Preparation and Characterization of Fucoidan-Chitosan Composite Films

YU Jinghan; XIAO Yingqin; PEN Yuanyuan; BI Xiufang; LIU Yuanyuan

doi:10.19554/j.cnki.1001-3563.2026.17.012

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (17) : 111-119. DOI: 10.19554/j.cnki.1001-3563.2026.17.012

Advanced Materials

Preparation and Characterization of Fucoidan-Chitosan Composite Films

YU Jinghan, XIAO Yingqin, PEN Yuanyuan, BI Xiufang^*, LIU Yuanyuan

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Abstract

To elucidate the effects of fucoidan (FUC) on the structure and properties of chitosan (CS) films, the work aims to prepare composite films by using CS as the film-forming matrix and incorporating different mass fractions of FUC and study the effects of FUC content on the moisture-related properties, mechanical properties, molecular structure, and thermal behavior of the composite films. CS-based composite films incorporated with FUC at three mass fraction levels (25%, 50%, 75%) were fabricated. A series of physical and chemical indicators, including moisture content, solubility, swelling degree and mechanical performance, were systematically measured. Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) were employed to characterize the microstructural features and thermal stability of the films, followed by a correlation analysis among all the tested performance indicators. Appropriate addition of FUC could significantly optimize the comprehensive properties of the composite films. When the FUC content was 75%, the composite film achieved the optimal mechanical properties with significantly improved flexibility. DSC results showed that the thermal stability of the composite film was superior to that of pure FUC film and pure CS film. Correlation analysis indicated that the tensile strength of the composite film was significantly positively correlated with the elongation at break, the swelling rate was moderately positively correlated with the solubility, and both were significantly negatively correlated with the tensile strength and elongation at break, respectively (P < 0.05). FUC modulated the network structure of CS composite films through hydrogen bonding and electrostatic interactions, enhancing their water responsiveness and swelling capacity while reducing tensile strength. These findings provide a theoretical basis for formulation optimization and application-oriented design of CS-FUC composite films.

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fucoidan / chitosan / composite film / polysaccharide

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YU Jinghan, XIAO Yingqin, PEN Yuanyuan, BI Xiufang, LIU Yuanyuan. Preparation and Characterization of Fucoidan-Chitosan Composite Films[J]. Packaging Engineering. 2026, 47(17): 111-119 https://doi.org/10.19554/j.cnki.1001-3563.2026.17.012

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