【作者】 曲荣君；

【导师】 成国祥；

【作者基本信息】 天津大学 ， 材料学， 2003， 博士

【摘要】 螯合树脂是一类能与金属离子形成多配位络合物的交联功能高分子材料，广泛应用于无机、冶金、分析、放射、药物、催化、海洋化学等领域。本文合成了六种新型螯合树脂，利用FTIR、XPS、SEM、WAXD、XRD等方法对所合成螯合树脂的结构和形态进行了表征，并分别研究了对Au3+、Ag+、Hg2+、Cu2+、Ni2+、Zn2+、Pb2+等金属离子的螯合吸附性能和机理。1．以羧甲基壳聚糖（CM-CTS）为蛇树脂，分别以尿素-甲醛树脂（UF）、二乙烯三胺和三乙烯四胺交联的双缩水甘油醚（B-62）为笼树脂，合成了三种具有蛇笼结构的螯合树脂，研究了树脂的合成条件、溶胀性质及其对Cu2+、Ni2+、Zn2+、Pb2+等离子的吸附动力学、热力学和吸附机理。2．以羧甲基纤维素（CMC）为蛇树脂，分别以二乙烯三胺和三乙烯四胺交联的双缩水甘油醚（B-62）为笼树脂，合成了两种具有蛇笼结构的螯合树脂，研究了树脂的合成条件、溶胀性质及其对Cu2+、Ni2+、Zn2+、Pb2+等金属离子的吸附动力学、热力学和吸附机理。3．在相转移催化剂存在下，球型大孔氯甲基化聚苯乙烯（PSC）与2-巯基乙醇（ME）反应得到新型含硫螯合树脂聚[4-（2-羟乙硫甲基）]苯乙烯(PSME)。研究了催化剂结构、反应时间、反应温度、溶剂等因素对反应的影响，并采用FTIR技术对反应进程进行了跟踪。4．研究了PSME树脂对Hg（II）、Ag（I）和Au（III）的吸附性能和吸附机理。XPS、SEM、WAXD、XRD及孔径分析等综合研究结果表明，在吸附过程中存在不同程度的氧化还原现象，其中树脂中的S原子被氧化成-SO-和-SO2-，而Hg（II）、Ag（I）和Au（III）则分别被还原为Hg（I）、Hg（0）、Ag（0）和Au（0）。更多还原

【Abstract】 Being an important branch of the polymer science, the chelating resin is a kind of cross-linked functional polymer material, which can form multi-coordinated complex with metal ions. This kind of resin is widely used in the fields of inorganic, metallurgy, analysis, radiation, pharmaceuticals, catalysis, and marine chemistry, etc.This thesis aimed at reporting six kinds of chelating resins synthesized by using new methods. The structures and patterns are characterized by FTIR, XPS, SEM, WAXD and XRD, etc. The properties of the chelating adsorption and the mechanism for Au3+, Ag+, Hg2+, Cu2+, Ni2+, Zn2+ and Pb2+ were studied.1. Two kinds of snake-cage type chelating resins were synthesized by using carboxymethyl chitosan (CM-CTS) as the snake resin, urea-formaldehyde resin (UF) and B-62 resin crosslinked by polyamine as the cage resins, respectively. The best synthesis conditions were studied, as well as the swelling properties and their adsorption dynamics, thermodynamics and adsorption mechanism towards Cu2+, Ni2+, Zn2+ and Pb2+.2. Two kinds of snake-cage type chelating resins were synthesized by using the carboxymethyl cellulose (CMC) as the snake resin, and the B-62 resin crosslinked by polyamine as the cage resin, The best synthesis conditions were studies, as well as the selling properties and their adsorption dynamics, thermodynamics and adsorption mechanism towards Cu2+, Ni2+, Zn2+ and Pb2+.3. A new type of sulfur-containing chelating resin poly[4-(2-hydroxyethylthiomethyl) styrene] (PSME) were synthesized by spherical porous cholromethylated polystyrene (PSC) reacted with 2-mercaptoethanol (ME) in the presence of the phase-transfer catalysts. The effects of catalysts structures, reaction time, reaction temperatures and solvents on the reactions were studied. The FTIR technique was employed to monitor the reaction process.4. The adsorption property and adsorption mechanism of the resin of PSME<WP=5>toward Hg(II), Ag(I) and Au(III) were studied. The comprehensive study by XPS, SEM, WAXD, XRD and the aperture analysis shows that there existed different degree redox during the process of the adsorption, where S atom in the resin was oxidized into -SO- and -SO2-, and Hg(II), Ag(I) and Au(III) were reduced to Hg(I), Hg(0), Ag(0) and Au(0), respectively.更多还原