Degradation of coconut fiber immersed in cement and NaOH alkaline solutions

Revista Brasileira de Engenharia Agrícola e Ambiental

Luzardo, Francisco H. M.¹  Fornari Junior, Celso C. M.¹  Silva, Everton J. da²  Velasco, Fermin G.¹  Marques, Maria L.² 

[1] Universidade Estadual de Santa Cruz, Ilhéus, BR;Instituo Federal de Educação, Ciência e Tecnologia da Bahia, Eunápolis, BR

关键词:  degradability;    natural fibers;    cement matrixIntroduçãoAs fibras naturais existem em abundância e têm seu uso motivado por serem renováveis e pela sua disponibilidade a baixo custo;   

DOI  :  10.1590/1807-1929/agriambi.v19n10p981-988

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

This paper aims to analyse the effects of alkaline aqueous solutions on coconut fiber as a function of time. The process intended to simulate the conditions of degradation that occurs in the coconut fibers embedded in cementitious matrix. The fibers inserted in alkaline solutions with different concentrations were analysed by gravimetric, scanning electron microscopy and Fourier Transform Infrared spectroscopy (FTIR) methods. Alternative solutions have been studied by the technique of measuring UV–vis spectroscopy, during the second half of 2013. According to the increasing concentration of solutions and the time of contact with coconut fibers, a greater fiber surface modification occurred, by removal of surface constituents, such as cuticles, globular particles, pits and also lignin.

【 授权许可】

Unknown