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Fabrication of Ionic Cellulose Nanofiber Composites by Electrospinning Cellulose Microfibril-Gel-Dispersions in Poly(vinyl Alcohol) Solution
Journal of Natural Fibers ( IF 3.5 ) Pub Date : 2021-01-16 , DOI: 10.1080/15440478.2020.1870634
Eiichi Shoji 1 , Yusuke Hikida 1 , Masanori Hatashita 2
Affiliation  

ABSTRACT

In this study, we propose a fabrication method to obtain composites of poly(vinyl alcohol) (PVA)/ionic cellulose nanofibers, in which a fiber structure is manipulated through a reconstruction of 2,2,6,6-tetramethyl-piperidinyl-1-oxyl radical (TEMPO)-oxidized cellulose nanofiber (TCNF) or the carboxymethyl cellulose nanofiber (CMCNF) heterogeneous microfibril gels using electrospinning method. The key concept is to assemble nanofibers from thin few-nanometer-scale width cellulose nanofibers (microfibrils) to thicker several-hundred-nanometer-scale width cellulose nanofibers by electrospinning insoluble microfibril-gel-dispersion in PVA solution. In the case of CMCNF, nanofibers with less-fused structures were successfully reconstructed via electrospinning. Energy-dispersive X-ray spectroscopy revealed that sodium ions exist in the fibers, where they function as counter ions of carboxylate groups of polyelectrolyte moiety of CMCNF. Thus, the obtained composites do contain both ionic cellulose nanofibers and PVA. The proposed fabrication route can be used to fabricate composites as nonwoven fabrics of polyelectrolyte nanofibers. These natural polymer based ionic fabrics will be widely useful to propose low-environmental-impact polymer actuators and active sensing elements involving the ion transport phenomena.



中文翻译:

静电纺丝聚乙烯醇溶液中的纤维素微纤维-凝胶分散体制备离子纤维素纳米纤维复合材料

摘要

在这项研究中,我们提出了一种制备聚乙烯醇(PVA)/离子纤维素纳米纤维复合材料的制造方法,其中通过重建2,2,6,6-四甲基哌啶基-1来操纵纤维结构使用静电纺丝法将-氧自由基(TEMPO)氧化的纤维素纳米纤维(TCNF)或羧甲基纤维素纳米纤维(CMCNF)异质微原纤维凝胶化。关键概念是通过将不溶性微纤维凝胶分散体在PVA溶液中进行静电纺丝,将纳米纤维组装而成,从稀薄的几纳米尺度宽度的纤维素纳米纤维(微纤维)到较厚的几百纳米尺度宽度的纤维素纳米纤维。在CMCNF的情况下,通过电纺成功地重建了具有较少融合结构的纳米纤维。能量色散X射线光谱表明,纤维中存在钠离子,它们充当CMCNF的聚电解质部分的羧酸根基团的抗衡离子。因此,获得的复合材料确实包含离子纤维素纳米纤维和PVA。所提出的制造路线可用于制造复合材料作为聚电解质纳米纤维的非织造织物。这些基于天然聚合物的离子织物将广泛用于提出涉及离子迁移现象的低环境影响聚合物致动器和有源传感元件。

更新日期:2021-01-18
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