TY - CONF A1 - Kalinka, Gerhard T1 - Einzelfaserausdrück und -durchdrückversuche T2 - Wissenschaftskolloquium "Nanotechnologie für Kunststoffverbunde", Haus der Wissenschaft, Veranstalter: Virtuelles Institut Nanotechnologie in Polymer Composites CY - Braunschweig, Deutschland DA - 2014-09-30 PY - 2014 AN - OPUS4-32040 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Carbonfaserverstärkte Polymere als Energiespeicher T2 - 47. Metallurgisches Seminar "Materialien für die Energieerzeugung, -nutzung und -speicherung" CY - Wernigerode, Deutschland DA - 2014-11-11 PY - 2014 AN - OPUS4-32041 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Prüfung der Faser-Matrix-Wechselwirkung in Kompositen mittels Einzelfaser push- und pull-out Methoden T2 - 4. Wildauer Duromer-Tagung, TH Wildau CY - Wildau, Deutschland DA - 2014-03-03 PY - 2014 AN - OPUS4-32036 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Mechanical characterization of the fiber-matrix interface in brittle and ductile polymers by using pull-out and push-out tests T2 - COMPO2014 Nanocomposites&Biocomposites, Weizmann Institute of Science CY - Rehovot, Israel DA - 2014-04-28 PY - 2014 AN - OPUS4-32037 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Was war die Schadensursache - was der Folgeschaden? T2 - polymertec 14 gemeinsam mit 14. Problemseminar "Deformation und Bruchverhalten von Kunststoffen", Hochschule Merseburg CY - Merseburg, Deutschland DA - 2014-06-25 PY - 2014 AN - OPUS4-32038 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Verbundwerkstoffe als Energiespeicher T2 - 4. Umwelt- und Technologietag, Fa. Brose CY - Coburg, Deutschland DA - 2014-09-25 PY - 2014 AN - OPUS4-32039 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Shirshova, N. A1 - Bismarck, A. A1 - Carreyette, S. A1 - Fontana, Q.P.V. A1 - Greenhalgh, E.S. A1 - Jacobsson, P. A1 - Johansson, P. A1 - Marczewski, M.J. A1 - Kalinka, Gerhard A1 - Kucernak, A.R.J. A1 - Scheers, J. A1 - Shaffer, M.S.P. A1 - Steinke, J.H.G. A1 - Wienrich, Malte T1 - Structural supercapacitor electrolytes based on bicontinuous ionic liquid-epoxy resin systems N2 - 'Structural electrolytes' retain the desirable mechanical characteristics of structural (epoxy) resins whilst introducing sufficient ionic conductivity to operate as electrolytes in electrochemical devices. Here, a series of ionic liquid–epoxy resin composites were prepared to identify the optimum system microstructure required to achieve a high level of multifunctionality. The ionic conductivity, mechanical properties, thermal stability and morphology of the cured epoxy based structural electrolytes were studied as a function of phase composition for three fully formulated high performance structural epoxy systems. At only 30 wt% of structural resin and 70 wt% of ionic liquid based electrolyte, stiff monolithic plaques with thicknesses of 2–3 mm were obtained with a room temperature ionic conductivity of 0.8 mS cm-1 and a Young's modulus of 0.2 GPa. This promising performance can be attributed to a long characteristic length scale spinodal microstructure, suggesting routes to further optimisation in the future. KW - Epoxy KW - Ionic liquid KW - Supercapacitor PY - 2013 DO - https://doi.org/10.1039/c3ta13163g SN - 2050-7496 SN - 2050-7488 VL - 1 IS - 48 SP - 15300 EP - 15309 PB - RSC CY - London [u.a.] AN - OPUS4-29735 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kalinka, Gerhard A1 - ElAbshihy, K. T1 - Circumventing boundary effects while characterizing epoxy/copper interphases using nanoindentation N2 - Characterization of the size and mechanical properties of interphases is essential when designing multicomponent materials. When nanoindentation is used to investigate the size and mechanical properties of an interphase, a common challenge is that the indenter or the stress zone formed around it are often restricted by the reinforcement, making it difficult to distinguish the mechanical property variations caused by the interphase itself from those caused by the boundary effect. In this work, a testing system was developed that allows determining the indent affected zone and accounting for it in the interphase measurements of an epoxy/Cu system. Using finite element analysis, we confirmed the validity of the proposed system. Nanoindentation was used to investigate the Interphase between copper and two different epoxy systems; amine-cured and anhydride-cured. Nanoindentation results showed that a copper layer that is only 10 nm thick still exhibits a constriction effect on the indentations in its vicinity. The amine-cured epoxy did not show any sign of interphase existence using the introduced method. However, a soft interphase with a thickness of ~1.7 μm was measured on theanhydride-cured epoxy. Furthermore, we show that the proposed system can be used to determine the interphase thickness as well as its relative mechanical properties regardless of the indentation depth. This system can be further used for investigating other polymer/metal interphases to better understand the factors influencing them, thus helping engineer the interphase size and properties to enhance composite performance. KW - Interphase KW - Polymer-metal KW - Epoxy KW - Copper KW - Composites KW - Nanoindentation PY - 2017 DO - https://doi.org/10.1080/09276440.2017.1286878 SN - 0927-6440 SN - 1568-5543 VL - 24 IS - 9 SP - 833 EP - 848 PB - Taylor & Francis CY - UK AN - OPUS4-39128 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Sonderprüfverfahren für Verbundwerkstoffe T2 - Vortragsveranstaltung VDI-AK Kunststofftechnik, BV BB an der TU Berlin CY - Berlin, Deutschland DA - 2011-03-17 PY - 2011 AN - OPUS4-34456 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Qian, H. A1 - Kalinka, Gerhard A1 - Chan, K.L.A. A1 - Kazarian, S.G. A1 - Greenhalgh, E.S. A1 - Bismarck, A. A1 - Shaffer, M.S.P. T1 - Mapping local microstructure and mechanical performance around carbon nanotube grafted silica fibres: Methodologies for hierarchical composites N2 - The introduction of carbon nanotubes (CNTs) modifies bulk polymer properties, depending on intrinsic quality, dispersion, alignment, interfacial chemistry and mechanical properties of the nanofiller. These effects can be exploited to enhance the matrices of conventional microscale fibre-reinforced polymer composites, by using primary reinforcing fibres grafted with CNTs. This paper presents a methodology that combines atomic force microscopy, polarised Raman spectroscopy, and nanoindentation techniques, to study the distribution, alignment and orientation of CNTs in the vicinity of epoxy-embedded micrometre-scale silica fibres, as well as, the resulting local mechanical properties of the matrix. Raman maps of key features in the CNT spectra clearly show the CNT distribution and orientation, including a ‘parted’ morphology associated with long grafted CNTs. The hardness and indentation modulus of the epoxy matrix were improved locally by 28% and 24%, respectively, due to the reinforcing effects of CNTs. Moreover, a slower stress relaxation was observed in the epoxy region containing CNTs, which may be due to restricted molecular mobility of the matrix. The proposed methodology is likely to be relevant to further studies of nanocomposites and hierarchical composites. KW - Nanotubes KW - Silica fibres KW - Nano indentation KW - Mapping PY - 2011 DO - https://doi.org/10.1039/c1nr10497g SN - 2040-3364 SN - 2040-3372 VL - 3 IS - 11 SP - 4759 EP - 4767 PB - RSC Publ. CY - Cambridge AN - OPUS4-34718 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kalinka, Gerhard T1 - Mechanische Eigenschaften des Faser/Matrix Interfaces in Verbundwerkstoffen T2 - ILA 2010-Berlin Airshow, Konferenz: Composites in der Luft- und Raumfahrt CY - Berlin, Germany DA - 2010-06-08 PY - 2010 AN - OPUS4-21415 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -