Superhydrophobic coatings have been widely developed to endue the materials with antibacterial, selfcleaning, antiseptic, and some other multi-functionalities. Fluorochemicals are the most commonly used superhydrophobic coatings, however, the released toxic substances from uorinated polymers are a signi cant source of water pollution and even a threat to human health. With the increasingly great attention to the environment, it is imperative to exploit green and effective hydrophobic coatings. Here, a nano brillated lignocellulose-based multifunctional superhydrophobic coating (NMSC) was fabricated by using an e cient silylation process from cellulose, tetraethyl orthosilicate, and cetyl trimethoxysilane. Microscopic, chemical structural, and thermal properties analyses revealed that the NMSC has nano roughness, low surface energy, and good thermal stability. More importantly, the NMSC displayed an unprecedented hydrophobic and self-cleaning performance (water contact angle ~ 165°). The NMSC superhydrophobic coating can realize long-term effective barriers to many uids, including strong acid (pH = 1), strong alkali (pH = 13), alcohols, alkanes, esters, and some other organic solvents. Moreover, the NMSC also showed good antibacterial properties with E. coli and S. aureus. This work not only improved the high-value application of lignocellulose but also provides a good pathway for the development of ecological and sustainable multi-functional coatings.

As non-biodegradable single-use plastic packaging products have been restricted in recent years, paperbased materials have attracted appreciable attention for their environmental bene ts. However, the hydrophilic nature of paper-based materials limits its application for replacing non-biodegradable plastic.In this study, an environmentally friendly and multifunctional superhydrophobic paper was developed using a simple spraying method, for reducing white pollution concerns caused by non-degradable singleuse plastic packaging products. The results shown that when base paper (BP) with a low spray amount of 1.5 g/m 2 , the coated paper (CP) exhibits excellent superhydrophobicity (water contact angle of 160°), water repellency (Cobb value of 7.5 g/m 2 ), and strong durability to sandpaper abrasion, nger-wipe, bending, folding, and sustained exposure to corrosion media (HCl with a pH of 1, NaOH with a pH of 10, high temperature treatment at 180°C, and UV irradiation). Additionally, not only does the CP surface directly prevented adhesion of S. aureus and E. coli, but also indirectly repelled solid contaminants upon washing with water, thereby demonstrating highly e cient anti-bacterial and anti-fouling property. The durable and multifunctional superhydrophobic paper developed in this study not only provides a novel direction to solve the problem of white pollution but also presents a better research pathway for the potential applications of paper-based materials.

Superhydrophobic coatings have been widely developed to endue the materials with antibacterial, self-cleaning, antiseptic, and some other multi-functionalities. Fluorochemicals are the most commonly used superhydrophobic coatings, however, the released toxic substances from fluorinated polymers are a significant source of water pollution and even a threat to human health. With the increasingly great attention to the environment, it is imperative to exploit green and effective hydrophobic coatings. Here, a nanofibrillated lignocellulose-based multifunctional superhydrophobic coating (NMSC) was fabricated by using an efficient silylation process from cellulose, tetraethyl orthosilicate, and cetyl trimethoxysilane. Microscopic, chemical structural, and thermal properties analyses revealed that the NMSC has nano roughness, low surface energy, and good thermal stability. More importantly, the NMSC displayed an unprecedented hydrophobic and self-cleaning performance (water contact angle ~ 165°). The NMSC superhydrophobic coating can realize long-term effective barriers to many fluids, including strong acid (pH = 1), strong alkali (pH = 13), alcohols, alkanes, esters, and some other organic solvents. Moreover, the NMSC also showed good antibacterial properties with E. coli and S. aureus. This work not only improved the high-value application of lignocellulose but also provides a good pathway for the development of ecological and sustainable multi-functional coatings.