引用本文:
石光, 袁彦超, 陈炳稔, 王瑞香. 交联壳聚糖的结构及其对不同金属离子的吸附性能[J]. 应用化学,
2005, 22(2): 195-199.
Citation: SHI Guang, YUAN Yan-Chao, CHEN Bing-Ren, WANG Rui-Xiang. Structure and Adsorption Property of Crosslinked Chitosan Towards Metal Ions[J]. Chinese Journal of Applied Chemistry, 2005, 22(2): 195-199.
Citation: SHI Guang, YUAN Yan-Chao, CHEN Bing-Ren, WANG Rui-Xiang. Structure and Adsorption Property of Crosslinked Chitosan Towards Metal Ions[J]. Chinese Journal of Applied Chemistry, 2005, 22(2): 195-199.
交联壳聚糖的结构及其对不同金属离子的吸附性能
摘要:
以甲醛、环氧氯丙烷为交联剂,由壳聚糖(CTS)合成了一种交联壳聚糖微球(AECTS)。研究了AECTS对Cu2+、Ni2+、Co2+的静态吸附性能,测定了吸附等温线,并通过FTIR、WAXD、DTG以及DSC等方法对吸附产物的结构进行了表征。结果表明,AECTS对Cu2+、Ni2+、Co2+的吸附量分别为2.42、1.37和0.39 mmol;IR分析表明,金属离子的吸附主要是与壳聚糖分子中的氨基、羟基配位所致,且配位强度正比于吸附量;WAXD分析显示,金属离子的吸附不仅发生在非晶区,也渗透到晶区,对晶区的破坏程度正比于吸附量。TG分析表明,交联、金属吸附使CTS 3个降解阶段的温度不同程度地向低温移动,移动幅度与金属吸附量存在一定的对应关系。
English
Structure and Adsorption Property of Crosslinked Chitosan Towards Metal Ions
Abstract:
The adsorption of Cu2+, Ni2+ and Co2+ onto chitosan crosslinked by formaldchyde and epichlorohydrin (AECTS) has been studied. The adsorption capacities of AECTS towards Cu2+, Ni2+ and Co2+ were found to be 2.42, 1.37 and 0.39 mmol/g, respectively. The FTIR analysis indicates that the adsorption was realized via the coordination of -NH2 and -OH groups in AECTS to the metal ions, and the binding strength was positively proportional to the adsorption capacity. WAXD results indicate metal ions adsorbed onto both the amorphous and crystal regions of AECTS, and the destructive degree of the crystal region was in direct proportion to the adsorption capacity. TG analysis shows that the crosslinking and metal ions adsorption could change the three decomposition temperatures of CTS to lower degree, depending on adsorption capacity change.
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Key words:
- cross-linked chitosan
- / Cu2+
- / Co2+
- / Ni2+
- / structure
- / adsorption property
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