Polyaniline salts as polymer‐based solid acid catalyst for low molecular weight poly(lactic acid)

Abstract

Polymer-based solid acid catalyst, polyaniline (PANI) salt, is used for the first time to synthesize polymer. In continuation of our work to synthesize organic chemicals using PANI-based solid acid catalyst, in this work, polylactic acid is synthesized by the condensation polymerization of lactic acid using PANI salts. PANI salts are characterized by FTIR, FE-SEM, and TGA analyses. Polymerization of lactic acid in xylene solvent at 140C for 24 h with the use of very low amount of PANI catalysts gave polylactic acid (PLLA) in the. Molecular weights of PLLA synthesized using PANI-MSA and PANI-TFA are found to be 4385 and 4830, respectively. This methodology gives highly crystalline polymer with mushroom cap-like morphology. Advantage of this methodology is the use of easily synthesizable, recyclable, easily handlable, cheaper, and eco-friendly nature of the catalyst.

Hybrid Material of PANI with TiO2‐SnO2: Pseudocapacitor Electrode for Higher Performance Supercapacitors

“…Among the many investigated electrode materials, conducting polymers and metal oxides are considered to be good alternatives due to their high capacitance from pseudocapacitance. In the category of conducting polymers, polyaniline (PANI) is considered as a most promising material because of its high capacitive characteristic, low cost, facile synthesis and environmental stability …”

Polymer‐based solid acid catalyst for the green production of diosgenin

“…The solid-state 13 C-NMR spectrum of the solid acid poly(MBA-SAA) shows in Figure 3. It can be found that the δ values for peak 1, 2, 3 were 235.83, 185.89, and 136.14 ppm respectively, which can be attributed to the carbon atom bonded to the nitrogen atoms on both sides, carbonyl groups of amide functional group and the carbon bonded to a sulfonic acid group, respectively.…”

“…Solid acid has been used to replace the traditional acid catalyst in some chemical processes, 12 such as conversion of biomass, 13 hydrolysis of cellulose, 14 esterification, 15 alkylation, 16 and catalytic reduction. 17 The results showed that the catalytic activity of solid acid is largely depended on acid sites on the solid surface.…”

Microstructure Evolution and Its Correlation with Performance in Nitrogen-Containing Porous Carbon Prepared by Polypyrrole Carbonization: Insights from Hybrid Calculations

“…Since the first report on nitrogen-containing porous carbon (NCPC) in 2005 [ 1 ], an enormous amount of research has been performed to investigate new classes of NCPCs with higher conductivity, larger surface areas [ 2 , 3 ], and tunable pore sizes for potential applications in gas adsorption [ 4 , 5 , 6 ], catalysis [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ], and energy storage and conversion devices [ 17 , 18 , 19 ]. When selecting the precursors for preparing NCPCs, aromatic conductive polypyrrole (PPy) is the preferred material due to its simple synthesis, high conductivity, environmental stability, and biocompatibility [ 20 , 21 , 22 , 23 , 24 , 25 ].…”