Surface Properties of Pine Scrimber Panels with Varying Density

Coatings

Jinguang Wei¹  Yahui Zhang¹  Wenji Yu¹  Qiuqin Lin¹  Chung-Yun Hse²  Todd Shupe³ 

[1] Scrimber Engineering and Technology Research Center of State Forestry Administration, Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China;Southern Research Station, USDA Forest Service, Pineville, LA 71360, USA;Wood Science Consulting, LLC., Baton Rouge, LA 70816, USA;

关键词: scrimber;    density;    wettability;    roughness;    SEM;    XPS;   

DOI  :  10.3390/coatings9060397

来源: DOAJ

【 摘 要 】

Coating quality for scrimber products against exterior conditions is largely dependent on the surface properties. The wettability, morphology, and chemical composition of pine scrimber surfaces were investigated to better understand the surface properties. The scrimber was found to be a hydrophilic material because the water contact angles were less than 90°. The panels with a density of 1.20 g/cm³ had the largest angle change rate (k = 0.212). As the panel density increased, the instantaneous contact angle of each test liquid (i.e., water, formamide, and diiodomethane) on the panels decreased, and so did surface free energy. Panels with higher density showed lower surface roughness. Surface roughness across the wood grain was greater than that along the grain. SEM observations showed the high-density panels had a smoother surface with fewer irregular grooves in comparison with the low-density panels. X-ray photoelectron spectroscopy (XPS) analysis indicated that more unoxygenated groups appeared on the surface of high-density panels.

【 授权许可】

Unknown