反相微乳液酶催化合成木质素-对甲酚共聚物

Copolymerization of Lignin with P-cresol in Reverse Microemulsion

采用一种全新的反相微乳液体系 :十六烷基三甲基溴化铵 正丁醇 异辛烷 水 ,用辣根过氧化物酶催化合成木质素对甲酚共聚物 ,证实了反应的可行性。红外光谱的结果表明木质素与对甲酚发生了聚合反应 ,差示扫描量热分析的结果表明引入对甲酚改善了木质素的热性能。讨论了该聚合过程中酶浓度 ,活性剂浓度 ,W0 :c(H2 O) c(CTAB) ,酚浓度 ,木质素浓度 ,醇烃比对分子量的影响 .回归实验数据得出控制分子量大小的关联式 ,平均偏差为 8.7%。

Peroxidase catalyzed copolymerization of P-cresol with lignin in a new reverse microemulsion system:CTAB/n-butanol/isooctane/water,was successfully carried out.As indicated by infrared spectrum,lignin and P-cresol reacted each other to form copolymer.DSC shows that the thermal property of the copolymer is better than that of lignin.The factors which influence molecular weight of the copolymer,including enzyme concentration,surfactant concentration,ratio of n-butanol to isooctane,substrate concentration,were investigated.The correlation is regressed by a non-linear method.The mean deviation of the prediction is 8.7%.