CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China and USTC-CityU Joint Advanced Research Center, Suzhou, PR China.
Macromol Rapid Commun. 2012 Nov 23;33(22):1945-51. doi: 10.1002/marc.201200437. Epub 2012 Aug 10.
Polystyrene (PS) microspheres coated with β-cyclodextrin (β-CD) were fabricated via γ-ray-induced emulsion polymerization in a ternary system of styrene/β-CD/water (St/β-CD/water). The solid inclusion complex of St and β-CD particles formed at the St droplets-water interface can stabilize the emulsion as the surfactant. TEM and XPS results showed that β-CD remains on the surface of PS particles. The average size of the PS particles increases from 186 to 294 nm as the weight ratio of β-CD to St rises from 5% to 12.5%. The water contact angle (CA) of PS latex film is lower than 90°, and reduces with the β-CD content even to 36°. Thus, this work provides a new and one-pot strategy to surface hydrophilic modification on hydrophobic polymer particles with cyclodextrins through radiation emulsion polymerization.
通过在苯乙烯/β-环糊精/水（St/β-CD/water）三元体系中进行γ射线引发的乳液聚合，制备了包覆β-环糊精（β-CD）的聚苯乙烯（PS）微球。St 液滴-水界面处形成的 St 和β-CD 颗粒的固溶体包络物可以作为表面活性剂稳定乳液。TEM 和 XPS 结果表明，β-CD 保留在 PS 颗粒的表面。随着β-CD 与 St 的重量比从 5%增加到 12.5%，PS 颗粒的平均粒径从 186nm 增加到 294nm。PS 乳胶膜的水接触角（CA）低于 90°，并且随着β-CD 含量的增加甚至降低到 36°。因此，这项工作通过辐射乳液聚合为通过环糊精对疏水性聚合物颗粒进行表面亲水改性提供了一种新的一锅法策略。
