Sangian H., Pangau J., Tamuntuan G., Zulnazri Z., 2018, The Structural Analysis of the Lignocellulose, Champaca Timber (Elmerrilliaovalis) Modified by the Microwave, Chemical Engineering Transactions, 65, 229-234.
The present work aims to analyze the structural change of a biomass from champaca timber (Elmerrilliaovalis) pretreated by the microwave. The treated substrates were analyzed employing XRD, FTIR, and SEM and compared with an original substrate (without pretreatment) and an acetylcellulose. The microwave was set its electrical power at 300 W; 40min., 300W; 10min., 1000W; 8min. Results showed that the pattern of XRD curves of the treated biomass significantly changed compared with that of native solid. The crystalline index (CrI) of an original substrate was of 0.60 and decreased to 0.36 for solid treated by the microwave 300W for 40min. When the microwave power increased to 1000W for 8min, the CrI value decreased to 0.12 that was relatively similar with an acetylcellulose. Meanwhile, the intensity of transmitted infrared wave increased for a microwave-treated substrate that was indicative many hydrogen bonds via hydroxyl groups were broken. SEM image showed that the surface morphology of microwave-treated substrate was completely transformed in which it was modified significantly and could increase the enzymatic hydrolysis of sugar production. While, structural surface of acetylcellulose was quite different if compared with the Elmerrilliaovalis substrates.
