College of Textiles, Donghua University, Shanghai 201620, China.
Carbohydr Polym. 2013 Feb 15;92(2):2041-7. doi: 10.1016/j.carbpol.2012.11.085. Epub 2012 Dec 3.
Cellulose nanowhiskers as a kind of renewable and biocompatible nanomaterials evoke much interest because of its versatility in various applications. Herein, for the first time, a novel controllable fabrication of spider-web-like nanoporous networks based on jute cellulose nanowhiskers (JCNs) deposited on the electrospun (ES) nanofibrous membrane by simple directly immersion-drying method is reported. Jute cellulose nanowhiskers were extracted from jute fibers with a high yield (over 80%) via a 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)/NaBr/NaClO system selective oxidization combined with mechanical homogenization. The morphology of JCNs nanoporous networks/ES nanofibrous membrane architecture, including coverage rate, pore-width and layer-by-layer packing structure of the nanoporous networks, can be finely controlled by regulating the JCNs dispersions properties and drying conditions. The versatile nanoporous network composites based on jute cellulose nanowhiskers with ultrathin diameters (3-10 nm) and nanofibrous membrane supports with diameters of 100-300 nm, would be particularly useful for filter applications.
纤维素纳米纤维因其在各种应用中的多功能性而备受关注，是一种可再生和生物相容性的纳米材料。在此，首次通过简单的直接浸渍-干燥法，在静电纺丝（ES）纳米纤维膜上沉积黄麻纤维素纳米纤维（JCNs），报道了一种基于蜘蛛网状纳米多孔网络的新型可控制备方法。通过 2,2,6,6-四甲基哌啶-1-氧基自由基（TEMPO）/NaBr/NaClO 体系选择性氧化与机械匀浆相结合，从黄麻纤维中以高产率（超过 80%）提取出 JCNs。JCNs 纳米多孔网络/ES 纳米纤维膜结构的形态，包括纳米多孔网络的覆盖率、孔径和层状堆积结构，可以通过调节 JCNs 分散性能和干燥条件来精细控制。基于直径为 3-10nm 的黄麻纤维素纳米纤维和直径为 100-300nm 的纳米纤维膜支撑体的多功能纳米多孔网络复合材料，特别适用于过滤应用。
