Studies On Design, Synthesis And Properties Of Isocynate Based Microporous Organic Polymers

In Over the past decades,more than one team in the world launched a series of studies on Microporous Organic Polymers and the recent development of polymer-based microporous materials may provide new opportunities in hydrogen storage and heterogeneous catalysis, as organic materials have certain advantages over other materials.In contrast with traditional microporous materials such as activated carbon and zeolite, MOPs have a range of potential advantages for applications：composed with light elements,such as C,H,O,N and B;the pore can be tailored by organic chemistry methods;Mops have diversitysurface-characters and can be functionalized; to the harsh environment shows good stability. Herein we report the synthesis and catalytic application of microporous polyisocyanurate (PICU) composed of rigid carbon and nitrogen networks.The paper are consist of three parts:(1)By researching on the trimerization of diisocyanates (TDI、PPDI and TODI) and the post crosslinking reaction to obtain polyisocyanurate (PICU) composed of rigid carbon and nitrogen networks;(2)Techniques such as FT-IR,GPC,SEM and BET are used to investigate the suface characters of PICU;(3)Use special technique to obtain2D-nanosheet.DMAP can catalyze the trimerization of diisocyanates effectively,further more based on this reaction we can obtain PICU composed of rigid carbon and nitrogen networks. TDI,PPDI and TODI are excellent monomers used to synthesis PICU,but they shows different potential in this work. The ability of forming microporous materials is TDI>TODI>PPDI,this can be attributed to their structural characteristics: the irregular structure of TDI makes the network can not be interfingering easily and this makes the pore sirface conserved. By same reason, TODI can be moreporous than PPDI. In addition,low monomer concentration are favorable for the formation of pores.