With the growth of oil production and transportation, there is greater potential for accidental spills. Here we fabricated a robust superhydrophobic superoleophilic carbon nanotube/poly(dimethylsiloxane)-coated polyurethane sponge continuous absorption expulsion oils organic solvents from water surfaces. When applied in conjunction with vacuum system, this could separate great amounts oils—up to 35000 times its own weight—from one-step process also surfactant-free water-in-oil emulsions high...

How low can you go? Polybenzoxazines display surface free energies which are even lower than that of pure poly(tetrafluoroethylene). The contact angles and were monitored during the polymerizations (see graph for an example). These materials cheaper to prepare easier process fluoropolymers. Supporting Information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z503957_s.pdf or from author. Please note: publisher not responsible content functionality any...

Four main-chain type polybenzoxazine precursors were synthesized from the Mannich-type polycondensation of biphenol A, paraformaldehyde, and four typical aromatic diamines: 1,4-phenylenediamine, 4,4′-diaminodiphenyl methane, ether, 2,2-bis[4-(4-aminophenoxy)phenyl]propane. The solvent effect on was examined. We found that prepared in toluene/ethanol exhibit higher purity, molecular weight, lead to better thermal properties after curing than those chloroform, as recommended by Takeichi's...

In this paper, we report a simple and an inexpensive method for fabricating superhydrophobic/superoleophilic mesh films from microstructured ZnO coatings. The coatings, which do not contain any fluorinated compounds, maintain their superhydrophobicity superoleophilicity after ultraviolet irradiation display environmental stability. Furthermore, those ZnO-coated exhibit good selectivity (even underwater) excellent recyclability, making them promising candidates many potential applications,...

In this study, we found that poly(vinyl phenol)/polybenzoxazine (PVPh/PBZ) copolymers feature low surface energies when they possess a minimal number of intermolecular hydrogen-bonding interactions. For example, PVPh/PBZ = 30/70 exhibits an extremely energy 16.8 mJ/m2 after thermal curing—even lower than poly(tetrafluoroethylene) (22.0 mJ/m2)—based on calculations performed using two-liquid geometric method. Infrared spectroscopic analyses indicated decrease in the degree hydrogen bonding...

In this study, two different types of hybrid porous organic polymers (POPs), polyhedral oligomeric silsesquioxane tetraphenylpyrazine (POSS-TPP) and tetraphenylethene (POSS-TPE), were successfully synthesized through the Friedel−Crafts polymerization (TPP) (TPE), respectively, with octavinylsilsesquioxane (OVS) as node building blocks, in presence anhydrous FeCl3 a catalyst 1,2-dichloroethane at 60 °C. Based on N2 adsorption thermogravimetric analyses, resulting materials displayed high...

Abstract Water and electricity shortages constitute a global energy crisis that cannot be ignored. The sun is an unlimited source of energy, oceans provide abundant water renewable resources. In this study, poly(vinylidene fluoride) (PVDF)/graphene solar evaporator membranes are fabricated for simultaneous freshwater production power generation. Graphene addition transformed the PVDF crystal from α‐phase to piezoelectric self‐assembly β‐phase. resulting membrane used convert mechanical waves...

In this study, we report on a simple two-step casting process designed to create stable superhydrophobic surface. This method possesses the advantages of being both and inexpensive as well utilizing non-fluorine-containing compounds. Most interestingly, found that as-prepared surface properties not only for pure water but also corrosive under acidic basic conditions. Furthermore, polybenzoxazine surfaces had excellent environmental stability with regard heating organic solvent treatment in...

See also: Commentaire de travail C. T. Lee et al., pp. 613Endoscopy 2010; 42(08): 994-994DOI: 10.1055/s-0032-1306701

We report synthesis, properties, and optoelectronic device characteristics of six new indolocarbazole−acceptor conjugated copolymers prepared by Suzuki coupling reaction. Two different linkages indolocarbazole (28IC 39IC) four acceptors 2,3-didodecylthieno[3,4-b]pyrazine (TP12), 2,3-bis(4-(2-ethylhexyloxy) phenyl)thieno[3,4-b]pyrazine (TPO), 2,1,3-benzothiadiazole (BT), 2,3-bis(4-(2-ethylhexyloxy)phenyl)quinoxaline (QO) were used to explore the effects acceptor structure, linkage, side group...

Abstract In this study, we fabricated a superhydrophilic and underwater superoleophobic protonated melamine sponge for effective separation of water-rich immiscible oil/water mixtures with extremely high efficiency. This exhibited excellent antifouling properties could be used to separate continuously up 12 h without any increase in the oil content filtrate. Moreover, our compressed both surfactant-free -stabilized oil-in-water emulsions efficiencies. The performance its efficient, energy-...

Effective water use is currently a critical global challenge needed to prevent shortages and has attracted significant research attention. The realization of solar-driven evaporation by using effective converters considerable attention in recent years owing its potential for seawater desalination wastewater treatment. Consequently, this paper proposes simple two-step method prepare low-cost self-floating photothermal from waste coffee grounds. First, the grounds were carbonized at 1,000 °C...

Two different molecular weights of poly(methyl methacrylate) (PMMA) and PMMA containing polyhedral oligomeric silsesquioxane (PMMA−POSS) homopolymers have been prepared via the atom transfer radical polymerization (ATRP) technique. The miscibility specific interaction behaviors PMMA−POSS with phenolic resin were investigated by differential scanning calorimetry Fourier transform infrared spectroscopy (FTIR). FTIR results reveal that at least three competing equilibriums are present in...

Abstract A facile one‐step method has been developed to prepare both superhydrophobic and superoleophilic surfaces of polystyrene (PS) without any chemical modification. rough film consisting micro‐bead nano‐fiber mixed structures is formed by spraying a PS solution onto large area type substrate. The with such unique wettability properties can be used in oil/water separation as oil sorbents. magnified image

The hydrophilicity of bis(3-allyl-3,4-dihydro-2H-1,3-benzoxazinyl)isopropane(B-ala) polybenzoxazine film and superhydrophobic polybenzoxazine-hybrid surface can be controlled through UV exposure to change the ratio intra- intermolecular hydrogen bonds. A fraction intramolecular bonding as-cured sample will convert into upon thus results in an increase hydrophilicity. This simple method allows for manipulating at selected regions on a hybrid create patterned with superhydrophilic regions....