Jiao Zhibin, Chu Wencai, Liu Linpeng, Mu Zhengzhi, Li Bo, Wang Ze, Liao Zhiwei, Wang Yuchen, Xue Hao, Niu Shichao, Jiang Saihua, Han Zhiwu, Ren Luquan
Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China.
Nanoscale. 2020 Apr 21;12(15):8536-8545. doi: 10.1039/c9nr10612j. Epub 2020 Apr 3.
Since its invention invented in China, paper has been widely used in the world for quite a long time. However, some intrinsic defects servely hinder its application in some extreme conditions, such as underwater or in fire. Herein, a bio-inspired durable paper with robust fluorine-free coatings was fabricated via a two-step spray-deposition technique. It not only consisted of modified SiO microspheres and nanoparticles, but also contained an epoxy resin, endowing the paper with multifunctional properties. First, this bio-inspired functional paper showed excellent superhydrophobic and self-cleaning properties with a high static water contact angle (WCA) of 162.7 ± 0.5° and a low sliding angle (SA) of 5.7 ± 0.6°. Moreover, it possessed unusual repellent properties toward multiple aqueous-based liquids and heat-insulated properties. Second, this paper could be used for writing underwater and maintained satisfactory superhydrophobic performance for a long time with a WCA of 153.3 ± 1.8°. Besides, its high mechanical robustness was also experimentally confirmed in harsh working conditions, such as strong acid/alkali, boiling water, abrasion, bending, and folding. Compared with conventional paper, it is anticipated that this bio-inspired functional paper would be really competitive and demonstrate great potential in the field of underwater and fire-proof applications.
自纸在中国发明以来，它在世界范围内已被广泛使用了很长时间。然而，一些固有缺陷严重阻碍了它在某些极端条件下的应用，比如水下或火灾环境中。在此，通过两步喷雾沉积技术制备了一种具有坚固无氟涂层的仿生耐用纸。它不仅由改性SiO微球和纳米颗粒组成，还含有环氧树脂，赋予了纸张多功能特性。首先，这种仿生功能纸表现出优异的超疏水和自清洁性能，静态水接触角（WCA）高达162.7±0.5°，滑动角（SA）低至5.7±0.6°。此外，它对多种水基液体具有特殊的排斥性能以及隔热性能。其次，这种纸可用于水下书写，并能长时间保持令人满意的超疏水性能，WCA为153.3±1.8°。此外，在强酸/强碱、沸水、磨损、弯曲和折叠等恶劣工作条件下，其高机械强度也通过实验得到了证实。与传统纸张相比，可以预期这种仿生功能纸将具有很强的竞争力，并在水下和防火应用领域展现出巨大潜力。
