tailieunhanh - Pervaporation dehydration of ethanol-water mixture using crosslinked poly(vinyl alcohol) membranes

The results of this study contributed to enrich the data of the crosslinking reaction of PVA membranes, and expected to help researcher in suitable choosing crosslinking agent for producing pervaporation PVA membrane for dehydration of ethanol solutions. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ K7- 2016 Pervaporation dehydration of ethanol-water mixture using crosslinked poly(vinyl alcohol) membranes Tran Le Hai Vuu Ngoc Duy Minh Hoang Minh Quan Nguyen Thi Nguyen Mai Thanh Phong* Ho Chi Minh City University of Technology, VNU-HCM (Manuscript Received on October 19th, 2016, Manuscript Revised November 28th, 2016) ABSTRACT Crosslinked poly(vinyl alcohol) (PVA) membrane was The changed via physicochemical crosslinking composite membranes were synthesized by reaction. casting selective crosslinked PVA films on the polyacrylonitrile (PAN) porous substrates. The (hydrophilicity and swelling degree) and separation performance of the prepared properties PVA films were prepared by in-situ crosslinking technique using four different crosslinking membranes were affected by the chemical structures of the crosslinking agents. agents, such as glutaraldehyde, fumaric acid, maleic acid and malic acid. The separation Furthermore, there was a trade-off between permeation flux and selectivity of the resulting performance in terms of permeation flux and membranes. When the flux increased, the separation factor of prepared membranes were evaluated for pervaporation dehydration of separation factor decreased. The results of this study contributed to enrich the data of the ethanol/water mixture of 80/20 wt% at 60 oC. The prepared membranes were also crosslinking reaction of PVA membranes, and expected to help researcher in suitable choosing characterized by FTIR, SEM, swelling and sessile drop contact angle measurements. It was crosslinking agent for producing pervaporation PVA membrane for dehydration of ethanol found that the chemical structure of the PVA solutions. Keywords: Poly (vinyl alcohol), crosslinking, membrane, pervaporation, dehydration. 1. INTRODUCTION Nowadays, pervaporation has been gaining much attention as an effective membrane technique for separating heat sensitive; .