A Physico-chemical Change of Dissolving Pulp by Dry Milling and Fractionation

건식분쇄와 분급에 의한 용해용 펄프의 특성변화

  • 김태영 (한국조폐공사 기술연구원) ;
  • 이송민 (한국조폐공사 기술연구원) ;
  • 허용대 (한국조폐공사 기술연구원) ;
  • 김진영 (한국조폐공사 기술연구원) ;
  • 정양진 (한국조폐공사 기술연구원)
  • Received : 2015.08.18
  • Accepted : 2015.10.04
  • Published : 2015.10.30


In this study, chemical and physical changes of dissolving pulps which have similar viscosity by dry milling and fractionation were investigated. We used two types of dissolving pulp made from wood and cotton linter fiber, respectively. Dry milling was executed by knife cutter and pulp powders were fractionated by sieve shaker into 4 grades. We analyzed fiber properties, crystallinity index, viscosity, molecular weight of pulp sheet and powders. It was found that poly-dispersity index of cotton linter pulp was smaller than that of wood pulp, meaning that cotton pulp has more narrow molecular weight distribution. It was assumed that these were related to exposure times to chemical treatment which cut cellulose chains not evenly. At least 4 times of chemical treatments for wood pulp were executed and only two times of chemical treatments for cotton linter pulp were done. After dry milling average molecular weight and crystallinity index of cotton linter pulp powders were reduced and these were related to fines content and shape of pulp powders.



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