文献类型：期刊文献

英文题名：Comparison of changes in micropores and mesopores in the wood cell walls of sapwood and heartwood

作者：Yin, Jiangping[1,2] Song, Kunlin[1,3] Lu, Yun[1] Zhao, Guangjie[2] Yin, Yafang[1]

第一作者：Yin, Jiangping

通信作者：Yin, YF[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Wood Anat & Utilizat Dept, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, Coll Mat Sci & Technol, Beijing 100083, Peoples R China;[3]Louisiana State Univ, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA

年份：2015

卷号：49

期号：5

起止页码：987-1001

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20152400940179);Scopus(收录号：2-s2.0-84938740227);WOS:【SCI-EXPANDED(收录号:WOS:000359383200008)】；

基金：This work was supported financially by the Chinese National Natural Science Foundation (No. 31370559 and No. 30972303). We would like to express our gratitude for the assistance on nitrogen adsorption testing given by Mr. Junbo Shang from the College of Materials Science and Technology, Beijing Forestry University, and for assistance with the sample preparation provided by Mrs. Mingkun Xu and Ph.D student Lichao Jiao at the Research Institute of Wood Industry, Chinese Academy of Forestry. We also like to acknowledge the assistance with language editing done by Kevin Austin of BizTech English AB.

语种：英文

外文关键词：Density functional theory - Gas adsorption - Hysteresis - Hysteresis loops - Microporosity - Pore size - Size distribution - Specific surface area - Wood preservation

摘要：The objective of this paper was to investigate size distribution of micropores and mesopores within the wood cell walls between sapwood and heartwood by using nitrogen adsorption method and to find out implications for the biological durability and further processing such as in drying and preservation treatment. The pore shape, specific surface area and pore size distribution of Chinese fir (Cunninghamia lanceolata) were evaluated using the hysteresis loops, Brunauer-Emmett-Teller (BET) and density functional theories, respectively. Both the sapwood and heartwood exhibited slit-shaped pores with regard to the H3 type of hysteresis loop of the isotherm. However, more mesopores were found in the sapwood, while the micropores increased with a decrease in mesopores in the heartwood. Furthermore, the earlywood and latewood in the sapwood had a higher BET-specific surface area (2.088 and 1.255 m(2) g(-1), respectively) compared with the earlywood (1.058 m(2) g(-1)) and latewood (0.787 m(2) g(-1)) in the heartwood. This could be caused by an increase in depositions in the extractive that partly filled the mesopores of the heartwood cell walls during the transformation from the sapwood. Additionally, a larger amount of mesopores existed in the earlywood in comparison with the latewood in the sapwood. However, there was no significant difference in the amounts of the micropores and mesopores, when comparing the earlywood with the latewood in the heartwood.