文献类型：期刊文献

英文题名：Changes in Surface Properties of Heat-Treated Phyllostachys Pubescens Bamboo

作者：Zhang, Yamei[1] Yu, Wenji[1]

第一作者：张亚梅

机构：[1] Key Laboratory of Wood Science and Technology of State Forestry Administration, Research Institute of Wood Industry, Chinese Academy of Forestry, Xiang Shan Road, Haidian District, Beijing, China

年份：2015

卷号：10

期号：4

起止页码：6809-6818

外文期刊名：BioResources

收录：EI(收录号：20212410514350);Scopus(收录号：2-s2.0-84965164009)

语种：英文

外文关键词：Bamboo - Amides - Free energy - Van der Waals forces - Surface treatment - Heat treatment - Surface analysis - Wetting

摘要：The wetting phenomena and surface energetic behavior in heat-treated bamboo were studied. The bamboo specimens were heat-treated at temperatures of 100, 140, and 180 °C for 4 h, and an untreated sample served as a control. The sessile drop technique was used to estimate the surface contact angles of the control and heat-treated bamboo samples. The contact angle data were then used to determine the surface free energies using the Lifshitz-van der Waals/acid-based approach. The results revealed that the heat treatment process affects surface wettability. Heat treatment at 100 to 180 °C increased the contact angle of distilled water and formamide, but heat treatment did not cause any increase in the contact angle of diiodomethane. The hydrophobic characteristics of the bamboo surfaces also increased under heat treatment, and the surface free energy and the polarity of the bamboo decreased. Surface analysis by XPS of the samples heat-treated at 180 °C showed a decreased O/C ratio and increased C1 peak, indicating that more lignin and extractives were situated on the bamboo surface. Changes in wettability can greatly impact the use of the material, particularly with respect to the adhesion of paints and coatings. ? **