Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Drying Temperature and Acetylation on The Retention of Polyethylene Glycol in Red Pine Wood Disks

건조온도와 아세틸화처리가 소나무 원판의 Polyethylene Glycol 잔류량에 미치는 효과

  • Lee, Won-Hee (Department of Wood Science and Technology, Kyungpook National University) ;
  • Hong, Seung-Hyun (Department of Bio-based Materials, Chungnam National University) ;
  • Kang, Ho-Yang (Department of Bio-based Materials, Chungnam National University)
  • Received : 2015.07.04
  • Accepted : 2015.08.13
  • Published : 2015.11.25
Download PDF
⟨ Previous Next ⟩

Abstract

Polyethylene glycol (PEG) impregnation prevents a red pine disk from cross-sectional checking during drying. Percentage of PEG Retention (PPR) was measured by the experimental methods of aceton extraction and moisture conditioning in a saturated salt solution and the effect of acetylation on PEG impregnated wood was investigated. PPRs of the kiln-dried specimens were much higher than those of the air-dried by at least four times and within the kiln-dried specimens those of the sapwood were higher that those of the heartwood by two times. These results were confirmed by the moisture conditioning experiment. Acetylation increased the weights of the kiln-dried specimens much less than those of the air-dried. It was revealed that acetic anhydride solution eluted PEG-1000 in the specimens. It is concluded that kiln-drying is more effective than air-drying for the increase of PPR and that acetylation eliminates the difference between the kiln- and air-dried specimens.

소나무 원판에 polyethylen glycol (PEG)를 주입시키면 건조 중 횡단면할렬을 막을 수 있다. 본 연구에서는 건조온도와 아세틸화처리가 PEG처리 목재에 미치는 효과를 조사하고자 다양한 온도에서 건조한 소나무 원판의 PEG잔류율(PPR)을 아세톤추출과 조습처리를 통해 측정하였다. 아세톤추출법으로 구한 PPR은 열기건조시편이 천연건조시편보다 최하 4배 높았으며, 열기건조시편은 변재의 잔류PEG율이 심재보다 2배 정도 높았다. 이러한 결과는 조습처리실험을 통해 검증되었다. 아세틸화처리에 의한 열기건조시편의 중량변화율(WPC)은 천연건조시편 보다 훨씬 적게 증가하거나 오히려 감소하였다. 무수초산이 잔류 PEG를 용출시켰기 때문으로 밝혀졌다. 따라서 PPR을 높이려면 열기건조하는 것이 천연건조보다 유리하나 아세틸화처리는 대부분의 PEG를 용출시켜 천연건조와 차이를 나타내지 않는다.

Keywords

References

  1. Alma, M.H., Hafizoglu, H., Maldas, D. 1996. Dimensional stability of several wood species treated with vinyl monimers and polyethylene glycol-1000. International Journal of Polymer Material 32: 93-99. https://doi.org/10.1080/00914039608029385
  2. Bjurhager, I., Ljungdahl, J., Wallstro, L. 2010. Towards improved understanding of PEG-impregnated waterlogged archaeological wood: A model study on recent oak. Holzforschung 64(2): 243-250. https://doi.org/10.1515/HF.2010.024
  3. Bryne, L.E., Waelinder, M.E.P. 2010. Ageing of modified wood. Part 1: Wetting properties of acetylated, furfurylated, and thermally modified wood. Holzforschung 64(3): 295-304. https://doi.org/10.1515/HF.2010.040
  4. Dunningham, E.A. 2012. Kinetic studies of the acetylation reaction of small Pinus radiata blocks. Eur. J. Wood Prod. 70(6): 857-863. https://doi.org/10.1007/s00107-012-0632-9
  5. Futemma, Y., Obataya, E. 2012. Non-uniform reaction of solid wood in vapor-phase acetylation. Journal of Wood Science 58(4): 336-341. https://doi.org/10.1007/s10086-012-1255-9
  6. Han, G.-S., Cho, N.-S. 1996. Dimensional change of acetylated softwood. Journal of the Korean Wood Science and Technology 24(4): 4040-4046.
  7. Hoadley, R.B. 2000. Understanding Wood. The Taunton Press, Inc., CT, USA: pp. 288.
  8. Hong, S.-H., Kim, C.-H., Lim, H.-M., Kang, H.-Y. 2013. Measuring PEG Retentions and EMCs of PEG Impregnated Softwood Specimens after Heat-treatment. Journal of the Korean Wood Science and Technology 41(3): 173-180. https://doi.org/10.5658/WOOD.2013.41.3.173
  9. Jeremic, D., Cooper, P. 2009. PEG quantification and examination of molecular weight distribution in wood cell walls. Wood Science and Technology 43(3-4): 317-329. https://doi.org/10.1007/s00226-008-0233-2
  10. Kang, H.-Y., Lee, K.-Y. 1997. Effect of acetylation on ultrasonic velocity of bamboo. Journal of the Korean Wood Science and Technology 25(3): 8-15.
  11. Loughborough, W.K. 1948. Chemical seasoning: Its effectiveness and present status. U.S. Forest services Forest Products Laboratory Report, D1721.
  12. Mackay, J.F.G. 1972. The cnnurrence, development and control of checking in Tasmanian Eucalyptus obliqua, Holzforshung 26(4): 121-124. https://doi.org/10.1515/hfsg.1972.26.4.121
  13. Morozovs, A., Buksans, E. 2009. Fire performance characteristics of acetylated ash (Fraxinus excelsior L.) wood. Wood Material Science & Engineering 4(1-2): 76-79. https://doi.org/10.1080/17480270903315580
  14. Mueller, U., Steiner, M. 2010. Colour stabilisation of wood composites using polyethylene glycol and melamine resin. Eur. J. Wood Prod. 68(4): 435-443. https://doi.org/10.1007/s00107-009-0386-1
  15. Ralph, J. 2006. PEG penetration and the effects of PEG pretreatment in air-dried Eucalyptus regnans. Wood and Fiber Science 38(1): 139-143.
  16. Ralph, J., Edwards, S.J. 2004. PEG penetration in three commercially important Tsmanian Eucalypts. Wood and Fiber Science 36(4): 611-619.
  17. Rowell, R.M., Ibach, R.E., McSweeny, J., Nilsson, T. 2009. Understanding decay resistance, dimensional stability and strength changes in heat-treated and acetylated wood. Wood Material Science & Engineering 4(1-2): 14-22. https://doi.org/10.1080/17480270903261339
  18. Rowell, R.M., Ibach, R.E., McSweeny, J., Nilsson, T. 2009. Understanding decay resistance, dimensional stability and strength changes in heat-treated and acetylated wood. Wood Material Science & Engineering 4(1-2): 14-22. https://doi.org/10.1080/17480270903261339
  19. Rowell, R.M., Simonson, R., Hess, S., Plackett, D.V., Cronshaw, D., Dunningham, E. 1994. Acetyl distribution in acetylated whole wood and reactivity of isolated wood cell-wall components to acetic anhydride. Wood and Fiber Science 26(1): 11-18.
  20. Stamm, A.J. 1959. Effect of polyethylene glycol on the dimensional stabilization of wood. Forest Products Journal 9(10): 375-381.
  21. Stamm, A.J. 1964. Wood and Cellulose Science. The Ronald Press Company, New York.
  22. Wallstrom, L., Lindberg, K.A.H. 1995. Wood surface stabilization with polyethyleneglycol, PEG. Wood Science and Technology 29: 109-120.
  23. Yamaguchi, T., Ishimaru, Y., Urakami, H. 1999. Effect of temperature on dimensional stability of wood with polyethylene glycol II: Temperature dependence of PEG adsorption and mechanical properties of treated wood. Mokuzai Gakkaishi 45(6): 441-447.