Epoxy resin nanosuspensions and reinforced nanocomposites from polyaniline stabilized multi-walled carbon nanotubes

被引：153
作者：
Gu, Hongbo [1 ,2 ]
Tadakamalla, Sruthi [1 ,3 ]
Zhang, Xi [1 ,3 ]
Huang, Yudong [2 ]
Jiang, Yuan [1 ]
Colorado, Henry A. [4 ]
Luo, Zhiping [5 ,6 ]
Wei, Suying [3 ]
Guo, Zhanhu [1 ]
机构：
[1] Lamar Univ, Dan F Smith Dept Chem Engn, ICL, Beaumont, TX 77710 USA
[2] Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150001, Heilongjiang, Peoples R China
[3] Lamar Univ, Dept Chem & Biochem, Beaumont, TX 77710 USA
[4] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90066 USA
[5] Fayetteville State Univ, Dept Chem & Phys, Fayetteville, NC 28301 USA
[6] Fayetteville State Univ, SE N Carolina Reg Microanalyt & Imaging Consortiu, Fayetteville, NC 28301 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2013年 / 1卷 / 04期
基金：
美国国家科学基金会;
关键词：
MECHANICAL-PROPERTIES; THERMAL-DEGRADATION; NANOPARTICLES FABRICATION; RHEOLOGICAL BEHAVIOR; DIELECTRIC-CONSTANT; GLASS-TRANSITION; QUANTUM DOTS; FUNCTIONALIZATION; PERCOLATION; SILICA;
D O I：
10.1039/c2tc00379a
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The high performance multi-walled carbon nanotubes (MWNTs) reinforced epoxy polymer nanocomposites (PNCs) have been synthesized at different MWNT loading levels. The surface functionalization of MWNTs with conductive PANI was achieved by using a facile surface initiated polymerization method with the aid of the oxidations of CNTs and subsequent anilines by hexavalent chromium (Cr(VI)) oxidant. The effects of MWNT loading, surface functionalization and temperature on the rheological behaviors of liquid epoxy resin nanosuspensions and on the physicochemical properties of cured solid PNCs were systematically investigated. The glass transition temperature (T-g) of the cured epoxy PNCs filled with functionalized MWNTs obtained from the dynamic mechanical analysis (DMA) test was increased about 6-25 degrees C than that of cured pure epoxy. The PNCs reinforced with functionalized MWNTs demonstrated an enhanced tensile strength than either cured pure epoxy or its PNCs filled with the as-received MWNTs. The electrical conductivity of cured epoxy PNCs with functionalized MWNTs was improved by 5.5 orders of magnitude compared with cured pure epoxy. Thermogravimetric analysis (TGA) revealed an enhanced thermo-stability in the cured epoxy PNCs filled with functionalized MWNTs than that of cured pure epoxy and its PNCs filled with the as-received MWNTs. The observed strong interfacial interaction between MWNTs and the epoxy resin matrix was responsible for the enhanced mechanical tensile strength. The nanocomposite formation mechanism is proposed based on the analysis from Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), Raman and differential scanning calorimetry (DSC) tests.
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收藏
页码：729 / 743
页数：15
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