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

Taeyoung Kim; Songmin Lee; Yongdae Heo; Jinyoung Kim; Yangjin Joung

doi:10.7584/ktappi.2015.47.5.023

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A Physico-chemical Change of Dissolving Pulp by Dry Milling and Fractionation 건식분쇄와 분급에 의한 용해용 펄프의 특성변화

30 October 2015. pp. 23-32

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Abstract

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.

Keywords

Cellulose

fractionation

GPC

poly-dispersity index (PDI)

References

Literature Cited

RISI, World dissolving pulp monitor (2014.-Jan)

P. J. Wakelyn, N. R. Bertoniere, A. D. French, D. P. Thibodeaux, B. A. Triplett, M. A. Rousselle, W. R. Goynes Jr., J. V. Edwards, L. Hunter, D. D. McAlister and G. R. Gamble, International Fiber Science and Technology SeriesCotton Fiber Chemistry and Technology, Boca Raton. CRC Press. (2007)

H. A. Krässig, Cellulose: Structure, Accessibility and Reactivity, Yverdon, Switzerland. Gordon and Breach Science Publishers. (1993)

J.-L. Wertz, O. Bédué and J. P. Mercier, Cellulose Science and Technology, Lausanne. EPFL press. (2010)

C. A. Hubbell and A. J. Ragauskas, Bioresource Technology, Effect of acid-chlorite de-lignification on cellulose degree of polymerization, 101; 7410-7415 (2010)10.1016/j.biortech.2010.04.029

A. Thygesten, J. Oddershede, H. Lilholt, A. Thomsen and K. Stahl, Cellulose, On the determination of crystallinity and cellulose content in plant fibres, 12; 563-576 (2005)10.1007/s10570-005-9001-8

A. Isogai, Advanced Technologies of Cellulose Utilization, Tokyo. CMC Publishing. (2008)

A. Lejeune and T. Deporez, Cellulose: Structure and Properties, Derivatives and Industrial Uses, New York. Nova Science Publishers. (2003)

E. Sjostrom, Chemistry, Fundamentals and Applications; 60, Orlando. Academic press. (1992)

T. F. Liebert, T. J. Heinze and K. J. Edgar, ACS Symposium Series 1033Cellulose Solvents; For Analysis, Shaping and Chemical Modification, Washington, DC. Ameican Chemical Society. (2009)

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 : 47
No :5
Pages :23-32
Received Date : 2015-08-18
Revised Date : 2015-10-02
Accepted Date : 2015-10-04
DOI :https://doi.org/10.7584/ktappi.2015.47.5.023

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited