Impact of Pressure on Preservative Permeability in Bamboo
He Ying1,2, Wen Xuwen1,2, Wang Hankun1,2, Zhang Rong1,2, Qin Daochun1,2
1. International Centre for Bamboo and Rattan, Beijing 100102, China; 2. Key Laboratory of Bamboo and Rattan Science and Technology, National Forestry and Grassland Administration, Beijing 100102, China
Abstract：Fine rectangular bamboo strips sold in market were used in study to analyze the permeability and interception of preservatives in bamboo by using Preservative Toluidine CuSO4 combined with blue stain. The results showed that with the increase of pressure, the time needed for stain to permeate decreased remarkably, and the permeating velocity increased. The relationship between pressure and permeating velocity was in accord with Poiseuille formula. Stain permeating was prevented in bamboo specimens when the pressure was within the range of 0.2 and 0.4 MPa and the solution became almost achromatous at the outflow end of specimens. During permeating, the stain in vascular bundles faded earlier in the outer part than that in inner part of bamboo culm wall. The pressure had significantly impact on Cu content at the first 0.5 m of pressurized end. With the increase of distance from pressurized end, the decrease ratio of Cu content was high at the beginning and then became less and decreased exponentially. It can concluded that pressure could increase the permeating efficiency of preservatives, the regulation of pressure could promote the horizontal permeability and interception of preservatives in bamboo, and the permeability effect would decrease with the increasing permeability distance.
何莹, 温旭雯, 王汉坤, 张融, 覃道春. 压力对竹材中防腐剂渗透性影响的初步研究[J]. 世界竹藤通讯, 2018, 16(4): 5-9.
He Ying, Wen Xuwen, Wang Hankun, Zhang Rong, Qin Daochun. Impact of Pressure on Preservative Permeability in Bamboo. World Bamboo and Rattan, 2018, 16(4): 5-9.
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