材料科学
复合材料
纳米纤维
嫁接
纳米复合材料
纤维素
韧性
表面改性
聚合物
热稳定性
模数
杨氏模量
化学工程
工程类
作者
Sikai Chen,Qing-Yang Feng,Dong Li,Fei Song,Xiu-Li Wang,Yu‐Zhong Wang
出处
期刊:ACS applied polymer materials
[American Chemical Society]
日期:2023-05-11
卷期号:5 (6): 4316-4326
标识
DOI:10.1021/acsapm.3c00476
摘要
This investigation explores the relationships between the structure and properties of surface-grafted cellulose nanofiber (CNF)-based one-component composites. Critical parameters, including graft density, graft chain length, and interface structure, were systematically modified. Increasing the graft density and hydrophobic modification of the CNF surface significantly improved the thermal stability. Reducing the graft chain length increased the Tg of the graft chain. The hydrophobic modification of the CNF surface decreased the Tg of the graft chains, while increasing the graft chain length resulted in a reduction in the stiffness. Conversely, decreasing the graft density led to a remarkable enhancement in the toughness and strength of the nanocomposites. The hydrophobically modified nanocomposites exhibited a decrease in modulus and an increase in elasticity. These results highlight the significant role of interfacial interaction between CNF and the grafted polymer, which is equally crucial as the graft density in determining the properties of these composites.
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