We report herein the preparation of ortho‐vinylaryl S‐trifluoromethylated sulfoximines through cross‐coupling reactions. Two efficient palladium‐catalyzed procedures (Stille and Suzuki) were...

2002年12月15日 · ATR measurements can be at best used to analyze the dense selective side of membranes, while the optical interfacing of the ATR crystal with the macroporous side can be critical when a very rough surface is present.

According to the extended FTIR research by Cai et al., 62 both the 1276 and 1232 cm −1 bands appearing together in the ATR-FTIR spectrum and the bands at 840 and 510 cm −1 are characteristic ...

In this work, we analyze the FTIR vibrational bands of PVDF materials fabricated by different processes with detailed XRD (X-ray diffraction) characterization to identify the structural α, β and γ phases.

2025年1月25日 · One of the most commonly used membrane materials is PVDF, because it has outstanding properties, such as high mechanical strength, chemical resistance, thermal stability (melting point of 140–170...

2023年4月5日 · Herein, we have developed a novel synthetic route for the preparation of AEMs with a controlled graft length and density by grafting 2-(dimethylamino)ethyl methacrylate (DMA) chains from the backbone of poly(vinylidene fluoride) (PVDF) by Cu(I) catalyzed atom transfer radical polymerization to produce PVDF-g-PDMA copolymer, which is converted ...

2023年12月11日 · The prominent stretching and bending modes of vibration in PVDF and DHF-PVDF was further confirmed by attenuated total reflectance infrared spectroscopy (ATR-IR) in the finger print region using Thermo Scientific NICOLET iS50 ATR-IR spectrometer performing background calibrations at each record of 32 scans per sample.

In this study, super-hydrophobic solutions were prepared and applied to ceramic substrates by adding alumina particles with different particle size distributions into the polyvinylidene fluoride...

Polyvinylidene fluoride (PVDF) is one of the most widely studied and well-accepted polymers for membrane fabrication through a conventional phase inversion method (PIP). PVDF-unique features include good degradation resistance against radiation, outstanding chemical and thermal resistance, and excellent mechanical properties [1,2,3]. It is a ...

PVDF was prepared by compression molding, and its phase content/structure was assessed by WAXD, DSC, and FTIR-ATR spectroscopy. Next, PVDF samples were aged in bioethanol fuel at 60 °C or...