Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6.
Langmuir. 2011 Jan 18;27(2):575-81. doi: 10.1021/la1038427. Epub 2010 Dec 13.
A novel method for the preparation of concentrated, colloidally stable, translucent polymer nanolatexes is presented. Herein nanolatexes are obtained from emulsion polymerization, utilizing the potential of catalytic chain transfer to enhance the particle nucleation efficiency. Low amounts of emulsifier are required (<8% w/w based on monomer) while the nanolatexes concentration can be increased to 40% w/w. The nanolatexes are translucent in appearance, which was correlated to the average particle size and width of the particle size distribution using Mie theory. Increasing the nanolatex concentration was found to have no deteriorating effect on either the optical or colloidal properties. Preparing translucent nanolatexes via this method is advantageous, as the amount of emulsifier is significantly reduced without sacrificing the optical transparency or the high interfacial surface area of the polymer colloids.
本文提出了一种制备高浓度、胶体稳定、半透明聚合物纳米胶乳的新方法。该方法利用催化链转移提高粒子成核效率，通过乳液聚合制备纳米胶乳。该方法仅需少量乳化剂（<8%w/w 基于单体），同时可将纳米胶乳浓度提高至 40%w/w。纳米胶乳外观半透明，这与使用 Mie 理论计算的平均粒径和粒径分布宽度有关。增加纳米胶乳浓度对光学和胶体性质没有不利影响。通过这种方法制备半透明纳米胶乳具有优势，因为在不牺牲聚合物胶体的光学透明度和高界面表面积的情况下，显著减少了乳化剂的用量。
