Underwater writable and heat-insulated paper with robust fluorine-free superhydrophobic coatings,Nanoscale

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Underwater writable and heat-insulated paper with robust fluorine-free superhydrophobic coatings
Nanoscale ( IF 5.8 ) Pub Date : 2020/03/19 , DOI: 10.1039/c9nr10612j
Zhibin Jiao _{1,

2,

3,

4,

5} , Wencai Chu _{1,

2,

3,

4,

5} , Linpeng Liu _{1,

2,

3,

4,

5} , Zhengzhi Mu _{1,

2,

3,

4,

5} , Bo Li _{1,

2,

3,

4,

5} , Ze Wang _{1,

2,

3,

4,

5} , Zhiwei Liao _{6,

7,

8,

9} , Yuchen Wang _{6,

7,

8,

9} , Hao Xue _{1,

2,

3,

4,

5} , Shichao Niu _{1,

2,

3,

4,

5} , Saihua Jiang _{6,

7,

8,

9,

10} , Zhiwu Han _{1,

2,

3,

4,

5} , Luquan Ren _{1,

2,

3,

4,

5}

Affiliation

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 SiO₂ 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.

更新日期：2020-04-17

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