Open Access

ARTICLE

Measurement and Analysis of Three-Dimensional Surface Topography of Sawn Timber Based on Scanning Probe Method

by Yuhang He¹, Rongzhuo Zhang¹, Sarah Mohrmann², Zheng Wang^1,*, Jiujin Fang³

1 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Technology, Nanjing Forestry University, Nanjing, 210037, China
2 College of Civil Engineering, Nanjing Forestry University, Nanjing, 210037, China
3 College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing, 210037, China

* Corresponding Author: Zheng Wang. Email:

(This article belongs to the Special Issue: Advanced Wood Composites from Renewable Materials)

Journal of Renewable Materials 2022, 10(12), 3303-3311. https://doi.org/10.32604/jrm.2022.020681

Received 06 December 2021; Accepted 18 January 2022; Issue published 14 July 2022

Abstract

In order to explore the characteristics of the three-dimensional surface morphology of sawn timber, a threedimensional wood surface morphology tester based on the scanning probe method and the principle of atomic force microscope was used to test the three-dimensional surface morphology of three kinds of sawn timber and calculate its surface roughness. This study also analyzed the reasonable plan for the value of wood surface roughness and the advantages of the three-dimensional shape tester, as well as the influence of tree species, three sections, air-dry density and other factors on the surface roughness of the specimen after mechanical processing. The results have shown that it is a more appropriate method to select the calculated values of S_a and S_q as the evaluation of the surface roughness of wood with random surface characteristics. The three-dimensional wood surface topography tester can efficiently, conveniently and accurately display the three-dimensional topography of wood at a micron-level resolution, and is characterized by high efficiency and good durability. The three-dimensional surface morphology characteristics of the three sawn woods correspond to their roughness. The surface roughness of woods is arranged as follows: Sitka spruce > Larch > Beech. For the same tree species, the roughness of the corresponding section after sawing is as follows: chordwise section > crosswise section > radial section. The radial section has lower roughness than the other surfaces. The surface roughness of the wood after sawing is mainly related to its air-dry density. The above is intended to provide a useful reference for the application of measuring and evaluating the surface roughness of sawn timber using the three-dimensional surface topography test method.

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