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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

  • Received : 2015.07.04
  • Accepted : 2015.08.13
  • Published : 2015.11.25

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.

Keywords

Pinus densiflora;Polyethylen glycol;acetylation;Percentage of PEG Retention;Weight Percentage Change;aceton extraction

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Acknowledgement

Supported by : 산림청