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2025 Vol.57, Issue 1 Preview Page

Research Article

Effect of Thermal Conductivity of Heating Roll on Gas Grafting of Paper by Palmitoyl Chloride

압착가열 롤의 열전도율이 염화팔미토일과 종이의 기상 그라프트 반응에 미치는 영향

Ha Un You1
,
Kyoung-Hwa Choi2
,
Kwang Seob Lee2
,
Jeong-Yong Ryu3†
유 하운1
,
최 경화2
,
이 광섭2
,
류 정용3†
1Department of Paper Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University
2Changgang Institute of Paper Science and Technology, Kangwon National University
3Dept. of Paper Science & Engineering, Division of Wood & Paper Science, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon, Republic of Korea
1강원대학교 산림환경과학대학 제지공학과 대학원생
2강원대학교 창강제지기술연구소 연구교수
3강원대학교 산림환경과학대학 목재종이과학부 종이소재과학전공 교수
†Corresponding author: E-Mail: jyryu@kangown.ac.kr (Address: Dept. of Paper Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon, 200701, Republic of Korea)
28 February 2025. pp. 85-93
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Abstract

Through the gas grafting reaction of palmitoyl chloride, the hydroxyl groups in the pulp fibers can be replaced with alkyl chains, thereby imparting water resistance to the paper. During the gas graft reaction of palmitoyl chloride through hot pressing, it is essential to ensure sufficient heat transfer from the heating roll to the paper before the evaporated palmitoyl chloride dissipates. Therefore, it was expected that a heating roll with higher thermal conductivity would be beneficial for increasing the grafting efficiency. Copper or graphite plates have higher thermal conductivity than the previously used aluminum oxide plates. This study investigated whether using copper and graphite as pressing plates during hot pressing could improve the grafting efficiency of palmitoyl chloride by increasing thermal conductivity of hot press. However, in the case of copper plates, the thermal conductivity decreased due to the formation of copper chloride as a side reaction with hydrochloric acid, and the grafting efficiency was not improved. The graphite plates used in this study were too thick, leading to low heat capacity, which prevented any improvement in grafting efficiency by increasing the thermal conductivity of the heating surface. Further research is needed to find heating roll materials with high thermal conductivity to enable faster grafting of paper and fatty acid chloride.

Keywords
Hot pressing
gas grafting
palmitoyl chloride
thermal conductivity
copper
graphite
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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 57
  • No :1
  • Pages :85-93
  • Received Date : 2025-02-03
  • Revised Date : 2025-02-14
  • Accepted Date : 2025-02-14
  • DOI :https://doi.org/10.7584/JKTAPPI.2025.2.57.1.85
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