Excellent dispersion of MWCNTs in PEO polymer achieved through a simple and potentially cost-effective evaporation casting

被引:18
作者
Park, Myounggu [1 ,2 ,3 ]
Kim, Hyonny
Youngblood, Jeffrey P. [4 ,5 ]
Han, Sang Woo [1 ]
Verplogen, Eric [6 ]
Hart, A. John [1 ]
机构
[1] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA
[2] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47906 USA
[3] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47906 USA
[4] Univ Calif San Diego, Dept Struct Engn, San Diego, CA 92093 USA
[5] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47906 USA
[6] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
基金
美国国家卫生研究院; 美国国家科学基金会;
关键词
CARBON NANOTUBE COMPOSITES; X-RAY-SCATTERING; SMALL-ANGLE; POLY(ETHYLENE OXIDE); PERCOLATION-THRESHOLD; MECHANICAL-PROPERTIES; TRANSPORT; CRYSTALLIZATION; CONDUCTIVITY; FABRICATION;
D O I
10.1088/0957-4484/22/41/415703
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A simple, reliable and potentially cost-effective composite film casting procedure is presented using the evaporation of solvent (water) from a dilute mixture of multiwalled carbon nanotubes (MWCNTs) and polyethylene oxide (PEO) polymer. It is found that the fabrication method develops excellent dispersion of MWCNTs in PEO confirmed by morphology observations, final crystallinity of polymer (amorphous) and a lower percolation threshold (closer to theoretical value) as well as higher electrical conductivity. A film thickness prediction model is derived based upon the fact that final film thickness is mainly dependent upon the dimensions of the casting mold and the loading of the MWCNTs and polymer. This simple model provides important insight that the material loss and the actual density of the base polymer are critical factors making the current casting method truly cost effective and controlling final thickness.
引用
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页数:12
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