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Polymers 2018, 10(8), 835; https://doi.org/10.3390/polym10080835

Graphene Oxide Reinforced Alginate/PVA Double Network Hydrogels for Efficient Dye Removal

1
Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang 471023, China
2
Material Science and Engineering School, Zhengzhou University, Zhengzhou 450001, China
*
Authors to whom correspondence should be addressed.
Received: 8 June 2018 / Revised: 24 July 2018 / Accepted: 25 July 2018 / Published: 28 July 2018
(This article belongs to the Special Issue Microgels and Hydrogels at Interfaces)
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Abstract

Dually crosslinked graphene oxide reinforced alginate/polyvinyl alcohol (PVA) double network (DN) hydrogels were prepared via a facile freeze/thaw method followed by soaking in a Ca2+ solution. The morphology and structure of the hydrogels were systematically examined by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The effects of pH, dosage of hydrogel, adsorption time, and temperature on the adsorptive property of DN hydrogels towards methylene blue (MB) were also studied. Results indicated that the hydrogels exhibited typical 3D porous structures and had an efficient adsorption effect towards MB due to strong interactions between DN hydrogels and MB molecules. The adsorption isotherm was found to coincide with the Langmuir model with a monolayer adsorption. The highest adsorption capacity of DN hydrogels for MB was examined as 480.76 mg·g−1. View Full-Text
Keywords: sodium alginate; PVA; graphene oxide; double network hydrogel; adsorption sodium alginate; PVA; graphene oxide; double network hydrogel; adsorption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liu, C.; Liu, H.; Xiong, T.; Xu, A.; Pan, B.; Tang, K. Graphene Oxide Reinforced Alginate/PVA Double Network Hydrogels for Efficient Dye Removal. Polymers 2018, 10, 835.

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