木质素基β-环糊精醚的合成及对Cu^(2+)的吸附性能  

Synthesis of Lignin Grafted β-Cyclodextrin and Its Cu^(2+) Adsorption Performance

作　　者：胡春平[1] 方桂珍[1] 李志娜[1] 金钟玲[1] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040

出　　处：《中国造纸学报》2008年第4期66-69,共4页Transactions of China Pulp and Paper

基　　金：东北林业大学校立基金资助项目(07019)部分内容

摘　　要：采用固载化的方法,以环氧氯丙烷做为连接剂,在碱性介质中将β-环糊精接枝到木质素上,制备了木质素基β-环糊精醚(简称L-β-CD)新型吸附剂。采用红外光谱对其结构进行定性分析,通过单因素实验,考察了β-环糊精用量、氢氧化钠用量、反应温度和反应时间对β-环糊精含量的影响,研究了L-β-CD对Cu2+的吸附性能。结果表明,L-β-CD的较佳合成条件为:β-环糊精与木质素的质量比为3∶1,氢氧化钠(质量分数16.7%)用量25 mL/g木质素,反应温度55℃,反应时间3 h,此时木质素基β-环糊精醚中β-环糊精的含量最大,为30.88μmol/g。20℃时,L-β-CD对Cu2+吸附容量为16.54 mg/g。A new kind of adsorption agent lignin grafted β-cyclodextrin （L-β-CD） coataining epichlorohydrin was synthesized in the alkaline solution from the wheat straw alkali lignin. The structure of lignin grafted β-cyclodextrin was analyzed by FT-IR. The influences of the dosage of β-cyclodextrin, reaction temperature, reaction time and the dosage of sodium hydroxide on the β-cyclodextrin content were investigated. The results showed that the optimal synthesis condition was that the ratio of β-cyclodextrin to lignin was 3 to 1 by weight, the reaction temperation was 55℃, the reaction time was 3 hours and the dosage of sodium hydroxide was 25 mL（16.7% by weight） per gram of lignin, the β-cyclodextrin content reached the maximum 30.88 μmol/g under this condition. The Cu^2＋ adsorption performance of the lignin grafted β-cyclodextrin was studied in the model of polluted water. The results showed that the saturated quantity of Cu^2＋ reached 16.54mg/g.

关 键 词：麦草碱木质素 Β-环糊精 木质素基β-环糊精醚 吸附 CU^2+ 

分 类 号：TQ630.43[化学工程—精细化工]