Division of Advanced Materials Engineering, Dong-Eui University, Busanjin-gu, Busan 47340, Korea
동의대학교 신소재공학부
Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.
In this study, wood, which is indestructible and has flexible, and transparent properties, was developed. A flexible and transparent wooden panel was fabricated by removing lignin (delignification) that absorbs light in the visible light region and filling the lignin-removed space with a mixture of polyvinyl alcohol (PVA), which provides transparency, and a low molecular weight compound, which provides flexibility. The delignification process, the infiltration of the polymer mixture, the internal structures, the optical transmittance, and the flexibility of the wood samples were measured and investigated. The analyzed results showed high optical transmittance of 65.8% at 550 nm wavelength when impregnated only with PVA, while the transmittance decreased to around 10% as the mixed amount of low-molecular compounds increased, but the flexibility was greatly improved. Based on these results, it is considered that higher flexible and transparent wood will be a useful material to replace fragile glass material in the future.
본 연구는 쉽게 깨지지 않고, 유연한 투명한 나무 패널 제조에 관한 것이다. 가시광 영역의 빛을 흡수하는 lignin을 제거(delignification)하고 그 공간에 투명성을 제공하는 polyvinyl alcohol(PVA)과 유연성을 제공하는 저분자 화합물을 혼합한 물질로 채워 유연하고 투명한 나무패널을 제조하였다. Delignification 공정, 혼합고분자 함침, 나무패널의 내부구조, 광투과율, 그리고 유연성 등을 조사하였다. 분석결과로부터 PVA 물질만 함침된 투명나무는 550 nm wavelength에서 65.8%로 높은 광투과율을 보인 반면에, 저분자 화합물이 혼합된 투명나무는 그 양이 많을수록 광투과율은 10%대로 낮아졌지만, 유연성은 크게 향상되었다. 이러한 결과를 바탕으로 높은 유연성과 투명성을 지닌 목재가 향후 취약한 유리재료를 대체할 유용한 재료가 될 것으로 판단된다.
Keywords: transparent wood, flexibility, polyvinyl alcohol, lignin, cellulose.
2023; 47(2): 206-211
Published online Mar 25, 2023
Division of Advanced Materials Engineering, Dong-Eui University, Busanjin-gu, Busan 47340, Korea