Surface modified cellulose nanocrystals for tailoring interfacial miscibility and microphase separation of polymer nanocomposites

编号 020019901

推送时间 20190812

研究领域 林产化工 

年份 2019 

类型 期刊 

语种 英语

标题 Surface modified cellulose nanocrystals for tailoring interfacial miscibility and microphase separation of polymer nanocomposites

来源期刊 Cellulose

期 第199期

发表时间 20190329

关键词 Cellulose nanocrystals;  Nanocomposites;  Micro-phase separation;  Miscibility;  Mechanical performance; 

摘要 High performance nanocomposites with good interfacial miscibility and phase separated morphology have received a lot of attention. In this work, cellulose nanocrystals (CNCs) were first grafted with hydrophobic poly(methyl methacrylate) (PMMA) chains to produce modified CNCs (PMCNCs) with increased thermal stability. Such surface-tailored CNCs effectively influenced the phase morphology and improved the mechanical properties of poly(butyl acrylate-co-MMA) (PBA-co-PMMA) nanocomposites. Morphological analysis indicated the presence of microphase separation in PMCNCs/PBA-co-PMMA nanocomposites with PBA as the soft domain and PMMA as well as CNCs as the hard domain. The nanocomposites with 10 wt% PMCNCs/PBA-co-PMMA showed increases in Young’s modulus of more than 20-fold and in tensile strength of about 3-fold compared to those of the unmodified PBA-co-PMMA copolymer. Therefore, the PMCNCs played a crucial role in controlling the interfacial miscibility and tuning the phase morphology of the nanocomposites. It is also essential to understand the role played by microphase separation in achieving nano-scaled morphological control and in fine-tuning the resultant composite properties.

服务人员 尚玮姣

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