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Properties of Thermally Treated Beech Wood at Different Scale Levels

첫 페이지 보기
  • 발행기관
    강원대학교 산림과학연구소 바로가기
  • 간행물
    강원대학교 산림과학연구소 학술대회 바로가기
  • 통권
    2022 International symposium of Institute of Forest Science for the 40th Anniversary of College of Forest and Environment Science (2022.10)바로가기
  • 페이지
    pp.75-75
  • 저자
    Rastislav Lagana, Tomas Andor
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A450449

원문정보

초록

영어
The study points to the effect of thermal modification on beech wood at various structure levels. Three temperature levels at temperatures of 160, 180, and 200 ° C were chosen. The duration of treatment was 1,5 and 3 hours, respectively. Selected properties were observed. At the nano-scale level, the DMT modulus of elasticity and adhesion were obtained using the atomic force microscope. Density and dynamic modulus of elasticity, strength, and modulus of elasticity were determined in clear wood loaded in compression and tension parallel to the grain, bending, and torsion. Structural-size timber treated at 190 °C for 3,5 hours was tested in bending according to EN 408. AFM showed that the structure of cell wall layers did not change after heat treatment. An increase in the DMT modulus of the compound middle lamella was observed after heat treatment. The adhesion of cell wall layers was not affected by thermal treatment. Density changes without practical implications. The dynamic modulus of elasticity given by the acoustic method was a good indicator for clear wood sorting before thermal treatment. Compression strength increased. Bending strength, tension strength, and torsion strength decreased in ascending order. A decrease of 20 % was observed in the average bending strength of structural wood. The 5th percentile of bending strength decreased 66 % from 58.9 MPa to 15,63 MPa. Interestingly, the 95th percentile of treated beech wood increased by 14 %, showing high-quality boards acting oppositely. Thermally treated wood behaves differently at each scale level depending on the type of loading mode. It is unique material compared to untreated wood and knowledge about its properties is essential for its utilization and design of biomimetic mechanisms into new wood products.

키워드

AFM strength modulus of elasticity cell wall structural timber beech wood

저자

  • Rastislav Lagana [ Department of Wood Science, Faculty of Wood Science and Technologies, Technical University in Zvolen, TG Masaryka 24 Zvolen 96001, Slovakia ] Corresponding Author
  • Tomas Andor [ Department of Wood Science, Faculty of Wood Science and Technologies, Technical University in Zvolen, TG Masaryka 24 Zvolen 96001, Slovakia ]

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    강원대학교 산림과학연구소 [Institute of Forest Science Kangwon National University]
  • 설립연도
    1975
  • 분야
    농수해양>임학
  • 소개
    강원대학교부설산림과학연구소(이하 “연구소”라 한다)는 산림에 관한 제반 학술적 연구를 통하여 산림자원의 효용을 밝히고 임업 및 임산업의 발전에 기여함을 목적으로 한다.

간행물

  • 간행물명
    강원대학교 산림과학연구소 학술대회
  • 간기
    부정기
  • 수록기간
    2017~2024
  • 십진분류
    KDC 526 DDC 634

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