期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 3, 期 4, 页码 574-582出版社
AMER CHEMICAL SOC
DOI: 10.1021/sc500792c
关键词
Cellulose nanoaystals; poly(vinylidene fluoride); sustainability; reinforcement; hydrophilic modification
资金
- Economic Development Assistantship Program at Louisianan State University
- Key Biomass Energy Laboratory of Henan Province, China
The aim of this study is to use cellulose nanocrystals (CNCs) as a sustainable additive for improving hydrophilicity, mechanical and thermal properties of poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate).% (PMMA) blends. A casting-evaporation method was used to prepare the nanocomposites, and their surface wettability, mechanical, thermal and morphological properties were characterized. With the addition of only 3 wt% CNCs, tensile strength, tensile modulus, dynamic storage modulus at 45 degrees C, and onset thermal decomposition temperature of the ternary composite exhibited 32%, 70%, 36% and 4.0 degrees C increase, respectively, while the static water angle decreased by 6. As the CNC content increased to 6 wt %, further improvement was observed in all above properties except tensile strength. The observed performance enhancement is attributed to a considerably increased crystallinity of PVDF (e.g., from 28.5% for the binary blend to 43.3% for ternary composite at the 3 wt % CNC level). Our present work demonstrates the importance of using sustainable CNCs to achieve synergetic improvement in physical and mechanical performance of PVDF/PMMA blend, suggesting a facile way to prepare nanocomposites for potential membrane-based separation applications.
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