1. Key Laboratory of Bio-Based Material Science and Technology, Ministry of Education, Material Science and Engineering College, Northeast Forestry University, No. 26 Hexing Road, Xiangfang District, Harbin 150040, P. R. China
2. Department of Mechanical Engineering, University of North Texas, 3940 N. Elm St., Denton, TX, 76207, USA
3. College of Materials Science and Engineering, Nanjing Forestry University, No. 159 Longpan Road, Xuanwu District, Nanjing 210037, P. R. China