Next Article in Journal
Previous Article in Journal
Int. J. Mol. Sci. 2013, 14(11), 22380-22394; doi:10.3390/ijms141122380
Article

Superior Mechanical Properties of Double-Network Hydrogels Reinforced by Carbon Nanotubes without Organic Modification

* ,
,
,
,
 and *
Received: 23 September 2013; in revised form: 22 October 2013 / Accepted: 30 October 2013 / Published: 13 November 2013
(This article belongs to the Section Material Sciences and Nanotechnology)
View Full-Text   |   Download PDF [4423 KB, uploaded 19 June 2014]   |   Browse Figures
Abstract: A facile method is developed to fabricate nanocomposite double-network (DN) gels with excellent mechanical properties, which do not fracture upon loading up to 78 MPa and a strain above 0.98, by compositing of carbon nanotubes (CNTs) without organic modification. Investigations of swelling behaviors, and compressive and tensile properties indicate that equilibrium swelling ratio, compressive modulus and stress, fracture stress, Young’s modulus, and yield stress are significantly improved in the presence of CNTs. Scanning electron microscopy (SEM) reveals that the pore size of nanocomposite DN gels is decreased and some embedded micro-network structures are observed on the fracture surface in comparison to DN gels without CNTs, which leads to the enhancement of mechanical properties. The compressive loading-unloading behaviors show that the area of hysteresis loop, dissipated energy, for the first compressive cycle, increases with addition of CNTs, which is much higher than that for the successive cycles. Furthermore, the energy dissipation mechanism, similar to the Mullins effect observed in filled rubbers, is demonstrated for better understanding the nanocomposite DN polymer gels with CNTs.
Keywords: nanocomposite hydrogels; double network; CNTs; mechanical strength nanocomposite hydrogels; double network; CNTs; mechanical strength
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Dong, W.; Huang, C.; Wang, Y.; Sun, Y.; Ma, P.; Chen, M. Superior Mechanical Properties of Double-Network Hydrogels Reinforced by Carbon Nanotubes without Organic Modification. Int. J. Mol. Sci. 2013, 14, 22380-22394.

AMA Style

Dong W, Huang C, Wang Y, Sun Y, Ma P, Chen M. Superior Mechanical Properties of Double-Network Hydrogels Reinforced by Carbon Nanotubes without Organic Modification. International Journal of Molecular Sciences. 2013; 14(11):22380-22394.

Chicago/Turabian Style

Dong, Weifu; Huang, Chiguang; Wang, Yang; Sun, Yujie; Ma, Piming; Chen, Mingqing. 2013. "Superior Mechanical Properties of Double-Network Hydrogels Reinforced by Carbon Nanotubes without Organic Modification." Int. J. Mol. Sci. 14, no. 11: 22380-22394.



Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert