核桃壳纤维素降解的FTIR特征

Degradation of Cellulose of Walnut Shell Based on FTIR Characteristics

以傅里叶红外光谱(FTIR)为分析手段,研究以苯酚为溶剂、酸催化条件下核桃壳纤维素降解过程中其主要化学基团特征随反应时间的变化。结果表明:上述过程虽然可以用液化来描述,但本质上是核桃壳纤维素的降解反应,纤维素分子链降解为低聚糖及葡萄糖等低分子物质,最终导致吡喃环开环。

By means of FTIR, the cellulose of walnut shell was liquefied and degraded under acid catalyst in the presence of phenol firstly. The variation of main chemical groups of liquefied and degraded products of cellulose as a function of reaction time based on FTIR characteristics was discussed in this paper. Results from ~q＇IR spectra showed, although the course of reaction could be described by liquefaction, the process was a degradation of cellulose essentially; cellulose was degraded to low molecular fragments such as oligosaccharides, and the pyranoid ring was broken at last.