Composites of High-Temperature Thermomechanical Pulps and Polylactic Acid

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Solala, Iina Koistinen, Antti Siljander, Sanna Vuorinen, Jyrki Vuorinen, Tapani 2017-05-03T12:04:07Z 2017-05-03T12:04:07Z 2016-02
dc.identifier.citation Solala , I , Koistinen , A , Siljander , S , Vuorinen , J & Vuorinen , T 2016 , ' Composites of High-Temperature Thermomechanical Pulps and Polylactic Acid ' BIORESOURCES , vol 11 , no. 1 , pp. 1125-1140 . DOI: 10.15376/biores.11.1.1125-1140 en
dc.identifier.issn 1930-2126
dc.identifier.other PURE UUID: 42819a92-0db6-434d-bce3-274cc4ea7dfc
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE FILEURL:
dc.description.abstract High-temperature thermomechanical pulps (HT-TMP, defibrated at 150 to 170 degrees C) were compared to a reference TMP (defibrated at 130 degrees C) as a reinforcement for polylactic acid (PLA). Composites were prepared by melt compounding, followed by injection molding, gradually increasing the used fiber content from 0 to 20 wt.%. The injection-molded specimens were characterized by tensile and impact strength tests, scanning electron microscopy, water absorption tests, and differential scanning calorimetry. The TMP fiber damage was also characterized before and after melt compounding by optical analysis. At 20% fiber content, the Young's modulus increased significantly, while the tensile strength remained unchanged and the impact strength decreased slightly. All fibers suffered damage during melt compounding, but the tensile strength remained about the same as in pure PLA. All types of TMP were able to increase the PLA rate of crystallization. The HT-TMP fibers were dispersed more evenly in PLA than the 130degrees C TMP. The 170 degrees C TMP produced composites of lower water absorption than the other two TMP types, probably because of its lower hemicellulose content and its higher surface coverage by lignin. en
dc.format.extent 16
dc.format.extent 1125-1140
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries BIORESOURCES en
dc.relation.ispartofseries Volume 11, issue 1 en
dc.rights openAccess en
dc.subject.other 216 Materials engineering en
dc.title Composites of High-Temperature Thermomechanical Pulps and Polylactic Acid en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Forest Products Technology
dc.contributor.department Tampere University of Technology
dc.contributor.department Department of Bioproducts and Biosystems en
dc.subject.keyword Polylactic acid
dc.subject.keyword High-temperature thermomechanical pulp
dc.subject.keyword Hydrophobic fibers
dc.subject.keyword Wood fiber composites
dc.subject.keyword Thermal properties
dc.subject.keyword Mechanical properties
dc.subject.keyword FIBER MORPHOLOGY
dc.subject.keyword CELL-WALL
dc.subject.keyword POLYMER COMPOSITES
dc.subject.keyword BARRIER PROPERTIES
dc.subject.keyword WOOD
dc.subject.keyword PLA
dc.subject.keyword CRYSTALLINITY
dc.subject.keyword LENGTH
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201705033786
dc.identifier.doi 10.15376/biores.11.1.1125-1140
dc.type.version publishedVersion

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