Mechanism of Lignin Adsorption/Reprecipitation on Auto-catalyzed Ethanol Pulp Fibers Using XPS and AFM

摘要：

AFM and XPS were used to reveal the lignin distribution and morphology on the fiber surface of ethanol wheat straw pulp.The results show that lignin particles completely collect on the un-washed fiber surface and become less and small in pulping process,whereas,the fiber surface is observed to be fibrillar after four-stage washing while still lignin particles.It is found that lignin particles on the fiber surface looks like globule due to the interaction between iignin molecules.XPS analyses show there is lignin on fiber surface based on the measurement that O/C ratio is higher than the theoretical O/C ratio of cellulose and close to the theoretical O/C ratio of lignin.High kappa number suggests that the precipitation of the dissolved lignin from the pulping liquor occurs.

关键词： Ethanol pulping lignin precipitation AFM XPS wheat straw

作者: XU YONGJIAN ZHANG MEIYUN LI KECHENG

作者单位: Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper,College of Papermaking Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper,College of Papermaking

会议类型: 国际会议

会议名称: 第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)

会议地点: 天津

会议语种:英文

页码: 228-232

在线出版日期: 2008-05-14（万方平台首次上网日期，不代表论文的发表时间）