羟甲基化木质素壳聚糖复合膜的制备及性能分析  

Preparation and Property Analysis of Hydroxymethylated Lignin-Chitosan Composite Membrane

作　　者：李珊珊[1] 方桂珍[1] 孙末宾[1] 金钟铃[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2期36-40,共5页Transactions of China Pulp and Paper

基　　金：黑龙江省重点基金项目(GB05B601-02)

摘　　要：以羟甲基化木质素和壳聚糖为原料制备了木质素壳聚糖复合膜,与壳聚糖膜对比,考察了木质素和壳聚糖的共混比对膜物理性能的影响,研究了膜的抗酸性能及动态过滤螫合Cu(Ⅱ)的性能。结果表明,当共混比(质量比)为1:2时,木质素壳聚糖复合膜外观平整、光滑,厚度均匀,木质素的混入使壳聚糖膜的酸性适用范围下限由pH值4降至pH值3.5;处理500 mL Cu(Ⅱ)溶液,木质素壳聚糖复合膜单位面积膜累积Cu(Ⅱ)螯合量是0.4741 g/m^2,比壳聚糖膜提高52.39%。The lignin-chitosan composite membrane was prepared with hydroxymethylated lignin and chitosan as raw meterials. The effects of mixture ratio of the raw material on the physical properties and the dynamic filtrating-chelating capacity of the lignin-chitosan composite membrane were studied. The results indicated that the thickness of lignin-chitosan composite membrane was uniform and it could be used in the pH condition not lower than from pH value 4 to 3.5. The optimal mixture ratio of hydroxymethylated lignin to chitosan was 1：2 by weight. After treating 500mL Cu （ Ⅱ ） liquor, the dynamic filtrating-chelating capacity per unit area of the lignin-chitosan composite membrane was 0.4741 g Cu（ Ⅱ ）/m^2, increased by 52.39% comparing with the chitosan membrane.

关 键 词：羟甲基化木质素 壳聚糖 复合膜 动态过滤螫合性能 

分 类 号：X793[环境科学与工程—环境工程]