Nanostructured Materials Laboratory, University of Georgia, Athens, GA 30602, USA.
Department of Textiles, Merchandising and Interiors, the University of Georgia, Athens, GA 30602, USA.
Molecules. 2020 Jul 16;25(14):3238. doi: 10.3390/molecules25143238.
Renewable nanocellulose materials received increased attention owing to their small dimensions, high specific surface area, high mechanical characteristics, biocompatibility, and compostability. Nanocellulose coatings are among many interesting applications of these materials to functionalize different by composition and structure surfaces, including plastics, polymer coatings, and textiles with broader applications from food packaging to smart textiles. Variations in porosity and thickness of nanocellulose coatings are used to adjust a load of functional molecules and particles into the coatings, their permeability, and filtration properties. Mechanical stability of nanocellulose coatings in a wet and dry state are critical characteristics for many applications. In this work, nanofibrillated and nanocrystalline cellulose coatings deposited on the surface of polymer films and textiles made of cellulose, polyester, and nylon are studied using atomic force microscopy, ellipsometry, and T-peel adhesion tests. Methods to improve coatings' adhesion and stability using physical and chemical cross-linking with added polymers and polycarboxylic acids are analyzed in this study. The paper reports on the effect of the substrate structure and ability of nanocellulose particles to intercalate into the substrate on the coating adhesion.
可再生纳米纤维素材料因其尺寸小、比表面积大、机械性能高、生物相容性和可堆肥性而受到越来越多的关注。纳米纤维素涂层是这些材料的许多有趣应用之一，可用于对不同组成和结构的表面进行功能化，包括塑料、聚合物涂层和纺织品，其应用范围从食品包装到智能纺织品。纳米纤维素涂层的孔隙率和厚度的变化可用于调节涂层中的功能分子和颗粒的负载、其渗透性和过滤性能。纳米纤维素涂层在干湿状态下的机械稳定性是许多应用的关键特性。在这项工作中，使用原子力显微镜、椭圆偏振法和 T 剥离附着力测试研究了沉积在聚合物薄膜和纤维素、聚酯和尼龙制成的纺织品表面上的纳米原纤维和纳米纤维素晶体涂层。本研究分析了使用添加的聚合物和多羧酸进行物理和化学交联来提高涂层附着力和稳定性的方法。本文报告了基底结构和纳米纤维素颗粒插入基底的能力对涂层附着力的影响。
