化学
木质素
红外光谱学
傅里叶变换红外光谱
摩尔分数
环己酮
二甲基亚砜
分数(化学)
有机化学
吸收(声学)
氧气
碳纤维
物理化学
催化作用
材料科学
复合数
物理
量子力学
复合材料
作者
Eri Fumoto,Shinya Sato,Yuki Kawamata,Yoshihisa Koyama,Takuya Yoshikawa,Yuta Nakasaka,Teruoki Tago,Toshio Masuda
出处
期刊:Fuel
[Elsevier]
日期:2022-06-01
卷期号:318: 123530-123530
被引量:12
标识
DOI:10.1016/j.fuel.2022.123530
摘要
Carbonyl functional groups contained within lignin-derived fractions were examined using Fourier-transform infrared spectroscopy (FT-IR). The absorption of carbonyl in lignin-derived fractions with and without dimethyl sulfoxide-d6 (DMSO‑d6) was observed at 1707 cm−1. This absorption captured aliphatic ketones, aliphatic carboxylic acids, or aromatic esters because the absorption range of cyclohexanone, heptanoic acid, ethyl benzoate, and butyl benzoate with and without DMSO‑d6 is 1704–1721 cm−1. To estimate the amount of carbonyl in the lignin-derived fraction, DMSO‑d6 solutions of various model carbonyl compounds were analyzed by FT-IR. The FT-IR area ratios of these compounds to carbon-deuterium in DMSO‑d6 at 2250 cm−1 increased proportionally to their mole ratios. The carbonyl oxygen to carbon atomic ratio in the lignin-derived fraction was estimated to be 0.05, indicating that approximately 20% of oxygen in the lignin-derived fraction was from carbonyl functional groups.
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