Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 165, Issue -, Pages 2721-2730Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.10.059
Keywords
Galactomannan-based hydrogels; Metal coordination; Reconstruction
Funding
- National Key Research and Development Program of China [2016YFD0600803]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Ask authors/readers for more resources
Application of abundant hemicelluloses polysaccharides on functional materials are of much interest. In this work, galactomannan (GM) hydrogels were prepared by dual hydrogen bonding interactions with polymerized poly-acrylic acid (AA) and poly-N-isopropylacrylamide (NIPAM). The hydrogels showed a series of novel and distinctive properties through in situ metal ions immersion. Highly improved ductility with a tensile strain of 230% and tensile stress of 390 kPa were exhibited by PAN-GM-Cu and PAN-GM-Fe respectively. More interestingly, the spontaneous metal ions capture into the network successfully actuated the sensitive curving and shape reconstruction behaviors of the hydrogels to varying degrees, which were tuned by the concentration of the metal ions. X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy IR) proved the formation of new coordination bonds between Cu2+/Fe3+ and carboxylates/hydroxyls groups that reinforced and swelled the networks into different curving states. After the curving, PAN-GM-Cu exhibited more satisfied mechanical properties due to the distinctive morphological distribution of Cu2+ on the pores layers of the hydrogels. The intelligent hydrogels proposed in this work would provide new strategies for effective metal ions adsorption, which can be potentially applied on devices actuating, metal ions pollution water treatments, self-reinforcement and shape reconstruction. (C) 2020 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available