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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Effect of the Number of Passes through Grinder on the Pore Characteristics of Nanofibrillated Cellulose Mat

그라인딩 처리 횟수에 따른 나노피브릴화 셀룰로오스 매트의 공극 특성

  • Sim, Kyujeong (Dept. of Forest Sciences, Seoul National University) ;
  • Ryu, Jaeho (Dept. of Forest Sciences, Seoul National University) ;
  • Youn, Hye Jung (Dept. of Forest Sciences, Seoul National University)
  • 심규정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 류재호 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2013.01.29
  • Accepted : 2013.02.08
  • Published : 2013.02.28
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Abstract

In this study, we investigated the effect of the number of passes through agrinder on the pore characteristics of nanofibrillated cellulose (NFC) mat. The beaten pulp suspension was used to make NFC suspension using a grinder. To evaluate the pore characteristics of a NFC mat, the surface morphology of the dried NFC mat was observed with FE-SEM and the specific surface area was analyzed with BET nitrogen gas adsorption. The structure of NFC mat was changed with the different number of passes and drying methods. The specific surface area of NFC mat increased with the increase in the number of passes. The 20-passed NFC mat had 20 times larger specific surface area ($141m^2/g$) compared to the 0-passed NFC mat. The specific surface area was strongly correlated with the average pore size in NFC mat. The average pore diameter in NFC mat was calculated from the gas sorption isotherms using BJH model. The value was 13 - 15 nm, indicating that the NFC mat had mesoporous structure.

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References

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