Wu Shufang, Chen Xunjun, Yi Minghao, Ge Jianfang, Yin Guoqiang, Li Xinming, He Ming
Green Chemical Engineering Institute, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
Guangzhou Key Laboratory for Efficient Utilization of Agricultural Chemicals, Guangzhou 510225, China.
Nanomaterials (Basel). 2019 Feb 20;9(2):298. doi: 10.3390/nano9020298.
In this study, feather keratin/polyvinyl alcohol/tris(hydroxymethyl)aminomethane (FK/PVA/Tris) bionanocomposite films containing two types of nanoparticles, namely one-dimensional sodium montmorillonite (MMT) clay platelets (0.5, 1, 3, and 5 wt%) and three-dimensional TiO₂ nanospheres (0.5, 1, 3, and 5 wt%), are prepared using solvent casting method. X-ray diffraction studies confirm the completely exfoliated structure of FK/PVA/Tris/MMT nanocomposites. The successful formation of new hydrogen bonds between the hydroxyl groups of the film matrix and the nanofillers is confirmed by Fourier transform infrared spectroscopy. The tensile strength, elongation at break, and initial degradation temperature of the films are enhanced after MMT and TiO₂ incorporation. The water vapor permeability, oxygen permeability, and light transmittance decrease with increase in TiO₂ and MMT contents. In summary, nanoblending is an effective method to promote the application of FK/PVA/Tris blend films in the packaging field.
在本研究中，采用溶液浇铸法制备了含有两种类型纳米粒子的羽毛角蛋白/聚乙烯醇/三（羟甲基）氨基甲烷（FK/PVA/Tris）生物纳米复合薄膜，即一维钠蒙脱石（MMT）粘土片层（0.5、1、3和5 wt%）和三维TiO₂纳米球（0.5、1、3和5 wt%）。X射线衍射研究证实了FK/PVA/Tris/MMT纳米复合材料的完全剥离结构。傅里叶变换红外光谱证实了薄膜基体的羟基与纳米填料之间成功形成了新的氢键。加入MMT和TiO₂后，薄膜的拉伸强度、断裂伸长率和初始降解温度均有所提高。随着TiO₂和MMT含量的增加，水蒸气透过率、氧气透过率和透光率降低。总之，纳米共混是促进FK/PVA/Tris共混薄膜在包装领域应用的有效方法。
