章自妍,康健聪,李晓云.微纤化纤维素/玻璃纤维气凝胶的空气过滤性能研究[J].中国造纸,2026,45(3):69-76 本文二维码信息
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微纤化纤维素/玻璃纤维气凝胶的空气过滤性能研究
Study on Air Filtration Performance of Microfibrillated Cellulose/Glass Fiber Aerogels
收稿日期：2025-10-09  修订日期：2025-11-04
DOI：10.11980/j.issn.0254-508X.2026.03.008
关键词:  空气过滤  气凝胶  玻璃纤维  微纤化纤维素
Key Words:air filtration  aerogels  glass fiber  microfibrillated cellulose
基金项目:
作者单位邮编
章自妍* 华南理工大学轻工科学与工程学院,广东广州,510640 510640
康健聪 华南理工大学轻工科学与工程学院,广东广州,510640 510640
李晓云* 华南理工大学轻工科学与工程学院,广东广州,510640 510640
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摘要:针对传统空气过滤材料达到高过滤效率时伴随的高气流阻力等问题，本研究以玻璃纤维（GF）为基体，引入微纤化纤维素（MFC）构建具有三维网络结构的MFC/GF气凝胶，并采用甲基三甲氧基硅烷（MTMS）进行硅烷化改性，通过冷冻干燥技术，制备了硅烷改性气凝胶（GMM），研究了MFC和MTMS添加量对GMM微观结构、过滤性能、力学性能和疏水性的影响。结果表明，在GF基础上，添加0.1% MFC（相对于GF绝干质量）可以使MFC/GF气凝胶的过滤效率从99.64%提升至99.91%；MTMS改性后的GMM在保持高效过滤（>99.50%）的同时，压降可降低至145.58 Pa，品质因子提升至0.039 Pa-1，并形成较优的多孔结构（平均孔径4.07 μm，透气度79 mm/s）；MTMS改性显著增强了气凝胶的力学性能和疏水性，GMM的压缩模量最高可达134.02 kPa，是MFC/GF气凝胶的15倍，水接触角可达131.7°。
Abstract:To address the high airflow resistance commonly associated with achieving high filtration efficiency in conventional air filtration materials， this study employed glass fibers (GF) as the matrix and introduced microfibrillated cellulose (MFC) to construct MFC/GF aerogels with a three-dimensional network structure. The composite was further modified via silanization using methyltrimethoxysilane (MTMS) and subsequently fabricated into microfibrillated cellulose/glass fiber aerogel filter materials (GMM) through a freeze-drying process. By regulating the MFC content and MTMS modification concentration， the prepared GMM were characterized in terms of their microstructure， filtration performance， mechanical properties， and hydrophobicity. The results showed that adding 0.1% MFC increased the filtration efficiency from 99.64% to 99.91% compared with GF. After MTMS modification， the pressure drop of the GMM decreased significantly while maintaining high filtration efficiency (>99.50%)， reaching as low as 145.58 Pa with a quality factor of 0.039 Pa-1. The GMM also exhibited a well-developed continuous porous structure (average pore size of 4.07 μm and air permeability of 79 mm·s-1). Moreover， MTMS markedly enhanced the mechanical strength （the compressive modulus reached 134.02 kPa， 15 times that of MFC/GF aerogel) and hydrophobicity (water contact angle of 131.7°).
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