Abstract
Triple-shape memory epoxy (EP)/polycaprolactone (PCL) systems (PCL content: 23 wt %) with different structures (PCL nanoweb embedded in EP matrix and EP/PCL with co-continuous phase structure) were produced. To set the two temporary shapes, the glass transition temperature (Tg) of the EP and the melting temperature (Tm) of PCL served during the shape memory cycle. An attempt was made to reinforce the PCL nanoweb by graphene nanoplatelets prior to infiltrating the nanoweb with EP through vacuum assisted resin transfer molding. Morphology was analyzed by scanning electron microscopy and Raman spectrometry. Triple-shape memory characteristics were determined by dynamic mechanical analysis in tension mode. Graphene was supposed to act also as spacer between the nanofibers, improving the quality of impregnation with EP. The EP phase related shape memory properties were similar for all systems, while those belonging to PCL phase depended on the structure. Shape fixity of PCL was better without than with graphene reinforcement. The best shape memory performance was shown by the EP/PCL with co-continuous structure. Based on Raman spectrometry results, the characteristic dimension of the related co-continuous network was below 900 nm.
| Original language | English |
|---|---|
| Pages (from-to) | 4489-4504 |
| Number of pages | 16 |
| Journal | Materials |
| Volume | 6 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2013 |
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Keywords
- Co-continuous phase structure
- Electrospinning
- Graphene
- Nanocomposite
- Nanofiber
- Polycaprolactone
- Poxy
- Triple-shape memory effect
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Epoxy/polycaprolactone systems with triple-shape memory effect : Electrospun nanoweb with and without graphene Versus co-continuous morphology. / Fejos, Márta; Molnár, Kolos; Karger-Kocsis, J.
In: Materials, Vol. 6, No. 10, 2013, p. 4489-4504.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Epoxy/polycaprolactone systems with triple-shape memory effect
T2 - Electrospun nanoweb with and without graphene Versus co-continuous morphology
AU - Fejos, Márta
AU - Molnár, Kolos
AU - Karger-Kocsis, J.
PY - 2013
Y1 - 2013
N2 - Triple-shape memory epoxy (EP)/polycaprolactone (PCL) systems (PCL content: 23 wt %) with different structures (PCL nanoweb embedded in EP matrix and EP/PCL with co-continuous phase structure) were produced. To set the two temporary shapes, the glass transition temperature (Tg) of the EP and the melting temperature (Tm) of PCL served during the shape memory cycle. An attempt was made to reinforce the PCL nanoweb by graphene nanoplatelets prior to infiltrating the nanoweb with EP through vacuum assisted resin transfer molding. Morphology was analyzed by scanning electron microscopy and Raman spectrometry. Triple-shape memory characteristics were determined by dynamic mechanical analysis in tension mode. Graphene was supposed to act also as spacer between the nanofibers, improving the quality of impregnation with EP. The EP phase related shape memory properties were similar for all systems, while those belonging to PCL phase depended on the structure. Shape fixity of PCL was better without than with graphene reinforcement. The best shape memory performance was shown by the EP/PCL with co-continuous structure. Based on Raman spectrometry results, the characteristic dimension of the related co-continuous network was below 900 nm.
AB - Triple-shape memory epoxy (EP)/polycaprolactone (PCL) systems (PCL content: 23 wt %) with different structures (PCL nanoweb embedded in EP matrix and EP/PCL with co-continuous phase structure) were produced. To set the two temporary shapes, the glass transition temperature (Tg) of the EP and the melting temperature (Tm) of PCL served during the shape memory cycle. An attempt was made to reinforce the PCL nanoweb by graphene nanoplatelets prior to infiltrating the nanoweb with EP through vacuum assisted resin transfer molding. Morphology was analyzed by scanning electron microscopy and Raman spectrometry. Triple-shape memory characteristics were determined by dynamic mechanical analysis in tension mode. Graphene was supposed to act also as spacer between the nanofibers, improving the quality of impregnation with EP. The EP phase related shape memory properties were similar for all systems, while those belonging to PCL phase depended on the structure. Shape fixity of PCL was better without than with graphene reinforcement. The best shape memory performance was shown by the EP/PCL with co-continuous structure. Based on Raman spectrometry results, the characteristic dimension of the related co-continuous network was below 900 nm.
KW - Co-continuous phase structure
KW - Electrospinning
KW - Graphene
KW - Nanocomposite
KW - Nanofiber
KW - Polycaprolactone
KW - Poxy
KW - Triple-shape memory effect
UR - http://www.scopus.com/inward/record.url?scp=84888769255&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84888769255&partnerID=8YFLogxK
U2 - 10.3390/ma6104489
DO - 10.3390/ma6104489
M3 - Article
AN - SCOPUS:84888769255
VL - 6
SP - 4489
EP - 4504
JO - Materials
JF - Materials
SN - 1996-1944
IS - 10
ER -