Study On The Application Of Silsequioxanes In Olefin Polymerization And Reduction Of P-nitrophenol

As a new type of material that is relatively hot in current research,organosilicon materials have become a hot topic for researchers,organosilicon sesquipolymers have many excellent properties,such as anti-aging,electrical insulation,etc.,and they are widely used in all aspects of production and life.The role of silicone organosilicon and its derivatives and organic-inorganic composite materials in production and life are becoming more important.Researchers have used chemical modification or copolymerization to introduce organosilicon into the inorganic framework,and successfully obtained a series of unique properties and micro mesopores.Structured organic-inorganic hybrid materials,these hybrid materials are widely used in catalysis,drug delivery,adsorption and other fields.Based on the research progress at home and abroad,the author successfully synthesized two porous silsesquioxanes using organic silicon as the basic raw material,and used the synthesized silsesquioxanes as the carrier.Studied the supported performance of silsesquioxanes composite materials in depth.The specific research content is as follows:1.In this thesis,two organosiloxane precursors containing different functional groups were successfully synthesized using organosilicon coupling agent(triethoxysilane),oxalyl chloride,etc.as basic raw materials.2.The two synthetic organic silicon monomers containing different functional groups were hydrolyzed and polycondensed to obtain silsesquiomers with larger specific surface area and microporous structure.Two synthetic organosiloxane sesquipolymers were used as supports for chemical loading of Zirconocene dichloride,and two supported metallocene composite catalysts were obtained,and the two supported metallocene catalysts were used for olefins such as ethylene.Polymerization,exploring the activity of composite catalysts in olefin polymerization.3.The silver nanoparticles supported by the above-synthesized silica sesquipolymer were used to prepare a metal silver-supported composite catalyst Ag@silsesquipolymer,and the composite catalyst was studied to catalyze the reduction of p-nitrophenol.The study found that the silver nanoparticles in the synthesized Ag@silsesquipolymer can be well dispersed on the surface of the organosilsesquipolymer carrier.