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Updated: Feb 13, 2026

Quantitative 31P NMR Analysis of Lignins and Tannins
Published on: August 2, 2021
Adsorption dynamics of tannin on deacetylated electrospun Konjac glucomannan fabric
Sato Ryosuke1, Gaku Yamaguchi1, Daisuke Nagai1
1Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan. dobashi@gunma-u.ac.jp.
Abstract:
A nonwoven fabric of Konjac glucomannan (KGM) for the adsorption of tannin was fabricated by using electrospinning and then followed by deacetylation with alkaline solution. To analyze the adsorption dynamics of tannin, the time course of the adsorption of tannin on the nonwoven KGM fabric was measured by immersing the fabric in tannin solution at different concentrations of tannin and amounts of the fabric. The initial and late stages of the adsorption behavior could be expressed, respectively, by using a diffusion-limited equation and a stoichiometric equation. A discussion on the dependence of the control parameters on the adsorption behavior is presented. The results represent the first step to provide an effective adsorption procedure for tannin in the use of modified KGM fabric.
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