Constructing dual ionically cross-linked poly(acrylamide-co-acrylic acid) /chitosan hydrogel materials embedded with chitosan decorated halloysite nanotubes for exceptional mechanical performance
- Authors
- Li S.-N.; Li B.; Yu Z.-R.; Li Y.; Guo K.-Y.; Gong L.-X.; Feng Y.; Jia D.; Zhou Y.; Tang L.-C.
- Issue Date
- Aug-2020
- Publisher
- Elsevier Ltd
- Keywords
- Dual cross-linked networks; Halloysite nanotubes; Mechanical properties; Nanocomposite hydrogel; Self-recoverability
- Citation
- Composites Part B: Engineering, v.194
- Journal Title
- Composites Part B: Engineering
- Volume
- 194
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/60116
- DOI
- 10.1016/j.compositesb.2020.108046
- ISSN
- 1359-8368
- Abstract
- Hydrogels with exceptional mechanical properties at high water content are crucial need for practical applications in various fields. However, achieving a hydrogel possessed splendid mechanical performance with well trade-off between tensile strength and toughness is highly demanded due to the mechanical weakness of conventional hydrogel. Herein, we report a novel kind of nanocomposite hydrogel developed by integrating chitosan decorated halloysite nanotubes (CS-f-HNTs) into dual cross-linked structure composed of chemical and Fe3+ induced ionically cross-linked network. Combining the nanoparticle reinforcement with physical interactions including hydrogen bonds among polymer chains and ionic coordination interaction between Fe3+ ions and functional groups on chitosan chains and the copolymer chains, the hydrogel exhibits extraordinary and balanced mechanical performance, including high strength (3.06 MPa), outstanding stretchability (>2000%) and superior toughness (47.6 MJ m−3) in which water content remains ~80 wt%. Based on microstructure observation and dynamic mechanical behavior analysis, we demonstrated that the addition of CS-f-HNTs effectively bridged polymer chains via physical interactions and strengthened dual cross-linked network, leading to significant improved mechanical properties. Moreover, the hydrogels also possessed remarkable self-recoverability (97.9% for small strain (200%) and 91.5% for large strain (1000%)) at room temperature and the related mechanism was discussed. The strategy developed herein may provide a newfound avenue in the design and development of strong and tough hydrogel for promising applications in loading-bearing structural materials. © 2020 Elsevier Ltd
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/60116)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.