Changes in fiber ultrastructure during various kraft pulping conditions evaluated by 13C CPMAS NMR spectroscopy

Tommi Virtanen; Sirkka Liisa Maunu; Tarja Tamminen; Bo Hortling; Tiina Liitiä

doi:10.1016/j.carbpol.2007.11.015

Changes in fiber ultrastructure during various kraft pulping conditions evaluated by ¹³C CPMAS NMR spectroscopy

Tommi Virtanen (Corresponding Author), Sirkka Liisa Maunu, Tarja Tamminen, Bo Hortling, Tiina Liitiä

Research output: Contribution to journal › Article › Scientific › peer-review

22 Citations (Scopus)

Abstract

In order to obtain information about the correlation of cellulose fibril aggregate size with the macroscale properties of the wood pulp fibers, three kraft cooking methods with widely varying cooking conditions were used to produce kraft pulps having significantly different physical properties. Variations in cooking conditions included different cooking temperatures, and changes in alkalinity and sulfidity levels. The ultrastructure of these kraft pulps was analysed using ¹³C CPMAS NMR spectroscopy. From measured spectra cellulose fibril aggregate sizes were determined by means of deconvolution. It was observed that changes in kraft pulping conditions have effect on aggregate size in studied pulps. No clear correlation however between aggregate sizes and physical properties of the pulps was observed.

Original language	English
Pages (from-to)	156-163
Number of pages	8
Journal	Carbohydrate Polymers
Volume	73
Issue number	1
DOIs	https://doi.org/10.1016/j.carbpol.2007.11.015
Publication status	Published - 2008
MoE publication type	A1 Journal article-refereed

Keywords

13C CPMAS NMR
cellulose
fibril aggregation
kraft pulp
deconvolution

Access to Document

10.1016/j.carbpol.2007.11.015

Cite this

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title = "Changes in fiber ultrastructure during various kraft pulping conditions evaluated by 13C CPMAS NMR spectroscopy",

abstract = "In order to obtain information about the correlation of cellulose fibril aggregate size with the macroscale properties of the wood pulp fibers, three kraft cooking methods with widely varying cooking conditions were used to produce kraft pulps having significantly different physical properties. Variations in cooking conditions included different cooking temperatures, and changes in alkalinity and sulfidity levels. The ultrastructure of these kraft pulps was analysed using 13C CPMAS NMR spectroscopy. From measured spectra cellulose fibril aggregate sizes were determined by means of deconvolution. It was observed that changes in kraft pulping conditions have effect on aggregate size in studied pulps. No clear correlation however between aggregate sizes and physical properties of the pulps was observed.",

keywords = "13C CPMAS NMR, cellulose, fibril aggregation, kraft pulp, deconvolution",

author = "Tommi Virtanen and Maunu, {Sirkka Liisa} and Tarja Tamminen and Bo Hortling and Tiina Liiti{\"a}",

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T1 - Changes in fiber ultrastructure during various kraft pulping conditions evaluated by 13C CPMAS NMR spectroscopy

AU - Virtanen, Tommi

AU - Maunu, Sirkka Liisa

AU - Tamminen, Tarja

AU - Hortling, Bo

AU - Liitiä, Tiina

PY - 2008

Y1 - 2008

N2 - In order to obtain information about the correlation of cellulose fibril aggregate size with the macroscale properties of the wood pulp fibers, three kraft cooking methods with widely varying cooking conditions were used to produce kraft pulps having significantly different physical properties. Variations in cooking conditions included different cooking temperatures, and changes in alkalinity and sulfidity levels. The ultrastructure of these kraft pulps was analysed using 13C CPMAS NMR spectroscopy. From measured spectra cellulose fibril aggregate sizes were determined by means of deconvolution. It was observed that changes in kraft pulping conditions have effect on aggregate size in studied pulps. No clear correlation however between aggregate sizes and physical properties of the pulps was observed.

AB - In order to obtain information about the correlation of cellulose fibril aggregate size with the macroscale properties of the wood pulp fibers, three kraft cooking methods with widely varying cooking conditions were used to produce kraft pulps having significantly different physical properties. Variations in cooking conditions included different cooking temperatures, and changes in alkalinity and sulfidity levels. The ultrastructure of these kraft pulps was analysed using 13C CPMAS NMR spectroscopy. From measured spectra cellulose fibril aggregate sizes were determined by means of deconvolution. It was observed that changes in kraft pulping conditions have effect on aggregate size in studied pulps. No clear correlation however between aggregate sizes and physical properties of the pulps was observed.

KW - 13C CPMAS NMR

KW - cellulose

KW - fibril aggregation

KW - kraft pulp

KW - deconvolution

U2 - 10.1016/j.carbpol.2007.11.015

DO - 10.1016/j.carbpol.2007.11.015

M3 - Article

SN - 0144-8617

VL - 73

SP - 156

EP - 163

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

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