Interfacial interactions and structure of organic-inorganic nanohybrids

Zeng, Q. H., Yu, A. B., Lu, G. Q. and Standish, R. K. (2005) Interfacial interactions and structure of organic-inorganic nanohybrids. Journal of Materials Science and Technology, 21 Suppl. 1: 114-118.

Author Zeng, Q. H.
Yu, A. B.
Lu, G. Q.
Standish, R. K.
Title Interfacial interactions and structure of organic-inorganic nanohybrids
Journal name Journal of Materials Science and Technology   Check publisher's open access policy
ISSN 1005-0302
Publication date 2005-06
Sub-type Article (original research)
Volume 21
Issue Suppl. 1
Start page 114
End page 118
Total pages 5
Place of publication Shenyang, China
Publisher Zhongguo Kexueyuan Jinshu Yanjiusuo
Language eng
Abstract Understanding the interfacial interactions and structure is important to better design and application of organic-inorganic nanohybrids. This paper presents our recent molecular dynamic studies on organoclays and polymer nanocomposites, including the layering behavior of organoclays, structural and dynamic properties of dioctadecyldimethyl ammoniums in organoclays, and interfacial interactions and structure of polyurethane nanocomposites. The results demonstrate that the layering behaviors of organoclays are closely related to the chain length of quaternary alkyl ammoniums and cation exchangeable capacity of clays. In addition to typical layered structures such as monolayer, bilayer and pseudo-trilayer, a pseudo-quadrilayer structure was also observed in organoclays modified with dioctadecyldimethyl ammoniums (DODDMA). In such a structure, alkyl chains do not lie flat within a single layer but interlace, and also jump to the next layer or even the next nearest layer. Moreover, the diffusion constants of nitrogen and methylene atoms increase with the temperature and methelene towards the tail groups. For polyurethane nanocomposite, the van der Waals interaction between apolar alkyl chains and soft segments of polyurethane predominates the interactions between organoclay and polyurethane. Different from most bulk polyurethane systems, there is no distinct phase-separated structure for the polyurethane.
Keyword Nanohybrids
Molecular dynamics simulation
Clay minerals
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Australian Institute for Bioengineering and Nanotechnology Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Mon, 13 Aug 2007, 15:20:47 EST