Manufacture of fine cellulose powder from chemically crosslinked kraft pulp sheets using dry milling

Antti Korpela; Hannes Orelma

doi:10.1016/j.powtec.2019.11.064

Manufacture of fine cellulose powder from chemically crosslinked kraft pulp sheets using dry milling

Antti Korpela (Corresponding Author), Hannes Orelma (Corresponding Author)

BA3502 Biocomposites and processing

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

3 Citations (Scopus)

Abstract

The present study concerns the preparation of cellulosic powders with two-stage dry milling of chemically crosslinked birch kraft pulp sheets. Chemical crosslinking of kraft pulp sheets using glyoxal with and without a catalyst (aluminium sulphate) made the pliable, tenacious kraft pulp sheets brittle. Due to the brittleness, the crosslinked pulp sheets could be disintegrated easily and rapidly using a Wiley mill. The length-weighted average fibre length of the crosslinked pulp powders (0.31–0.33 mm) was shorter than the Wiley-milled reference powder (0.44 mm). The notably higher density and less fluffy character of the crosslinked pulp powders enabled their effortless further processing with an air-flow-type ultra-fine microniser. The medium size value (D50) of the micronised crosslinked powders was around 40 μm. The study finds that chemical crosslinking pre-treatment enhances the dry milling of kraft pulps to a fine powder. Chemical crosslinking may offer a new tool for industrial cellulosic powder manufacturing.

Original language	English
Pages (from-to)	642-650
Number of pages	9
Journal	Powder Technology
Volume	361
Early online date	21 Nov 2019
DOIs	https://doi.org/10.1016/j.powtec.2019.11.064
Publication status	Published - 1 Feb 2020
MoE publication type	A1 Journal article-refereed

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10.1016/j.powtec.2019.11.064

https://linkinghub.elsevier.com/retrieve/pii/S0032591019310253

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title = "Manufacture of fine cellulose powder from chemically crosslinked kraft pulp sheets using dry milling",

abstract = "The present study concerns the preparation of cellulosic powders with two-stage dry milling of chemically crosslinked birch kraft pulp sheets. Chemical crosslinking of kraft pulp sheets using glyoxal with and without a catalyst (aluminium sulphate) made the pliable, tenacious kraft pulp sheets brittle. Due to the brittleness, the crosslinked pulp sheets could be disintegrated easily and rapidly using a Wiley mill. The length-weighted average fibre length of the crosslinked pulp powders (0.31–0.33 mm) was shorter than the Wiley-milled reference powder (0.44 mm). The notably higher density and less fluffy character of the crosslinked pulp powders enabled their effortless further processing with an air-flow-type ultra-fine microniser. The medium size value (D50) of the micronised crosslinked powders was around 40 μm. The study finds that chemical crosslinking pre-treatment enhances the dry milling of kraft pulps to a fine powder. Chemical crosslinking may offer a new tool for industrial cellulosic powder manufacturing.",

author = "Antti Korpela and Hannes Orelma",

note = "Funding Information: The work was part of the Academy of Finland Flagship Programme under Project Nos. 318890 and 318891 ( Competence Centre for Materials Bioeconomy, FinnCERES ). Our thanks go out to Mirja Muhola for the BET analysis, to Mirja Nyg{\aa}rd for the thermogravimetric measurements, to Tommi Virtanen for NMR analysis, to Liisa {\"A}n{\"a}k{\"a}inen for photomicrographs, and to Pia Siventoinen and Markus Nikinmaa for performing the fine grinding of the cellulose powders. Funding Information: The work was part of the Academy of Finland Flagship Programme under Project Nos. 318890 and 318891 (Competence Centre for Materials Bioeconomy, FinnCERES). Our thanks go out to Mirja Muhola for the BET analysis, to Mirja Nyg?rd for the thermogravimetric measurements, to Tommi Virtanen for NMR analysis, to Liisa ?n?k?inen for photomicrographs, and to Pia Siventoinen and Markus Nikinmaa for performing the fine grinding of the cellulose powders. Publisher Copyright: {\textcopyright} 2019 The Authors Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.powtec.2019.11.064",

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AU - Korpela, Antti

AU - Orelma, Hannes

N1 - Funding Information: The work was part of the Academy of Finland Flagship Programme under Project Nos. 318890 and 318891 ( Competence Centre for Materials Bioeconomy, FinnCERES ). Our thanks go out to Mirja Muhola for the BET analysis, to Mirja Nygård for the thermogravimetric measurements, to Tommi Virtanen for NMR analysis, to Liisa Änäkäinen for photomicrographs, and to Pia Siventoinen and Markus Nikinmaa for performing the fine grinding of the cellulose powders. Funding Information: The work was part of the Academy of Finland Flagship Programme under Project Nos. 318890 and 318891 (Competence Centre for Materials Bioeconomy, FinnCERES). Our thanks go out to Mirja Muhola for the BET analysis, to Mirja Nyg?rd for the thermogravimetric measurements, to Tommi Virtanen for NMR analysis, to Liisa ?n?k?inen for photomicrographs, and to Pia Siventoinen and Markus Nikinmaa for performing the fine grinding of the cellulose powders. Publisher Copyright: © 2019 The Authors Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/2/1

Y1 - 2020/2/1

N2 - The present study concerns the preparation of cellulosic powders with two-stage dry milling of chemically crosslinked birch kraft pulp sheets. Chemical crosslinking of kraft pulp sheets using glyoxal with and without a catalyst (aluminium sulphate) made the pliable, tenacious kraft pulp sheets brittle. Due to the brittleness, the crosslinked pulp sheets could be disintegrated easily and rapidly using a Wiley mill. The length-weighted average fibre length of the crosslinked pulp powders (0.31–0.33 mm) was shorter than the Wiley-milled reference powder (0.44 mm). The notably higher density and less fluffy character of the crosslinked pulp powders enabled their effortless further processing with an air-flow-type ultra-fine microniser. The medium size value (D50) of the micronised crosslinked powders was around 40 μm. The study finds that chemical crosslinking pre-treatment enhances the dry milling of kraft pulps to a fine powder. Chemical crosslinking may offer a new tool for industrial cellulosic powder manufacturing.

AB - The present study concerns the preparation of cellulosic powders with two-stage dry milling of chemically crosslinked birch kraft pulp sheets. Chemical crosslinking of kraft pulp sheets using glyoxal with and without a catalyst (aluminium sulphate) made the pliable, tenacious kraft pulp sheets brittle. Due to the brittleness, the crosslinked pulp sheets could be disintegrated easily and rapidly using a Wiley mill. The length-weighted average fibre length of the crosslinked pulp powders (0.31–0.33 mm) was shorter than the Wiley-milled reference powder (0.44 mm). The notably higher density and less fluffy character of the crosslinked pulp powders enabled their effortless further processing with an air-flow-type ultra-fine microniser. The medium size value (D50) of the micronised crosslinked powders was around 40 μm. The study finds that chemical crosslinking pre-treatment enhances the dry milling of kraft pulps to a fine powder. Chemical crosslinking may offer a new tool for industrial cellulosic powder manufacturing.

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U2 - 10.1016/j.powtec.2019.11.064

DO - 10.1016/j.powtec.2019.11.064

M3 - Article

VL - 361

SP - 642

EP - 650

JO - Powder Technology

JF - Powder Technology

SN - 0032-5910

ER -

Manufacture of fine cellulose powder from chemically crosslinked kraft pulp sheets using dry milling

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