Department of Materials Science and the Key Laboratory of Molecular Engineering of Polymers of MOE, the Advanced Coating Research Center of MOE, Fudan University, Shanghai 200433, PR China.
Langmuir. 2010 Sep 7;26(17):14271-5. doi: 10.1021/la102256t.
This paper presents a "one-spot" procedure to fabricate polystyrene/silica (PS/SiO(2)) hybrid hollow spheres. In this approach, when poly(vinylpyrrolidone)-stabilized PS colloids were deposited by sol-gel derived silica layer under acidic medium, it was interesting to find that the PS/SiO(2) core-shell colloids gradually changed to hollow structure spontaneously in the same medium as reaction went on. The formation of this hollow structure should be attributed to the diffusion of PS macromolecular chains from core particles into the voids between silica nanoparticles driven by the strong capillary force.
本文提出了一种制备聚苯乙烯/二氧化硅（PS/SiO₂）杂化空心球的“一步法”。在该方法中，当聚（N-乙烯基吡咯烷酮）稳定的 PS 胶体在酸性介质中通过溶胶-凝胶衍生的二氧化硅层沉积时，有趣的是发现随着反应的进行，PS/SiO₂核壳胶体在相同的介质中逐渐自发地转变为空心结构。这种空心结构的形成归因于 PS 大分子链从核颗粒扩散到二氧化硅纳米颗粒之间的空隙中，这是由强毛细力驱动的。
