| The problem of air pollution is still the main environmental problem concerned by the government and the people,among them,acid gas emission has a great impact on the environmental pollution of the atmosphere,Reducing the emissions from sources is one of the most effective measures to prevent pollution.The physical and chemical properties of ionic liquids have attracted the interest of most researchers at home and abroad.The characteristics and rapid development of environmentally friendly materials provide the possibility to capture pollutants in the atmosphere,it is expected to contribute to the improvement of atmospheric environmental pollution through research.Based on the unique physical and chemical properties of new Ionic liquids,a series of environmentally friendly materials with new structures are designed and prepared,it will provide the basic data support and increase the choice range of materials for future prevention and control of air pollution from the source.The research content of this paper is mainly divided into the following parts:1.Platinum-catalyzed selection and preparation of hydrosilylated siloxane coresBy comparing the application of transition metal platinum and its complexes at home and abroad for catalytic unsaturated hydrocarbons and hydrosilylation,to find catalysts that are reasonably catalyzed for the hydrosilylation reaction that is beneficial to the synthesis of siloxane cores in this article,using hydrous chloroplatinic acid with octanol in the best selected by experiment to give a molar ratio of divalent platinum complex catalyst under optimum conditions,the catalytic addition of siloxanes to the reaction of unsaturated olefins gives high yields of ? ?addition products and some of the ?—addition products are hydrosilylated siloxane core products,the optimisation of the platinum catalyst makes it possible to catalyze the production of more ?—additional siloxane core nucleus substrates during the catalytic reaction,it provides an important foundation material for the design of the later Ionic liquid structure.2.Synthesis and Characterization of imidazole ionic liquids silicone central coreUsing the siloxane center nucleus as the skeleton core,the addition reaction of 1,3,5,7-tetramethylcyclotetrasiloxane(D4H)and chloromethylstyrene to obtain the chlorosiloxane center branch structure;N-methyl imidazole and 2-ethyl imidazole were added to give new branching ionic liquids with Cl-as anions and N-methyl(or 2-ethyl)siloxane central imidazole as cations,respectively;Chlorine-containing ionic liquids are easily oxidized at room temperature and pressure,so several new siloxane central nuclear ionic liquids are obtained by changing the type of anions on the branching chain(tetrafluoroborate ions,hexafluorophosphate ions,etc);Using the conventional two-step synthesis method to make further improvements,this paper obtained dendritic siloxane central imidazole ionic liquid[Bmim][Cl],[Bmim][BF4]and[Bmim][PF6]Siloxane central imidazole Ionic liquid is characterized by FT-IR,UV,SEM,etc.3.BF4-,PF6-imidazole ionic liquids silicone central core acid gas capture applicationIn this paper,the ability of several new ionic liquids to trap acid gas is discussed,and the absorption of acid gas by conventional ionic liquids is compared with that by conventional ionic liquids.This study focuses on three acidic gases:NO2/N2,CO2/N2,SO2/N2;Through the experimental absorption device,the rotor flowmeter is used to control the gas flow rate,and then through the safety bottle,drying device,and finally the acidic gas is absorbed and captured,and the corresponding absorption amount is:[Bmim[BF4],the absorption of acidic gases is:0.0576 for CO2,0.8721 for SO2,and 0.0112 for NOx;[Bmim][PF6],the absorption of CO2 is 0.0583,SO2 is 0.683,NOx is 0.0173,and the absorption of SO2 is the most significant when compared with the comparative absorption effect,the absorption of CO2 and NOx is also higher than that of conventional ionic liquids that capture acidic gases. |
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