纳米氮化钛对聚乳酸结构与性能的影响  

Effects of Nano-Ti N on the Structure and Properties of Polylactic Acid

作　　者：宋剑斌[1,2] 袁全平[1] 张庆新[3] 张绘[4] 傅峰[1] 刘学莘[2] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]福建农林大学材料工程学院,福建福州350002 [3]河北工业大学化工学院,天津300401 [4]中国科学院过程工程研究所,北京100190

出　　处：《塑料工业》2015年第5期63-66,共4页China Plastics Industry

基　　金：中国博士后基金(2014M560138);教育部回国留学人员基金;福建省自然科学基金(No.2014J01068);福建省教育厅基金(JK2013012)

摘　　要：通过熔融共混法制备了聚乳酸(PLA)/纳米氮化钛(Ti N)复合材料,采用X射线衍射仪(XRD)、差示扫描量热仪(DSC)、旋转流变仪、动态热机械分析仪(DMA)和万能材料试验机等对PLA复合材料结构、热性能、流变性能、力学性能等进行表征。结果表明,纳米氮化钛对PLA晶体结构影响不大,但是诱发生成了新的晶体;PLA的玻璃化转变温度(Tg)受氮化钛影响不大。同时纳米Ti N降低了PLA的冷结晶峰温度,并且提高了PLA熔点;流变结果证实氮化钛还可降低复合材料体系黏度,改善PLA加工性能;同时PLA复合材料的拉伸强度和弯曲强度有一定的改善。The polylactic acid （PLA）/nano-titanium nitride （nano-TiN） composites were prepared by melt blending method. And the structure, thermal and rheological and mechanical properties of the resultant composites were characterized by X-ray diffractometer （XRD）, differential scanning calorimeter （DSC）, rotational rheometer and dynamic mechanical thermal analyser （DMA）. The results showed that nano-TiN did not influence the crystal structure of PLA, but it induced a new crystal. The glass transition temperature （Tg） of PLA did not change regardless of TiN. At the same time, nano-TiN reduced the cold crystallization temperature of PLA and elevated the melting temperature of PLA; the rheological tests proved that nano-TiN could considerably decrease the viscosity of composites, improving the processing properties of PLA. Also, the tensile and flexural strength of the PLA composites were improved due to nano-TiN.

关 键 词：聚乳酸 氮化钛 X射线衍射仪 差示扫描量热仪 动态力学性能分析仪 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]