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growth of octa-phenyl polyhedral oligomeric silsesquioxane nanocages over fluorinated graphene nanosheets: super-wetting coatings for oil and organic sorption.
Dalton Trans
January 2025
Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur-603203, Tamil Nadu, India.
Article Synopsis
- Superhydrophobic surfaces with hierarchical micro/nanostructures, like the developed O-Ph-POSS on fluorinated graphene, achieve high water contact angles (152°) and low surface energy (5.6 mJ/m²), making them highly robust and effective in water-repelling applications.
- The O-Ph-POSS-FG hybrid demonstrated remarkable oil absorption (200-500 wt%) and was successfully used to coat polyurethane sponges, achieving oil-water separation efficiencies of 90%-99%, even after multiple cycles.
- Durability tests showed that the sponges maintained superhydrophobic properties over time, retaining effective water contact angles and separation efficiency after one year and multiple mechanical stress tests.
Fluorine-free, superhydrophobic self-healing and UV-blocking cotton fabric for oil/water separation.
Int J Biol Macromol
December 2024
School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, PR China; State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430073, PR China. Electronic address:
The discharge of oily wastewater not only pollutes waters but also deteriorates our living environment. Superhydrophobic cotton fabric is considered as an important remedy material for oily wastewater cleanup due to outstanding advantages including low cost, high porosity and switchable wettability. However, the existing superhydrophobic fabrics cannot exhibit durable superhydrophobicity during real-life applications due to poor interaction between the coatings and fabric substrates.
View Article and Find Full Text PDFPreparation and Characterization of Atomic Oxygen-Resistant, Optically Transparent and Dimensionally Stable Copolyimide Films from Fluorinated Monomers and POSS-Substituted Diamine.
Polymers (Basel)
October 2024
Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
Optically transparent polyimide (PI) films with good atomic oxygen (AO) resistance have been paid extensive attention as thermal controls, optical substrates for solar cells or other components for low Earth orbit (LEO) space applications. However, for common PI films, it is usually quite difficult to achieve both high optical transparency and AO resistance and maintain the intrinsic thermal stability of the PI films at the same time. In the current work, we aimed to achieve the target by using the copolymerization methodology using the fluorinated dianhydride 9,9-bis(trifluoromethyl)xanthene-2,3,6,7-tetracarboxylic dianhydride (6FCDA), the fluorinated diamine 2,2-bis [4-(4-aminophenoxy)phenyl]hexafluoropropane (BDAF) and the polyhedral oligomeric silsesquioxane (POSS)-containing diamine -[(heptaisobutyl-POSS)propyl]-3,5-diaminobenzamide (DABA-POSS) as the starting materials.
View Article and Find Full Text PDFRegiocontrollable B(2/3)-H Alkenylation of -Carboranes.
Org Lett
September 2024
School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China.
Anionic -carboranes, as open-cage analogues of -carboranes with strong hydrophilicity and higher potential in the development of biomedicines, have been notably more challenging because of their strong interaction with transition metals. While the -cage B-H activation reactions of -carboranes have been widely studied, there are few reports on the direct functionalization of B-H bonds located on a closed polyhedral sphere. Here, we report an efficient palladium-catalyzed regioselective B(2/3)-H alkenylation of -carboranes with various alkenes and alkyne coupling partners, enabled by 3-methylpyridine directing groups, to achieve a regiocontrollable functionalization of B(2/3)-H vertices over highly reactive -cage B11-H vertex in -carboranes.
View Article and Find Full Text PDFEco-friendly porous composite of octaphenyl polyhedral oligomeric silsesquioxane and HKUST-1 with hydrophobic-oleophilic properties towards sorption of oils and organic solvents.
Dalton Trans
August 2024
Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur-603 203, Chengalpattu, Tamil Nadu, India.
The degradation of water bodies caused by organic pollutants from industrial wastewater discharge has made it necessary to develop new functional materials like hydrophobic-oleophilic materials that can efficiently remediate water. It is factual that many of the synthetic methods for creating hydrophobic-oleophilic materials involve the use of toxic or harmful reactants, such as fluorine or sulfur compounds. However, these methods often have significant drawbacks, including being hazardous to the environment, expensive, and complex to utilize.
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