Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1-2, Moscow, 119991, Russian Federation.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, Moscow, 119991, Russian Federation.
Carbohydr Polym. 2021 Apr 15;258:117614. doi: 10.1016/j.carbpol.2021.117614. Epub 2021 Jan 19.
The functionalization of the bacterial cellulose (BC) surface with a chitosan biopolymer to expand the areas of possible applications of the modified BC is an important scientific task. The creation of such composites in the carbonic acid solutions that were performed in this work has several advantages in terms of being biocompatible and eco-friendly. Quantitative analysis of chitosan content in the composite was conducted by tritium-labeled chitosan radioactivity detection method and this showed three times increased chitosan loading. Different physicochemical methods showed successful incorporation of chitosan into the BC matrix and interaction with it through hydrogen bonds. Microscopy results showed that the chitosan coating with a thickness of around 10 nm was formed in the bulk of BC, covering each microfibril. It was found that the inner specific surface area increased 1.5 times on deposition of chitosan from the solutions in carbonic acid.
将壳聚糖生物聚合物功能化到细菌纤维素 (BC) 表面，以扩大改性 BC 的可能应用领域，是一项重要的科学任务。在本工作中进行的碳酸溶液中创建此类复合材料具有生物相容性和环保的优势。通过氚标记壳聚糖放射性检测方法对复合材料中的壳聚糖含量进行定量分析，表明壳聚糖的负载量增加了三倍。不同的物理化学方法表明壳聚糖成功地掺入到 BC 基质中，并通过氢键与其相互作用。显微镜结果表明，在 BC 本体中形成了约 10nm 厚的壳聚糖涂层，覆盖每个微纤维。结果发现，在碳酸溶液中沉积壳聚糖后，内比表面积增加了 1.5 倍。
