Multivalent Metal Ion Cross-Linked Lignocellulosic Nanopaper with Excellent Water Resistance and Optical Performance
文献类型： 外文期刊
作者： Zhang, Yazeng 1 ; Qian, Yangyang 1 ; Liu, Yijun 1 ; Lei, Chunfa 1 ; Qiu, Ge 1 ; Chen, Gang 1 ;
作者机构： 1.South China Univ Technol, Coll Light Ind & Engn, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China
2.West Yunnan Univ Appl Sci, Coll Tea Puer, Puer 665000, Peoples R China
3.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Hainan Key Lab Storage & Proc Fruits & Vegetables, Zhanjiang 524001, Peoples R China
期刊名称：BIOMACROMOLECULES （ 影响因子：6.978； 五年影响因子：7.055 ）
ISSN： 1525-7797
年卷期： 2022 年 23 卷 5 期
页码：
收录情况： SCI
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 similar to 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 similar to 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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