Orbital - Vol. 16 No. 1 - January-March 2024
FULL PAPERS

Polysulfone with Different Degrees of Sulfonation: Simple Method with Acetyl Sulfate

Altamiro Xavier de Souza
Federal Institute of São Paulo - Sertãozinho campus
Paulo Donato Frighetto
paulofrighetto@ifsp.edu.br
Gabriel Badagnani de Carvalho
Institute of Exact, Natural Sciences and Education (ICENE), Federal University of Triângulo Mineiro – UFTM, Uberaba, MG, Brazil. Address: 1400 Randolfo Borges Júnior Avenue, Univerdecidade, Zip Code: 38064-200, Uberaba-MG
Henrique de Castro Degiovani
Institute of Exact, Natural Sciences and Education (ICENE), Federal University of Triângulo Mineiro – UFTM, Uberaba, MG, Brazil. Address: 1400 Randolfo Borges Júnior Avenue, Univerdecidade, Zip Code: 38064-200, Uberaba-MG.
Marcelo Firmino de Oliveira
Department of Chemistry, Faculty of Philosophy, Sciences, and Letters of Ribeirão Preto, University of São Paulo (FFCLRP/USP). Address: Bandeirantes Av. 3900, USP Campus - Bairro Monte Alegre, Zip Code: 14040-900, Ribeirão Preto-SP, Brazil.
Cláudio Roberto Neri
Department of Chemistry, Faculty of Philosophy, Sciences, and Letters of Ribeirão Preto, University of São Paulo (FFCLRP/USP). Address: Bandeirantes Av. 3900, USP Campus - Bairro Monte Alegre, Zip Code: 14040-900, Ribeirão Preto-SP, Brazil
Anizio Marcio de Faria
Institute of Exact and Natural Sciences of Pontal – ICENP – Federal University of Uberlândia (UFU). Address: 1600 Rua Vinte – Bairro Tupã, Zip Code: 38304-402, Ituiutaba-MG, Brazil
Daniel Pasquini
Institute of Chemistry, Federal University of Uberlândia (UFU). Address: 2121 João Naves de Ávila Avenue, Santa Mônica, Zip Code: 38400-902, Uberlândia-MG, Brazil
Luís Carlos de Morais
Institute of Exact, Natural Sciences and Education (ICENE), Federal University of Triângulo Mineiro – UFTM, Uberaba, MG, Brazil. Address: 1400 Randolfo Borges Júnior Avenue, Univerdecidade, Zip Code: 38064-200, Uberaba-MG
Published May 4, 2024
Keywords
  • degree of sulfonation; homogenous sulfonation; ion exchange capacity; Kopf method; sulfonated polysulfone; Udel polysulfone
How to Cite
(1)
de Souza, A. X.; Frighetto, P. D.; Badagnani de Carvalho, G.; de Castro Degiovani, H.; Firmino de Oliveira , M.; Neri, C. R.; Palaretti, V.; de Faria , A. M.; Pasquini, D.; de Morais , L. C. Polysulfone With Different Degrees of Sulfonation: Simple Method With Acetyl Sulfate . Orbital: Electron. J. Chem. 2024, 16, 41-49.

Abstract

In this work, the authors present as an innovation, the homogeneous sulfonation of Udel® polysulfone (PSU) with acetylsulfate (ACS) under reflux at 45°C in dichloromethane and inert N2 atmosphere (g) for 1.5 h. Different proportions of ACS were used, obtaining sulfonated products with varying degrees of sulfonation (DS). Confirmation of sulfonated polysulfone (PSU-S), denominated as PSU-SA (high degree of sulfonation) and PSU-SB (low degree of sulfonation), was carried out by FTIR and 1H NMR. Determination of DS was carried out through thermogravimetric analysis (TGA/DSC), varying indexes between 0.883 and 3.022, which correspond to a sulfonated polymer with ion exchange capacity (IEC) from 1.720 to 4.400 meq/g. The evolution of DS related to methods used was monitored and confirmed by 1H NRM. Sulfonation is undertaken to enhance the suitability of this polymer for future applications in the production of biofuels, targeting its utilization in catalytic processes for esterification and transesterification mechanisms of oils and fats.