摘要
借助等离子体引发丙烯酸-3-(全氟-3-甲基丁基)-2-羟丙酯在碳纳米管表面的诱导接枝聚合,得到新型氟化碳纳米管(f-CNTs),进而制备出f-CNT/热塑性聚氨酯(f-CNT/TPU)复合弹性体。结果表明,氟化虽不改变CNTs的表面结构,但却在其组成中引入了含量10.40%的氟元素。经含氟高聚物接枝碳纳米管的平均直径约为30 nm,均匀分散于TPU基体中。随着f-CNTs含量的增加,所得f-CNT/TPU复合弹性体的拉伸强度和断裂伸长率均呈现先增后减趋势。当f-CNTs加入量为0.3%时,该复合弹性体的拉伸强度和断裂伸长率分别高达36.5 M Pa和630%,较纯TPU弹性体分别提高40.4%和26.5%,并初步探讨了可能的增强增韧机理。而随着f-CNTs含量的增加,f-CNT/TPU复合弹性体的表面自由能由27.3 m N/m降低至9.9 m N/m,表现出优异的表面性能。
Carbon nanotubes（ CNTs） were grafted with acrylic acid-3-（ perfluoro-3-methykbutyl）-2-hydroxypropylate by an oxygen plasma-assisted method to increase their dispersion in thermoplastic polyurethane（ TPU）. The TPU monomers and the grafted CNTs were mixed and polymerized to prepare the CNT / TPU composites. Results showthat the grafting procedure has little effect on the structure of the CNTs. The grafted CNTs have a fluorine content of 10. 40% and a diameter of about 30 nm,and are uniformly dispersed in the TPU matrix. The tensile strength and elongation at fracture of the composites have maxima of 36. 5 MPa and 630%,respectively,at a CNT content of 0. 3%,and these are respectively 40. 4% and 26. 5% higher than those of pure TPU. Moreover,the surface free energy of the composites decreases from 27. 3 to 9. 9 m N / m with increasing CNT content from 0 to 0. 8%.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2015年第4期378-384,共7页
New Carbon Materials
基金
国家自然科学青年基金(21106083)
上海市重点学科项目(J51504)
校复合材料重点学科建设项目(10210Q140001)
上海教师专业发展工程项目(201456)
上海市联盟计划(LM201449
LM201450)~~
关键词
碳纳米管
聚氨酯
弹性体
复合材料
高强韧
Carbon nanotubes
Polyurethane
Elastomer
Composite
High-toughness
作者简介
贾润萍，博士，教授．E—mail：jiarp@sit．edu．cn
