基于全生物质的琼脂和纤维素纳米晶体强纳米复合纤维及其染料去除应用

IF 2.2 4区 工程技术 Q2 MECHANICS Korea-Australia Rheology Journal Pub Date : 2024-03-27 DOI:10.1007/s13367-024-00089-y
Youngeun Lee, Hyo Jeong Kim, Min Woo Kim, Jin Miyawaki, Han Gi Chae, Youngho Eom
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引用次数: 0

摘要

纤维类商品在塑料废物中占很大比例,对环境造成危害。废弃的卫生口罩和捕鱼设备在降解过程中会产生微纤维塑料,从而对人类健康和生态系统造成显著危害。本研究采用干喷湿纺法制备了机械强度高且环保的纳米复合纤维。这种全生物质纤维由琼脂和纤维素纳米晶体(CNC)分别作为基质和纳米填料,并以去离子水作为共溶剂,具有很高的混溶性。根据流变特性,最佳纺丝浓度和温度分别设定为 13% (w/v) 和 95 °C。与之前报道的琼脂基材料相比,干喷湿纺琼脂基纤维具有显著的机械性能。特别是,与对照琼脂纤维(2.4 GPa、89.2 MPa 和 6.7 MJ m-3)相比,1 wt% CNC(相对于琼脂量)同时将杨氏模量、强度和韧性分别提高了 8.3%、4.8% 和 16.4%(2.6 GPa、93.5 MPa 和 7.8 MJ m-3),克服了传统纳米复合材料系统在刚度-韧性之间的权衡。此外,琼脂/CNC 纳米复合纤维能在 90 分钟内迅速吸附亚甲基蓝,明显快于薄膜型琼脂吸附剂。因此,基于全生物质的琼脂/氯化萘纤维是缓解水污染的一剂良药。
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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All-biomass-based strong nanocomposite fibers of agar and cellulose nanocrystals and their dye removal applications

Fiber-based commodities represent a substantial fraction of plastic waste, leading to environmental harm. Discarded sanitary masks and fishing equipment undergo degradation, generating microfiber plastics, thereby presenting a notable hazard to both human health and the ecosystem. In this study, mechanically strong and environmentally friendly nanocomposite fibers were prepared by dry-jet wet spinning. The all-biomass-based fibers comprised agar and cellulose nanocrystals (CNC) as the matrix and nanofiller, respectively, and were highly miscible in deionized water as a cosolvent. Based on rheological characterization, the optimal spinning concentration and temperature were set to 13% (w/v) and 95 °C, respectively. The dry-jet wet-spun agar-based fibers exhibited remarkable mechanical performance compared with previously reported agar-based materials. In particular, the 1 wt% CNC (with respect to the agar amount) simultaneously improved the Young’s modulus, strength, and toughness by 8.3, 4.8, and 16.4% (2.6 GPa, 93.5 MPa, and 7.8 MJ m−3), respectively, compared to those of the control agar fibers (2.4 GPa, 89.2 MPa, and 6.7 MJ m−3), overcoming the trade-off of stiffness-toughness for conventional nanocomposite systems. In addition, the agar/CNC nanocomposite fibers rapidly adsorbed Methylene blue within 90 min, which is significantly faster than that of the film-type agar adsorbent. Therefore, all-biomass-based agar/CNC fibers are a promising remedy for alleviating water pollution.

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来源期刊
Korea-Australia Rheology Journal
Korea-Australia Rheology Journal 工程技术-高分子科学
CiteScore
2.80
自引率
0.00%
发文量
28
审稿时长
>12 weeks
期刊介绍: The Korea-Australia Rheology Journal is devoted to fundamental and applied research with immediate or potential value in rheology, covering the science of the deformation and flow of materials. Emphases are placed on experimental and numerical advances in the areas of complex fluids. The journal offers insight into characterization and understanding of technologically important materials with a wide range of practical applications.
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