Novel pH-Sensitive Poly(Vinyl Alcohol) Based Polyampholyte as Pervaporation Membrane

Ping Rui Meng; Liang Bo Li

doi:10.4028/www.scientific.net/MSF.852.979

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HomeMaterials Science ForumMaterials Science Forum Vol. 852Novel pH-Sensitive Poly(Vinyl Alcohol) Based...

Novel pH-Sensitive Poly(Vinyl Alcohol) Based Polyampholyte as Pervaporation Membrane

Abstract:

Sodium acrylate (NaAA) and acrylamide (AM) were grafted onto poly (vinyl alcohol) (PVA) using potassium persulfate as an initiator, Graft copolymerization namely poly (vinyl alcohol)-g-poly (acrylamide/sodium acrylate) (PVA-g-PAM/SAC). The poly (vinyl alcohol)-g-poly (vinylamine/sodium acrylate) (PVAMC) was prepraed by Hofmann rearrangement.The PVAMC homogeneous membrane was characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM).The water resistance of the PVAMC membranes is the best when pH of the PVAMC solutions was 4, at that time the numbers of-NH₃⁺ and-COO^- groups trended to be equal, so the isoelectric point was pH=4. At 90 °C the pervaporation of PVAMC composite membrane was tested and showed that the separation factor and the permeate flux were about 1001 and 1341 g/(m²·h) for 90wt% ethanol aqueous solution, and they were about 1297 and 1040 g/(m²·h) for 90wt% isopropanol aqueous solution.

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Materials Science Forum (Volume 852)

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979-983

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.852.979

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April 2016

Authors:

Ping Rui Meng, Liang Bo Li

Keywords:

Dehydration, Isoelectric Point, Pervaporation, Poly(Vinyl Alcohol), Polyampholyte

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