Preparation And Properties Of Amino-Functionalized PS/PGMA Microspheres For Carbon Dioxide Adsorption

In recent decades, a large amount of carbon dioxide emission has caused global warming. For exhaust gases after combustion of fossil fuels, the main technique in industry for CO2 capture is the amine solution absorption method. In practical application, this method has disadvantages of high corrosivity and energy-intensive consumption, which confines its application prospects. Therefore, we propose a novel preparation of a polymer-based solid material which is loaded organic amine to solve the above problems.In this paper, amino-functionalized PS/PGMA nanoparticles material prepared by fine emulsion is the carbon dioxide adsorbent material. Firstly, a stable emulsion system is produced by strong mechanical agitation and emulsifier; then PS/PGMA nanoparticles are produced through free-radical copolymerization. Secondly, the particle size and distribution width of the PS/PGMA nanoparticles are controlled through the adjustment of the stirring rate, comonomer ratio, temperature, the emulsifier and volume fraction of the dispersed phase. Finally, we chose the smallest PS/PMMA nanoparticles. Fourier Infrared Spectrometer, laser particle analyzer, SEM, TEM, XPS and BET are used to characterize microstructure and chemical properties of the material. The results show that the minimum particle size of PS/PGMA nanoparticles is 67nm, with a large surface area and a large number of nanoparticles with reactive epoxy groups.The second part uses PS/PMMA nanoparticles as raw materials. By ring-opening reaction of surface epoxy group, ethylenediamine ?EDA?, tetraethylenepentamine ?TEPA? and 5-amino-tetrazole ?5-AT? were grafted to PS/PGMA nanoparticles surface, and three types of amino-functionalized nanoparticles are formed. Fourier Infrared Spectrometer, SEM and elemental analysis are used to characterize microstructure and chemical properties of the material and the material properties of carbon dioxide adsorption are studied. The results show that such nano-materials have many advantages such as fast adsorption rate, high selectivity, high adsorption capacity and good renewability. The maximum amount of adsorption of carbon dioxide adsorbent functionalized by EDA, TEPA and 5-AT are 2.54mmol·g^-1?1.52mmol·g^-1 and 0.92mmol·g^-1 respectively.