Changes in Grinding Characteristics of Pulp Fiber with CMC Addition : Effect of Molecular Weight and Degree of Substitution of CMC

Kyoung-Hwa Choi; Jae-Hun Lee; Byoung-Uk Cho

doi:10.7584/JKTAPPI.2017.06.49.3.64

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Changes in Grinding Characteristics of Pulp Fiber with CMC Addition : Effect of Molecular Weight and Degree of Substitution of CMC CMC 첨가에 따른 펄프 섬유의 그라인딩 특성 변화 : CMC 분자량 및 치환도가 미치는 영향

30 June 2017. pp. 64-70

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Abstract

This study was conducted to investigate the effect of molecular weight and degree of substitution of carboxymethyl cellulose (CMC) on the grinding characteristics of hardwood bleached kraft pulp (HwBKP) during MFC production. CMCs having different molecular weights and degree of substitution were added into the pulp stock before grinding, and then the fibrillation and morphological properties of HwBKP during grinding were analyzed. The result showed that CMC contributed to improvement in grinding of HwBKP. Fibrillation factors including fibril area, water retention value, and pulp slurry viscosity were increased with CMC addition. It is speculated that CMC improved fibrillation of HwBKP during grinding because CMC acted as a lubricant and/or a thickener. The CMC with a high molecular weight showed improved grinding characteristics while a distinct effect of degree of substitution of CMC was not observed.

Keywords

CMC (carboxymethyl cellulose)

molecular weight

degree of substitution

grinding characteristics

MFC (microfibrillated cellulose)

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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 : 49
No :3
Pages :64-70
Received Date : 2017-06-08
Revised Date : 2017-06-19
Accepted Date : 2017-06-20
DOI :https://doi.org/10.7584/JKTAPPI.2017.06.49.3.64

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

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Literature Cited