Reinforced tensile strength and wettability of nanofibrous electrospun cellulose acetate by coating with waterborne polyurethane and graphene oxide

IF 2.2 4区工程技术 Q1 MATERIALS SCIENCE, TEXTILES

Journal of Engineered Fibers and Fabrics Pub Date : 2022-01-01 DOI:10.1177/15589250221127353

H. Kim, So-Hyun Park

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引用次数: 2

Abstract

Nanotechnology has made biocompatible nanofibers grow in the healthcare industry. Herein, a cellulose acetate (CA) electrospun membrane was characterized by nanofibers of 438 (nm) in diameter between virus and bacteria, pore areas of 36.3%, and a pore size of 395 ± 263 (nm). This structure led to excellent air-water transfer through pore connectivity, contributing to sufficient wettability, air permeability, and water vapor transmission rate (WVTR). The air permeability of pristine CA membranes became predictable through multiple linear regression, based on the correlation to thickness, bulk density (Pearson’s coefficients: 0.754, −0.538). Nonetheless, the tensile strength of the pristine CA needed to be reinforced by spray coating with waterborne polyurethane (WPU) and graphene oxide (GO). The WPU/GO 6:1 (v/v) ratio was optimal due to the increase in ultimate tensile stress to 132.96% due to a synergy of GO’s covalent bonds with WPU’s hard segments and elongation at break to 113.40% from WPU polyols. The WPU/GO 6:1 coated CA membrane possessed still comparable air permeability (36.53 l/m2/s), and WVTR (5736 g/m2/day). Its rapid wetting transition from the Cassie-Baxter’s to Wenzel’s state was attributed to GO’s hydrophilic functional groups. These achievements in reinforcement of tensile strength and wettability would pave the way for filtration, and wound dressing. Visual abstract

查看原文本刊更多论文

水性聚氨酯和氧化石墨烯涂层增强纳米纤维静电纺醋酸纤维素的抗拉强度和润湿性

纳米技术使生物相容性纳米纤维在医疗保健行业得到发展。本文中，醋酸纤维素（CA）电纺膜的特征在于病毒和细菌之间直径为438（nm）的纳米纤维，孔面积为36.3%，孔径为395 ± 263（nm）。这种结构通过孔隙连通性导致了优异的空气-水转移，有助于充分的润湿性、透气性和水蒸气透过率（WVTR）。基于与厚度、体积密度（Pearson系数：0.754，−0.538）的相关性，通过多元线性回归可以预测原始CA膜的透气性。尽管如此，原始CA的拉伸强度需要通过水性聚氨酯（WPU）和氧化石墨烯（GO）的喷涂来增强。由于GO的共价键与WPU的硬链段的协同作用以及WPU多元醇的断裂伸长率达到113.40%，最终拉伸应力增加到132.96%，因此WPU/GO 6:1（v/v）比是最佳的。WPU/GO 6:1涂层的CA膜仍具有相当的透气性（36.53 l/m2/s）和WVTR（5736 g/m2/天）。其从Cassie-Baxter状态到Wenzel状态的快速润湿转变归因于GO的亲水官能团。这些在增强抗拉强度和润湿性方面的成就将为过滤和伤口敷料铺平道路。视觉摘要

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Engineered Fibers and Fabrics 工程技术-材料科学：纺织

CiteScore

5.00

自引率

6.90%

发文量

审稿时长

4 months

期刊介绍： Journal of Engineered Fibers and Fabrics is a peer-reviewed, open access journal which aims to facilitate the rapid and wide dissemination of research in the engineering of textiles, clothing and fiber based structures.