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Erschienen in: Polymer Bulletin 11/2018

15.03.2018 | Original Paper

Characterization and swelling–deswelling properties of porous superabsorbent hydrogel membranes made of PVA and Ziziphus spina-christi fibers reinforced with nanosilica manufactured by compression moulding process

verfasst von: E. M. Abdel Bary, Ahmed Fekri, Yaser A. Soliman, Ammar N. Harmal

Erschienen in: Polymer Bulletin | Ausgabe 11/2018

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Abstract

Novel superabsorbent membranes consisting of polyvinyl alcohol (PVA), cellulose nanocrystals originated from Ziziphus spina-christi fibers, nanosilica, glutaraldehyde, and glycerin (G) were manufactured by compression moulding process. Ziziphus spina-christi fibers are a new source to isolate pure cellulose nanocrystals via mechanical and chemical treatment. Ziziphus spina-christi fibers were used to improve water-saving irrigation systems. Glycerin was used to increase the elasticity of superabsorbent membranes. These membranes were characterized by FTIR, XRD, SEM, mechanical testing, and thermal analysis. Superabsorbent membranes showed greater equilibrium swelling capacity compared with neat cross-linked PVA. Moreover, water transport mechanism of all superabsorbent membranes followed Fickian diffusion type. Superabsorbent membranes exhibited good pH-dependent swelling reversibility and high-water retention capacity, making it more efficient water-saving material. The superabsorbent membranes were also investigated for antimicrobial activities against pathogenic bacteria like Candida albicans (fungus), Bacillus subtilis (G+ve), Staphylococcus aureus (G+ve), Proteus vulgaris (G−ve), and Erwinia carotovora (G−ve). The results showed that design of innovative bioactive superabsorbent membranes is promising for the water reservoir, which might be most profitable in agricultural applications.

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Metadaten
Titel
Characterization and swelling–deswelling properties of porous superabsorbent hydrogel membranes made of PVA and Ziziphus spina-christi fibers reinforced with nanosilica manufactured by compression moulding process
verfasst von
E. M. Abdel Bary
Ahmed Fekri
Yaser A. Soliman
Ammar N. Harmal
Publikationsdatum
15.03.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Polymer Bulletin / Ausgabe 11/2018
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-018-2315-0

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