Change search
Refine search result
1 - 8 of 8
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Carlson, Tony
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Multi-functional composite materials: CFRP thin film capacitors2011Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The use of lightweight materials in structural applications is ever increasing. Today, lightweight engineering materials are needed to realise greener, safer and more competitive products. A route to achieve this could be to combine more than one primary function in a material or component to create multi-functionality, thus reducing the number of components and ultimately the overall weight. This thesis presents an approach towards realising novel multi-functional polymer composites. A series of structural capacitor materials made from carbon fibre reinforced polymers have been developed, manufactured and tested. In papers I and II, capacitors have been manufactured using different papers and polymer films as dielectric separator employing carbon fibre/epoxy pre-pregs as structural electrodes. Plasma treatment was used as a route for improved epoxy/polymer film adhesion. The manufactured materials were evaluated for mechanical performance by ILSS and tearing tests and electrical performance by measuring capacitance and dielectric breakdown voltage. In paper III the concept was extended in a parametric study using the most promising approach with a polymer film as dielectric separator. Three thicknesses of PET (50, 75 and 125 µm) were used as dielectric separator with carbon fibre/epoxy pre-pregs as structural electrodes. PET was chosen due to availability in different thicknesses as well as the frequent use in ordinary capacitors making it a suitable candidate. As in paper I and II, plasma treatment was used to improve the PET/epoxy adhesion. The capacitor materials were evaluated for mechanical performance by tensile tests and ILSS and for electrical performance by measuring capacitance and dielectric breakdown voltage. The multifunctional materials shows good potential for replacing steel and other materials with lower specific mechanical properties but cannot match the high specific mechanical performance of mono-functional materials. Both mechanical and electrical performance could have large benefits from developing new separator materials adapted for use in multifunctional applications and could be an interesting field for extended research.

  • 2.
    Carlson, Tony
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Multifunctional composite materials: Design, manufacture and experimental characterisation2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The use of lightweight materials in structural applications is ever increasing. Today, lightweight engineering materials are needed to realise greener, safer and more competitive products. A route to achieve this could be to combine more than one primary function in a material or component to create multifunctionality, thus reducing the number of components and ultimately the overall weight. This thesis presents approaches towards realising novel multifunctional polymer composites, which simultaneously can carry mechanical loads and store electrical energy. For this purpose, structural capacitor and battery materials made from carbon fibre reinforced polymers have been developed, manufactured and tested. In papers I and II, structural capacitors have been realised using different papers and polymer films as dielectric separator and employing carbon fibre/epoxy pre-pregs as structural electrodes. Plasma treatment was used as a route for improved epoxy/polymer film adhesion. The manufactured materials were evaluated for mechanical performance by interlaminar shear strength (ILSS) and tearing tests and electrical performance by measuring capacitance and dielectric breakdown voltage.In paper III the concept was extended in a parametric study using the most promising approach with a polymer film as dielectric separator. Three thicknesses of PET (50, 75 and 125 μm) were used as dielectric separator with carbon fibre/epoxy pre-pregs as structural electrodes. Plasma treatment was used to improve the PET/epoxy adhesion. The capacitor materials were evaluated for mechanical performance by tensile and ILSS tests and for electrical performance by measuring capacitance and dielectric breakdown voltage. The multifunctional materials show good potential for replacing steel and other materials with lower specific mechanical properties but cannot match the high specific mechanical performance of monofunctional materials.Paper IV explores the effects of matrix cracking on the structural composite capacitormaterials performance. The structural capacitor materials were made from carbonfibre/epoxy pre-pregs as structural electrodes with thermoplastic PET as dielectricseparator as done in paper III. A method to induce and to measure the effect of matrixcracks on electrical properties was developed and used. The method is based on asimple tensile test and proved to be quick and easy to perform with consistent results.The structural capacitor material was found to maintain its capacitance even aftersignificant intralaminar matrix cracking in the CFRP electrodes from high tensilemechanical loads.Paper V explores another possible route for electrical energy storage in structural composites in the form of structural composite batteries. A laminated design approach would result in too long distances for ion mobility to give any useful energy storage with very low power density. Therefore, the work in this paper was focused on making each individual carbon fibre in a tow into a battery. Thus, realising a large number of batteries connected in parallel within a composite material. This is done by electro polymerisation of a solid polymer electrolyte onto the surface of the carbon fibres. The resulting sleeve of polymer is typically 500 nm thick making it thin enough to achieve useful electrical performance even with the relatively low ion conductivities of the employed solid polymer electrolytes. This paper demonstrates a new way forward to realise intrinsic multifunctional composite battery materials.

  • 3.
    Carlson, Tony
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Asp, Leif
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    An experimental study into the effect of damage on the capacitance of structural composite capacitors2013In: Journal of Multifunctional Composites, ISSN 2168-4246, Vol. 1, no 2, p. 91-97Article in journal (Refereed)
    Abstract [en]

    This paper presents the work to characterise the effects of tensile induced matrix cracks on capacitance of structural composite capacitor materials. The study is based on earlier work within the field of multifunctional materials where mechanical and electrical properties have been characterised. Effects of damage on electrical properties have, however, not been covered by earlier studies. The structural capacitor materials were made from carbon fibre/epoxy pre-pregs as structural electrodes with thermoplastic PET as the dielectric separator. NaOH etching was used as a route for improved adhesion between the epoxy and PET to ensure matrix cracking in the CFRP electrodes occurred prior to delamination between the electrodes and the PET separator. A method to induce and measure the effect of the matrix cracks on electrical properties was successfully developed and used in this study. The method is based on a simple tensile test and proved to be quick and easy to perform with consistent results. The structural capacitor material was found to maintain its capacitance even after significant intralaminar matrix cracking in the CFRP electrodes from high tensile mechanical loads.

  • 4.
    Carlson, Tony
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Asp, Leif
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Carbon fibre composites capacitors for short term electric energy storage in structural applications2011In: 18th International Conference on Composites Materials, ICCM 2011: Jeju; South Korea; 21 August 2011 through 26 August 2011, 2011Conference paper (Refereed)
  • 5.
    Carlson, Tony
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Asp, Leif
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Structural carbon fibre composite/PET capacitors: Effects of dielectric separator thickness2013In: Composites Part B: Engineering, ISSN 1359-8368, E-ISSN 1879-1069, Vol. 49, p. 16-21Article in journal (Refereed)
    Abstract [en]

    This paper presents an approach towards realising novel multifunctional polymer composites with combined structural and electric energy storing ability. A series of structural capacitors were made using three thicknesses of DuPont Mylar A thermoplastic PET as a dielectric separator employing carbon fibre/epoxy pre-pregs as structural electrodes. Plasma treatment was used as a route for improved epoxy/PET adhesion. The manufactured materials were mechanically and electrically tested to evaluate their multifunctional efficiency.The multifunctional materials developed show good potential for replacing steel, aluminium and other materials with lower specific mechanical properties but do not match the high specific mechanical and electrical performance of monofunctional composites and capacitors.

  • 6.
    Carlson, Tony
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Ordéus, Daniel
    Swerea SICOMP AB.
    Wysocki, M.
    Swerea SICOMP AB.
    Asp, Leif
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    CFRP structural capacitor materials for automotive applications2011In: Plastics, rubber and composites, ISSN 1465-8011, E-ISSN 1743-2898, Vol. 40, no 6/7, p. 311-316Article in journal (Refereed)
    Abstract [en]

    In this paper, an approach towards realising novel multifunctional polymer composites is presented. A series of structural capacitor materials made from carbon fibre reinforced polymers have been developed, manufactured and tested. The structural capacitor materials were made from carbon fibre epoxy prepreg woven lamina separated by a polymer film dielectric separator. The structural capacitor multifunctional performance was characterised measuring capacitance, dielectric strength and tearing force. The developed structural carbon fibre reinforced polymer (CFRP) capacitor designs employing polymer film dielectrics (PA, PC and PET) offer remarkable multifunctional potential.

  • 7.
    Carlson, Tony
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Ordéus, Daniel
    Swerea SICOMP AB.
    Wysocki, Maciej
    Swerea SICOMP AB.
    Asp, Leif
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Structural capacitor materials made from carbon fibre epoxy composites2010In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 70, no 7, p. 1135-1140Article in journal (Refereed)
    Abstract [en]

    In this paper an approach towards realising novel multifunctional polymer composites is presented. A series of structural capacitor materials made from carbon fibre reinforced polymers have been developed, manufactured and tested. The structural capacitor materials were made from carbon fibre epoxy pre-preg woven laminae separated by a paper or polymer film dielectric separator. The structural capacitor multifunctional performance was characterised measuring capacitance, dielectric strength and interlaminar shear strength. The developed structural CFRP capacitor designs employing polymer film dielectrics (PA, PC and PET) offer remarkable multifunctional potential.

  • 8.
    Leijonmarck, Simon
    et al.
    Division of Applied Electrochemistry, Department of Chemical Engineering and Technology, KTH Royal Institute of Technology.
    Carlson, Tony
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Lindbergh, Göran
    Division of Applied Electrochemistry, Department of Chemical Engineering and Technology, KTH Royal Institute of Technology.
    Asp, Leif
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Maples, Henry A.
    Polymer & Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London, South Kensington Campus.
    Bismarck, Alexander
    Polymer & Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London, South Kensington Campus.
    Solid polymer electrolyte-coated carbon fibres for structural and novel micro batteries2013In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 89, p. 149-157Article in journal (Refereed)
    Abstract [en]

    We report a method to deposit a thin solid polymer electrolyte (SPE) coating around individual carbon fibres for the realisation of novel battery designs. In this study an electrocoating method is used to coat methacrylate-based solid polymer electrolytes on to carbon fibres. By this approach a dense uniform, apparently pinhole-free, poly(methoxy polyethylene glycol (350) monomethacrylate) coating with an average coating thickness of 470 nm was deposited around carbon fibres. Li-triflate, used as supporting electrolyte remained in the coating after the electrocoating operation. The Li-ion content in the solid polymer coating was found to be sufficiently high for battery applications. A battery device was built employing the SPE coated carbon fibres as negative electrode demonstrating reversible specific capacity of 260 mAh/g at low currents (C/10), suggesting that these coated carbon fibres can be employed in future structural composite batteries.

1 - 8 of 8
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf