Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, China.
College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.
Carbohydr Polym. 2022 Apr 15;282:119049. doi: 10.1016/j.carbpol.2021.119049. Epub 2022 Jan 7.
The cellulose nanocrystals (CNC) has attracted widespread attention in reinforced materials. However, the application of CNC in electrospinning has been limited due to its self-polymerization. Herein, a cobweb-like nanofibrous membrane was fabricated by electrospinning the polyacrylonitrile (PAN) and sulfydryl-functionalized CNC (SC). The SC content could reach to 48 wt% after the thiolation modification. The membrane with ultrafine fibers and interlaced nets possessed outstanding porosity (91.7%) and underwater superoleophobicity. An ultrahigh permeation flux of 1244 L·m·h with a separation efficiency of >99.9% was achieved driven by gravity. The mechanical properties also enhanced significantly with the increase of SC. When the addition amount of SC was 48 wt%, the maximum tensile stress was 2.9 MPa, which was 3.4 times than that of the PAN membrane. The antifouling performance and chemical stability endowed the SC(48)/PAN membrane with intriguing reusability, thus making it exhibit enormous potential in oil/water separation.
纤维素纳米晶体（CNC）在增强材料中受到广泛关注。然而，由于其自聚合性，CNC 在静电纺丝中的应用受到限制。本文通过静电纺丝制备了一种具有蛛网状纳米纤维的膜，该膜由聚丙烯腈（PAN）和巯基功能化的 CNC（SC）组成。经过巯基改性，SC 的含量可达到 48wt%。该膜具有超细纤维和交错的网络，具有出色的孔隙率（91.7%）和水下超疏油性。在重力驱动下，实现了超高渗透通量 1244 L·m·h 和分离效率>99.9%。随着 SC 含量的增加，力学性能也显著提高。当 SC 添加量为 48wt%时，最大拉伸应力为 2.9MPa，是 PAN 膜的 3.4 倍。SC(48)/PAN 膜具有良好的抗污染性能和化学稳定性，因此具有巨大的油水分离应用潜力。
