Formation of disulfonated poly(arylene ether sulfone) thin film desalination membranes plasticized with poly(ethylene glycol) by solvent-free melt extrusion

A piperidine-functionalized poly (ethylene glycol) bridged dicationic ionic liquid PEG800-DPIL(Cl) was synthesized and applied to catalyze the four-component Hantzsch reaction under solvent-free conditions and afford hydroquinolines with high to excellent yields. PEG800-DPIL(Cl) could be recovered by simple workup and recycled for at least eight times without obvious activity loss.

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Control the Surface Wettability of Thermo-Responsive Poly(Ethylene Glycol Methyl Ether methacrylate-co-Triethylene Glycol Methyl Ether Methacrylate) Thin Film by Varying Temperature

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.873.53 ◽

2021 ◽

Vol 873 ◽

pp. 53-58

Author(s):

Yang Yi Chen ◽

Min Pan ◽

Shan Hong Hu ◽

Qi Huan ◽

Chu Yang Zhang

Keyword(s):

Thin Film ◽

Ethylene Glycol ◽

Methyl Ether ◽

Triethylene Glycol ◽

Surface Wettability ◽

Molar Ratio ◽

Poly Ethylene Glycol ◽

Vis Spectroscopy ◽

Poly Ethylene ◽

Glycol Methyl Ether

The surface wettability of thermo-responsive random poly (ethylene glycol methyl ether methacrylate-co-triethylene glycol methyl ether methacrylate), abbreviated as P(MEOMA-co-MEO3MA), was investigated in thin film. UV-Vis spectroscopy shows that the LCST of P(MEOMA-co-MEO3MA) with molar ratios of 0:20, 6:14 and 9:11 were 43°C, 32 oC and 25 oC, respectively. LCST shifts towards lower temperature when molar ratio of MEOMA increases. ATR-FTIR indicates that P(MEOMA-co-MEO3MA) thin film experienced a collapse when the temperature passes its LCST. The contact angle of the paraffin oil on the film decreases 15o when the temperature is above its LCST, which confirms the surface wettability can be controlled. Atomic force microscopy shows the surface of the swollen thin film becomes rougher when above it LCST.

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Poly(ethylene glycol) Supported Metal Nitrates as Well-Organized Reagents for Hunsdiecker Conversion of α,β-Unsaturated Acids to β-Nitrostyrenes under Solvent and Acid-Free Conditions

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.21975 ◽

2019 ◽

Vol 31 (8) ◽

pp. 1798-1800

Author(s):

K. Ramesh ◽

S. Shylaja ◽

S. Ramgopal ◽

A. Sambashiva Rao ◽

K.C. Rajanna

Keyword(s):

Ethylene Glycol ◽

Solvent Free ◽

The Other ◽

Ferric Nitrate ◽

Poly Ethylene Glycol ◽

Peg 400 ◽

Metal Nitrates ◽

Solvent Free Conditions ◽

Poly Ethylene ◽

Supported Metal

Poly(ethylene glycol) (PEG) supported metal nitrates such as ferric nitrate and manganese nitrate were accomplished as well-organized reagents for Hunsdiecker conversion of α,β-unsaturated acids to β-nitrostyrenes under acid-free and solvent free conditions using grind-stone technique. However, in the case of unsaturated aliphatic acids, nitro alkene derivatives were obtained as products. PEG-400 was found the best among the other PEGs (PEG-200,300, 400, 600, 3000 and 6000) used in this protocol.

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