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Article

Novel Graphene Oxide Nanohybrid Doped Methacrylic Acid Hydrogels for Enhanced Swelling Capability and Cationic Adsorbability

by 1,2,3, 1, 1,2, 1,2, 1, 1, 1 and 1,2,*
1
Key Laboratory of Optoelectronic Technology & Systems, Chongqing University, Ministry of Education, Chongqing 400044, China
2
Centre for Intelligent Sensing Technology, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
3
Centre for Nano Health, College of Science, Swansea University, Singleton Park, Swansea SA2 8PP, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Andrea Mura
Polymers 2021, 13(7), 1112; https://doi.org/10.3390/polym13071112
Received: 15 March 2021 / Revised: 25 March 2021 / Accepted: 29 March 2021 / Published: 1 April 2021
Novel versatile hydrogels were designed and composited based on covalent bond and noncovalent bond self-assembly of poly(methacrylic acid) (PMAA) networks and nanohybrids doped with graphene oxide (GO). The structures and properties of the neat PMAA and the prepared PMAA/GO hydrogels were characterized and analyzed in detail, using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, swelling and cationic absorption, etc. The swelling results showed that the water penetration follows the non-Fick transport mechanism based on swelling kinetics and diffusion theory. The swelling capacity of PMAA and composited PMAA/GO hydrogels toward pH, Na+, Ga2+, and Fe3+ was investigated; the swelling ratio was tunable between 4.44 and 36.44. Taking methylene blue as an example, the adsorption capacity of PMAA/GO hydrogels was studied. Nanohybrid doped GO not only self-associated with PMAA via noncovalent bonding interactions and had a tunable swelling ratio, but also interacted with water molecules via electrostatic repulsion, offering a pH response of both the network and dye absorption. Increases in pH caused a rise in equilibrium swelling ratios and reduced the cumulative cationic dye removal. View Full-Text
Keywords: nanohybrid hydrogel; ion and pH response; cationic dyes adsorbent nanohybrid hydrogel; ion and pH response; cationic dyes adsorbent
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MDPI and ACS Style

Liu, Y.; Lyu, Y.; Hu, Y.; An, J.; Chen, R.; Chen, M.; Du, J.; Hou, C. Novel Graphene Oxide Nanohybrid Doped Methacrylic Acid Hydrogels for Enhanced Swelling Capability and Cationic Adsorbability. Polymers 2021, 13, 1112. https://doi.org/10.3390/polym13071112

AMA Style

Liu Y, Lyu Y, Hu Y, An J, Chen R, Chen M, Du J, Hou C. Novel Graphene Oxide Nanohybrid Doped Methacrylic Acid Hydrogels for Enhanced Swelling Capability and Cationic Adsorbability. Polymers. 2021; 13(7):1112. https://doi.org/10.3390/polym13071112

Chicago/Turabian Style

Liu, Yufei, Ying Lyu, Yongqin Hu, Jia An, Rubing Chen, Meizhu Chen, Jihe Du, and Chen Hou. 2021. "Novel Graphene Oxide Nanohybrid Doped Methacrylic Acid Hydrogels for Enhanced Swelling Capability and Cationic Adsorbability" Polymers 13, no. 7: 1112. https://doi.org/10.3390/polym13071112

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