Characterization of poly(vinyl alcohol)/poly(ethylene glycol) hydrogels and PVA-derived hybrids by small-angle X-ray scattering and FTIR spectroscopy

We report on the synthesis and surface characterization of thin-film nanocomposites using functionalized single-walled carbon nanotubes (CNTs) with a diamine-terminated oligomeric poly(ethylene glycol) [poly(ethylene glycol) bis (3-aminopropyl)-terminated 1500]. The functionalized CNT samples are soluble in highly polar solvents. Their common solubility allows for the intimate mixing of the functionalized nanotubes with the matrix polymer–poly(vinyl alcohol) by dip coating and wet casting to form nanocomposite thin films. We demonstrate the alignment of the CNT bundles in the thin films that are formed without the external field forces. We present our results and discuss alignment reorientations from the characterizations of the nanocomposite thin films by using a Raman spectrometer, scanning electron microscopy, and atomic force microscopy.

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Effects of blending poly(D,L-lactide) with poly(ethylene glycol) on the higher-oder crystalline structures of poly(ethylene glycol) as revealed by small-angle X-ray scattering

Journal of Physics Conference Series ◽

10.1088/1742-6596/272/1/012007 ◽

2011 ◽

Vol 272 ◽

pp. 012007 ◽

Cited By ~ 3

Author(s):

N D Tien ◽

T P Hoa ◽

G Kimura ◽

Y Yamashiro ◽

H Fujiwara ◽

...

Keyword(s):

Ethylene Glycol ◽

Small Angle ◽

Poly Ethylene Glycol ◽

X Ray ◽

Crystalline Structures ◽

X Ray Scattering ◽

Poly Ethylene ◽

Ray Scattering

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Synthesis and Characterization of Chitosan-Silica Membranes for Treating Hotel Wastewater Treatment as Affected by Mass of Poly Ethylene Glycol and Poly Vinyl Alcohol

Journal of Applied Materials and Technology ◽

10.31258/jamt.1.1.31-37 ◽

2019 ◽

Vol 1 (1) ◽

pp. 31-37

Author(s):

Jhon Armedi Pinem ◽

Dessy Natalia Indah Panjaitan ◽

M. Rifai Siregar ◽

Edy Saputra ◽

Syamsu Herman

Keyword(s):

Tensile Strength ◽

Wastewater Treatment ◽

Ethylene Glycol ◽

Vinyl Alcohol ◽

Synthesis And Characterization ◽

Poly Vinyl Alcohol ◽

Poly Ethylene Glycol ◽

Silica Membranes ◽

Poly Ethylene

Chitosan-Silica blended membranes were an attractive choice for the purification process because their porous size and morphology provide higher selectivity. In this study, the synthesis and characterization of chitosan-silica membranes were carried out with a mass variation of Poly Ethylene Glycol (PEG): 0,5; 2,5; 5 grams, Poly Vinyl Alcohol (PVA): 1, 2, 3 grams; and pressure 1, 2, 3 bars for the hotel wastewater treatment. The purpose of this study was to determine the characterization of chitosan-silica membranes obtained by SEM and tensile strength, and to determine the performance of membrane against the flux and rejection test with the effect of a mixture of PEG and PVA mass using raw materials in form of chitosan-silica. Tensile strength analysis showed that membrane with the highest tensile strength was 19,14 Mpa for PEG and 13,7 Mpa for PVA. The SEM test results showed a relatively small pore size of PEG 0,5 gram (0,061 μm) and PVA 2 grams (0,0284 μm). Flux and rejection results showed that membrane with 2,5 grams composition of PEG was the most effective in performance with the flux 18,19 L/m2.h and rejection elimination of BOD (50,76%), COD (46,09%) and TSS (48,00%). On the other hand, flux results showed that membrane with 3 grams composition of PVA was the most effective with the flux 20,13 L/m2.h and rejection elimination of BOD (62,84%), COD (64,73%) and TSS (38,40%). The characteristics of permeability, selectivity, and membrane pore statistics show that the silica membrane is an ultrafiltration membrane.

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