Ultraviolet irradiation is used for the first time to study its effect on fluorinated graphene (FG). It causes reduction and transformation of FG.

In this study, the degradation of diclofenac (DCF) by heat-activated persulfate (HAP) was investigated. It found that DCF could be degraded efficiently HAP. The followed pseudo-first-order kinetic model, and highest observed rate constant (k obs) obtained at pH 3. sulfate radical mainly responsible for removal < 7, whereas it hydroxyl high pH. elimination enhanced with increase in temperature or initial dosage persulfate. Presence Cu2+ CO3 2- improve degradation, while an inhibition effect...

Realization of microwave-absorbing materials with “small thickness, light weight, broad bandwidth, and low reflectivity” is an invariable topic. In this paper, Sm2Fe14BHx/polyurethane (SFBH/PU) composites planar anisotropy were prepared by reduction–diffusion (R/D) water bath hydrogenation (WBH) process. A minimum reflection loss (RL) value reaches −59.7 dB at the perfect matching frequency 13.79 GHz a thickness only 1.035 mm. Compared unhydrogenated SFB, bandwidth reflectivity are...

It is still a challenge to prepare water-dispersible carbon nanotubes which are proved have great potential in numerous applications. In this present work, as low 2% fluorine gas was used initiator oxygen/fluorine dual functional MWCNTs (OF-MWCNTs) with good water dispersibility through one-step method under oxygen atmosphere. The aromatic structure of OF-MWCNTs reserved some extent resulting better electrical conductivity than pure fluorinated (F-MWCNTs). amount atoms and (hereinafter...

ABSTRACT In this study, we adapted a simple, low‐cost, and environmentally friendly method to fabricate anisotropic polyimide (PI) aerogels. During directional freezing of an aqueous poly(amic acid) ammonium salt solution from the profile center axis cylindrical mold, ice crystals preferred grow along radial direction mold. After were sublimated by freeze drying, pore structure was formed in The prepared PI aerogels had lower densities (0.04–0.22 g/cm 3 ) higher porosities (84–97%) exhibited...

An easy-plane FeSi3.5 composite with excellent magnetic properties and loss at MHz were proposed. The has ultra-low 10 4 mT, about 372.88 kW/m3. In order to explore the reason that Pcv of is ultra-low, a none composite, without processing as control group, measured microstructure, properties. We first found real why materials do not work properly due overheat dramatical increase excess can greatly re-duce by measurement separation. total much higher than where major part in even over 80%...

The novel vulcanization of fluoroelastomer by fluorination is studied; moreover, the simultaneously accompanied fluorine content increases and tribological property improved.

The various high-density surface functionalizations of UHWMPE based on fluorine activation and subsequent derivatization reactions are reported, offer a simple convenient pathway to incorporate useful functional groups.

Polyimide (PI) aerogels are open-celled materials with high porosity, low density, excellent mechanical property and thermal stability. Linear PI exhibit drastic shrinkage during the fabrication process. Cross-linked were usually fabricated by utilizing costly cross-linking agents such as 1,3,5-triaminophenoxybenzene or octa-(aminophenyl)silsesquioxane. Herein, amino functionalized multi-walled carbon nanotubes (MWCNTs-NH 2 ) prepared amidation reaction; PI/MWCNTs-NH composite adding...

ABSTRACT Polyimide (PI) aerogels with highly aligned tube‐like pores were fabricated by unidirectional ice crystal‐induced self‐assembly method. During this process, the mold bottom contacted freezing medium, aqueous solution of poly(amic acid) (PAA) ammonium salt in was unidirectionally frozen, crystals grew from to top PAA (PAS) along direction, which endowed PI after sublimation and thermal imidization PAS. The obtained had low densities (0.077–0.222 g cm −3 ) high porosities (83.8–94.2%)...

The spherical nanoporous TiO 2 aerogels were prepared by a simple ethanol-thermal method, using cellulose alcohol-gel as the template. morphology, crystalline structure, pore size, specific surface area, and photocatalytic activity of obtained aerogel separately characterized scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS), N adsorption-desorption isotherms, double beam UV-VIS spectrophotometer. characteristics presented...

The rare earth alloy Y2Co17−xNix was prepared by a low-cost co-precipitation reduction-diffusion process, and its crystal structure, static magnetic properties, microscopic morphology were systematically characterized. effects of Ni doping with different contents on the electromagnetic parameters wave absorption properties Y2Co17−xNix/polyurethane(PU) compounds researched in frequency range 0.1–18 GHz. results show that change significantly doping, maximum reflection loss Y2Co14Ni3/PU...

Abstract A series of density gradient polyimide (PI) aerogels were prepared using layer‐by‐layer assembly and radial freezing method. Briefly, a layer poly(amic acid) (PAA) ammonium salt aqueous solution was first radially frozen. Then, the second PAA (PAS) different concentration added on top PAS multilayer solid sample could therefore be fabricated by repeating this similar procedure. The PI obtained after drying final thermal imidization treatment. Each had anisotropic pore structure,...

The easy-plane FeSi3.5 composite with excellent magnetic properties and power loss is proposed. of the are studied by using none as a control. This has an initial permeability 62, resonance frequencies 100 MHz 1.5 GHz, frequency stability 40 MHz. In addition, also properties, high-frequency only 108.12 kW/m3. three kinds reduced compared through separation, especially eddy current excess loss. 0.03 12.93 kW/m3 at 500 kHz, which reduce 99.44% 92% composite. Effective reduction significant...

Recommending items solely catering to users' historical interests narrows horizons. Recent works have considered steering target users beyond their by directly adjusting exposed them. However, the recommended for direct might not align perfectly with evolution, detrimentally affecting experience. To avoid this issue, we propose a new task named Proactive Recommendation in Social Networks (PRSN) that indirectly steers interest utilizing influence of social neighbors, i.e., indirect exposure...

Based on actual working conditions and parameters of the hydraulic steering gear, purpose is optimizing rubber seal gear by different rubbers mixing technology. Compare five kinds with metal friction characteristics in dynamic fit, it can obtain a performance excellent real specific operation conditions. And then improve overall service life gear. It first prepared same hardness TPU PVC blends that ratio 3:7, 5:5and7:3 this article. The pros cons are analyzed wear properties above...

The spherical cellulose aerogels with core-shell structure were prepared through hanging drop method in a regenerated non-polar solution. procedures of these aerogels' preparation include solidification the acetic acid solution to form hydrogel, solvent exchange t-butyl alcohol and freeze drying. obtained different concentration, characterized BET analysis electron microscopy. Their density porosity varied linearly content initial And gel shrinkage upon drying was limited to, on average,...

TiO2-g-Polystyrene(PS) nano-microspheres were prepared by grafted styrene monomer on the surface of nano-TiO2 particles via emulsion polymerization, and its morphology studied Transmission electron microscopes(TEM), Fourier transform infrared spectroscopy(FTIR) thermal gravimetric analysis(TGA). The results showed that TiO2-g-PS nano-microsphere had a structure sphericity composed TiO2 PS as core shell respectively. core-shell nanoparticles subsequently used filler in matrix, impact strength...