摘要
以废弃姜秆为原料,采用氢氧化钾(KOH)法提取姜秆中的纤维素。通过正交实验确定纤维素的最佳提取条件:KOH浓度14%,蒸煮时间5h,液料比20,此时得到的纤维素纯度最高。通过XPS、SEM、FTIR、TGA、XRD对姜秆及得到的纤维素样品进行表征。样品的颜色由棕色变为白色,FTIR谱图中半纤维素和木质素的特征峰消失,热分解温度从225℃提高到317℃,表明提取后得到的样品热稳定性明显提高。
With abandoned ginger stalk as raw material, its cellulose was extracted by potassium hydroxide treatment. The highest purity cellulose obtained when the KOH concentration 14wt%, extraction time 5h and liquid - solid ratio 20, which were determined by orthogonal experiment. Then characterized by XPS, SEM, FTIR, TGA and XRD. Brown color of the sample changed to white. As shown in FFIR spectra, the hemicellulose and lignin peaks disappeared after extraction. Thermal decomposition temperature increased from 225 ℃ to 317 ℃, the thermal stability had been improved significantly.
出处
《造纸科学与技术》
2016年第6期23-27,共5页
Paper Science & Technology
基金
国家自然科学基金项目(21576146
21406126)
国家973基础研究发展计划项目(2014CB460610)
山东省高校科技发展项目(J14LC11)
关键词
废弃姜秆
氢氧化钾
纤维素
热稳定性
abandoned ginger stalk
KOH
cellulose
thermal stability
