Green Nanocomposites Based on Functionalized Cellulose Nanocrystals: A Study on the Relationship between Interfacial Interaction and Property Enhancement
Green Nanocomposites Based on Functionalized Cellulose Nanocrystals: A Study on the Relationship between Interfacial Interaction and Property Enhancement
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DOI：
10.1021/sc400499g
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发表时间：
2014-01
影响因子：
8.4
通讯作者：
Houyong Yu;Z. Qin;Che Yan;Juming Yao
中科院分区：
文献类型：
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作者：
Houyong Yu;Z. Qin;Che Yan;Juming Yao
通过将聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV）接枝到纤维素纳米晶体（CNC）上合成功能化纤维素纳米晶体（PHCN）。所得高负载量的 PHCN 均匀分散到 PHBV 基质中，产生完全可生物降解的纳米复合材料，表现出优异的机械性能和热稳定性。与纯 PHBV 相比，含有 20 wt% PHCN 的纳米复合材料的拉伸强度、杨氏模量和断裂伸长率分别提高了 113%、95% 和 17%。同时，初始分解温度（T0）、5%失重温度（T5%）、最高分解温度（Tmax）和完全分解温度（Tf）分别提高了29.6、23.9、34.7和37.0℃。这种改进主要归因于 PHCN 的均匀分散以及由于链缠结、共结晶和氢键相互作用而在填料和基体之间产生强大的界面粘附力。更多...
Functionalized cellulose nanocrystals (PHCNs) were synthesized by grafting poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) onto cellulose nanocrystals (CNCs). The resultant PHCNs with high loading levels were uniformly dispersed into a PHBV matrix to produce fully biodegradable nanocomposites, which showed superior mechanical performance and thermal stability. Compared with those of neat PHBV, the tensile strength, Young’s modulus, and elongation at break of the nanocomposites with 20 wt % PHCNs were enhanced by 113%, 95%, and 17%, respectively. Meanwhile, the initial decomposition temperature (T0), temperature at 5% weight loss (T5%), maximum decomposition temperature (Tmax), and complete decomposition temperature (Tf) increased by 29.6, 23.9, 34.7, and 37.0 °C, respectively. This improvement was primarily ascribed to uniform dispersion of the PHCNs and to strong interfacial adhesion between filler and matrix due to the chain entanglements, cocrystallization, and hydrogen bonding interactions. Moreov...