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首页> 外文会议>International Conference on Surface and Colloid Science; 200309; Brazil >Recent results and perspectives on some aspects of latex film formation: drying, coalescence and distribution of additives
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Recent results and perspectives on some aspects of latex film formation: drying, coalescence and distribution of additives

机译：关于乳胶膜形成某些方面的最新结果和观点：干燥，聚结和添加剂分布

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Four monodisperse core-shell latices were synthesized for small-angle neutron scattering studies, differing in the acrylic acid content in the particle shell (1 or 4 wt %) and the glass-transition temperature of the acrylic core (around -40 or 10℃). The coalescence kinetics of the surfactant free latices was studied. It was shown that coalescence was hindered by an increase in the acrylic acid content of the shell, the pH of the latex and the glass-transition temperature of the core. These results could be inter- preted in terms of chain mobility in the shell and in the core. Labeled SDS was used to follow desorption of the surfactant during film formation. It was shown that desorption occurred early in the film formation process, when the latex still contained around 20% of water. A small fraction of the surfactant remained irreversibly adsorbed at the particle surface.
机译：合成了四种单分散核-壳胶乳用于小角度中子散射研究，其颗粒壳中的丙烯酸含量（1或4 wt％）和丙烯酸核的玻璃化转变温度（-40或10℃左右）有所不同）。研究了无表面活性剂胶乳的聚结动力学。结果表明，壳的丙烯酸含量，乳胶的pH值和核的玻璃化转变温度增加会阻碍聚结。这些结果可以用壳和核中的链移动性来解释。标记的SDS用于跟踪表面活性剂在膜形成过程中的解吸。结果表明，在乳胶形成过程中，当乳胶仍含有约20％的水时，就会发生脱附。一小部分表面活性剂不可逆地保留在颗粒表面。

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