Size Effect of Particulate Filler on Electrical Resistivity of Carbon Nanotube Polymer Composites: Transition of Excluded Volume Effects

2014 ◽  
Vol 2014 (1) ◽  
pp. 000268-000271
Author(s):  
Sung-Hoon Park ◽  
Jinyoung Hwang ◽  
Dong-Jin Yun ◽  
Sangeui Lee ◽  
Sang Hyun Lee ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Resistivity ◽  
Carbon Nanotube ◽  
Size Effect ◽  
Polymer Composites ◽  
Excluded Volume ◽  
Excluded Volume Effects ◽  
Conductivity Increase ◽  
Particulate Filler ◽  
Volume Effects

Hybrid Carbon nanotube (CNT) composites consisting more than two different kind fillers have received considerable attention which could improve electrical conductivity and mechanical properties. Incorporation of micro-scale second filler, excluded volume is created that effectively creates a segregated network of nanotube. Even if there were successful trials with theoretical model in second filler composite system, it was not fully understood how the electrical conductivity increase with respect to shape (or size) of second filler. Aim of the present research is an understanding of size effect of particulate filler on electrical resistivity of carbon nanotube polymer composites. Depending on size of particulate filler, conductivity of carbon nanotube polymer composites are changed (increase or decrease) indicating there is transition of excluded volume effects. For example, enhanced conductivity was observed in cooperation with micro-size second filler while decreased conductivity was observed for nano-size filler.

scholarly journals Improved Electromagnetic Interference Shielding Properties Through the Use of Segregate Carbon Nanotube Networks

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1395 ◽  
Author(s):  
Sung-Hoon Park ◽  
Ji-Hwan Ha
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Electromagnetic Interference ◽  
Silica Particles ◽  
Excluded Volume ◽  
Emi Shielding ◽  
Excluded Volume Effects ◽  
Content Ratio ◽  
Shielding Properties ◽  
Micro Silica

We report the enhanced electromagnetic interference (EMI) shielding properties of hybrid carbon nanotube (CNT) composites consisting of more than two kinds of fillers through the use of segregate conducting networks. An excluded volume was created by micro-sized silica particles that concentrate the CNT network, resulting in improved electrical conductivity and microwave properties. To achieve the optimal dispersion of CNTs and silica particles, high shear force was applied to the pre-cured composite mixture via three-roll milling. Depending on the micro-silica content ratio, we observed improved electrical conductivity and EMI shielding properties. For a quantitative comparison to observe the excluded-volume effects, a CNT composite without micro-silica was measured in parallel with the other sample.

Gelation of micellar solutions of diblock-copoly (oxyethylene/oxybutylene) in aqueous K2SO4. An investigation of excluded volume effects

1995 ◽  
Vol 33 (7) ◽  
pp. 1085-1096 ◽  
Author(s):  
Nan-Jie Deng ◽  
Yun-Zhu Luo ◽  
Siriporn Tanodekaew ◽  
Nicole Bingham ◽  
David Attwood ◽  
...  
Keyword(s):  
Excluded Volume ◽  
Micellar Solutions ◽  
Excluded Volume Effects ◽  
Volume Effects

Excluded volume effects and fractional viscoelasticity in polymers

Meccanica ◽  
2021 ◽  
Author(s):  
Somayeh Mashayekhi ◽  
Eugenia Stanisauskis ◽  
Mahdi Hassani ◽  
William Oates
Keyword(s):  
Excluded Volume ◽  
Fractional Viscoelasticity ◽  
Excluded Volume Effects ◽  
Volume Effects

Transcapillary exchange of molecular weight markers in the postglomerular circulation: application of a barrier-limited model

1982 ◽  
Vol 242 (5) ◽  
pp. F436-F446
Author(s):  
C. Trainor ◽  
M. Silverman
Keyword(s):  
Molecular Weight ◽  
Excluded Volume ◽  
Excluded Volume Effects ◽  
Multiple Indicator Dilution ◽  
Filtration Barrier ◽  
Transit Times ◽  
Multiple Indicator ◽  
Dilution Experiments ◽  
Volume Effects

The permselectivity of the postglomerular capillary wall was studied by performing pulse-injection multiple indicator-dilution experiments on dog kidneys in vivo, using simultaneous injection of T1824-labeled albumin (plasma reference), creatinine (extracellular reference), and one or two radioactively labeled indicators: raffinose (595 dalton), vitamin B12 (1,357 dalton), or inulin (approximately 5,000 dalton). The urine transit patterns superimposed for all these except albumin, suggesting equal permeability for these molecular weight markers at the level of the glomerular filtration barrier. But the renal vein mean transit times progressively decreased. Therefore, their apparent interstitial volumes of distribution decrease with increasing molecular weight. This could be due to several factors acting singly or in combination: reduced capillary permeability in the postglomerular microcirculation; restricted diffusion in the postglomerular interstitium; or excluded volume effects. Evidence suggested that the effect was due to a combination of permeability and exclusion volume effects. To assess the validity of this assumption, the barrier-limited model was compared with the experimental data. The results were analyzed (both hydropenic and mannitol-diuretic dogs) and best fits calculated using two independent parameters, permeability and excluded volume. For permeability (X10(-4) cm/s, mean +/- SD) the range of values was always greater than or equal to 15 for creatinine and raffinose, and greater than or equal to 12 for B12. The permeability for inulin was 6.9 +/- 1.4. When interstitial volume excluded was expressed as percentage of the volume available to creatine, the excluded volume was negligible for raffinose and B12 but 12 +/- 5% for inulin. During mannitol diuresis the permeability for creatinine and raffinose remained high, but the values tended to decrease for B12. The permeability of inulin decreased to 2.9 +/- 0.09. Mannitol diuresis increased the excluded volume of inulin but did not alter the creatinine, raffinose, or B12 value.

scholarly journals Second cluster integral and excluded volume effects for the pion gas

2001 ◽  
Vol 63 (4) ◽  
Author(s):  
A. Kostyuk ◽  
M. Gorenstein ◽  
H. Stöcker ◽  
W. Greiner
Keyword(s):  
Excluded Volume ◽  
Excluded Volume Effects ◽  
Volume Effects

scholarly journals Topological characteristics of circular DNA: excluded volume effects

1988 ◽  
Vol 4 (2) ◽  
pp. 85-90
Author(s):  
K. V. Klenin ◽  
A. V. Vologodskii ◽  
V. V. Anshelevich ◽  
A. M. Dykhne ◽  
M. D. Frank-Kamenetskii
Keyword(s):  
Excluded Volume ◽  
Circular Dna ◽  
Excluded Volume Effects ◽  
Topological Characteristics ◽  
Volume Effects

scholarly journals Diffusion of multiple species with excluded-volume effects

2012 ◽  
Vol 137 (20) ◽  
pp. 204116 ◽  
Author(s):  
Maria Bruna ◽  
S. Jonathan Chapman
Keyword(s):  
Excluded Volume ◽  
Excluded Volume Effects ◽  
Multiple Species ◽  
Volume Effects

scholarly journals Excluded-volume effects in linear polymers: Universality of generalized self-avoiding walks

1985 ◽  
Vol 31 (7) ◽  
pp. 4659-4662 ◽  
Author(s):  
R. Dekeyser ◽  
A. Maritan ◽  
A. L. Stella
Keyword(s):  
Excluded Volume ◽  
Linear Polymers ◽  
Excluded Volume Effects ◽  
Self Avoiding Walks ◽  
Volume Effects

Dielectric and Electrical Conductivity Studies of Carbon Nanotube‐Polymer Composites

2021 ◽  
pp. 1-25
Author(s):  
Anjaly Sivadas ◽  
H. Akhina ◽  
M. S. Mrudula ◽  
Nithin Chandran
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Polymer Composites
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