Abstract: Biodegradable aqueous polyurethane was made from self-made polyester diol. With varied proportions of lactic acid/adipic acid in the structure of polyester diol, the effects on the size of particle, hydrophilicity, biodegradability of polyurethane emulsion were studied. As the proportion of lactic acid increased, the particle size of the emulsion had a minimum. When the content of lactic acid was 25%, the hydrophilicity of the film made by polyurethane emulsion was the best; and as the content of lactic acid increased, the biodegradability of the aqueous polyurethane tended to increase.

摘要： 以自合成的脂肪族聚酯二元醇为原料，合成了可生物降解水性聚氨酯乳液。研究了二元醇结构中不同的乳酸/己二酸比例对聚氨酯乳液的粒径、亲水性及生物降解性的影响。结果表明：随着乳酸含量的增加，乳液的平均粒径出现一极小值；当乳酸含量为25％时，由聚氨酯乳液得到的胶膜的亲水性最好；随着乳酸含量的增加，水性聚氨酯的可生物降解性能呈增大趋势。