Graphene oxide as a sacrificial material for fabricating molecularly imprinted polymers via Pickering emulsion polymerization
Graphene oxide as a sacrificial material for fabricating molecularly imprinted polymers via Pickering emulsion polymerization
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氧化石墨烯作为通过皮克林乳液聚合制造分子印迹聚合物的牺牲材料
DOI：
10.1039/c6ra17672k
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发表时间：
2016-08
期刊：
影响因子：
3.9
通讯作者：
Zhong, Shian
中科院分区：
文献类型：
--
作者：
Huang, Shen;Hu, Yuwei;Chen, Qi;Zhong, Shian
首次引入氧化石墨烯（GO）作为牺牲材料，通过Pickering乳液聚合法制备了中空分子印迹聚合物（HMIP）。得到了稳定的水包油型Pickering乳液，并考察了影响乳液稳定性的最佳pH值。聚合后，使用氨溶液（pH = 11）通过超声处理剥离GO，并且暴露大量特异性结合位点。采用扫描电镜、傅立叶变换红外光谱、热重分析等手段对材料的理化性能进行了表征和分析。在5 min内可迅速达到平衡吸附，表现出优异的吸附效率，25 °C时平衡吸附容量为40.76 mg g−1。印迹因子约为2.62。选择性分析表明HMIP对模板双氯芬酸的亲和力和选择性高于甲芬那酸和卡马西平。
Graphene oxide (GO) was introduced as a sacrificial material, for the first time, to fabricate a hollow molecularly imprinted polymer (HMIP) via Pickering emulsion polymerization. A stable oil-in-water Pickering emulsion was obtained, and the optimum pH values affecting the stability of the emulsion were investigated. After polymerization, GO was peeled off using ammonia solution (pH = 11) via ultrasonication, and substantial specific binding sites were exposed. The physical and chemical properties of the material were characterized and analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The equilibrium adsorption could be reached rapidly within 5 min, showing excellent adsorption efficiency, and the equilibrium adsorption capacity was 40.76 mg g−1 at 25 °C. The imprinting factor was about 2.62. The selective analysis indicated a high affinity and selectivity of HMIP toward template diclofenac over mefenamic acid and carbamazepine.
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