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

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Preparation of Cross-sectional Specimen for High Resolution Observation of Coating Structure and Visualization of Styrene/butadiene Latex Binder

고배율 도공층 구조 및 S/B latex 분포 분석을 위한 도공층 횡단면 제작

  • Kim, Chae-Hoon (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Youn, Hye-Jung (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University) ;
  • Lee, Hak-Lae (Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University)
  • 김채훈 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이학래 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2012.06.27
  • Accepted : 2012.07.20
  • Published : 2012.08.30
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Abstract

To characterize the coating structure, diverse methods such as mercury intrusion, nitrogen adsorption and oil absorption methods have been developed and widely employed. These indirect techniques, however, have some limitation to explain the actual coating structure. Recently microscopic observation methods have been tried for analyzing structural characteristics of coating layers. Preparation of the undamaged cross section of a coating layer is essential for obtaining high quality image for analysis. In this study, distortion-free cross-section of the coating layer was prepared using a grinding and polishing technique. The coated paper was embedded in epoxy resin and cured. After curing the resin block it was ground with abrasive papers and then polished with diamond particle suspension and nylon cloth. Polished coating layer was sufficient enough to obtain undamaged cross sectional images with scanning electron microscope under backscattered electron image mode. In addition, the SEM images allowed distinction of the coating layer components. Also S/B latex film formed between pigment particles was visualized by osmium tetroxide staining. Pore size distribution and pore orientation were evaluated by image analysis from SEM cross-sectional images.

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References

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