A new class of polymeric colloids, multiple suspension particles (MSP), with a size of several micrometers consisting of many small polystyrene particles with a diameter below 100 nm grown in a poly (N-isopropyl acrylamide) precursor scaffold is obtained, as reported in our previous paper. Herein, the unique MSP are applied as template for silica nanocasting and hierarchically organized porous silica with raspberry-like aggregation structure is obtained. The aggregates with a diameter of about 1 μm are composed of thousands of hollow silica particles, which are with a size of about 70 nm originating from polystyrene particles and with mesopores of about 5.8 nm on the shell from PNIPAM chains. The aggregates have high specific surface area and pore volume. With the advantage of high mass transport contributed by macropores and of high specific surface area due to mesopores, the hierarchically organized structure has great potential application in catalysis field.

据报道，获得了一类新型的聚合物胶体，即多悬浮颗粒（MSP），其大小为几微米，由许多在聚（N-异丙基丙烯酰胺）前体支架中生长的直径小于100 nm的小聚苯乙烯颗粒组成。我们以前的论文。在此，将独特的MSP用作二氧化硅纳米浇铸的模板，并获得具有树莓状聚集结构的分级组织的多孔二氧化硅。直径约为1μm的聚集体由成千上万个中空的二氧化硅颗粒组成，这些颗粒的尺寸约为70 nm（源自聚苯乙烯颗粒），壳中的中孔（来自PNIPAM链）约为5.8 nm。聚集体具有高的比表面积和孔体积。