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Covalent/crystallite cross-linked co-network hydrogels : an efficient and simple strategy for mechanically strong and tough hydrogels

Khan, Masihullah Jabarulla, Zhang, Jin and Guo, Qipeng 2016, Covalent/crystallite cross-linked co-network hydrogels : an efficient and simple strategy for mechanically strong and tough hydrogels, Chemical engineering journal, vol. 301, pp. 92-102, doi: 10.1016/j.cej.2016.04.025.

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Title Covalent/crystallite cross-linked co-network hydrogels : an efficient and simple strategy for mechanically strong and tough hydrogels
Author(s) Khan, Masihullah Jabarulla
Zhang, JinORCID iD for Zhang, Jin orcid.org/0000-0002-4257-8148
Guo, Qipeng
Journal name Chemical engineering journal
Volume number 301
Start page 92
End page 102
Total pages 11
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-10-01
ISSN 1385-8947
Summary Covalent/crystallite cross-linked co-network hydrogels have been prepared using epoxy and PVA through a cyclic freezing-thawing process. The PVA/epoxy hydrogels show enhanced mechanical strength and toughness. PVA/epoxy hydrogels with 4 wt% epoxy loading display maximum tensile strength and toughness of 1.1 MPa and 2838 kJ/m3 respectively. The fracture toughness of PVA/epoxy hydrogels ranges from 160 to 450 J/m2. Radius of gyration and fractal information of the hydrogels were obtained by fitting the SAXS data to the Guinier and power law models. The enhanced mechanical properties are attributed to the increase in covalent bonding and decrease in crystallite distribution with an increase in epoxy content. However a larger hysteresis is shown for PVA/epoxy hydrogels due to irreversible destruction of covalent bonds between epoxy and PVA.
Language eng
DOI 10.1016/j.cej.2016.04.025
Field of Research 091209 Polymers and Plastics
Socio Economic Objective 860607 Plastic Products (incl. Construction Materials)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083393

Document type: Journal Article
Collection: Institute for Frontier Materials
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