CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.
Langmuir. 2013 Sep 10;29(36):11440-8. doi: 10.1021/la401701z. Epub 2013 Aug 26.
A simple and facile approach was developed to fabricate raspberry-like or snowman-like particles via seeded dispersion polymerization by just changing the ratio of second monomer styrene (St) to seeds in which poly(styrene-co-hydrolyzed-methacryloxypropyltrimethoxysilane) [P(St-co-MPS)] latex was used as seeds with hydrolyzed-MPS as a cross-linking agent. The morphologies of final products were confirmed by field-emission scanning electron microscopy and transmission electron microscopy. Interestingly, the seed part of snowman-like particles showed raspberry-like with adsorbing quantities of PS particles while the other part smooth. The formation mechanism of the raspberry-like particles was also discussed. The superhydrophobic surface with both the static contact angle of 158° and high adhesion to water could be achieved by the hydrophobization of the particulate film with octadecyltrimethoxysilane that was formed from the raspberry-like particles decorated by a thin layer of silica nanoparticles. Further, through encapsulating Ag nanoparticles within the surface, the obtained raspberry-like PS/Ag/SiO2 nanocomposite particles exhibited excellent antibacterial property simultaneously.
通过种子分散聚合，我们开发了一种简单易行的方法来制备覆盆子状或雪人状颗粒，只需改变第二单体苯乙烯（St）与种子的比例即可，其中聚（苯乙烯-co-水解甲基丙烯酰氧基丙基三甲氧基硅烷）[P（St-co-MPS）]乳胶用作种子，水解 MPS 作为交联剂。通过场发射扫描电子显微镜和透射电子显微镜确认了最终产物的形态。有趣的是，雪人状颗粒的种子部分呈现出覆盆子状，吸附了 PS 颗粒，而其他部分则很光滑。还讨论了覆盆子状颗粒的形成机制。通过对由覆盆子状颗粒修饰的薄二氧化硅纳米颗粒层形成的颗粒膜进行疏水处理，可获得具有 158°静态接触角和对水高附着力的超疏水表面。此外，通过在表面内封装 Ag 纳米颗粒，所得到的覆盆子状 PS/Ag/SiO2 纳米复合材料颗粒同时表现出优异的抗菌性能。
