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Determination of Yo...
Determination of Young's Modulus for Nanofibrillated Cellulose Multilayer Thin Films Using Buckling Mechanics
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- Cranston, Emily D. (author)
- KTH,Fiberteknologi,Royal Institute of Technology
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- Eita, Mohamed (author)
- KTH,Fiberteknologi,Royal Institute of Technology
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- Johansson, Erik (author)
- KTH,Fiberteknologi,Royal Institute of Technology
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- Netrval, Julia (author)
- Bruker AXS Nord AB
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- Salajkova, Michaela (author)
- KTH,Fiberteknologi,Royal Institute of Technology
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- Arwin, Hans (author)
- Linköpings universitet,Tillämpad optik,Tekniska högskolan
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- Wågberg, Lars (author)
- KTH,Fiberteknologi,Royal Institute of Technology
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(creator_code:org_t)
- 2011-03-11
- 2011
- English.
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In: Biomacromolecules. - : American Chemical Society (ACS). - 1525-7797 .- 1526-4602. ; 12:4, s. 961-969
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- The Young's modulus of multilayer films containing nanofibrillated cellulose (NFC) and polyethyleneimine (PEI) was determined Using the strain-induced elastic buckling instability for mechanical measurements (SLEBIMM) technique.(1) Multilayer films were built up on polydimethylsiloxane substrates using electrostatic layer-by-layer assembly. At 50% relative humidity, SIEBIMM gave a constant Young's modulus of 1.5 +/- 0.2 GPa for 35-75 run thick films. Conversely, in vacuum, the Young's modulus was 10 times larger, at 17.2 +/- 1.2 GPa. A slight decrease in buckling wavelength with increasing strain was observed by scanning electron microscopy with in situ compression, and above 10% strain, extensive cracking parallel to the compressive direction occurred. We conclude that whereas PEI acts as a "glue" to hold multiple layers of NFC together, it prevents full development of hydrogen bonding and specific fibril-fibril interactions, and at high humidity, its hygroscopic nature decreases the elastic modulus when compared with pure NFC films.
Subject headings
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Keyword
- Polymer chemistry
- Polymerkemi
- TECHNOLOGY
Publication and Content Type
- ref (subject category)
- art (subject category)
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