用于乙酸与2-丙醇酯化反应的强磺化酸嵌段和无规共聚物膜的制备与表征

Preparation and Characterization of Strongly Sulfonated Acid Block and Random Copolymer Membranes for Acetic Acid Esterification with 2-Propanol.

作者信息

Rosiles-González Verónica, Le Lagadec Ronan, Varguez-Catzim Paulina, Loria-Bastarrachea María I, González-Díaz Abigail, Hernández-Núñez Emanuel, Aguilar-Vega Manuel, González-Díaz María Ortencia

机构信息

Laboratorio de Membranas, Unidad de Materiales, Centro de Investigación Científica de Yucatán, A.C., Calle 43 No. 130, Chuburná de Hidalgo, Mérida 97205, Mexico.

Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Ciudad de México 04510, Mexico.

出版信息

Polymers (Basel). 2022 Jun 27;14(13):2595. doi: 10.3390/polym14132595.

DOI:10.3390/polym14132595

PMID:35808641

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9269333/

Abstract

In this paper, we report the synthesis of block and random copolymers of 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) and methyl methacrylate (MMA), with different AMPS feed ratios. These solution-processable copolymers with strongly sulfonated acid groups resulted in membranes with tunable ion exchange (IEC) and water absorption capacities. AFM images confirmed the microphase separation of block copolymer membrane, annealed under the appropriate conditions. The resulting copolymers from the random combination of a 1:1 molar ratio of AMPS and MMA monomers are effective at enhancing the esterification conversion of acetic acid, when compared with a reaction catalyzed by PAMPS--PMMA block copolymers and the previously studied catalytic membranes. With the membrane, the esterification reaction using acetic acid achieved 85% isopropyl acetate. These results are closely correlated with the increase in IEC (2.63 mmol Hg) and the relationship between weight loss (20.3%) and swelling degree (68%) in 2-propanol.

摘要

在本文中，我们报道了具有不同2-丙烯酰胺基-2-甲基-1-丙烷磺酸（AMPS）进料比的AMPS与甲基丙烯酸甲酯（MMA）的嵌段共聚物和无规共聚物的合成。这些具有强磺化酸基团的可溶液加工共聚物形成了具有可调离子交换（IEC）和吸水能力的膜。原子力显微镜（AFM）图像证实了在适当条件下退火的嵌段共聚物膜的微相分离。与由PAMPS - PMMA嵌段共聚物和先前研究的催化膜催化的反应相比，由AMPS和MMA单体1:1摩尔比的无规组合得到的共聚物在提高乙酸的酯化转化率方面是有效的。使用该膜，乙酸的酯化反应实现了85%的乙酸异丙酯产率。这些结果与IEC的增加（2.63 mmol Hg）以及在2-丙醇中的失重（20.3%）和溶胀度（68%）之间的关系密切相关。