Study of Puffing Cell Walls
Since wood is porous it also is a good heat and sound insulating material.Puffing the cell wall may lose certain level of mechanical properties but would increase its insulation properties.In this study,Trema orientalis wood was first treated with nitric acid aqueous solution to damage the S3 layer of cell walls,followed by puffing the cell wall inward with saturated urea and ZnCl2 solutions.Results indicated that treating Trema orientalis with 10％ nitric acid at 100 ℃ for 20 minute damaged the S3 layer of cell walls,and the subsequent treatment with urea and ZnCl2 saturated solutions caused the fiber tracheid walls to swell up to 76％.Then,the swollen material was dried with critical CO2 fluid to obtain puffed wood.SEM examinations of nitric acid-treated samples showed that lignin were removed from the S3 layer surfaces and S3 mirofibrils were ruptured causing the entire secondary walls to swell inward.
Trema orientalis cell wall swelling urea zinc chloride saturated solution
Jian Qiu Jeanran Gao Monlin Kuo Jian Li
College of Wood Science and Technology,Southwest Forestry University,Kunming,650224,China Department of Natural Resource Ecology & Management,Iowa State University,Ames,Iowa 50011-3221,USA Key Laboratory of Bio-Based Material Science and technology,Northeast Forestry University Harbin,150
国际会议
哈尔滨
英文
239-242
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）