酸催化壳聚糖缩合水杨醛螯合树脂的制备

THE PREPARATION OF CHELATING RESIN OF CHITOSAN CONDENSE WITH SALICYLALDEHYDE BY ACID CATALYST

在酸催化下， 通过单因素试验和Ｌ９ （３４） 正交试验， 研究表明壳聚糖与水杨醛缩合反应最佳反应条件为： ８０ ℃溶胀２ ｈ ， 反应５ ｈ， ｐＨ＝ ４０ ～４５ ， 反应物配比１∶４ ， 产率达到９０ ％ 以上。并用分光光度法对缩合反应的缩合率进行定量跟踪。

The condensation conditions of chitosan(CTS)with salicylaldehyde( SHD) have been systematically studied for the first time.On the basis of mono-element researches and by L 9(3 4) orthogonal experiments, the best condensation conditions of CTS with SHD are:using ethanol as solvent,swelling two hours at 80 ℃, reacting 5 hours,pH=4 0～4 5, the mol ratio of CTS/SHD is 1/4,the yield of S-CTS(H) reaches over 90%. Two quantitative measures have been studied through creatively analysing S-CTS(H) by the way of photo-metric analysis for the first time.