Facile Preparation of a Robust and Durable Superhydrophobic Coating Using Biodegradable Lignin-Coated Cellulose Nanocrystal Particles

Jingda Huang,Shaoyi Lyu,Siqun Wang

doi:10.3390/ma10091080

Abstract

It is a challenge for a superhydrophobic coating to overcome the poor robustness and the rough surface structure that is usually built using inorganic particles that are difficult to degrade. In this study, a robust superhydrophobic coating is facilely prepared by using commercial biodegradable lignin-coated cellulose nanocrystal (L-CNC) particles after hydrophobic modification to build rough surface structures, and by choosing two different adhesives (double-sided tape and quick-setting epoxy) to support adhesion between the L-CNC particles and the substrates. In addition to excellent self-cleaning and water repellence properties, the resulting coatings show outstanding mechanical strength and durability against sandpaper abrasion, finger-wipe, knife-scratch, water jet, UV radiation, high temperature, and acidic and alkali solutions, possessing a wide application prospect.

Highlights

Wettability is a very important characteristic and has a significant influence on actual applications for a solid material surface
When the lignin-coated cellulose nanocrystal (L-CNC) particles are directly scattered onto the double-sided adhesive surface tape coating surface and and rolled rolled with with the the wooden wooden bar, bar,the theL-CNC
The results show that the superhydrophobic property has no obvious change, demonstrates the strong micro structure of the coating surface

Summary

Introduction

Wettability is a very important characteristic and has a significant influence on actual applications for a solid material surface. At first found in nature, such as in lotus leaves [1], superhydrophobic surfaces exhibit many outstanding functions, such as self-cleaning [2,3], anti-icing [4], anti-fog [5] and corrosion-resistant [6,7] functions, and have attracted much attention. There have been many reports on the preparation of a superhydrophobic coating applied to different materials surfaces, such as wood [8], clothes [9,10], metal [11,12,13], filter paper [14], glass [15], and plastic [16]. Poor abrasion resistance is a recognized challenge and directly limits their further application

Methods

Results

Conclusion