Effect of hyperbranched polyethyleneimine grafting functionalization of carbon nanotubes on mechanical, thermal stability and electrical properties of carbon nanotubes/bismaleimide composites

被引：10
|
作者：
Qiu, Jun [1 ]
Wu, Qianqian [1 ]
Jin, Lei [1 ]
机构：
[1] Tongji Univ, Sch Mat Sci & Engn, Educ Minist, Key Lab Adv Civil Engn Mat, Shanghai 201804, Peoples R China
来源：
RSC ADVANCES | 2016年 / 6卷 / 98期
关键词：
NONCOVALENT FUNCTIONALIZATION; NANOCOMPOSITES; POLYCARBONATE;
D O I：
10.1039/c6ra21545a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Hyperbranched polyethyleneimine (PEI) grafted CNTs (CNTs-PEI) were used to reinforce bismaleimide (BMI) composites. The effect of CNTs-PEI on mechanical properties, thermal resistance and electrical conductivity of composites was investigated. Evaluation of mechanical properties showed that the mechanical properties of CNTs-PEI/BMI composites were higher than that of CNTs/BMI composites. A maximum increase of impact strength up to 44% compared with that of pure BMI was observed in CNTs-PEI/BMI composites. The flexural strength of CNTs-PEI/BMI composites reached the maximum of 205 MPa which was much higher than that of CNTs/BMI composites. Similar tendency on the flexural modulus of the composites was observed. The maximum T-g of CNTs/BMI composites and CNTs-PEI/BMI composites were 224 degrees C and 240 degrees C respectively. Electrical conductivity of CNTs-PEI/BMI composites increased by 14 magnitude compared with pure BMI, while only 8 magnitude increased in CNTs/BMI composites.
引用
收藏
页码：96245 / 96249
页数：5
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