Facile Synthesis of Tough Double Network Hydrogel
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Facile Synthesis of Tough Double Network Hydrogel Jilong Wang, Junhua Wei and Jingjing Qiu MRS Advances / FirstView Article / August 2016, pp 1 - 6 DOI: 10.1557/adv.2016.127, Published online: 15 February 2016
Link to this article: http://journals.cambridge.org/abstract_S2059852116001274 How to cite this article: Jilong Wang, Junhua Wei and Jingjing Qiu Facile Synthesis of Tough Double Network Hydrogel. MRS Advances, Available on CJO 2016 doi:10.1557/adv.2016.127 Request Permissions : Click here
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MRS Advances © 2016 Materials Research Society DOI: 10.1557/adv.2016.127
Facile Synthesis of Tough Double Network Hydrogel Jilong Wang1, Junhua Wei1 and Jingjing Qiu1,* Department of Mechanical Engineering, Texas Tech University, 2500 Broadway, P.O. Box 43061, Lubbock, TX 79409, U.S.A. * E-mail: [email protected]; Phone: 806.742.3563; Fax: 506.742.3540. 1
ABSTRACT In this paper, a facile and novel method was developed to fabricate high toughness and stiffness double network hydrogels made of ionical-linked natural hydrogel and synthetic hydrogel. The synthetic hydrogel network is formed firstly, and then the gel is soaked in the ionic solution to build second network to form double network hydrogel with high toughness and stiffness. Two different natural polymers, alginate and chitosan, are employed to build rigid and brittle network and poly(acrylamide) is used as soft network in double network hydrogel. The compressive strength of Calcium alginate/poly(acrylamide) double network hydrogels is increased twice than that of poly(acrylamide) single network hydrogels, and the Ca2+ ionically cross-linked alginate is the key to improve the compressive property of double network hydrogels as a sacrificial bond. However, the chitosan/poly(acrylamide) double network hydrogels exhibit no enhancement of compressive strength comparing to poly(acrylamide) single network hydrogels. INTRODUCTION Hydrogels [1, 2], three-dimensional cross-linked polymer containing a large amount of water (50–90%), have been widely employed as super-absorbents [3, 4], drug-delivery systems [5], and in tissue engineering. However, the poor mechanical performance of most hydrogel has limited further biomedical applications and tissue engineering such as cartilage replacement [6, 7] and artificial muscles or nerves [8-11]. Recently, abounding attentions have been received to enhance the mechanical performance of hydrogels. Double network hydrogels exhibited excellent mechanical properties via tuning the interactions, ratios and structures between two cross-linked networks [11-17]. In previous studies, agar/poly(acrylamide) (PAAm) has been synthesized to achieve remarkable mechanical properties through a one-pot method. After that, alginate/poly(acrylamide) is also widely investigated via similar one-pot method, which exhibits improved mechanica
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