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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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贯通多孔聚合物微球的制备及其应用
DOI: 10.11777/j.issn1000-3304.2015.15103, PP. 1449-1455
Keywords: 双重乳液,多孔微球,催化加氢,重金属离子的吸附
Abstract:
采用高内水相双重乳液模板法制备贯通多孔聚合物微球,并将其应用于催化剂负载和Cu2+吸附.首先,通过增加水相,使单一小分子表面活性剂12-丙烯酰氧-9-油酸(AOA)稳定的反相高内相乳液(W/OHIPEs)发生相转变,一步制备出高内水相双重乳液;然后以此为模板,采用辐射法和引发剂引发聚合两种方式制备聚(苯乙烯-二甲基丙烯酸乙二醇酯)微球.通过扫描电镜观察发现,采用辐射法聚合能够得到贯通多孔的聚合物微球,而化学法聚合只能得到中空的封闭微球.将贯通多孔微球水解使其羧基化,用于铜离子的吸附.结果表明水解后多孔微球对Cu2+的吸附量随pH值的增加先增后减,在pH=5时达到最高值175mg/g(2.75mmol/g).此外,利用原位生成的方式,在贯通多孔微球上负载Pd纳米粒子,并将其用于催化肉桂醛加氢反应.结果表明水解多孔微球比未水解多孔微球具有更高的催化效率;热重分析和透射电子显微镜观察显示,水解多孔微球比未水解多孔微球能够负载更多的Pd纳米粒子,且纳米粒子分散更均匀.
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