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

IF 0.7 Q4 CHEMISTRY, MULTIDISCIPLINARY

Orbital: The Electronic Journal of Chemistry Pub Date : 2024-05-04 DOI:10.17807/orbital.v15i5.19865

Altamiro Xavier de Souza, Paulo Donato Frighetto, Gabriel Badagnani de Carvalho, Henrique De Castro Degiovani, Marcelo Firmino de Oliveira, Cláudio Roberto Neri, Vinícius Palaretti, A. M. de Faria, Daniel Pasquini, Luís Carlos de Morais

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引用次数: 0

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.

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不同磺化度的聚砜：使用乙酰硫酸盐的简单方法

在这项工作中，作者创新性地将 Udel® 聚砜（PSU）与乙酰硫酸酯（ACS）在 45°C 的二氯甲烷和惰性 N2 大气（g）中回流 1.5 小时进行均相磺化。使用不同比例的 ACS，可得到不同磺化度 (DS) 的磺化产品。傅立叶变换红外光谱和 1H NMR 对磺化聚砜（PSU-S）进行了确认，分别称为 PSU-SA（高磺化度）和 PSU-SB（低磺化度）。通过热重分析（TGA/DSC）确定了 DS 值，指数在 0.883 和 3.022 之间变化，对应的磺化聚合物的离子交换能力（IEC）为 1.720 至 4.400 meq/g。1H NRM 监测并确认了与所用方法有关的 DS 演变。进行磺化处理是为了提高这种聚合物在未来生物燃料生产中的适用性，目标是将其用于油脂酯化和酯交换机制的催化过程。

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来源期刊

Orbital: The Electronic Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： Orbital: The Electronic Journal of Chemistry is a quarterly scientific journal published by the Institute of Chemistry of the Universidade Federal de Mato Grosso do Sul, Brazil. Original contributions (in English) are welcome, which focus on all areas of Chemistry and their interfaces with Pharmacy, Biology, and Physics. Neither authors nor readers have to pay fees. The journal has an editorial team of scientists drawn from regions throughout Brazil and world, ensuring high standards for the texts published. The following categories are available for contributions: 1. Full papers 2. Reviews 3. Papers on Education 4. History of Chemistry 5. Short communications 6. Technical notes 7. Letters to the Editor The Orbital journal also publishes a number of special issues in addition to the regular ones. The central objectives of Orbital are threefold: (i) to provide the general scientific community (at regional, Brazilian, and worldwide levels) with a formal channel for the communication and dissemination of the Chemistry-related literature output by publishing original papers based on solid research and by reporting contributions which further knowledge in the field; (ii) to provide the community with open, free access to the full content of the journal, and (iii) to constitute a valuable channel for the dissemination of Chemistry-related investigations.

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