FAN Yong-ming1, XU Ai-qing1, SHEN Yan-ni1, LI Ming-fei1, XIE Yi-min2, ZHANG Zhi-yi3
1. College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China;2. Shandong Key Laboratory of Pulp and Paper Engineering, Shandong Institute of Light Industry, Jinan 250100, China;3. Institute of Populus tomentosa, Beijing Forestry University, Beijing 100083, China