通过逐层组装和阿魏酸交联制备壳聚糖

壳聚糖-海藻酸盐薄膜是通过逐层组装与阿魏酸交联制备的。将它们的机械性能，不透明性和疏水性与通过直接混合，单独交联和单独进行LBL组装而制备的薄膜进行了比较。利用热重分析，X射线衍射，扫描电子显微镜和傅立叶变换红外光谱对薄膜进行表征并分析其形成机理。结果表明，逐层组装和阿魏酸交联的结合提高了薄膜的拉伸强度和阻光能力。另外，该膜具有较低的水蒸气透过率，溶胀度和水溶性，以及较高的疏水性。扫描电子显微镜显示通过组合技术制备的膜的膜组分之间的良好相容性。结构表征结果表明膜中阿魏酸，壳聚糖和海藻酸钠的氨基，羧基和羟基之间存在一些强相互作用。成膜的驱动力是在膜组分之间产生非共价键而不是共价键。

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Chitosan-alginate films were prepared through layer-by-layer assembly combined with ferulic acid crosslinking. Their mechanical properties, opacity, and hydrophobicity were compared to films prepared by direct mixing, crosslinking alone, and LBL assembly alone. Thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and Fourier-transform infrared spectroscopy were used to characterize the films and analyze their formation mechanism. The results indicated that the layer-by-layer assembly and ferulic acid crosslinking combination increased the tensile strength and light-blocking ability of the films. In addition, the films had a lower water vapor transmission rate, swelling degree, and water solubility, as well as higher hydrophobicity. Scanning electron microscopy showed a good compatibility between the film components of the film prepared by the combination technique. The structural characterization results revealed some strong interactions among the amino, carboxyl, and hydroxyl groups of the ferulic acid, chitosan, and sodium alginate in the film. The driving force for film formation was the generation of non-covalent bonds among the film components rather than covalent bonds.