High-speed shear-induced micro regenerated cellulose materials preparation: A promising solution for highly efficient and low pressure drop air filtration using agricultural waste
High-speed shear-induced micro regenerated cellulose materials preparation: A promising solution for highly efficient and low pressure drop air filtration using agricultural waste
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DOI：
10.1016/j.cej.2023.146603
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发表时间：
2023-10-12
影响因子：
15.1
通讯作者：
Peng，Lincai
中科院分区：
文献类型：
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作者：
Hu，Qiuyue;Gao，Xin;Peng，Lincai
纤维素具有良好的生物相容性和可降解性，在空气过滤领域的应用越来越受到人们的关注。然而，受天然结构强度的限制，基于天然纤维素的空气过滤器通常具有较高的压降（ΔP）或较厚的体积。在本研究中，通过高速剪切诱导的简单制备工艺，使用少量的干材料（9 ~ 12 mg/cm 3）生产出具有低ΔP（6.8 Pa）的高效空气过滤器。分析表明，在整个凝固过程中，由于剪切作用，再生纤维素（RC）的分子链被拉伸并有序排列，使RC结晶度增加。此外，RC过滤器在高PM浓度条件下表现出高PM2.5捕获效率（超过99.65%）和高品质因数（0.853 Pa-1）。这项工作为农业废弃物生物资源产生的空气过滤潜力提供了一个新的视角，并为日常呼吸保护介质提供了一个有趣而简单的途径。
Cellulose has attracted much attention in application of air filtration for the excellent ability of degradability and biocompatibility. However, limited by the strength of natural structure, air filters based on native cellulose usually have high pressure drop (ΔP) or thick volume. In this study, an efficient air filter was produced with low ΔP (6.8 Pa) using a low amount of dry material (9 ∼ 12 mg/cm3) through simple preparation process with high-speed shear induced. Analysis showed the chains of regenerated cellulose (RC) were stretched and arranged orderly due to the shear induced during the entire coagulation process, letting to an increasing of crystalline of RC. Furthermore, RC filter exhibited a high PM2.5 capture efficiency (over 99.65 %) with high-quality factor (0.853 Pa−1) under high PM concentration conditions. This work gave a novel sight on the potential of air filtration produced by agricultural waste bioresources furthermore, offered an interesting and simple avenue for daily respiratory protective media.