以马铃薯残渣为原料的端羟基乳酸预聚物的制备

Synthesis of Hydroxyl Terminated Prepolymer of Polylactic Acid Using Potato Waste as Raw Materials

[目的]利用马铃薯残渣为原料合成乳酸预聚物,为聚乳酸的生产工艺改造提供理论依据。[方法]将由马铃薯残渣发酵所得的乳酸采用熔融缩聚法合成乳酸预聚物,并对此方法进行了优化。[结果]最佳工艺:催化剂辛酸亚锡的用量1%,熔融缩聚时间10 h,反应温度170℃,1,4-丁二醇用量1%。[结论]熔融缩聚法聚合所得的聚乳酸预聚物的最高分子量为3059 g/mol,用马铃薯残渣为原料合成乳酸预聚物简单易行,该方法提供了一种新的废物利用途径。

[Objective]The synthesis of hydroxyl terminated prepolymer of polylactic acid using potato waste was studied to provide theoretical basis for reformation of productive technology of polylactic acid.[Methods]This study applied direct condensation method for polymerization of lactic acid produced from potato waste and the methods were optimized.[Result]The results showed the following optimum conditions for polymerization：catalyst dosage：1%,reaction time：10 h,reaction temperature：170 ℃,1,4-Butanediol dosage：1%.[Conclusion]The highest molecular weight of polylactic acid prepolymer obtained by melt condensation polymerization reached 3 059 g/mol.This study provides an alternative substitute for polylactic acid synthesis,which helps transfer low value potato waste to high value product.