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An analysis on the electrophoretic mobility of cellulose nanocrystals as thin cylinders: relaxation and end effect
名前 / ファイル | ライセンス | Actions | |
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item type | Journal Article(1) | |||||||||||||||||
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公開日 | 2020-09-14 | |||||||||||||||||
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言語 | en | |||||||||||||||||
タイトル | An analysis on the electrophoretic mobility of cellulose nanocrystals as thin cylinders: relaxation and end effect | |||||||||||||||||
言語 | ||||||||||||||||||
言語 | eng | |||||||||||||||||
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タイプ | journal article | |||||||||||||||||
著者 |
小林, 幹佳
× 小林, 幹佳
WEKO
106753
× 江前, 敏晴
WEKO
120184
× Lin, Kuan-Hsuan× Hu, Donghao× Sugimoto, Takuya× Chang, Feng-Cheng |
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抄録 | ||||||||||||||||||
内容記述 | Cellulose nanocrystals (CNCs) are extracted from cellulosic fibers via sulfuric acid hydrolysis and found to exhibit unique properties due to their nanoscale, ordered structure, and surface morphology. The dispersion stability of a CNC suspension is a significant factor when CNCs are applied for reinforcement of a composite or ink jet printing. Since sulfuric acid hydrolysis introduces sulfate groups on CNC surfaces, we considered that charging conditions needed to be characterized, typically based on electrophoretic mobility. After the electrophoretic mobility was measured, several theoretical equations were applied to fit those values to assume the proper CNC particle shape. While Smoluchowski's equation is often used for this purpose, its applicability to CNCs should be reconsidered due to the thin, rod-like shape of CNCs with a finite length and high charge density. In this sense, we measured the surface charge and electrophoretic mobility of well-characterized CNCs. The obtained experimental data have been analyzed by using various electrokinetic equations. Our analytical results suggested that Smoluchowski's equation and the Ohshima–Henry equation overestimated the magnitude of the mobility of CNCs because it ignores the double layer relaxation and end effect. They also suggested that neither the Ohshima–Overbeek averaged equation nor the Ohshima–Overbeek perpendicular equation described the mobility of CNCs appropriately because those equations consider the double layer relaxation and end effect of a cylinder in a limited manner. Instead, the modified Ohshima–Overbeek equation was presented to be preferred for such a charged cylinder with a small aspect ratio. | |||||||||||||||||
書誌情報 |
en : RSC Advances 巻 9, 号 58, p. 34032-34038, 発行日 2019-10 |
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収録物識別子 | 2046-2069 | |||||||||||||||||
DOI | ||||||||||||||||||
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関連識別子 | 10.1039/C9RA05156B | |||||||||||||||||
権利 | ||||||||||||||||||
権利情報 | Open Access Article. Published on 22 October 2019. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. | |||||||||||||||||
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値 | publisher | |||||||||||||||||
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出版者 | The Royal Society of Chemistry |