母料-熔融共混法制备TPU/TRG纳米复合材料  

TPU / TRG Nanocomposites Prepared by Masterbatch-Melting Compounding Process

作　　者：何飞雄[1] 卞军[1] 蔺海兰[1] 王刚[1] 周强[1] 杨峰[1] 鲁云[2] 

机构地区：[1]西华大学材料科学与工程学院特种材料及制备技术重点实验室,四川成都610039 [2]千叶大学

出　　处：《西华大学学报（自然科学版）》2014年第6期57-61,72,共6页Journal of Xihua University:Natural Science Edition

基　　金：教育部春晖合作计划基金项目(Z2010097);四川省教育厅青年基金项目(11ZB005);西华大学特种材料与制备技术重点实验室开放研究基金项目(SZjj2012-020);汽车高性能材料及成形技术四川省高校重点实验室开放研究基金(SZjj2014-054);西华大学"青年学者培养计划"基金(01201404)

摘　　要：为改善热塑性聚氨酯(TPU)的力学和热性能,采用热剥离-还原石墨烯纳米片(TRG)为改性剂,经母料-熔融共混法制备TPU/TRG纳米复合材料,采用扫描电子显微镜(SEM)、X线光电子能谱、拉伸性能测试、X线衍射(XRD)和示差扫描量热法(DSC)等表征天然石墨粉、氧化石墨和TRG的形貌以及复合材料的力学、热学和微观结构。结果表明,TRG的加入能显著提高TPU基体的力学性能,当加入少量(质量分数1%)的TRG时,TPU/TRG纳米复合材料的弹性模量与纯TPU相比提高了64%,TRG的加入还提高了TPU的定伸(100%)应力。DSC测试表明,TRG的加入提高了复合材料的热性能,当加入质量分数1%的TRG时,其熔融温度和结晶温度分别提高了约14℃和11℃。XRD和SEM分析表明,TRG已经均匀地分散到TPU基体中。In order to improve the mechanical and thermal properties of thermoplastic polyurethane （TPU）, the thermal exfoliated- reduction graphene nanosheet （TRG） was selected as modifier and the TPU/TRG nanocomposites were prepared via masterbatch-melting compounding process. The morphology of Natural Graphite Powder （NGP） , Graphite Oxide （ GO ） , TRG and the mechanical, thermal properties, and micro-structure of the TPU/TRG nanocomposites were investigated by using scanning electron microscope （SEM）, X-ray photoelectron spectrum （XPS）, tensile tests, X-ray diffraction （XRD） and differential scanning calorimetry （DSC） tests, respectively. The results showed that the mechanical property was improved by adding TRG. When a small amount （ 1 wt. % ） of TRG was added, the Young＇ s modulus of TPU was improved by 64% , compared with that of pure TPU. Moreover, the strain stress under 100% of TPU was also raised when TRG was added. DSC tests showed that TRG improved the thermal property of TPU. When 1 wt. % TRG was added, the melting temperature （Tm） and crystalline temperature （Tc ） were increased about 13℃ and 11℃, respectively, compared with those of pure TPU ; XRD and SEM characterizations showed that TRG was dispersed uniformly in the TPU matrix.

关 键 词：热塑性聚氨酯(TPU) 热剥离-还原石墨烯纳米片(TRG) 母料法 纳米复合材料 热性能 

分 类 号：TB324[一般工业技术—材料科学与工程]