【摘要】 以2-乙烯基吡啶（2VP）为单体,Cu（Ⅱ）为配位中心,改性硅胶为载体,偶氮二异丁腈为引发剂,N,N′-亚甲基双丙烯酰胺（BIS）为交联剂,在超临界二氧化碳（scCO₂）中通过沉淀聚合合成了交联的PVP-Cu（Ⅱ）/SiO₂复合物。通过傅里叶全反射红外光谱、热重分析仪、广角X射线衍射仪等对PVP-Cu（Ⅱ）/SiO₂复合物的结构和热稳定性进行了分析。考察了交联剂浓度和反应压力等对聚合反应的影响。利用PVP-Cu（Ⅱ）/SiO₂复合物对水溶液中的牛血清白蛋白（BSA）进行了吸附性能研究。结果表明,PVP-Cu（Ⅱ）与表面改性的SiO₂之间存在相互作用,合成的PVP-Cu（Ⅱ）/SiO₂复合物为非晶态,且其热稳定性有所提高。当压力为20MPa、BIS为30%（wt,质量分数）时,复合物的产率可达86%,最大吸附量可达600mg/g。更多还原

【Abstract】 Silicone-modified metal complexes（PVP-Cu（Ⅱ）/SiO₂）was synthesized via precipitation polymerization in supercritical carbon dioxide,using 2-vinylpyridine as monomer,Cu（Ⅱ）as the coordination center,modified silica as loading materials,azodiisobutyronitrileas initiator and N,N′-methylene-bisacrylamide as crosslinker.PVP-Cu（Ⅱ）/SiO₂ were characterized through Fourier transform infrared spectrometer（FT-IR）,thermal gravimetric（TG）and X-ray powder diffraction（XRD）.The effects of the crosslinker and reaction pressure were investigated.Additionally,the adsorption behavior of PVP-Cu（Ⅱ）/SiO₂ composites toward bovine serum albumin（BSA）were evaluated.Results showed the successful synthesis of PVP-Cu（Ⅱ）/SiO₂ with amorphous state.The thermal stability of PVP-Cu（Ⅱ）/SiO₂ was improved.There were the interaction between PVP-Cu（Ⅱ）and surface modified-SiO₂.The composites with a high yield of 86% was obtained when the pressure was 20 MPa and crosslinker mass fraction of 30%.The adsorption amount can reach as high as 600 mg/g.更多还原