Entropy dominated behaviors of confined polymer-nanoparticle composites |
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| Authors: | Cao Xue-Zheng a Merlitz Holger ab Sommer Jens-Uwe b and Wu Chen-Xu |
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| Affiliation: | a) a) Department of Physics and ITPA,Xiamen University,Xiamen 361005,China b) Leibniz-Institut fr Polymerforschung Dresden,Dresden 01069,Germany |
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| Abstract: | Stretched polymers will lose their possible configurations if they are mixed with nanoparticles or touch a hard wall,which leads to a strong depletion attraction responsible for the enrichment of nanoparticles near substrates.Moreover,it is found that there exists a sacrifice mechanism in confined pure polymer samples or polymer-nanoparticle mixtures,that part of the polymers,in order to reach a minimum free energy for the total system,are adsorbed on hard walls even though they lose their conformation.The current study provides a simple yet effective approach for the design of thin polymer composites. |
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| Keywords: | conformation entropy nanoparticle depletion attraction thin polymer layer |
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