(1. 廣東省稀有金屬研究所，廣州 510650； 2. 廣東省稀土開發(fā)及應(yīng)用重點(diǎn)實(shí)驗(yàn)室，廣州 510650)
摘 要: 以8-羥基喹啉與四氯化鍺配合物為模板、丙烯酰胺為功能單體、二甲基丙烯酸乙二醇酯為交聯(lián)劑、偶氮二異丁腈為引發(fā)劑、濃鹽酸為調(diào)整劑、氯仿為溶劑，采用雜化沉淀聚合法制備鍺離子印跡聚合物微球吸附材料，采用紅外光譜、掃面電鏡、比表面積及孔隙分析儀和熱重分析對其進(jìn)行表征。結(jié)果表明：印跡聚合物MIPs紅外光譜存在顯著的胺基、羧基和C—N伸縮振動特征峰，無芳香族伸縮振動特征峰出現(xiàn)，掃描電鏡顯示其以納米級微球結(jié)構(gòu)存在、形狀相似的空腔結(jié)構(gòu)，表明MIPs在洗脫過程中已將8-羥基喹啉與四氯化鍺配合物洗脫干凈。熱重分析表明，印跡聚合物MIPs較非印跡聚合物NIPs的熱穩(wěn)定性強(qiáng)，MIPs的起始分解溫度為354.28 ℃；吸附解吸實(shí)驗(yàn)表明，MIPs對鍺的吸附率為96.84%、解吸率為96.50%，MIPs對鍺的吸附容量為387.36 mg/g。
關(guān)鍵字: 鍺；印跡聚合物；微球；吸附；表征
（1. Guangdong Research Institute of Rare Metals, Guangzhou 510650, China; 2. Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangzhou 510650, China）
Abstract:Microspheric germanium ion imprinted polymer adsorption material was prepared by hybrid method, employing the complex of germanium tetrachloride and 8-Hydroxyquinoline as template, acrylamide as functional monomer, ethylene glycol dimethacrylate as cross-linker, azodiisobutyronitrile as initiator, hydrochloric acid as adjusting agent and chloroform as solvent, and characterized by IR, SEM, ASAP and TGA. The stretching vibration absorption peaks as amino, carboxyl, C—N without miscellaneous aromatic ring were detected in IR spectra, and the structure of nanoscale microspheres and similar cavity shows that the germanium tetrachloride and 8-Hydroxyquinoline are completely cleared in SEM spectra. The thermal stability of MIPs is better than that of NIPs, and the initial decomposition temperature of MIPs is 354.28 ℃. Adsorption and desorption experiment results show that the adsorption rate and desorption rate of MIPs for Germanium are 96.84% and 96.50%, respectively, and the adsorption capacity of MIPs for Ge is 387.36 mg/g.
Key words: germanium; imprinted polymer; microsphere; adsorption; characterization
