Foam-laid thermoplastic composites based on kraft lignin and softwood pulp

Antti Ojala, Lisa Wikström, Kalle Nättinen, Jani Lehmonen, Karita Kinnunen-Raudaskoski

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This article presents a new method of producing thermomoldable nonwoven materials based on kraft lignin (KL) and softwood kraft pulp (KP). A mixture of starch acetate (SA) and triethyl citrate (TEC) was used as a water insoluble plasticizer for KL. The thermoplastic lignin (TPL) material with the optimized ratio of KL, SA and TEC was prepared in a twin-screw extruder. The TPL compound was ground and mixed with KP fi bers to produce thermoformable sheets using foam-laid technology. The formed webs were compression molded (CM) into plates and mechanically tested. The foam-laid composites had tensile strengths and modulus of 67 MPa and 5.2 GPa, respectively. Scanning electron microscopy (SEM) was used to analyze the dispersion of the fi bers and the matrix in the composites. As a comparison, injection molded (IM) TPL-KP composites were also prepared.
Original languageEnglish
Pages (from-to)278-284
Number of pages7
JournalJournal of Renewable Materials
Volume2
Issue number4
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

Kraft pulp
Softwoods
Lignin
foam
Thermoplastics
lignin
Pulp
Foams
Composite materials
Plasticizers
Extruders
Starch
starch
acetate
Compaction
Tensile strength
Elastic moduli
Scanning electron microscopy
Water
tensile strength

Keywords

  • foam-laid technology
  • thermoplastic lignin
  • biocomposite
  • kraft pulp

Cite this

Ojala, Antti ; Wikström, Lisa ; Nättinen, Kalle ; Lehmonen, Jani ; Kinnunen-Raudaskoski, Karita. / Foam-laid thermoplastic composites based on kraft lignin and softwood pulp. In: Journal of Renewable Materials. 2014 ; Vol. 2, No. 4. pp. 278-284.
@article{8a5e2f25d5b8489f9da628331d22ef71,
title = "Foam-laid thermoplastic composites based on kraft lignin and softwood pulp",
abstract = "This article presents a new method of producing thermomoldable nonwoven materials based on kraft lignin (KL) and softwood kraft pulp (KP). A mixture of starch acetate (SA) and triethyl citrate (TEC) was used as a water insoluble plasticizer for KL. The thermoplastic lignin (TPL) material with the optimized ratio of KL, SA and TEC was prepared in a twin-screw extruder. The TPL compound was ground and mixed with KP fi bers to produce thermoformable sheets using foam-laid technology. The formed webs were compression molded (CM) into plates and mechanically tested. The foam-laid composites had tensile strengths and modulus of 67 MPa and 5.2 GPa, respectively. Scanning electron microscopy (SEM) was used to analyze the dispersion of the fi bers and the matrix in the composites. As a comparison, injection molded (IM) TPL-KP composites were also prepared.",
keywords = "foam-laid technology, thermoplastic lignin, biocomposite, kraft pulp",
author = "Antti Ojala and Lisa Wikstr{\"o}m and Kalle N{\"a}ttinen and Jani Lehmonen and Karita Kinnunen-Raudaskoski",
year = "2014",
doi = "10.7569/JRM.2014.634126",
language = "English",
volume = "2",
pages = "278--284",
journal = "Journal of Renewable Materials",
issn = "2164-6325",
publisher = "Scrivener Publishing",
number = "4",

}

Foam-laid thermoplastic composites based on kraft lignin and softwood pulp. / Ojala, Antti; Wikström, Lisa; Nättinen, Kalle; Lehmonen, Jani; Kinnunen-Raudaskoski, Karita.

In: Journal of Renewable Materials, Vol. 2, No. 4, 2014, p. 278-284.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Foam-laid thermoplastic composites based on kraft lignin and softwood pulp

AU - Ojala, Antti

AU - Wikström, Lisa

AU - Nättinen, Kalle

AU - Lehmonen, Jani

AU - Kinnunen-Raudaskoski, Karita

PY - 2014

Y1 - 2014

N2 - This article presents a new method of producing thermomoldable nonwoven materials based on kraft lignin (KL) and softwood kraft pulp (KP). A mixture of starch acetate (SA) and triethyl citrate (TEC) was used as a water insoluble plasticizer for KL. The thermoplastic lignin (TPL) material with the optimized ratio of KL, SA and TEC was prepared in a twin-screw extruder. The TPL compound was ground and mixed with KP fi bers to produce thermoformable sheets using foam-laid technology. The formed webs were compression molded (CM) into plates and mechanically tested. The foam-laid composites had tensile strengths and modulus of 67 MPa and 5.2 GPa, respectively. Scanning electron microscopy (SEM) was used to analyze the dispersion of the fi bers and the matrix in the composites. As a comparison, injection molded (IM) TPL-KP composites were also prepared.

AB - This article presents a new method of producing thermomoldable nonwoven materials based on kraft lignin (KL) and softwood kraft pulp (KP). A mixture of starch acetate (SA) and triethyl citrate (TEC) was used as a water insoluble plasticizer for KL. The thermoplastic lignin (TPL) material with the optimized ratio of KL, SA and TEC was prepared in a twin-screw extruder. The TPL compound was ground and mixed with KP fi bers to produce thermoformable sheets using foam-laid technology. The formed webs were compression molded (CM) into plates and mechanically tested. The foam-laid composites had tensile strengths and modulus of 67 MPa and 5.2 GPa, respectively. Scanning electron microscopy (SEM) was used to analyze the dispersion of the fi bers and the matrix in the composites. As a comparison, injection molded (IM) TPL-KP composites were also prepared.

KW - foam-laid technology

KW - thermoplastic lignin

KW - biocomposite

KW - kraft pulp

U2 - 10.7569/JRM.2014.634126

DO - 10.7569/JRM.2014.634126

M3 - Article

VL - 2

SP - 278

EP - 284

JO - Journal of Renewable Materials

JF - Journal of Renewable Materials

SN - 2164-6325

IS - 4

ER -