Vinyl-modified hyperbranched polyether cross-linked hydroxyl-terminated polybutadiene-based polyurethane membrane for pervaporation recovery of butanol

Abstract

Hyperbranched polyether was synthesized and vinyl modified using the one-pot method and characterized by Fourier transform infrared spectroscopy (FTIR), hydrogen nuclear magnetic resonance spectroscopy, and thermogravimetric analysis (TGA). The as-obtained polyether was used to cross-link hydroxyl-terminated polybutadiene-based polyurethane (PU). The PU was characterized by FTIR, TGA, scanning electron microscopy, water contact angle, tensile tests, and swelling properties. The PU was used in pervaporation (PV) recovery of butanol from its dilute aqueous solution. The PV performance was determined using the separation factor (α) and permeate flux (F _p). With a membrane thickness of 31 μm, the separation factor of the membrane was up to 10.2 with a total flux of 320.7 g m⁻² h⁻¹ at 70°C.

Keywords

Hyperbranched polymers vinyl modified pervaporation butanol

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