Interface engineering design of compressible and hydrophobic cellulose nanofibril aerogel with porous lamellar structure as highly efficient oil adsorbent

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

Cellulose Pub Date : 2025-01-10 DOI:10.1007/s10570-025-06376-3

Qicheng Bi, Huiwen Pang, Zhiyong Qin, Liuting Mo

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引用次数: 0

Abstract

Nanocellulose aerogels have been considered as attractive sorbents for the remediation of oil spills due to their light weight, sustainability, and abundant pore constructure. However, nanocellulose aerogels integrating high mechanical robustness and efficient oil adsorption properties are still critical challenges. Herein, a highly hydrophobic and compressible oil adsorption aerogel with special porous lamellar structures, containing cellulose nanofibril (CNF) frameworks, SiO₂@polydopamine (PDA) core-shell nanospheres, and hydrophobic modification by octadecyltrimethoxysilane (OTMS) silane long chains, is fabricated through the rapid dopamine (DA) co-deposition and silanization modification interface engineering. The core-shell particles with PDA as the binder and SiO₂ particles as the nano-sized structures were adhesively coated on CNF skeleton to introduce monolayer coatings. The synergistic effect of the SiO₂@PDA core-shell nanospheres and OTMS silane long chains significantly improved stable hydrophobicity and environmental resistance of aerogels in harsh conditions. The unique porous architecture of the aerogel can not only enhance mechanical compressibility but guide the direction of oil and organic pollutants transport. The obtained aerogels showed excellent mechanical properties with a high compressive strength of 1.23 MPa and outstanding oil adsorption performance with a high oil capture capacity of 44.63g/g. This facile strategy holds great promise to develop sustainable, compressible, and effective oil absorbents for highly efficient oil adsorbents.

Graphical abstract

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多孔层状结构可压缩疏水纤维素纳米纤维气凝胶高效吸油剂的界面工程设计

纳米纤维素气凝胶由于其重量轻、可持续性和丰富的孔隙结构而被认为是一种有吸引力的石油泄漏修复吸附剂。然而，集成高机械稳健性和高效吸油性能的纳米纤维素气凝胶仍然是一个严峻的挑战。本文通过快速多巴胺（DA）共沉积和硅烷化改性界面工程，制备了一种具有特殊多孔层状结构的高疏水可压缩油吸附气凝胶，该气凝胶含有纤维素纳米纤维（CNF）框架、SiO2@polydopamine （PDA）核壳纳米球，并由十八烷基三甲氧基硅烷（OTMS）硅烷长链进行疏水改性。将以PDA为粘结剂、SiO2为纳米结构的核壳粒子粘附在CNF骨架上，形成单层涂层。SiO2@PDA核壳纳米球与OTMS硅烷长链的协同作用显著提高了气凝胶在恶劣条件下的稳定疏水性和耐环境性能。独特的多孔结构不仅可以提高气凝胶的机械压缩性，还可以引导油和有机污染物的运移方向。所得气凝胶力学性能优异，抗压强度高达1.23 MPa；吸附油性能优异，捕油能力高达44.63g/g。这种简单的策略为开发可持续的、可压缩的、有效的吸油剂提供了巨大的希望。图形抽象

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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.