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A novel seaweed and mussel inspired bilayer anti-oil-fouling and antifogging coating was proposed. The coating shows water resistance, mechanical durability, and long-term environmental stability. The coating performs good in anti-oil-fouling and anti-fogging. [Display omitted] Ecofriendly fabrication of anti-oil-fouling materials is of interest. Surfaces with underwater superoleophobicity have been fabricated which exhibit limited mechanical durability and water resistance. In this study, we report on a bioinspired bilayer design of a transparent anti-oil-fouling coating. Seaweed surfaces show anti-oil-fouling in the sea due to its high surface hydration ability. Mussels can adhere tightly onto a surface with good stability in the sea by virtue of its levodopa-containing secretions. The surface layer was fabricated using a crosslinked combination of carboxymethyl cellulose (CMC) and sodium alginate (AlgS) inspired by seaweed, with the addition of calcium ions. Polydopamine (PDA), a derivative of levodopa, was used as the underlayer to enhance bonding strength and water resistance. Oil that adhered to the coated surface was spontaneously detached upon immersion in water. The mechanism underlying this anti-oil-fouling effect was elucidated using Gibbs free energy theory. The coating exhibited mechanical durability and water resistance. The coating is transparent and preserves the original color of the substrate. The coated glass showed stable anti-fogging and anti-frost performance. These coatings hold promise for a wide range of anti-oil-fouling applications. [ABSTRACT FROM AUTHOR]

Passive cooling fabric that facilitates sweat‐wicking and evaporation is highly desirable for promoting human body's thermal comfort and reducing energy consumption. However, highly hydrophilic sweat‐wicking fabric fails to repel external fouling due to the contradiction between hydrophilicity and lyophobicity. Moreover, conventional passive cooling fabrics show limited evaporation capacity when they reach the adsorption limit in intense perspiration scenarios. Herein, a fouling‐proof cooling (FP‐Cool) fabric with an interactive functional structure design for highly‐efficient personal thermal regulation is proposed by constructing spatially distributed superoleophobic Janus channels on an optimized heat conductive superomniphobic fabric. The dominant superomniphobicity and superoleophobic Janus feature endow the outer FP‐Cool fabric with durable performance (up to 3000 cycles' abrasion) to repel oil/water‐based contaminations. The Janus channels rapidly pull sweat out of the inner fabric for efficient evaporation, ensuring a dry sense of skin. The FP‐Cool fabric preserves 40% higher thermal conductivity, and over 50% higher evaporation rate than conventional fabrics. In the sweat evaporation test, the FP‐Cool fabric shows up to 100% reduction in sweat gain ratio to cotton fabric. The concept would have implications for intelligent textiles design, and the synthesis strategy can be applied in various applications such as oil‐water separation and microfluidics control. [ABSTRACT FROM AUTHOR]