Journal
HOLZFORSCHUNG
Volume 76, Issue 7, Pages 658-667Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/hf-2021-0242
Keywords
epoxy resin; lignin; optical transmittance; Populus deltoides; thickness dependency; transparent wood composite
Categories
Funding
- Indian Council of Forestry Research and Education, Dehradun [IWST/WSP/XI/174]
- DST, New Delhi [DST/INSPIRE Fellowship/[IF190269]]
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This study prepared adjustable thickness transparent wood composites using bleaching and resin infiltration method, and investigated the effects of bleaching duration and sample thickness on their optical properties.
The revolutionary transformation of opaque wood into a transparent material, with combination of high optical transmittance and high haze, has gained widespread interest in the realms of advanced functional materials. However, the thickness of transparent wood composite (TWC) is limited to a few millimeters which restricts potential use. In this study, TWC were prepared using transverse sections of poplar (Populus deltoides) in thickness ranging from 1.5 to 15 mm by lignin modification bleaching followed by epoxy resin infiltration. The effects of bleaching duration as well as sample thickness on the optical properties of TWC were investigated. TWC was characterized using scanning electron microscopy and FTIR spectroscopy. The optical properties of TWC were measured using UV-VIS-NIR spectroscopy. The results indicated that light transmittance depended on severity of bleaching, lignin content and sample thickness.
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