Thermal, Crystallinity and Microstructure Characteristics of Chemical Modification on Sugarcane Bagasse Powder

Abstract

The aim of this study was to evaluate thermal stability, crystallinity index, functional group and morphological characteristics of SCB fiber on chemical modification using sodium hydroxide (NaOH) and 3-aminopropyltrimethoxysilane (3-APS) treatment. The thermal stability, crystallinity index, functional group and morphological characteristics are analyzed using thermogravimetry analysis (TGA), x-ray diffraction (XRD) and scanning electron microscope (SEM) respectively. As a result, untreated SCB fiber, the thermal and crystallinity of chemical modification using NaOH and 3-APS silane on SCB showed the improvement. However, the 3-APS silane has better thermal stability and higher crystallinity index compare NaOH treatment. The thermal degradation of cellulose and lignin for 3-APS silane SCB fiber have increased by 31.17 °C compare to NaOH by 25.03 °C. Moreover, the crystallinity of silane fiber increases by 1.27 % compared to the NaOH only 1.12 %. From the morphology, the surface of untreated has impurity on the surface of SCB fiber. However, the NaOH treatment, the surface of SCB fiber become rough meanwhile the 3-APS silane SCB fiber, have smooth and cleaner surface.