Department of Polymer Science and Technology, Calcutta University, 92 Acharya Prafulla Chandra Road, Kolkata 700 009, India.
Department of Polymer Science and Technology, Calcutta University, 92 Acharya Prafulla Chandra Road, Kolkata 700 009, India.
Carbohydr Polym. 2015 Dec 10;134:240-50. doi: 10.1016/j.carbpol.2015.07.093. Epub 2015 Jul 31.
Semi-interpenetrating polymer network (semi-IPN) of poly(vinyl alcohol)/polyacrylamide was reinforced with various doses of nanocellulose. The different composite films thus prepared were characterized with respect to their mechanical, thermal, morphological and barrier properties. The composite film containing 5 wt.% of nanocellulose showed the highest tensile strength. The semi-interpenetrating polymer network of poly(vinyl alcohol)/polyacrylamide; and its various composites with nanocellulose were almost identical in their thermal stability. Each of the composites however exhibited much superior stability with respect to the linear poly(vinyl alcohol) and crosslinked polyacrylamide. The scanning electron microscopy (SEM) and atomic force microscopy (AFM) studies exhibited phase separated morphology where agglomerates of nanocellulose were found to be dispersed in the matrix of the semi-IPN. The moisture vapor transmission rate (MVTR) was the lowest for the film containing 5 wt.% of nanocellulose.
聚（聚乙烯醇）/聚丙烯酰胺的半互穿聚合物网络（半 IPN）用不同剂量的纳米纤维素进行增强。用这种方法制备的不同复合薄膜的机械、热、形态和阻隔性能都得到了表征。含有 5wt%纳米纤维素的复合膜表现出最高的拉伸强度。聚（聚乙烯醇）/聚丙烯酰胺的半互穿聚合物网络及其与纳米纤维素的各种复合材料在热稳定性方面几乎相同。然而，与线性聚乙烯醇和交联聚丙烯酰胺相比，每一种复合材料都表现出更好的稳定性。扫描电子显微镜（SEM）和原子力显微镜（AFM）研究显示出相分离的形态，其中纳米纤维素的团聚体被发现分散在半 IPN 的基质中。含有 5wt%纳米纤维素的薄膜的水蒸气透过率（MVTR）最低。
