Abstract
| Original language | English |
|---|---|
| Journal | Powder Technology |
| DOIs | |
| Publication status | E-pub ahead of print - 21 Nov 2019 |
| MoE publication type | A1 Journal article-refereed |
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Manufacture of fine cellulose powder from chemically crosslinked kraft pulp sheets using dry milling. / Korpela, Antti (Corresponding Author); Orelma, Hannes (Corresponding Author).
In: Powder Technology, 21.11.2019.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Manufacture of fine cellulose powder from chemically crosslinked kraft pulp sheets using dry milling
AU - Korpela, Antti
AU - Orelma, Hannes
PY - 2019/11/21
Y1 - 2019/11/21
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.
U2 - 10.1016/j.powtec.2019.11.064
DO - 10.1016/j.powtec.2019.11.064
M3 - Article
JO - Powder Technology
JF - Powder Technology
SN - 0032-5910
ER -