Dispersion and its relation to carbon nanotube concentration in polyimide nanocomposites
Characterization of Carbon Nanotube (CNT) dispersion in a polyimide matrix and its effect on nanocomposite mechanical properties is presented in this paper. CNT bundle aspect ratio, measured by voltage-contrast scanning electron microscopy, is determined to be the quantitative measurement of dispers...
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| Veröffentlicht in: | Composites science and technology 2013-08, Vol.85, p.43-49 |
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| creator | Misiego, C. Rocio Pipes, R. Byron |
| description | Characterization of Carbon Nanotube (CNT) dispersion in a polyimide matrix and its effect on nanocomposite mechanical properties is presented in this paper. CNT bundle aspect ratio, measured by voltage-contrast scanning electron microscopy, is determined to be the quantitative measurement of dispersion and is found to decrease with increase in nanotube concentration. The reduction of CNT bundle aspect ratio with concentration is shown to explain the less effective reinforcement observed in composites as CNT concentration is increased beyond the electrical percolation concentration. It is shown that increase in CNT concentration beyond percolation concentration does not yield proportional improvement in elastic modulus because CNT aspect ratio systematically decreases as concentration increases. A modified Cox micromechanical model that accounts for the actual nanotube bundle aspect ratio as a function of concentration, nanotube waviness and orientation is shown to predict the observed nanocomposite elastic modulus dependence upon concentration. |
| doi_str_mv | 10.1016/j.compscitech.2013.05.011 |
| format | Article |
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Scanning electron microscopy (SEM)</subject><subject>Dispersions</subject><subject>Exact sciences and technology</subject><subject>Forms of application and semi-finished materials</subject><subject>Mathematical models</subject><subject>Nanocomposites</subject><subject>Nanomaterials</subject><subject>Nanostructure</subject><subject>Polymer industry, paints, wood</subject><subject>Technology of polymers</subject><subject>Waviness</subject><issn>0266-3538</issn><issn>1879-1050</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqNkE1rFEEQhhuJ4Cb6H8ZDIJeZVH_PHMNqNBDwouCtqenuxV5muyfdvUL-vb1uEG96qqJ46q3iIeQ9hYECVbf7wabDWmyo3v4YGFA-gByA0ldkQ0c99RQkXJANMKV6Lvn4hlyWsgcALSe2Id8_hLL6XEKKHUbXhVq67Besp0FNncU8ty5iTPU4-86maH2s-QyE2K1peQ6H4Pxv5vRMKu2Z8pa83uFS_LuXekW-3X_8uv3cP3759LC9e-ytoLr2TFOYrbJazI5NM5v4zCR1ChVDRC406ElIBdgQJedR0lGgcII7hnw3On5Fbs65a05PR1-qOYRi_bJg9OlYDJWguBrVpP-NCjFqqjidGjqdUZtTKdnvzJrDAfOzoWBO4s3e_CXenMQbkKaJb7vXL2ewWFx2GaMN5U8A0wqkoLJx2zPnm56fwWfT0nzT60L2thqXwn9c-wUQ8p_R</recordid><startdate>20130821</startdate><enddate>20130821</enddate><creator>Misiego, C. 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Byron</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dispersion and its relation to carbon nanotube concentration in polyimide nanocomposites</atitle><jtitle>Composites science and technology</jtitle><date>2013-08-21</date><risdate>2013</risdate><volume>85</volume><spage>43</spage><epage>49</epage><pages>43-49</pages><issn>0266-3538</issn><eissn>1879-1050</eissn><coden>CSTCEH</coden><abstract>Characterization of Carbon Nanotube (CNT) dispersion in a polyimide matrix and its effect on nanocomposite mechanical properties is presented in this paper. CNT bundle aspect ratio, measured by voltage-contrast scanning electron microscopy, is determined to be the quantitative measurement of dispersion and is found to decrease with increase in nanotube concentration. The reduction of CNT bundle aspect ratio with concentration is shown to explain the less effective reinforcement observed in composites as CNT concentration is increased beyond the electrical percolation concentration. It is shown that increase in CNT concentration beyond percolation concentration does not yield proportional improvement in elastic modulus because CNT aspect ratio systematically decreases as concentration increases. A modified Cox micromechanical model that accounts for the actual nanotube bundle aspect ratio as a function of concentration, nanotube waviness and orientation is shown to predict the observed nanocomposite elastic modulus dependence upon concentration.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.compscitech.2013.05.011</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 0266-3538 |
| ispartof | Composites science and technology, 2013-08, Vol.85, p.43-49 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | A. Carbon nanotubes A. Nanocomposites Applied sciences Aspect ratio B. Mechanical properties Bundling C. Modeling Composites D. Scanning electron microscopy (SEM) Dispersions Exact sciences and technology Forms of application and semi-finished materials Mathematical models Nanocomposites Nanomaterials Nanostructure Polymer industry, paints, wood Technology of polymers Waviness |
| title | Dispersion and its relation to carbon nanotube concentration in polyimide nanocomposites |
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