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High-strength and super-hydrophobic multilayered paper based on nano-silica coating and micro-fibrillated cellulose

Herein, a facile strategy was proposed for preparing a high-strength and super-hydrophobic packaging paper with improved moisture and air barrier properties, which was derived from cellulosic pulps, micro-fibrillated cellulose (MFC), and nano-silica (n-SiO2). Owning to the laminated process followed by spraying approach, MFC and n-SiO2 were assembled onto two surfaces of the cellulose paper base, respectively, endowing the mechanical behaviors and superhydrophobic performance of this biodegradable composite papers as packaging material. The as-obtained multilayered papers demonstrated impressive dry tensile strength and remarkable wet tensile strength of 6542.5?N/m and 5875?N/m, which were increased by 56% and 2277%, respectively. In addition, the multilayered paper with rational mechanical properties possessed low permeabilities of air (3.17??10?3??m?Pa?1?s?1), oxygen (9.687?cm3?m?2?day?1?atm), and water vapor (378.24?g?m?2?day?1), respectively, as well as a superhydrophobic performance with the contact angle of ~151.2?. Overall, the feasibility of large-scale production of biodegradable packaging materials in the paper-making industry is demonstrated by the fact that the micro/nanostructures and hydrophobic surfaces could be directly constructed on cellulosic paperboard.

» Author: Haoying Chen, Bin Wang, Jinpeng Li, Guangdong Ying, Kefu Chen

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