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Updated: Jan 29, 2026
Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release
Published on: July 4, 2017
Green pH/magnetic sensitive hydrogels based on pineapple peel cellulose and polyvinyl alcohol: synthesis,
Hongjie Dai1, Huan Zhang2, Liang Ma2
1College of Food Science, Southwest University, Chongqing 400715, China; School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing 400715, China.
Abstract:
This study develops a green method to fabricate pH/magnetic sensitive hydrogels based on pineapple peel carboxymethyl cellulose (PCMC), regenerated nanocellulose (rPPNc), and polyvinyl alcohol (PVA), accompanied by in situ incorporation of Fe3O4. The rPPNc was obtained through a two-stage method involving ionic liquid swelling followed by dilute sulfuric acid hydrolysis. The SEM images revealed the porous structure of the hydrogels. The hydrogels showed a magnetic responsive behavior due to incorporation of Fe3O4, and an enhanced thermal stability at high temperature due to incorporations of rPPNc and Fe3O4. The hydrogels displayed a pH-dependent swelling behavior and swelled more due to incorporation of rPPNc. In addition, rPPNc enhanced the naringin loading and entrapment efficiency of the hydrogels, showing an optimum value at 2% addition. The naringin can be gradually released from the hydrogels, which followed Fickian diffusion model. In summary, this work provided a relatively green approach for producing nanocellulose. The prepared hydrogels can be served as promising candidate materials for drug delivery system due to the characteristics of biocompatibility, pH and magnetic sensitivity.
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