Underwater writable and heat-insulated paper with robust fluorine-free superhydrophobic coatings
Zhibin Jiao, Wencai Chu, Linpeng Liu, Zhengzhi Mu, Bo Li, Ze Wang, Zhiwei Liao, Yuchen Wang, Hao Xue, Shichao Niu, Saihua Jiang, Zhiwu Han, Luquan Ren
Abstract
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.