木材防腐剂壳聚糖金属配位聚合物合成条件的优化

Optimum conditions for synthesis of chitosan Metal complex(CMC) as new potential wood preservative

采用铜盐（CuCl2）和锌盐（ZnCl2）与壳聚糖反应，生成壳聚糖金属配合物。通过正交试验研究了壳聚糖的脱乙酰度、壳聚糖与金属盐的质量分数比、络合时间、反应温度4个因素对合成两种配合物金属离子质量分数的影响。极差分析表明，各因素对试验结果影响的大小顺序为：壳聚糖的脱乙酰度〉壳聚糖与金属盐的质量分数比〉络合时间〉反应温度；得出壳聚糖金属铜配合物的合成条件为：壳聚糖的脱乙酰度85％～90％，络合时间2h、氯化铜与壳聚糖的质量分数比为1．2：1，反应温度为45℃；壳聚糖金属锌配合物的合成条件为：壳聚糖的脱乙酰度85％～90％，络合时间5h、氯化锌与壳聚糖的质量分数比为1．4：1，反应温度为55℃。壳聚糖铜、锌配合物合成条件的优化为木材防腐剂的制备提供了新的思路。

In this experiment, chitosan metal complex was synthesized by using chitosan and CuCl2/ ZnCl2. The effects on the synthesis of chitosan metal complex were in the order of deacetylated〉ratio of copper/chitosan（m/m）〉time〉temperature. The optimum conditions of synthesis by using chitosan copper complex（CCC） orthogonal experiment were. 85 % - 90 % level of N-acetylation, 1.2 ： 1 （m/m） ratio of copper / chitosan,2 hour,45℃ ;the optimum conditions of synthesis chitosan zinc complex（CZC） were.85% -90% level of N-acetylation, 1.4～1 （m/m） ratio of zinc / chitosan, 5-hour, 55 ℃. Results above showed that the establishment of the optimum conditions for synthesis of chitosan metal complex could provide a new way for producing environment-friendly wood preservatives.