Tailoring sustainable compounds using eggshell membrane as biobased epoxy catalyst

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Barros, Janetty Jany Pereira¹  Jaques, Nichollas Guimarães¹  Silva, Ingridy Dayane dos Santos¹  Albuquerque, Ananda Karoline Camelo de¹  Araújo, Amanda Meneses²  Wellen, Renate Maria Ramos¹ 

[1] Universidade Federal de Campina Grande;Universidade Federal da Paraíba

关键词: curing;    eggshell membrane;    epoxy;    kinetics;   

DOI  :  10.1590/0104-1428.20210088

学科分类：社会科学、人文和艺术（综合）

来源: Brazilian Academy Of Neurology

【 摘 要 】

In this work eggshell membrane was added as biobased curing catalyst to epoxy (DGEBA), for comparison purposes the synthetic catalyst DEH 35 data was reported, the curing of compounds was followed through differential scanning calorimetry (DSC) under dynamic conditions and their kinetics were modeled using Kissinger, Friedman, Friedman model based and Málek approaches. From evaluated Ea and ln A two steps of curing were verified, for the synthetic catalyst compound (S5) Ea abruptly increased for the degree of conversion α0.7 the opposite trend was observed for the eggshell membrane compound (M10). It is supposed for S5 Ea increases due to the competitive reactions leading to viscosity increase until reach the solid phase with decrease of the reactive groups availability, hampering the cross-linking, whereas for M10 Ea decreases at α0.7, hence invalidating the Kissinger model which assumes constant Ea.

【 授权许可】

CC BY