中国物理B ›› 2012, Vol. 21 ›› Issue (11): 118202-118202.doi: 10.1088/1674-1056/21/11/118202

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Entropy dominated behaviors of confined polymer-nanoparticle composites

曹学正a, Merlitz Holgera b, Sommer Jens-Uweb, 吴晨旭a   

  1. a Department of Physics and ITPA, Xiamen University, Xiamen 361005, China;
    b Leibniz-Institut für Polymerforschung Dresden, Dresden 01069, Germany
  • 收稿日期:2012-06-19 修回日期:2012-07-20 出版日期:2012-10-01 发布日期:2012-10-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10974162 and 11074208).

Entropy dominated behaviors of confined polymer-nanoparticle composites

Cao Xue-Zheng (曹学正)a, Merlitz Holgera b, Sommer Jens-Uweb, Wu Chen-Xu (吴晨旭 )a   

  1. a Department of Physics and ITPA, Xiamen University, Xiamen 361005, China;
    b Leibniz-Institut für Polymerforschung Dresden, Dresden 01069, Germany
  • Received:2012-06-19 Revised:2012-07-20 Online:2012-10-01 Published:2012-10-01
  • Contact: Wu Chen-Xu E-mail:cxwu@xmu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10974162 and 11074208).

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摘要： 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.

关键词: conformation entropy, nanoparticle, depletion attraction, thin polymer layer

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.

Key words: conformation entropy, nanoparticle, depletion attraction, thin polymer layer

中图分类号:  (Nanoparticles in polymers)

  • 82.35.Np
34.20.Gj (Intermolecular and atom-molecule potentials and forces) 36.20.Ey (Conformation (statistics and dynamics))