polymerization

摘要:

采用细乳液聚合法制备了二氧化钛/聚甲基丙烯酸甲酯（TiO2/PMMA）纳米复合粒子，考察了引发剂、助乳化剂、乳化剂、单体结构和种类对TiO2/PMMA纳米复合粒子性能的影响。结果表明与十二醇和十六醇相比，十六烷（HD）更能抑制甲基丙烯酸甲酯（MMA）液滴的Ostwald熟化效应，当MMA占TiO2质量分数的60%，HD对单体质量分数的6%，可聚合乳化剂1-烯丙氧基-3-(4-壬基苯酚)-2-丙醇聚氧乙烯(10)醚硫酸铵（DNS-86）占整个体系的质量分数为2%时，制备TiO2/PMMA纳米复合粒子分散体的粒径为185nm，此时TiO2/PMMA纳米复合粒子与细乳液粒径差距较小；采用TiO2/PMMA纳米复合粒子制备白色涂料墨水的稳定性和遮盖力明显优于同等条件下TiO2所制备的涂料墨水。

Abstract:

The nanoscaleTiO2/PMMA composite particle was prepared via miniemulsion polymerization. The influences of co-emulsifier, emulsifier, monomer and initiator on properties of the dispersion were investigated. The results show that hexadecane (HD) was more effective to inhibit the Ostwald effect than that of cetyl alcohol (CA) and dodecanol(LA). When the mass ratio of MMA and TiO2, HD and MMA, DNS-86 based on the whole dispersion, was 60%, 6% and 2%, respectively, the particle size of nanoscale TiO2/PMMA composite particle was 185nm, which was similar to that of pre-emulsion under these conditions. The white ink prepared by nanoscale TiO2/PMMA composite showed higher hiding power and stability than that of by nanoscale TiO2.