研究纤维素纳米晶掺杂淀粉-聚乙烯醇生物纳米复合材料薄膜。
Study of cellulose nanocrystal doped starch-polyvinyl alcohol bionanocomposite films.
机构信息
Department of Food Science and Technology, Toyserkan Faculty of Engineering & Natural Resources, Bu-Ali Sina University, Hamedan, Iran.
Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA.
出版信息
Int J Biol Macromol. 2018 Feb;107(Pt B):2065-2074. doi: 10.1016/j.ijbiomac.2017.10.083. Epub 2017 Oct 16.
We prepared biodegradable nanocomposites from plasticized starch-polyvinyl alcohol (PS-PVA) composite incorporated with cellulose nanocrystals (CNC). The nanocomposite films were characterized by mechanical, thermal, and barrier analyses as well as atomic force microscopy (AFM). The geometrical characteristics of the CNC confirmed that the thickness of CNC was less than 100nm. The generated nanocomposites exhibited an improvement in mechanical and barrier properties. The films showed decrease in solubility, water absorption, water vapor permeability (WVP), and strain at break (SB). However, contact angle, ultimate tensile strength (UTS), glass transition temperature (T) and melting point (T) increased after addition of CNC. The results suggest that as a green reinforcement for elaboration of biodegradable packaging, CNC is a good replacement for mineral reinforcement such as silicates.
我们制备了可生物降解的纳米复合材料，由增塑淀粉-聚乙烯醇（PS-PVA）复合材料与纤维素纳米晶体（CNC）复合而成。通过力学、热学和阻隔分析以及原子力显微镜（AFM）对纳米复合材料薄膜进行了表征。CNC 的几何特征证实了 CNC 的厚度小于 100nm。所制备的纳米复合材料表现出机械和阻隔性能的提高。薄膜的溶解度、吸水率、水蒸气透过率（WVP）和断裂伸长率（SB）降低。然而，加入 CNC 后接触角、极限拉伸强度（UTS）、玻璃化转变温度（T）和熔点（T）增加。结果表明，作为可生物降解包装的绿色增强剂，CNC 是硅酸盐等矿物增强剂的良好替代品。
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