溶液插层法制备聚乳酸/氧化锌柱撑皂石纳米复合材料及性能表征  

Properties of Polylactic Acid/Zinc Oxide Pillared Saponite Nanocomposites Prepared by Solution Intercalation

作　　者：李进[1] 甄卫军[1] 申丹[1] 韩卫[1] 

机构地区：[1]石油天然气精细化工教育部(自治区)重点实验室,新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《高分子材料科学与工程》2013年第10期160-163,168,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51163013)

摘　　要：通过微波水解法制备了氧化锌(ZnO)柱撑皂石,并以其为助剂,利用溶液插层法制备了聚乳酸(PLA)/ZnO柱撑皂石纳米复合材料。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对ZnO柱撑皂石及PLA/ZnO柱撑皂石纳米复合材料的结构进行了表征,并对其力学性能和热稳定性能进行了测试。微观结构分析表明,ZnO柱撑皂石呈剥离状,并均匀分散在PLA基质中。力学性能研究表明,加入PLA基质质量0.3%的ZnO柱撑皂石有助于改善PLA复合材料的拉伸强度。DSC结果显示,加入ZnO柱撑皂石后,PLA的结晶度从21.2%增加到40.9%,说明纳米ZnO柱撑皂石可以消除PLA复合材料冷结晶,有助于提高PLA复合材料的结晶度,与XRD分析相吻合;热重分析显示,加入ZnO柱撑皂石后,PLA复合材料的热分解温度从353.3℃升高到360.35℃,表明ZnO柱撑皂石可以提高PLA复合材料的热稳定性。Polylactic acid （PLA） / zinc oxide （ZnO） pillared saponite nanocomposites that were synthesized via microwave hydrolysis method were prepared by solution intercalation. The structure of ZnO pillared saponite and PLA /ZnO pillared saponite nanocomposites were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM） and transmission electron microscope （TEM）. Moreover, the mechanical properties and thermostability of PLA/ZnO pillared saponite nanocomposites were studied. The morphology analysis shows that the ZnO pillared saponite is uniformly dispersed in the PLA matrix in the form of exfoliated or partially intercalated nanometer layers. The results of mechanical measurements show that maximum tensile stress of PLA nanoncomposites is improved when the loading content of ZnO pillared saponite is 0.3 % of PLA. DSC results display that tile crystallinity of PLA/ZnO pillared saponite increases from 21.2 % to 40.9 %, which indicates that the ZnO pillared saponite can eliminate the cold crystallization process and obviously promote the crystallinity. TG-I）TA analysis shows that the thermal decomposition temperature rises from 353.3 ℃ to 360.35 ℃, and the thermostability of PLA/ZnO pillared saponite nanocomposites is improved.

关 键 词：溶液插层 聚乳酸 ZnO柱撑皂石 性能 

分 类 号：TB383[一般工业技术—材料科学与工程]