Thermal characteristics of polyethylene oxide and functionalized bacterial cellulose whisker nanoparticle composite nanofibers

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• 作者：Ok Ja Yoon
• 关键词：bacterial cellulose whisker nanoparticles ; nitrogen plasma treatment ; polyethylene oxide ; composite nanofibers ; thermal characteristics
• 刊名：Macromolecular Research
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：24
• 期：11
• 页码：973-979
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences; Soft and Granular Matter, Complex Fluids and Microfluidics; Physical Chemistry; Characterization and Evaluation of Materials; Nanochemistry; Nanotechnology;
• 出版者：The Polymer Society of Korea
• ISSN：2092-7673
• 卷排序：24

文摘

Composite nanofibers of polyethylene oxide (PEO)/bacterial cellulose whisker nanoparticles (BCW NPs) and PEO/functionalized bacterial cellulose whisker nanoparticles (f-BCW NPs) were fabricated by an electrospinning process. BCW NPs were prepared using a blender in order to increase the filler density in composite nanofibers. Nitrogen functionalization of the f-BCW NPs was performed by plasma treatment using a microwave oven. The chemical bonding between the nitrogen functional groups of f-BCW NPs and the hydroxyl groups of the polymer chains in the PEO matrix was enhanced by the nitrogen functionalization. The average diameter of the PEO/f-BCW NP composite nanofibers was slightly larger than that of PEO nanofibers and PEO/BCW NP composite nanofibers at the same concentration. The melting temperature (T_m), crystallization temperature (T_c), and weight loss of PEO/f-BCW NP composite nanofibers decreased compared to those of the PEO nanofibers and PEO/BCW NP composite nanofibers. This was a result of the f-BCW NPs hindering the crystallization of the PEO nanofiber structures. The strong interfacial interactions between the f-BCW NP nanofillers and the polymer matrix increased the glass transition temperature (T_g) compared to PEO nanofibers and PEO/BCW NP composite nanofibers. These results demonstrated that N₂ plasma treatment of BCW NPs embedded in PEO nanofiber was a useful tool for improving their thermal characteristics for biological applications.