磺酸功能化聚（乙二醇二甲基丙烯酸酯-1-乙烯基-1,2,4-三唑）作为一种高效的固体酸催化剂，用于乳酸与甲醇的酯化反应。

Sulfonic acid functionalized poly(ethylene glycol dimethacrylate-1-vinyl-1,2,4-triazole) as a high-performance solid acid catalyst for the esterification of lactic acid with methanol.

机构信息

Department of Chemistry, Faculty of Science and Arts, Uludag University, 16059 Bursa, Turkey.

出版信息

J Colloid Interface Sci. 2012 Feb 1;367(1):394-7. doi: 10.1016/j.jcis.2011.10.039. Epub 2011 Oct 23.

DOI:10.1016/j.jcis.2011.10.039

PMID:22082796

Abstract

Sulfonic acid functionalized poly(ethylene glycol dimethacrylate-1-vinyl-1,2,4-triazole), poly(EGDMA-VTAZ-SO(3)H), is evaluated in the esterification of lactic acid with methanol. From nitrogen physisorption data, high surface area (220 m(2)/g) and type IV isotherm are obtained. Conversion measurements indicate a stronger interaction of poly(EGDMA-VTAZ-20%SO(3)H) with water molecules than that occurring in poly(EGDMA-VTAZ-10%SO(3)H). Hence, the higher catalytic activity of poly(EGDMA-VTAZ-10%SO(3)H) is related to the more hydrophobic microenvironment of -SO(3)H sites, which reduces the acid site deactivation associated with adsorption of water generated during the reaction. Moreover, apparent activation energy is found to be 48.02 kJ mol(-1), which can be comparable with the literature values.

摘要

磺酸功能化聚（乙二醇二甲基丙烯酸酯-1-乙烯基-1,2,4-三唑），聚（EGDMA-VTAZ-SO(3)H），用于乳酸与甲醇的酯化反应。从氮物理吸附数据中得到了高比表面积（220 m(2)/g）和 IV 型等温线。转化率测量表明，聚（EGDMA-VTAZ-20%SO(3)H）与水分子的相互作用强于聚（EGDMA-VTAZ-10%SO(3)H）中发生的相互作用。因此，聚（EGDMA-VTAZ-10%SO(3)H）具有更高的催化活性与-SO(3)H 位的疏水性微环境有关，这减少了与反应过程中生成的水吸附相关的酸位失活。此外，发现表观活化能为 48.02 kJ mol(-1)，可与文献值相媲美。