Application of Infrared Spectroscopy to Analyze the Degree of Substitution in Acetylated Wood Powder

초록

In biomass acetylation, the degree of substitution is important information that has traditionally been measured via titration. In this study, infrared (IR) spectroscopy was conducted to simplify the degree of substitution measurement. Principal component analysis (PCA) was performed using the information obtained from the IR spectrum to confirm the classification characteristics of the sample according to the degree of acetylation. It was confirmed that the main components affecting the classification were peaks at 1740, 1365, and 1220 cm-1. Therefore, as a result of creating a formula for calculating the degree of substitution based on these peaks, the formula based on the hydroxyl group showed higher accuracy than that based on the methylene group, and the peaks derived from acetyl groups at 1365 and 1220 cm-1 showed higher accuracy. Therefore, substitution degree analysis using IR in acetylation of wood powder is possible and yields high accuracy. © 2022 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

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