在反应性乳化剂SE-10N存在下,采用预乳化半连续种子乳液聚合工艺合成了无皂纳米TiO_2/苯丙复合乳液,通过正交实验优化了合成工艺条件,并对复合乳液的性能进行了测试.结果表明,所制得的复合乳液稳定,其涂膜耐水性和硬度均优于同组成的有皂复合乳液,涂膜铅笔硬度可达到2H级,且纳米TiO_2的加入提高了无皂苯丙乳液涂膜的耐热性.对复合乳液进行透射电镜和动态光散射分析,结果表明无皂复合乳液乳胶粒的平均粒径为80 nm,且具有以纳米TiO_2为核、聚合物为壳的异常型核/壳结构.
The nano-TiO_2/surfactant-free styrene-acrylate composite latexes estabilized by reactive emulsifier(SE-10N) were synthesized by means of pre-emulsifying semibatch seeded polymerization.The conditions of synthesis technique were optimized and the properties of resultant composite latexes were tested.The results show that the water resistance and hardness of its coating film are superior to surfactant composite latex, and the coating film has a hardness up to 2H grade.The thermal gravimetric analysis results show that the composite latex film presents higher thermal stability than the latex film unmodified by the nanoparticles.The results of transmission electron microscopy (TEM) and the light scattering experiments show that the composite latexes particles exhibit a exceptional core-shell structure with nanometer TiO_2 as core and organic polymer as shell.
参考文献
| [1] | Yang SF;Xiong PT;Gong T;Lu DP;Guan R .St-BA copolymer emulsions prepared by using novel cationic maleic dialkyl polymerizable emulsifier[J].European Polymer Journal,2005(12):2973-2979. |
| [2] | 钱翼清,范牛奔.烷基化纳米SiO2/MMA核壳无皂乳液聚合、产物表征及其应用[J].高分子材料科学与工程,2002(04):69-73. |
| [3] | 殷年伟,陈克强,卢新安.超声波无皂乳液制备BA/AM/纳米SiO2复合材料[J].高分子材料科学与工程,2004(03):216-219,223. |
| [4] | 邵谦,王成国,朱云峰,葛圣松.用于合成纳米苯丙乳液的纳米TiO2表面改性及表征[J].功能材料,2006(04):642-645. |
| [5] | 邵谦,孟庆超,徐小琳,王成国.反应性乳化剂存在下的五元苯丙乳液共聚合[J].化学研究与应用,2006(11):1293-1296. |
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