Effects of Alkaline Extraction on Micro /Nano Particles of Eucalyptus camaldulensis Biology
As the most planting tree species in South China, Eucalyptus camaldulensis wood has been main fiber materials for preparing degradable composite materials. However, wood extractives and hemicellulose were nearly complete dissolved out in preparation of the fiber, this would result in more serious water pollution and meanwhile bring a great waste of biological resources. Thereby, In order to find out the leaching rule of micro/nano particles from Eucalyptus camaldulensis wood, hence to obtain the way to lower the negative impact of the extractives and hemicellulose, the Eucalyptus camaldulensis wood was treated in alkaline solutions at room temperature and the extractives obtained was analyzed by Sizer. The results were following as: (1) Different alkali, its concentration and extraction time have a significant different influence on the particles leaching with the different diameters. And The KOH, NaOH, LiOH all had impacts on the volume fraction and number fraction of leached particles and the significance reduces in turn at the same other conditions. (2) The optimum concentration of KOH, NaOH and LiOH was 17.5%, 18.5% and 15.0% at room temperature, respectively. The optimum extraction time of the untreated samples was 20h, 24h, and 24h, respectively. The optimum extraction time of the pretreated samples was 16h, 16h and 12h, respectively.
QI Hong-chen PENG Wan-xi WU Yi-qiang WU Shu-bin XU Gan-jun
College of Materials Science and Engineering, Central South University of Forestry and Technology, C College of Materials Science and Engineering, Central South University of Forestry and Technology, C State Key of Pulp and Paper Engineering, South China University of Technology, China
国际会议
桂林
英文
1-5
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）