采用熔融共混炼法制备交联改性聚乳酸(PLA)/埃洛石(HNTs)纳米复合材料,利用热重分析、差示扫描量热分析、偏光显微镜和流变仪对其热学性能、结晶、流变行为进行了研究,并采用超临界CO2流体技术进行微孔发泡,利用扫描电镜对泡孔形态进行了表征.结果表明:随着HNTs含量的增加,PLA/HNTs复合体系在高温下的热稳定性下降,结晶度由37.4％下降为28.0％,但异相成核效果明显,结晶速率提高,结晶时间由2h缩短为10min.同时,加入HNTs后,PLA/HNTs的熔体粘度显著增加,但随着HNTs含量的增多,PLA/HNTs纳米复合材料粘度增加的趋势逐渐趋缓.当HNTs含量为0.5wt％时,体系粘度达到最大值且发泡效果最佳,泡孔平均直径为21.23μm,泡孔密度达到1.08×109个/cm3.
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