Hierarchical structural double network hydrogel with high strength, toughness, and good recoverability. (2nd November 2017)

• Record Type: Journal Article
• Authors: Xiang, Shuangfei; Qian, Wangqiu; Li, Ting; Wang, Yang; Chen, Mingqing; Ma, Piming; Dong, Weifu
• Is Part Of: New journal of chemistry. Volume 41:Number 23(2017)
• Page Start: 14397
• Page End: 14402
• Publication Date: 2017-11-02
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c7nj03263c
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Hierarchical structural double network hydrogel (H-DN gel) was prepared with high strength (tensile fracture stress ∼6.1 MPa), toughness (13.6 MJ m −3 ) and good recoverability. Abstract : Hierarchical structural double network hydrogel (H-DN gel) was fabricated by inducing ferric coordination crosslinkers in the second network of PAMPS/P(AAm–AAc) double network hydrogel. Investigations of the tensile and compressive properties indicated that the H-DN gel exhibited a dramatic enhancement in the Young's modulus, tensile ultimate strength, toughness, compressive modulus and stress, compared to traditional double network hydrogels. H-DN hydrogel exhibited good recoverability that remained at ∼70% of the initial dissipated energy after resting at 60 °C for 15 min. Finally, scanning electron microscopy (SEM) revealed that the amount of embedded micro-network structures in H-DN gel became more intensive and the walls got thicker.