Issue 19, 2010
From the journal:

Journal of Materials Chemistry

Preparation, stability and rheology of polyacrylamide/pristine layered double hydroxide nanocomposites†

Pingjun Fu,ab   Kongli Xu,ad   Hongzan Song,cd   Guangming Chen,*a   Jiping Yang*b  and  Yanhua Niu*c  

* Corresponding authors

a Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
E-mail: chengm@iccas.ac.cn

b School of Material Science and Engineering, Beihang University, Beijing, P. R. China
E-mail: jyang@buaa.edu.cn

c Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
E-mail: yhniu@iccas.ac.cn

d Graduate School of Chinese Academy of Sciences, Beijing, P. R. China

Abstract

Novel polyacrylamide (PAM)/pristine layered double hydroxide (LDH) nanocomposites have been prepared by a facile solution dispersion procedure, and their stability and rheological properties have been studied. The pristine LDHs without any surface organo-modification (LDH_NO3), synthesized by co-precipitation procedure, are dramatically exfoliated and uniformly dispersed in formamide. Subsequently, PAM/LDH_NO3 nanocomposites are prepared by a convenient solution dispersion procedure, wherein the dispersion structure of LDH_NO3 in PAM was studied by X-ray diffraction, size distribution measurements and Tyndall effect. The nanocomposites exhibit excellent stabilities toward various environmental conditions such as heating, centrifugation and salt-tolerance. Moreover, in the whole process of drying and after the re-dissolution, the nanocomposites kept a uniform dispersion structure without any precipitation formation. Finally, the dynamic and steady rheological investigations were conducted. Nanoscale LDH_NO3 particles and layers were found to have drastic effects on the PAM solution rheological behaviour with an obvious gel-formation process at a low LDH content, and strong frequency dependence of viscosity at low frequencies.

Graphical abstract: Preparation, stability and rheology of polyacrylamide/pristine layered double hydroxide nanocomposites

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Article information

DOI
https://doi.org/10.1039/B927391C
Article type
Paper
Submitted
04 Jan 2010
Accepted
18 Feb 2010
First published
15 Mar 2010

J. Mater. Chem., 2010,20, 3869-3876

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Preparation, stability and rheology of polyacrylamide/pristine layered double hydroxide nanocomposites

P. Fu, K. Xu, H. Song, G. Chen, J. Yang and Y. Niu, J. Mater. Chem., 2010, 20, 3869 DOI: 10.1039/B927391C

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