A Facile Method for Processing Durable and Sustainable Superhydrophobic Chitosan-Based Coatings Derived from Waste Crab Shell

Abstract

The substitution of synthetic raw materials with renewable feedstock is fueling a lot of interest to drive new scientific and technical advancements that underpin this strategy. In this context and looking at the broad prospect of chitosan, herein, we proposed a facile, economical, and novel strategy to process high-yield (44% ± 3) chitosan from waste crab shells and apply the processed chitosan to fabricate a durable, multifunctional, ecofriendly superhydrophobic coating. The coating was developed by binding the amines of chitosan and a long-chain polymer, octadecylamine using a cross-linking agent (glutaraldehyde). Applying the coating onto intrinsically hydrophilic polyester fabric and typical surgical-grade cotton yielded superhydrophobic materials with water contact angles of 158.6 and 161.4°(± 3), respectively. A preliminary study revealed that the coating could endure multiple cycles of laundry (60×), sandpaper abrasion (55×), and tape peel test (80×) with little diminution in the superhydrophobic property. Interestingly, any decrease in the superhydrophobicity could be restored after ironing the fabrics for 2 min, indicating that the effect was reversible. Furthermore, the coating could transform an ordinary hydrophilic polyurethane sponge into an excellent superhydrophobic− superoleophilic absorbent, which can rapidly absorb and separate a variety of organic solvents and oils from oil/water mixtures.

Photothermal Superhydrophobic Chitosan-Based Cotton Fabric for Rapid Deicing and Oil/Water Separation

“…This shows that the superhydrophobic properties of modified cotton fabrics are produced by the combination of the micro–nano rough structure formed by ACNTs and the low surface energy provided by ODA. It is noteworthy that chitosan nanoparticles play the role of textured material . The construction of these layered rough structures is one of the keys to eventually producing a superhydrophobic interface.…”

Anticancer Activity of Iron Oxide Nanoparticles Synthesized from Chitosan Aqueous Extract of Penaeus monodon Shrimp Shells Against Pc-3 Cell Line

“…Moreover, chitosan-based biomaterials induce both humoral and cellular immune responses and therefore, chitosan could be used in the development of therapeutic cancer vaccines (Roy et al, 2022). Finally, before the clinical trial of chitosan-based anticancer agents, an extensive preclinical study should be performed to examine their safety, efficacy, short and long-time side effects.…”

Recent Progress in Chitosan-Based Nanomedicine for Its Ocular Application in Glaucoma

“…The positive charge could be attributed to the presence of an amine group on chitosan molecules [ 39 ]. In another investigation, pilocarpine-loaded ceria nanocapsules were modified with chitosan of different amination levels [ 40 ].…”