Sustainable production of cellulose nanofibers aerogels with high purity from sorghum bagasse waste for oil/water separation

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2025-04-30 DOI:10.1007/s10570-025-06534-7

Hongli Guo, Yong Liu, Xinghua Zhang, Qi Zhang, Jianguo Liu, Longlong Ma, Lungang Chen

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引用次数: 0

Abstract

Aerogels, recognized for their 3D porous structure and high porosity, hold significant potential for oil–water separation. So many preparations of aerogels have been widely reported. It is still challenging to prepare high porosity efficiently and cost-effectively. This study presents a green, simple, and efficient approach to aerogel production, using cellulose and cellulose nanofibers from sorghum bagasse waste as the framework, with polyvinyl alcohol as the crosslinking agent, lead formation of hydrogen bonds to form a stable three-dimensional network structure. Ultrasonic treatment significantly enhanced their aspect ratio. The resulting aerogel features a low density (< 6.3 kg/m³) and high porosity (> 99.4%). After hydrophobic modification with methyltrimethoxysilane through chemical vapor deposition, the aerogel achieves excellent hydrophobic properties, with a water contact angle of 146°. It demonstrates strong absorption capabilities for oil and organic solvents, with an oil absorption capacity of 89 g/g. Importantly, the aerogel retains its high absorption capacity after ten cycles, highlighting its excellent reusability. In conclusion, this aerogel represents a promising solution for valorizing Sorghum bagasse (BG) waste and shows significant potential in oil–water separation applications.

Graphical abstract

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以高粱甘蔗渣为原料可持续生产高纯度纤维素纳米纤维气凝胶，用于油水分离

气凝胶以其三维多孔结构和高孔隙度而闻名，在油水分离方面具有巨大的潜力。因此，许多气凝胶的制备方法已被广泛报道。如何高效、经济地制备高孔隙度的材料仍然是一个挑战。本研究提出了一种绿色、简单、高效的气凝胶生产方法，以高粱甘蔗渣中的纤维素和纤维素纳米纤维为骨架，聚乙烯醇为交联剂，通过诱导形成氢键形成稳定的三维网络结构。超声处理显著提高了它们的纵横比。所得气凝胶具有低密度（6.3 kg/m3）和高孔隙率（99.4%）的特点。经化学气相沉积对甲基三甲氧基硅烷进行疏水改性后，气凝胶具有优异的疏水性能，水接触角为146°。对油脂和有机溶剂有较强的吸附能力，吸油量为89 g/g。重要的是，气凝胶在10次循环后仍保持其高吸收能力，突出了其良好的可重复使用性。总之，这种气凝胶代表了一种很有前途的解决方案，用于高粱甘蔗渣（BG）废物的增值，并在油水分离方面显示出巨大的应用潜力。图形抽象

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

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.