Anisotropic Biomass Aerogels with Enhanced Mechanical, Flame Retardancy, Smoke Suppression, and Antibacterial Performances for Thermal Insulation

IF 7.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering Pub Date : 2025-05-28 DOI:10.1021/acssuschemeng.5c03336

Xinyu An, Chang Ma, Rui Wang, Ling Gong, Chang Liu, Xue-Ying Lu, Zhiming Liu, Xu Li

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Abstract

Biomass aerogels are expected to become thermal insulation materials to overcome the world environment and energy crisis due to their excellent ecological friendliness and thermal insulation performances. In this paper, thermal insulation biomass aerogels were designed based on ionic and physical double cross-linking strategies and directed freezing methods using pectin (P), gelatin (G), and phytic acid (PA) as raw materials. They exhibited remarkable anisotropic structural characteristics, achieving excellent mechanical and thermal insulation performances (thermal conductivities reached 18.95 and 13.40 mW/mK) in different directions. Due to the presence of gelatin and phytic acid, aerogels showed excellent flame retardancy, smoke suppression, and antibacterial performances (antibacterial rates against Staphylococcus aureus and Escherichia coli reached 41.33 and 82.29%, respectively). Furthermore, the coating-modified aerogels showed amazing surface waterproof performance (hydrophobic angle increased to 110°). This study provided a new idea for the preparation of thermal insulation materials with excellent mechanical, flame retardancy, smoke suppression, antibacterial, and surface waterproof performances.

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具有增强机械、阻燃、抑烟和抗菌保温性能的各向异性生物质气凝胶

生物质气凝胶具有良好的生态友好性和保温性能，有望成为克服世界环境和能源危机的保温材料。本文以果胶(P)、明胶(G)和植酸（PA）为原料，基于离子和物理双交联策略和定向冷冻方法，设计了保温生物质气凝胶。它们具有显著的各向异性结构特征，在不同方向上均具有优异的力学和保温性能（导热系数分别达到18.95和13.40 mW/mK）。由于明胶和植酸的存在，气凝胶表现出优异的阻燃、抑烟和抗菌性能（对金黄色葡萄球菌和大肠杆菌的抑菌率分别达到41.33%和82.29%）。此外，涂层修饰的气凝胶具有优异的表面防水性能（疏水角增加到110°）。本研究为制备具有优异力学、阻燃、抑烟、抗菌和表面防水性能的保温材料提供了新的思路。

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

ACS Sustainable Chemistry & Engineering CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

13.80

自引率

4.80%

发文量

1470

审稿时长

1.7 months

期刊介绍： ACS Sustainable Chemistry & Engineering is a prestigious weekly peer-reviewed scientific journal published by the American Chemical Society. Dedicated to advancing the principles of green chemistry and green engineering, it covers a wide array of research topics including green chemistry, green engineering, biomass, alternative energy, and life cycle assessment. The journal welcomes submissions in various formats, including Letters, Articles, Features, and Perspectives (Reviews), that address the challenges of sustainability in the chemical enterprise and contribute to the advancement of sustainable practices. Join us in shaping the future of sustainable chemistry and engineering.