Creep behavior of starch-based nanocomposite films with cellulose nanofibrils

被引：50
|
作者：
Li, Meng [1 ]
Li, Dong [1 ]
Wang, Li-jun [2 ]
Adhikari, Benu [3 ]
机构：
[1] China Agr Univ, Coll Engn, Natl Energy R&D Ctr Nonfood Biomass, Beijing 100083, Peoples R China
[2] China Agr Univ, Coll Food Sci & Nutr Engn, Beijing Key Lab Funct Food Plant Resources, Beijing 100083, Peoples R China
[3] RMIT Univ, Sch Appl Sci, Melbourne, Vic 3001, Australia
来源：
CARBOHYDRATE POLYMERS | 2015年 / 117卷
关键词：
Cellulose nanofibrils; Composite films; Frequency sweep; Creep behavior; Time-temperature superposition (TTS); PLASTICIZED STARCH; MECHANICAL-PROPERTIES; BARRIER PROPERTIES; BIOCOMPOSITES; WHISKERS; FIBERS; COMPOSITES; RESISTANCE;
D O I：
10.1016/j.carbpol.2014.10.023
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Nanocomposite films were successfully prepared by incorporating cellulose nanofibrils (CNFs) from sugar beet pulp into plasticized starch (PS) at CNFs concentration of 5-20%. The storage (G') and loss (G '') moduli, creep and creep-recovery behavior of these films were studied. The creep behavior of these films at long time frame was studied using time-temperature superposition (IFS). The CNFs were uniformly distributed within these films up to 15% of CNFs. The PS-only and the PS/CNFs nanocomposite films exhibited dominant elastic behavior. The incorporation of CNFs increased both the G' and G ''. The CNFs improved the creep resistance and reduced the creep recovery rate of the PS/CNFs nanocomposite films. IFS method was successfully used to predict the creep behavior of these films at longer time frame. Power law and Burgers model were capable (R-2 >0.98) of fitting experimental G' versus angular frequency and creep strain versus time data, respectively. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：957 / 963
页数：7
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