黏土对超临界CO2在聚乳酸中溶解性能的影响  

Effect of Clay on Solubility of Supercritical Carbon Dioxide in Polylactic Acid

作　　者：谢格峰[1] 蒋果[1] 黄汉雄[1] 陈兆科[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,塑料橡胶装备及智能化研究中心,广东广州510640

出　　处：《塑料》2010年第2期58-60,共3页Plastics

基　　金：国家自然科学基金青年基金项目(50803020)

摘　　要：采用体积法测量超临界CO2在聚乳酸(PLA)及PLA/黏土纳米复合材料中的溶解性能,研究黏土对超临界CO2在PLA中溶解速率和溶解度的影响。结果表明:黏土的存在使超临界CO2在PLA中的溶解速率大大降低,溶解度从纯PLA的12.7%降低到复合材料的5.1%(测试温度170℃、压力10 MPa),降幅达60%。从材料的流变性能和结晶性能两方面分析其内在原因。The solubility of supercritical carbon dioxide in Polylactic acid （PLA） and PLA/clay nanocomposite was measured according to volumetric method. Effect of clay on the solubility was investigated. Results showed that the addition of clay greatly decreased the dissolution rate of supercritical carbon dioxide in PLA. The solubility was from 12. 7 % of pure PLA to 5.1% of nanocomposite at 170 ℃ and 10 MPa,decreased by 60 %. It＇ s reason was analyzed from the view point of dynamical rheological property and crystallization.

关 键 词：体积法 超临界CO2 溶解度 聚乳酸 聚乳酸/黏土纳米复合材料 

分 类 号：Q946.816[生物学—植物学]