化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (3) : 119-122.

新材料与新技术

PVP-Cu(Ⅱ)/SiO₂复合物的清洁制备及其吸附性能研究

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Study on clean synthesis of PVP-Cu(Ⅱ)/SiO₂ composite and its adsorptive capacity

Yang Zhen, Wang We,i Yu Shuai, Wang Jide, Cao Liqin

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Received		Published
2016-12-02		2018-03-20
Issue Date	Revised Date
2018-04-09	2016-12-02

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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。

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 20MPa and crosslinker mass fraction of 30%.The adsorption amount can reach as high as 600mg/g.

关键词

超临界二氧化碳 / 改性硅胶 / 高分子-金属配合物 / 蛋白质吸附

Key words

supercritical carbon dioxide / modified silica / polymer-metal complexe / protein adsorption

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PVP-Cu(Ⅱ)/SiO₂复合物的清洁制备及其吸附性能研究[J]. 化工新型材料, 2018, 46(3): 119-122 DOI:

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