Entropy dominated behaviors of confined polymer-nanoparticle composites

doi:10.1088/1674-1056/21/11/118202

Abstract The stretched polymers would lose their possible configurations if they are mixed with nanoparticles or touch on 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 polymers in order to reach a minimum free energy for the total system, are adsorbed on hard walls even by losing their conformation. The understanding based on the current study provides a simple yet effective approach for the design of thin polymer composites.

Keywords: conformation entropy nanoparticle depletion attraction thin polymer layer

Received: 19 June 2012
Revised: 20 July 2012
Accepted manuscript online:

PACS:	82.35.Np	(Nanoparticles in polymers)
	34.20.Gj	(Intermolecular and atom-molecule potentials and forces)
	36.20.Ey	(Conformation (statistics and dynamics))

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974162 and 11074208).

Corresponding Authors: Wu Chen-Xu
E-mail: cxwu@xmu.edu.cn

Cite this article:

Cao Xue-Zheng (曹学正), Merlitz Holger, Sommer Jens-Uwe, Wu Chen-Xu (吴晨旭 ) Entropy dominated behaviors of confined polymer-nanoparticle composites 2012 Chin. Phys. B 21 118202

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