Recently, researchers from the State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, have devoted themselves to the study of the preparation and performance of complex complex colloids at multiple scales, and have achieved a series of research results. It has been proposed to prepare hollow microspheres with continuous adjustment of shell thickness and cavity size by using the core-shell structure gel colloid template technology. On this basis, a series of novel structures of composite colloids, such as double-shelled hollow microspheres and bionic structures with microprojections on the surface, were prepared by using porous hollow polymer colloids as templates and controlling the growth of the material.
With the support of the National Natural Science Foundation of China and the Chinese Academy of Sciences, the research group made new progress in the preparation of Janus colloids and proposed a new method for preparing Janus colloids. The relevant results were published in the recent Angew.Chem.Int.Ed. .2008, 47, 3973-3975).
It controls the composition and structure of the colloid and gives it its function. It has application prospects in many fields such as medical diagnosis, targeted therapy, controlled release, thermal /acoustic insulation, smart fluid, catalytic separation, high-efficiency sensing, functional packing and so on. This study involved many interdisciplinary subjects such as materials, medicine, information, energy, and the environment.
Janus colloid refers to a colloid that has double composition or nature and is a special functional colloid. The establishment of a controllable preparation method is a key issue. Especially in the process of preparing Janus colloids using Pickering emulsion, the rotation of the colloidal particles at the liquid-liquid interface has brought difficulties for its preparation. The researchers carried out the polymerization of the colloidal silica colloids adsorbed on the interface of the Pickering emulsion when the oil/water two are the same, and achieved the grafting reaction of the lipophilic and hydrophilic polymers, thereby inhibiting the rotation of the colloids at the interface and obtaining organic/ Inorganic composite Janus colloids. Through a series of experimental studies, a new method for preparing Janus colloids was proposed. Through the selective recombination of functional materials in specific regions, Janus colloids with other compositions and structures were prepared, which expanded the types of functional colloids and laid the foundation for their performance research and application.
