纤维素
材料科学
水溶液中的金属离子
耐水性
化学工程
透射率
木质素
湿强度
纤维
纳米技术
金属
复合材料
化学
有机化学
光电子学
工程类
冶金
作者
Yazeng Zhang,Yangyang Qian,Yijun Liu,Chunfa Lei,Ge Qiu,Gang Chen
出处
期刊:Biomacromolecules
[American Chemical Society]
日期:2022-04-22
卷期号:23 (5): 1920-1927
被引量:5
标识
DOI:10.1021/acs.biomac.1c01374
摘要
Cellulose nanopaper is an attractive film material exhibiting huge potential in various fields, while its terrible water stability greatly hinders practical applications. Previous efforts on addressing this issue usually sacrifice the sustainability or material performance of film. In this study, we report a high-performing lignocellulosic nanopaper with superior water resistance and excellent optical properties. The strategy involves preparing a lignin-containing cellulose nanopaper (LCNP) first, and then infiltrating metal ions into the film to build cross-linking interactions within the fiber networks. Owing to the coordination bonds formed between metal ions and lignocellulosic components, the resulting metal ions cross-linked LCNP (M+-LCNP) displays outstanding water resistance, including the highest wet mechanical strength of ∼52 MPa after immersing in water for 24 h, which retains nearly 47% of the dry mechanical strength of the film. The ultralow water uptake ratio of ∼35% also confirms it possesses a superior wet dimensional stability. Moreover, these nanopapers also showcase the desired optical performances, including both high visible transmittance (>85%) and total ultraviolet-blocking efficiency (>91%, only transmitting a little of UVA). Overall, this fully degradable film is a promising alternative to replacing conventional plastics that are applied in multiple areas.
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