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Title: X-ray computed tomography of wood-adhesive bondlines: Attenuation and phase-contrast effects

Journal Article · · Wood Science and Technology
 [1];  [1];  [2]
  1. Oregon State Univ., Corvallis, OR (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
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Microscale X-ray computed tomography (XCT) is discussed as a technique for identifying 3D adhesive distribution in wood-adhesive bondlines. Visualization and material segmentation of the adhesives from the surrounding cellular structures require sufficient gray-scale contrast in the reconstructed XCT data. Commercial wood-adhesive polymers have similar chemical characteristics and density to wood cell wall polymers and therefore do not provide good XCT attenuation contrast in their native form. Here, three different adhesive types, namely phenol formaldehyde, polymeric diphenylmethane diisocyanate, and a hybrid polyvinyl acetate, are tagged with iodine such that they yield sufficient X-ray attenuation contrast. However, phase-contrast effects at material edges complicate image quality and segmentation in XCT data reconstructed with conventional filtered backprojection absorption contrast algorithms. A quantitative phase retrieval algorithm, which isolates and removes the phase-contrast effect, was demonstrated. The paper discusses and illustrates the balance between material X-ray attenuation and phase-contrast effects in all quantitative XCT analyses of wood-adhesive bondlines.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1246348
Journal Information:
Wood Science and Technology, Vol. 49, Issue 6; ISSN 0043-7719
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (6)

Numerical simulation of pressure-driven adhesive penetration into realistic wood structures journal July 2018
Methodology for comparing wood adhesive bond load transfer using digital volume correlation journal September 2018
X-ray methods to observe and quantify adhesive penetration into wood journal August 2018
Multi-Scale Evaluation of the Effect of Phenol Formaldehyde Resin Impregnation on the Dimensional Stability and Mechanical Properties of Pinus Massoniana Lamb. journal July 2019
Effect of Phenol Formaldehyde Resin Penetration on the Quasi-Static and Dynamic Mechanics of Wood Cell Walls Using Nanoindentation journal October 2019
Bio-Based Adhesives and Evaluation for Wood Composites Application journal February 2017

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Related Subjects

36 MATERIALS SCIENCE
wood-composites
attenuation coefficient
phase retrieval
phase-contrast
wood-adhesives
x-ray computed tomography
x-ray contrast