1. College of Materials Science and Engineering, Key Laboratory of Polymer Materials and Products of Universities in Fujian, Fujian University of Technology, Fuzhou, Fujian 350002, P. R. China
2. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
3. Department of Wood and Forest Sciences, Laval University, Quebec G1V 0A6, Canada