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Open AccessArticle

Preparation and pH Controlled Release of Fe3O4/Anthocyanin Magnetic Biocomposites

by Xizhi Jiang 1,2,3, Qingbao Guan 4, Min Feng 2,3, Mengyang Wang 2,3, Nina Yan 2,3, Min Wang 2,3, Lei Xu 2,3,* and Zhongzheng Gui 1,*
School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018, China
Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
Authors to whom correspondence should be addressed.
Polymers 2019, 11(12), 2077;
Received: 14 November 2019 / Revised: 10 December 2019 / Accepted: 10 December 2019 / Published: 12 December 2019
(This article belongs to the Special Issue Biopolymer Modifications and Characterization)
Anthocyanins are a class of antioxidants extracted from plants, with a variety of biochemical and pharmacological properties. However, the wide and effective applications of anthocyanins have been limited by their relatively low stability and bioavailability. In order to expand the application of anthocyanins, Fe3O4/anthocyanin magnetic biocomposite was fabricated for the storage and release of anthocyanin in this work. The magnetic biocomposite of Fe3O4 magnetic nanoparticle-loaded anthocyanin was prepared through physical intermolecular adsorption or covalent cross-linking. Scanning electron microscopy (SEM), Dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD) and thermal analysis were used to characterize the biocomposite. In addition, the anthocyanin releasing experiments were performed. The optimized condition for the Fe3O4/anthocyanin magnetic biocomposite preparation was determined to be at 60 °C for 20 h in weak alkaline solution. The smooth surface of biocomposite from SEM suggested that anthocyanin was coated on the surface of the Fe3O4 particles successfully. The average size of the Fe3O4/anthocyanin magnetic biocomposite was about 222 nm. Under acidic conditions, the magnetic biocomposite solids could be repeatable released anthocyanin, with the same chemical structure as the anthocyanin before compounding. Therefore, anthocyanin can be effectively adsorbed and released by this magnetic biocomposite. Overall, this work shows that Fe3O4/anthocyanin magnetic biocomposite has great potential for future applications as a drug storage and delivery nanoplatform that is adaptable to medical, food and sensing. View Full-Text
Keywords: magnetic biocomposite; anthocyanin; Fe3O4; storage; release magnetic biocomposite; anthocyanin; Fe3O4; storage; release
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MDPI and ACS Style

Jiang, X.; Guan, Q.; Feng, M.; Wang, M.; Yan, N.; Wang, M.; Xu, L.; Gui, Z. Preparation and pH Controlled Release of Fe3O4/Anthocyanin Magnetic Biocomposites. Polymers 2019, 11, 2077.

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