Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8572, Japan.
Department of Pulp and Paper Technology, Institute of Technology and Science Bandung, Jl. Ganesha Boulevard Lot-A1 Kota Deltamas, Cikarang Pusat, Bekasi, Bekasi, 17530, Indonesia.
Sci Rep. 2020 Dec 3;10(1):21070. doi: 10.1038/s41598-020-78100-z.
The two types of cellulose nanofiber (CNF) surface characteristics were evaluated by oil contact angle under ethanol-water solution at several concentrations as well as in air. Wood pulp-based 2,2,6,6-tetramethylpiperidine-1-oxylradical (TEMPO)-oxidized cellulose nanofiber (TOCNF) sheets and bamboo-derived mechanical counter collision cellulose nanofiber (ACC-CNF) sheets were fabricated by casting followed by drying. The CNF shows underwater superoleophobic mimicking fish skin properties and slippery surface mimicking Nepenthes pitcher. The underwater superoleophobic properties of CNF was evaluated theoretically and experimentally. The theoretical calculation and experimental results of contact angle showed a large deviation. The roughness, zeta potential, and water absorption at different concentrations were key factors that determine the deviation. Antifouling investigation revealed that CNF was a good candidate for antifouling material.
通过在不同浓度的乙醇-水溶液中和空气中测量油接触角，评估了两种类型的纤维素纳米纤维（CNF）的表面特性。通过浇注和干燥制备了基于木浆的 2,2,6,6-四甲基哌啶-1-氧自由基（TEMPO）氧化纤维素纳米纤维（TOCNF）片和竹衍生机械对撞纤维素纳米纤维（ACC-CNF）片。CNF 表现出水下超疏油性能，类似于鱼类皮肤，表面光滑，类似于猪笼草。从理论和实验两方面评估了 CNF 的水下超疏油性。理论计算和接触角的实验结果存在较大偏差。粗糙度、zeta 电位和不同浓度下的吸水率是决定偏差的关键因素。防污研究表明，CNF 是一种很好的防污材料候选物。
