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Structural properties and micromechanics of PMMA-based electrospun hybrid fibers
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi, Polymera material.ORCID-id: 0000-0002-0236-5420
2013 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2013. , s. x, 28
Serie
TRITA-CHE-Report, ISSN 1654-1081 ; 2013:42
Nationell ämneskategori
Polymerkemi
Identifikatorer
URN: urn:nbn:se:kth:diva-133788ISBN: 978-91-7501-876-8 (tryckt)OAI: oai:DiVA.org:kth-133788DiVA, id: diva2:663346
Presentation
2013-10-24, B2, Brinellvägen 23, KTH, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20131111

Tillgänglig från: 2013-11-11 Skapad: 2013-11-11 Senast uppdaterad: 2015-08-21Bibliografiskt granskad
Delarbeten
1. Micromechanical Tensile Testing of Cellulose-Reinforced Electrospun Fibers Using a Template Transfer Method (TTM)
Öppna denna publikation i ny flik eller fönster >>Micromechanical Tensile Testing of Cellulose-Reinforced Electrospun Fibers Using a Template Transfer Method (TTM)
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2012 (Engelska)Ingår i: Journal of polymers and the environment, ISSN 1064-7546, E-ISSN 1572-8900, Vol. 20, nr 4, s. 967-975Artikel i tidskrift (Refereegranskat) 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.

Nyckelord
Cellulose crystals (NFC), Electrospinning, Micro mechanical tensile testing, PMMA, Template transfer method (TTM)
Nationell ämneskategori
Polymerteknologi
Identifikatorer
urn:nbn:se:kth:diva-115467 (URN)10.1007/s10924-012-0486-6 (DOI)000312402900009 ()2-s2.0-84871263311 (Scopus ID)
Forskningsfinansiär
Sida - Styrelsen för internationellt utvecklingssamarbete
Anmärkning

QC 20130116

Tillgänglig från: 2013-01-16 Skapad: 2013-01-15 Senast uppdaterad: 2017-12-06Bibliografiskt granskad
2. Micromechanics of toughness improved electrospun PMMA fibers with embedded cellulose as tested under in-situ microscopy
Öppna denna publikation i ny flik eller fönster >>Micromechanics of toughness improved electrospun PMMA fibers with embedded cellulose as tested under in-situ microscopy
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(Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Nationell ämneskategori
Polymerteknologi
Identifikatorer
urn:nbn:se:kth:diva-133786 (URN)
Anmärkning

QS 2013

Tillgänglig från: 2013-11-11 Skapad: 2013-11-11 Senast uppdaterad: 2013-11-11Bibliografiskt granskad

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Andersson, Richard L.

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Andersson, Richard L.
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Polymera material
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