State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
J Phys Chem B. 2010 Mar 4;114(8):2593-601. doi: 10.1021/jp909115p.
A novel type of hollow polymeric particles was prepared according to a strategy consisting of three major steps: the synthesis of template particles (PMV) based on maleic anhydride/vinyl acetate; the formation of core/shell particles by using maleic anhydride/divinylbenzene as comonomers, AIBN as initiator, and PMV as templates; and the removal of the core by dissolving it with an organic solvent. This route gave rise to core/shell and hollow particles in high yields, and the as-prepared particles possessed obvious advantages. The size of the core and the thickness of the shell were controllable by adjusting the reaction conditions. The shells were of high rigidity and strength as a result of the high cross-linking degree. The surface anhydride groups offered a platform for various postfunctionalization reactions of the particles. The nanoscale pores in the shells enabled an encapsulation of target compounds. The as-prepared hollow particles could be applied as "nanoreactors". To attest to this concept, Ag-encapsulated composite particles were further prepared via redox reactions between NaBH(4) and AgNO(3) inside the hollow particles. A mechanism for the formation of core/shell particles and pores in the shells is proposed.
基于马来酸酐/醋酸乙烯酯的模板粒子（PMV）的合成；以马来酸酐/二乙烯基苯为共聚单体、AIBN 为引发剂、PMV 为模板形成核/壳粒子；以及用有机溶剂溶解核以去除核。这条路线以高产率得到了核/壳和中空粒子，并且所制备的粒子具有明显的优势。通过调整反应条件可以控制核的大小和壳的厚度。由于交联度高，壳具有高刚性和高强度。表面的酸酐基团为粒子的各种后功能化反应提供了一个平台。壳中的纳米级孔能够包封目标化合物。所制备的中空粒子可用作“纳米反应器”。为了证明这一概念，通过在中空粒子内部的 NaBH4 和 AgNO3 之间的氧化还原反应，进一步制备了 Ag 封装的复合粒子。提出了核/壳粒子和壳中孔形成的机理。
