从餐厨垃圾所得乳酸丁酯经熔融固相聚合成聚乳酸的研究  

Melt-solid Polycondensation of Butyl Lactate from Kitchen Waste to Obtain Polylactic Acid

作　　者：赵文军[1,2] 孙晓红[3] 汪群慧[1] 滕云[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [2]黑龙江大学建筑工程学院,黑龙江哈尔滨150086 [3]北京农林科学院北京农业生物技术研究中心,北京100097

出　　处：《应用基础与工程科学学报》2009年第3期335-342,共8页Journal of Basic Science and Engineering

基　　金：国家863高技术研究发展计划资助项目(2008AA06Z34);国家“十一五”科技支撑计划项目(2006BAJ04A06)

摘　　要：以餐厨垃圾发酵液中提取的乳酸丁酯单体为原料,以复配的SnC l2和TSA为催化剂,合成高分子量的聚乳酸.首先乳酸丁酯在160℃下熔融聚合10h合成低聚物,接着在140℃下固相缩聚40h进一步提高分子量.从餐厨垃圾合成的聚乳酸粘均相对分子量可达22000,经红外光谱和XRD测定,该聚合物为聚外消旋乳酸(PDLLA).本工艺省去乳酸丁酯水解生成乳酸的工序,为简化聚乳酸合成路线、避免反应设备的腐蚀、降低餐厨垃圾制取聚乳酸的生产成本提供了新途径.Butyl lactate, extracted and purified from the fermentation broth of kitchen waste, was studied to successfully obtain high-molecular-weight polylactic acid （PLA）, catalyzed by a SnCl2/TSA binary system. At first, a solid condensate was prepared by melt polycondensation of butyl lactate at 160℃ for 10h, and then it was subjected to solid-state polycondensation at 140℃ for 40h to increase the molecular weight, which produce PLA with an Mn of 22,000. The results from IR and XRD spectrums showed that the product was poly （D, L-lactic acid） （PDLLA）. This process by omitting butyl lactate hydrolysis can afford a new route to simplify synthesis of PLA, avoid the corrosion of equipment, and decrease PLA production cost from kitchen waste.

关 键 词：餐厨垃圾 聚乳酸 乳酸丁酯 熔融固相聚合 

分 类 号：R705[医药卫生—临床医学]