pH-Responsive Eco-Friendly Chitosan–Chlorella Hydrogel Beads for Water Retention and Controlled Release of Humic Acid

For improving the mechanical strength of controlled release fertilizer (CRF) hydrogels, a novel material of Chlorella was employed as a bio-based filler to prepare chitosan–chlorella hydrogel beads with physical crosslink method. Here, the synthesis mechanism was investigated, and the chitosan–chlor...

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Bibliographic Details
Main Authors: Bai, B. (Author), Cao, F. (Author), Li, H. (Author), Luo, Y. (Author), Wang, J. (Author)
Format: Article
Language:English
Published: MDPI 2022
Subjects:
Online Access:View Fulltext in Publisher
LEADER 02459nam a2200433Ia 4500
001 10.3390-w14081190
008 220510s2022 CNT 000 0 und d
020 |a 20734441 (ISSN) 
245 1 0 |a pH-Responsive Eco-Friendly Chitosan–Chlorella Hydrogel Beads for Water Retention and Controlled Release of Humic Acid 
260 0 |b MDPI  |c 2022 
856 |z View Fulltext in Publisher  |u https://doi.org/10.3390/w14081190 
520 3 |a For improving the mechanical strength of controlled release fertilizer (CRF) hydrogels, a novel material of Chlorella was employed as a bio-based filler to prepare chitosan–chlorella hydrogel beads with physical crosslink method. Here, the synthesis mechanism was investigated, and the chitosan–chlorella hydrogel beads exhibited enhanced mechanical stability under centrifugation and sonication than pure chitosan hydrogel beads. Chlorella brought more abundant functional groups to original chitosan hydrogel, hence, chitosan–chlorella hydrogel beads represented greater sensitivity and controllable response to external factors including pH, salt solution, temperature. In distilled water, the hydrogel beads with 40 wt% Chlorella reached the largest water absorption ratio of 42.92 g/g. Moreover, the mechanism and kinetics process of swelling behavior of the chitosan–chlorella hydrogel beads were evaluated, and the loading and releasing of humic acid by the hydrogel beads as a carrier material were pH-dependent and adjustable, which exhibit the potential of chitosan–chlorella hydrogel beads in the field of controlled release carrier biomaterials. © 2022 by the authors. Licensee MDPI, Basel, Switzerland. 
650 0 4 |a Chitosan 
650 0 4 |a Chlorella 
650 0 4 |a Chlorellum 
650 0 4 |a controlled release 
650 0 4 |a Controlled release 
650 0 4 |a Controlled-release fertilizers 
650 0 4 |a Crosslinking 
650 0 4 |a Eco-friendly 
650 0 4 |a Humic acid 
650 0 4 |a hydrogel 
650 0 4 |a Hydrogel beads 
650 0 4 |a Hydrogels 
650 0 4 |a Mechanical 
650 0 4 |a Mechanical stability 
650 0 4 |a Organic acids 
650 0 4 |a pH sensitivity 
650 0 4 |a PH-responsive 
650 0 4 |a PH-sensitivity 
650 0 4 |a swelling 
650 0 4 |a Water absorption 
650 0 4 |a Water retention 
700 1 |a Bai, B.  |e author 
700 1 |a Cao, F.  |e author 
700 1 |a Li, H.  |e author 
700 1 |a Luo, Y.  |e author 
700 1 |a Wang, J.  |e author 
773 |t Water (Switzerland)