Preparation And Properties Of Silicone Polyacrylate Porous Materials Via High Internal Phase Emulsions Templates Method

Low density, high porosity polymer porous materials have wide range of researches and applications, its research field across the mathematics, physics, chemistry, biology, materials, energy, computer and other subjects, which can be used in adsorption separation, catalysis, sensor, molecular recognition, biological tissue engineering and environmental science. Therefore there is important meaning in synthesis and modification research for this kind of material.Highly porous polyacrylate foams (polyHIPEs) are successfully prepared by olymerization of butyl acrylate (BA),2-ethylhexyl acrylate (EHA), ethyleneglycol dimethacrylate (EGDMA), divinyl benzene (DVB), methacryloxypropyl trimethoxy silane (MPS) using the high internal phase emulsions template. The morphologies, thermal properties, and the absorbing effects of Rhodamine B of the polyHIPEs are investigated by SEM, FTIR, TGA and UV-vis in this paper. The results show that:1. The polyHIPEs (BA/EHA/DVB) voids increase with the ratio of BA to EHA increasing. In polyHIPEs (BA/EHA/EGDMA), the voids diameter decrease with dispersed phase volume reducing. Adding toluene, there are obvious pores on the wall, the existence of the pores has greatly increase the specific surface area of the porous materials. The voids of porous material are more closely, orderly and small using divinylbenzene as crosslinking agent than those using ethyleneglycol dimethacrylate. Using DVB as crosslinking agent, the decomposition temperature of the sample is higher than using EGDMA sample about60℃. The carbonation decomposition temperature of the sample with20v%toluene is lower than other sample60～70℃. In50ml Rhodamine B aqueous solution of2×10-5mol/L, the adsorption rate increases with the quality of the porous materials increasing, and1.5g is the most appropriate quality. Adsorption rate increases with adsorption time improving, and after36h adsorption decolorizing effect best, basically around24h time adsorption completely. Porous material adsorption rate increase with porous material dispersed phase volume improving. The porous material using DVB as crosslinking agent has more uniform void size distribution, big specific surface area, adsorption effect for rhodamine B than using EGDMA. 2. With33v%MPS (in continuous phase), the voids of material are most closely and uniform, and the specific surface area of the material is highest. But MPS increasing, specific surface area has a downward trend and the material surface rough and irregular. MPS make porous material thermal stability improve, and33v%is the best amount. In50ml Rhodamine B aqueous solution of2×10-5mol/L, adsorption for Rhodamine B aqueous solution of samples adding MPS has obvious ascension. Because sample adding MPS has more small voids, and the distribution is more uniform, and the best addition amount is33.3v%.3. With20v%Span-80(relative to the volume of continuous phase) the emulsion is rare, the voids are large. Add silica-sol, the thermal decomposition temperature of the sample increase60℃. In50ml Rhodamine B aqueous solution of2×10-5mol/L, samples with adding silica-sol have strong adsorption.