Critical Exponents of Gelation and Conductivity in Polyacrylamide Gels Doped by Multiwalled Carbon Nanotubes

被引：22

作者：

Aktas, Demet Kaya ^{[2
]}

Evingur, Gulsen Akin ^{[2
]}

Pekcan, Onder ^{[1
]}

机构：

[1] Kadir Has Univ, TR-34320 Cibali Istanbul, Turkey

[2] Istanbul Tech Univ, TR-34469 Maslak, Turkey

来源：

COMPOSITE INTERFACES | 2010年 / 17卷 / 04期

关键词：

Acrylamide; multiwalled carbon nanotubes; hydrogel; percolation; critical phenomena; fluorescence; MOLECULAR-SIZE DISTRIBUTION; ELECTRICAL-CONDUCTIVITY; POLYMER NANOCOMPOSITES; PERCOLATION-THRESHOLD; CRITICAL-BEHAVIOR; COMPOSITES; NETWORKS; POLYCARBONATE; POLYSTYRENE; RESISTIVITY;

D O I：

10.1163/092764410X495243

中图分类号：

TB33 [复合材料];

学科分类号：

080505 [复合材料];

摘要：

Polyacrylamide (PAM) doped by multiwalled carbon nanotube (MWNT) gels were prepared with different amounts of MWNTs varying in the range between 0.1 and 15 wt%. The PAM-MWNT composite gels were characterized by the steady state fluorescence technique (SSF). The alternative electrical conductivity (AC) of PAM-MWNT composite gels was measured by the dielectric spectroscopy technique. Observations around the gel point, t(gel) for PAM-MWNTs composite gels showed that the gel fraction exponent beta obeyed the percolation result. The critical exponent r of AC electrical conductivity for the composite PAM-MWNT gel was also measured and found to be about 2.0, which agrees with a random resistor network. (C) Koninklijke Brill NV, Leiden, 2010

引用

页码：301 / 318

页数：18

共 56 条

[1]

LOW-CONCENTRATION SERIES IN GENERAL DIMENSION [J].