펄프종이기술 (Journal of Korea Technical Association of The Pulp and Paper Industry)

한국펄프종이공학회 (Korea Technical Association of the Pulp and Paper Industry)
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열화율이 상이한 밀랍지의 초임계유체추출 탈랍처리효과 비교분석

Comparisons of Effectiveness of the Supercritical Fluid Extraction Dewaxing on the Beeswax-Treated Paper with Different Aging Degrees

  • 정혜영 (국립문화재연구소 복원기술연구실) ;
  • 강영석 (국립문화재연구소 복원기술연구실) ;
  • 고인희 (국립문화재연구소 복원기술연구실) ;
  • 양은정 (국립문화재연구소 복원기술연구실) ;
  • 최경화 (강원대학교 창강제지기술연구소)
  • Jeong, Hye Young (Research Division of Restoration Technology, National Research Institute of Cultural Heritage) ;
  • Kang, Young Suk (Research Division of Restoration Technology, National Research Institute of Cultural Heritage) ;
  • Go, In Hee (Research Division of Restoration Technology, National Research Institute of Cultural Heritage) ;
  • Yang, Eun Jeong (Research Division of Restoration Technology, National Research Institute of Cultural Heritage) ;
  • Choi, Kyoung Hwa (Changgang Institute of Paper Science and Technology, Kangwon National University)
  • 투고 : 2014.12.09
  • 심사 : 2014.12.20
  • 발행 : 2014.12.30
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초록

This study aims to investigate the applicability of supercritical fluid extraction as a dewaxing technique to restore the beeswax-treated volume of the Annals of the Joseon Dynasty in various deterioration and damage conditions. Thus, this study analyzed the dewaxing efficiency and changes in physical and morphological properties before and after dewaxing, by applying the optimal supercritical fluid extraction dewaxing condition ($70^{\circ}C$, 40 MPa, $CO_2$, Co-solvent 20% DCM, 2 hour) to 3 kinds of beeswax-treated paper with different deterioration rates (dry artificial aging of 10, 20 and 30 days at $120^{\circ}C$). After dry artificial aging at $120^{\circ}C$ for 30 days, the average molecular weight of the beeswax-treated specimen was $1.856{\times}10^5g/mol$, showing deterioration about 80% of the beeswax-treated paper before dewaxing. It was a similar level to the molecular weight of the bees-waxed volume of the Annals of the Joseon Dynasty that has a higher degree of damage. As a result of analyzing the dewaxing efficiency through FT-IR analysis, this study discovered that it was possible to effectively dewax beeswax-treated paper in the range of deterioration 20 to 80% with this supercritical fluid extraction dewaxing technique applied. As a result of analyzing changes in the physical and morphological properties before and after dewaxing, the viscosity tended to decrease to a slight degree, and since no morphological deformation or damage of stencil fibers was found, it was concluded possible to conduct stable dewaxing through this supercritical fluid extraction technique.

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참고문헌

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