邻苯二酚在水相胶束中的酶促聚合

Enzymatic synthesis of poly(catechol) in aqueous micelle system

摘要:

在十二烷基苯磺酸钠(SDBS)的水相胶束体系中，利用漆酶催化聚合邻苯二酚。探讨了反应体系的温度、pH值、底物摩尔比以及邻苯二酚浓度对聚合反应的影响。通过FT-IR、GPC、DSC和TGA对产物进行表征。结果表明：漆酶催化邻苯二酚聚合的最适条件为温度40℃，pH值为5.5、SDBS浓度为2.5 mmol/L、邻苯二酚与SDBS摩尔比为2:1。聚合产物分子量约为810 Da，热分析表明聚合物玻璃化转变温度为95℃。

Abstract:

Enzymatic polymerization of catechol was conducted using laccase enzyme in Sodium Dodecylbenzenesulfonate Micellar Solutions. The influence of temperature, pH value, the molar ratio of catechol to SDBS and catechol concentration on polymerization were studied. FT-IR, GPC, DSC and TGA were employed to characterize the synthesized poly(catechol). The results showed that the optimum reaction conditions were as follows: the temperatures was 40℃, pH value of the reaction was 5.5, the concentration of SDBS was 2.5 mmol/L and the molar ratio of catechol to SDBS was 2:1. The number average molecular weight of poly(catechol) was found as 810Da. Thermal analysis showed that the polymer glass transition temperature was 95 ℃.