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Cho, S.-W.
Alternative names
Publications (10 of 39) Show all publications
Adekunle, K., Cho, S.-W., Patzelt, C., Blomfeldt, T. & Skrifvars, M. (2012). Impact and flexural properties of flax fabrics and Lyocell Fiber reinforced bio-based thermoset for automotive and structural applications. In: : . Paper presented at ECCM15 – 15th European Conference on Composite Materials, Venice, Italy, June 22-28, 2012.
Open this publication in new window or tab >>Impact and flexural properties of flax fabrics and Lyocell Fiber reinforced bio-based thermoset for automotive and structural applications
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2012 (English)Conference paper, Published paper (Refereed)
Keywords
Composites, regenerated cellulose fiber, thermoset, Resursåtervinning
National Category
Materials Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-6953 (URN)2320/11924 (Local ID)2320/11924 (Archive number)2320/11924 (OAI)
Conference
ECCM15 – 15th European Conference on Composite Materials, Venice, Italy, June 22-28, 2012
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2016-11-18Bibliographically approved
Adekunle, K., Ghoreishi, R., Ehsani, M., Cho, S.-W. & Skrifvars, M. (2012). Jute fiber reinforced methacrylated soy bean oil based thermoset composites prepared by vacuum injection molding technique. Journal of Biobased Materials and Bioenergy, 6(2), 172-177
Open this publication in new window or tab >>Jute fiber reinforced methacrylated soy bean oil based thermoset composites prepared by vacuum injection molding technique
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2012 (English)In: Journal of Biobased Materials and Bioenergy, ISSN 1556-6560, E-ISSN 1556-6579, Vol. 6, no 2, p. 172-177Article in journal (Refereed) Published
Abstract [en]

Bio-based composites based on soybean oil thermoset resin were manufactured with vacuum injection molding technique. Methacrylated soybean oil (MMSO) was processed with vacuum injection molding technique without blending with styrene. The composites produced had comparatively good mechanical properties like jute composite reinforced acrylated epoxidised soybean oil (AESO) resin blended with styrene. Although the tensile strength of the jute reinforced AESO composites are slightly higher than the jute reinforced MMSO composites which was attributed to blending of AESO with styrene. However, the difference in Youngs' modulus was negligible because they have approximately equal stiffness between 2.6 GPa and 2.8 GPa. The jute reinforced AESO composites showed relatively higher flexural strengths and moduli than the MMSO counterparts. This difference was also attributed to the blending of AESO with reactive diluent such as styrene. In order to determine the dimensional stability of the composite manufactured, water absorption test was carried out and the conclusion was that the moisture uptake of the jute reinforced composites was the same, this was expected.

Place, publisher, year, edition, pages
American Scientific Publishers, 2012
Keywords
Jute fiber reinforcement, vacuum injection moulding, thermoset, composite, Resursåtervinning
National Category
Materials Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-1483 (URN)10.1166/jbmb.2012.1199 (DOI)000308255300006 ()2320/11915 (Local ID)2320/11915 (Archive number)2320/11915 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-11-05Bibliographically approved
Adekunle, K., Cho, S.-W., Ketzscher, R. & Skrifvars, M. (2012). Mechanical properties of natural fiber hybrid composites based on renewable thermoset resins derived from soybean oil, for use in technical applications. Journal of Applied Polymer Science, 124(6), 4530-4541
Open this publication in new window or tab >>Mechanical properties of natural fiber hybrid composites based on renewable thermoset resins derived from soybean oil, for use in technical applications
2012 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 124, no 6, p. 4530-4541Article in journal (Refereed) Published
Abstract [en]

Natural fiber composites are known to have lower mechanical properties than glass or carbon fiber reinforced composites. The hybrid natural fiber composites prepared in this study have relatively good mechanical properties. Different combinations of woven and non-woven flax fibers were used. The stacking sequence of the fibers was in different orientations, such as 0°, +45°, and 90°. The composites manufactured had good mechanical properties. A tensile strength of about 119 MPa and Young's modulus of about 14 GPa was achieved, with flexural strength and modulus of about 201 MPa and 24 GPa, respectively. For the purposes of comparison, composites were made with a combination of woven fabrics and glass fibers. One ply of a glass fiber mat was sandwiched in the mid-plane and this increased the tensile strength considerably to 168 MPa. Dynamic mechanical analysis was performed in order to determine the storage and loss modulus and the glass transition temperature of the composites. Microstructural analysis was done with scanning electron microscopy.

Place, publisher, year, edition, pages
John Wiley & Sons, Inc., 2012
Keywords
Soybean oil, thermoset, mechanical characterisation, composite, Resursåtervinning
National Category
Materials Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-1481 (URN)10.1002/app.35478 (DOI)000301224500016 ()2320/11912 (Local ID)2320/11912 (Archive number)2320/11912 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-11-05Bibliographically approved
Persson, M., Cho, S.-W., Berglin, L., Tuukkanen, J. & Skrifvars, M. (2012). Poly (Lactid Acid)/Hydroxipatite Composite Fibres for 3D Osteoconductive Woven Scaffolds. Paper presented at ECCM15 15th European Conference on Composite Materials, Venice, Italy, 24-28 June 2012. Paper presented at ECCM15 15th European Conference on Composite Materials, Venice, Italy, 24-28 June 2012. ECCM
Open this publication in new window or tab >>Poly (Lactid Acid)/Hydroxipatite Composite Fibres for 3D Osteoconductive Woven Scaffolds
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2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This study presents a method to melt-spun biocompatible composite fibres from poly(lactic acid) (PLA) and nano-sized hydroxyapatite (HAp) particles. Different loading concentrations of HAp particles in the PLA fibres and solid-state draw-ratios (SSDR) were evaluated in order to study their influence on the mechanical, thermal and morphological properties. The results showed that the incorporation of the HAp particles was homogeneously distributed in the PLA fibres towards their surface and that the SSDR played an important role in order to improve the mechanical properties. The melt-spun PLA/HAp composite fibres, produced in this study, had also the potential to be processed into a fibrous scaffold, which was demonstrated by a 3D woven structure.

Place, publisher, year, edition, pages
ECCM, 2012
Keywords
melt spinning, poly (lactid acid), hydroxiapatite, 3D weaving, Textile technology, Fibre Spinning, Weaving, Tissue engineering
National Category
Materials Engineering
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-6880 (URN)2320/11698 (Local ID)2320/11698 (Archive number)2320/11698 (OAI)
Conference
ECCM15 15th European Conference on Composite Materials, Venice, Italy, 24-28 June 2012
Available from: 2015-12-22 Created: 2015-12-22
Hooshmand, S., Cho, S.-W., Skrifvars, M., Mathew, A. & Oksdamn, K. (2012). Preparation of bio-nanocomposite fibers by melt spinning of cellulose acetate butyrate (CAB) and cellulose nanowhiskers (CNW). In: : . Paper presented at 12th International Conference on Biocomposites – Transition to Green Materials, Niagara Falls, Ontario, Canada, May 6-8, 2012.
Open this publication in new window or tab >>Preparation of bio-nanocomposite fibers by melt spinning of cellulose acetate butyrate (CAB) and cellulose nanowhiskers (CNW)
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2012 (English)Conference paper, Poster (with or without abstract) (Other academic)
Keywords
Cellulose acetate butyrate, nanocomposite, melt extrusion, Resursåtervinning
National Category
Materials Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-6947 (URN)2320/11873 (Local ID)2320/11873 (Archive number)2320/11873 (OAI)
Conference
12th International Conference on Biocomposites – Transition to Green Materials, Niagara Falls, Ontario, Canada, May 6-8, 2012
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2017-09-27Bibliographically approved
Kumar, H., Mahimaisenan, P., Cho, S.-W., Adekunle, K. & Skrifvars, M. (2011). Casein films and its composites with regenerated cellulose fibre for packaging applications. In: : . Paper presented at 19th BEPS Annual Meeting, Vienna, AUSTRIA, September 28-30, 2011.
Open this publication in new window or tab >>Casein films and its composites with regenerated cellulose fibre for packaging applications
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2011 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

A novel approach in the production of protein based films and composites were performed, using the bovine milk protein casein and regenerated cellulose fibres (lyocell). The films were prepared by first dissolving the casein protein in an aqueous alkaline solution in the presence of glycerol as a plasticizer. Further the composite films were prepared by the addition of fibres on aqueous alkaline solution with casein. The casein films and composites were thereafter prepared by casting the solution mixture on Teflon coated glass plate and drying for 48 hr. The effects of glycerol content and lyocell fibre reinforcements on the mechanical, thermal and physiological properties of the casein films were characterized. The results revealed that the increase in the addition of glycerol content decreases the tensile strength, young’s modulus, thermal stability of the film and increases the elongation percentage. Tensile property and thermal stability of the films was improved by the increase in the addition of the fibre content with a gradual decrease in the elongation percentage. The casein film made of 20% glycerol and 20% fibre content showed the maximum tensile strength of 23.5 MPa, E-modulus of 1.5 GPa and glass transition temperature (Tg) of 67.1±1.5 ºC. The sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis indicated that there was no significant change in the molecular weight of the protein during sample preparation. The inter molecular networks have taken place in the casein films and composites, when analyzed under Fourier Transform Infrared Spectroscopy (FTIR), and proper bonding between fibres and protein was observed by scanning electron microscope (SEM).

Keywords
casein, regenerated cellulose fibres, protein based films, composites, Energi och material
National Category
Materials Engineering Polymer Chemistry
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-6620 (URN)2320/9363 (Local ID)2320/9363 (Archive number)2320/9363 (OAI)
Conference
19th BEPS Annual Meeting, Vienna, AUSTRIA, September 28-30, 2011
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2017-02-02Bibliographically approved
Adekunle, K., Cho, S.-W., Patzelt, C., Blomfeldt, T. & Skrifvars, M. (2011). Impact and flexural properties of flax fabrics and Lyocell fiber-reinforced bio-based thermoset. Journal of reinforced plastics and composites (Print), 30(8), 685-697
Open this publication in new window or tab >>Impact and flexural properties of flax fabrics and Lyocell fiber-reinforced bio-based thermoset
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2011 (English)In: Journal of reinforced plastics and composites (Print), ISSN 0731-6844, E-ISSN 1530-7964, Vol. 30, no 8, p. 685-697Article in journal (Refereed)
Abstract [en]

A bio-based thermoset resin was reinforced with flax fabrics and Lyocell fiber. The effect of different weave architectures was studied with four flax fabrics with different architectures: plain, twill (two different types), and dobby. The effect of the outer ply thickness was studied and characterized with flexural and impact testing. Composites manufactured with plain weave reinforcement had the best mechanical properties. The tensile strength, tensile modulus, flexural strength, flexural modulus, and impact strength were 280 MPa, 32 GPa, 250 MPa, 25 GPa, and 75 kJ/m2, respectively. Reinforcements with twill-weave architecture did not impart appreciable flexural strength or flexural modulus even when the outer thickness was increased. Plain- and dobby (basket woven style)-weave architectures gave better reinforcing effects and the flexural properties increased with an increase in outer thickness.Water absorption properties of the composites were studied and it was observed that the hybridization with Lyocell fiber reduced the water uptake. Fieldemission scanning electron microscopy was used to study the micro-structural properties of the composites.

Place, publisher, year, edition, pages
Sage Publications Ltd., 2011
Keywords
water absorption, impact test, flax fiber, bio-based resin, lyocell fiber, Energi och material
National Category
Natural Sciences Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-3228 (URN)10.1177/0731684411405874 (DOI)2320/9763 (Local ID)2320/9763 (Archive number)2320/9763 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-12-01
Cho, S.-W., Gällstedt, M., Johansson, E. & Hedenqvist, M. S. (2011). Injection-molded nanocomposites and materials based on wheat gluten. International Journal of Biological Macromolecules, 48(1), 146-152
Open this publication in new window or tab >>Injection-molded nanocomposites and materials based on wheat gluten
2011 (English)In: International Journal of Biological Macromolecules, ISSN 0141-8130, E-ISSN 1879-0003, Vol. 48, no 1, p. 146-152Article in journal (Refereed) Published
Abstract [en]

This is, to our knowledge, the first study of the injection molding of materials where wheat gluten (WG) is the main component. In addition to a plasticizer (glycerol), 5 wt.% natural montmorillonite clay was added. X-ray indicated intercalated clay and transmission electron microscopy indicated locally good clay platelet dispersion. Prior to feeding into the injection molder, the material was first compression molded into plates and pelletized. The filling of the circular mold via the central gate was characterized by a divergent flow yielding, in general, a stronger and stiffer material in the circumferential direction. It was observed that 20–30 wt.% glycerol yielded the best combination of processability and mechanical properties. The clay yielded improved processability, plate homogeneity and tensile stiffness. IR spectroscopy and protein solubility indicated that the injection molding process yielded a highly aggregated structure. The overall conclusion was that injection molding is a very promising method for producing WG objects.

Place, publisher, year, edition, pages
Elsevier BV, 2011
Keywords
injection molding, nanocomposites, wheat gluten, montmorillonite, mechanical properties, Energi och material
National Category
Polymer Chemistry Materials Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-2972 (URN)10.1016/j.ijbiomac.2010.10.012 (DOI)2320/7330 (Local ID)2320/7330 (Archive number)2320/7330 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-11-16Bibliographically approved
Granström, J., Gällstedt, M., Arias, O., Blomfeldt, T., Sojoudi, H., Kim, Y., . . . Hedenqvist, M. (2011). Measurement technologies and encapsulation approaches for multi-layer barrier films. In: : . Paper presented at Nordic Polymer Days 2011, Stockholm, SWEDEN, June 15-17, 2011.
Open this publication in new window or tab >>Measurement technologies and encapsulation approaches for multi-layer barrier films
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2011 (English)Conference paper, Published paper (Other academic)
Keywords
film architecture, spacer, barrier, encapsulation, Energi och material
National Category
Materials Engineering
Identifiers
urn:nbn:se:hb:diva-6623 (URN)2320/9431 (Local ID)2320/9431 (Archive number)2320/9431 (OAI)
Conference
Nordic Polymer Days 2011, Stockholm, SWEDEN, June 15-17, 2011
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2017-02-02Bibliographically approved
Cho, S.-W., Persson, M. & Skrifvars, M. (2011). Melt spun fibres of poly(lactic acid) and hydroxyapatite nanoparticles for use as tissue engineering scaffolds. In: : . Paper presented at 19th BEPS Annual Meeting, Vienna, AUSTRIA, September 28-30, 2011.
Open this publication in new window or tab >>Melt spun fibres of poly(lactic acid) and hydroxyapatite nanoparticles for use as tissue engineering scaffolds
2011 (English)Conference paper, Published paper (Refereed)
Keywords
melt spinning, poly(lactic acid), hydroxyapatite, scaffolds, Energi och material
National Category
Materials Engineering Polymer Chemistry
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-6614 (URN)2320/9219 (Local ID)2320/9219 (Archive number)2320/9219 (OAI)
Conference
19th BEPS Annual Meeting, Vienna, AUSTRIA, September 28-30, 2011
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2016-11-20Bibliographically approved
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