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Chitosan-Based Superhydrophobic-Coated Cotton Fabric for Oil-Water Separation and Heavy Oil Adsorption.
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Scientists created a water-repellent, oil-absorbing coating made from chitosan (a natural material from shellfish shells) that can soak up 37-58 times its own weight in oil while also killing over 90% of harmful bacteria like E. coli. This eco-friendly material could help clean up ocean oil spills more effectively, using sunlight to melt ice and break down thick oil, offering a sustainable alternative to traditional plastic-based cleanup tools that can contribute to microplastic pollution.
As environmental pollution becomes increasingly severe, especially the accumulation of plastic pollution and harmful chemicals, the call for promoting sustainable development is growing louder and louder, and it is urgent. Against this backdrop, renewable biopolymer materials are receiving extensive attention. Chitosan (CS), as a biodegradable high-molecular polysaccharide, has been broadly applied in the field of superhydrophobicity. In my paper, CS was prepared by a chemical method, graphene oxide (GO) was synthesized, and Leaf-like Zeolitic Imidazolate Framework (ZIF-L) and PDMS were successively deposited on cotton fabric. The prepared CS-GO-ZIF-L-PDMS cotton fabric has excellent superhydrophobic performance, with a water contact angle (WCA) of 161.2°, and also has good photocatalytic degradation and wear resistance. The antibacterial rate of the CS-GO-ZIF-L-PDMS coating on Escherichia coli and Staphylococcus aureus is greater than 90%. The CS-GO-ZIF-L-PDMS sponge can adsorb 37-58 times its own weight of oil, and its separation efficiency for various oil-water mixtures is greater than 97%. The CS-GO-ZIF-L-PDMS sponge has excellent photothermal performance and can quickly deice and adsorb high-viscosity heavy oil under the irradiation of simulated sunlight. This excellent performance can be applied to dealing with offshore oil pollution.
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Scientists created a sponge that repels water but soaks up oil, using safer, fluorine-free materials instead of the "forever chemicals" often used in similar products. Beyond cleaning up oil spills, this sponge can also absorb five common types of microplastics from water, offering a promising tool for tackling both oil pollution and plastic contamination without relying on chemicals linked to health concerns.
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A superhydrophobic sponge was engineered to selectively remove microplastics and oil from water, achieving high removal efficiency while also demonstrating antibacterial properties. The material maintained its performance across repeated use cycles, offering a promising approach for practical water treatment applications.
Highly Efficient, Recyclable Microplastic Adsorption Enabled by Chitin Hydrogen Bond Network Rearrangement
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Scientists developed a foam made from chitin, a natural material found in seafood shells, that can absorb over 400 milligrams of nano-sized microplastics per gram of material, even in saltwater. This recyclable, sustainable approach could help clean microplastics from ocean water, and the recovered plastic can be converted into useful products.
Constructing a Nonfluorinated, Durable, and Photothermal Superhydrophobic Polyurethane Sponge by Utilizing a Dual-Layer Design of Acetylene Black and Lignin Microparticles for Multifunctional Applications
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Scientists created a sponge coated with natural, non-toxic materials (instead of the harmful "forever chemicals" typically used) that repels water while soaking up oil, cleans up oil spills faster using sunlight for heat, and can even filter out microplastic particles from water. This matters because it offers a safer, more environmentally friendly way to clean up pollution without introducing more persistent chemicals into our water and ecosystems—addressing both oil contamination and the growing problem of microplastics that can end up in what we eat and drink.
Chitosan-based hybrid composites for emerging organic micropollutants removal from wastewater: Recent advancement, mechanism, up-scaling, and challenges
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Our tap water and wastewater often contain tiny amounts of drugs, pesticides, and even microplastics that standard treatment plants struggle to remove completely. This review paper rounds up existing research on chitosan—a natural material made from shrimp and crab shells—showing how scientists are turning it into sponge-like filters that can soak up these unwanted pollutants from water. While the technology looks promising, the researchers note it still faces hurdles before it can be scaled up for widespread use in real water treatment facilities.
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