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Structural properties and micromechanics of PMMA-based electrospun hybrid fibers
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymeric Materials.ORCID iD: 0000-0002-0236-5420
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. , x, 28 p.
Series
TRITA-CHE-Report, ISSN 1654-1081 ; 2013:42
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-133788ISBN: 978-91-7501-876-8 (print)OAI: oai:DiVA.org:kth-133788DiVA: diva2:663346
Presentation
2013-10-24, B2, Brinellvägen 23, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20131111

Available from: 2013-11-11 Created: 2013-11-11 Last updated: 2015-08-21Bibliographically approved
List of papers
1. Micromechanical Tensile Testing of Cellulose-Reinforced Electrospun Fibers Using a Template Transfer Method (TTM)
Open this publication in new window or tab >>Micromechanical Tensile Testing of Cellulose-Reinforced Electrospun Fibers Using a Template Transfer Method (TTM)
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2012 (English)In: Journal of polymers and the environment, ISSN 1064-7546, E-ISSN 1572-8900, Vol. 20, no 4, 967-975 p.Article in journal (Refereed) Published
Abstract [en]

A template transfer method (TTM) and a fiber fixation technique were established for fiber handling and micro tensile stage mounting of aligned and non-aligned electrospun fiber mats. The custom-made template had been precut to be mounted on a variety of collectors, including a rapidly rotating collector used to align the fibers. The method eliminated need for direct physical interaction with the fiber mats before or during the tensile testing since the fiber mats were never directly clamped or removed from the original substrate. By using the TTM it was possible to measure the tensile properties of aligned poly(methyl methacrylate) (PMMA) fiber mats, which showed a 250 % increase in strength and 450 % increase in modulus as compared to a non-aligned system. The method was further evaluated for aligned PMMA fibers reinforced with cellulose (4 wt%) prepared as enzymatically derived nanofibrillated cellulose (NFC). These fibers showed an additional increase of 30 % in both tensile strength and modulus, resulting in a toughness increase of 25 %. The fracture interfaces of the PMMA-NFC fibers showed a low amount of NFC pull-outs, indicating favorable phase compatibility. The presented fiber handling technique is universal and may be applied where conservative estimates of mechanical properties need to be assessed for very thin fibers.

Keyword
Cellulose crystals (NFC), Electrospinning, Micro mechanical tensile testing, PMMA, Template transfer method (TTM)
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-115467 (URN)10.1007/s10924-012-0486-6 (DOI)000312402900009 ()2-s2.0-84871263311 (Scopus ID)
Funder
Sida - Swedish International Development Cooperation Agency
Note

QC 20130116

Available from: 2013-01-16 Created: 2013-01-15 Last updated: 2017-12-06Bibliographically approved
2. Micromechanics of toughness improved electrospun PMMA fibers with embedded cellulose as tested under in-situ microscopy
Open this publication in new window or tab >>Micromechanics of toughness improved electrospun PMMA fibers with embedded cellulose as tested under in-situ microscopy
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(English)Manuscript (preprint) (Other academic)
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-133786 (URN)
Note

QS 2013

Available from: 2013-11-11 Created: 2013-11-11 Last updated: 2013-11-11Bibliographically approved

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Andersson, Richard L.

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