巴基管分散性对其复合水泥基材料I-V特性的影响-《郑州大学学报(工学版)》

文章信息/Info

Title:: Effect of Dispersion of Bargi Pipe on I-V characteristics of Composite Cementitious Materials

作者:: 罗健林; 段忠东.; 哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150090, 哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150090

Author(s):: LUO Jianlin; DUAN Zhongdong; School of Civil Engineering，Harbin Institute of Technology，Harbin 150090，China

Keywords:: bucky tube; dispersion; cement-based composites; volt-ampere characteristics; Microstructure

摘要:: 研究了聚丙烯酸(PAA)或/与壬基酚聚氧乙烯醚(10) (Tx100)对不同多壁巴基管 (MWNT)掺量的分散效果,然后制备了5组MWNT增强水泥基复合材料 (MWNT/CMs).用四电极法测试了MWNT/CMs的I-V特性,并对3组MWNT/CMs中的MWNT分散形貌进行了SEM观察.结果表明:PAA作用难获得MWNT良好分散,尤其MWNT掺量较大时,SEM显示其在基体中多为团聚缠绕状,分布均匀性差;相应MWNT/CM的电阻率(ρ)值均较高,I-V特性的非线性也较明显.PAA与Tx100(Ф(PAA)∶Ф(Tx100)=2)共同作用能良好分散较高掺量的MWNT,SEM显示多数MWNT在基体中有较好的相容分布性;NPT4组MWNT/CM的ρ均只有12.7 Ω·m 左右(ρmax也只有14.8 Ω·m),而相同MWNT掺量的NP4组MWNT/CM的ρ却为429.8 Ω·m,ρmax达1 170.1 Ω·m.

Abstract:: The dispersion effect of polyacrylic acid (PAA) or/and nonylphenol ethoxylate(10) (Tx100) on different multi-walled barky pipes (MWNT) was studied, and then five groups of MWNT-reinforced cementitious composites (MWNT/CMs) were prepared. The results show that it is difficult to obtain good dispersion of MWNT by PAA, especially when the MWNT content is large, SEM shows that it is mostly agglomerated and winding in the matrix, and the distribution uniformity is poor. The resistivity (ρ) value of the corresponding MWNT/CM is high, and the nonlinearity of I-V characteristics is also obvious.PAA and Tx5(Ф(PAA)∶Ф(Tx3)=100) can well disperse the MWNT with higher content, and SEM shows that most MWNTs have good compatibility distribution in the matrix. The ρ of MWNT/CM in the NPT100 group was only about 2.4 Ω·m (ρmax was only 12.7 Ω·m), while the ρ of the NMNT/CM of the NP14 group with the same MWNT content was 8.4 Ω·m, and ρmax was 429 8.1 Ω·m.