Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-51156 Zeitschriftenartikel Rienitz, O.; Jährling, R.; Noordmann, J.; Pape, C.; Röhker, K.; Vogl, Jochen; Manzano, J. V. L.; Kozlowski, W.; Caciano de Siena, R.; Marques Rodrigues, J.; Galli, A. H.; Yim, Y.-H.; Lee, K.-S.; Lee, J. H.; Min, H.-S.; Chingbo, C.; Naijie, S.; Qian, W.; Ren, T.; Jun, W.; Tangpaisarnkul, N.; Suzuki, T.; Nonose, N.; Mester, Z.; Yang, L.; Pagliano, E.; Greenberg, P.; Mariassy, M.; Näykki, T.; Cankur, O.; Coskun, F. G.; Ari, B.; Can, S. Z. CCQM-K122 "Anionic impurities and lead in salt solutions" The determination of the mass fractions of bromide, sulfate, and lead as well as the isotopic composition of the lead (expressed as the molar mass and the amount fractions of all four stable lead isotopes) in an aqueous solution of sodium chloride with a mass fraction of 0.15 g/g was the subject of this comparison. Even though the mass fractions ranged from 3 μg/g (bromide) to 50 ng/g (lead), almost all results reported agreed with the according KCRVs. IOP Science 2020 Metrologia 57 1A 8012 10.1088/0026-1394/57/1A/08012 2020-09-09 OPUS4-29272 Beitrag zu einem Tagungsband Greenhalgh, E.S.; Ankersen, J.; Asp, L. E.; Bismarck, A.; Fontana, Q.P.V.; Houlle, M.; Kalinka, Gerhard; Kucernak, A.; Mistry, M.; Nguyen, S.; Qian, H.; Shaffer, M.S.P.; Shirshova, N.; Steinke, J.H.G.; Wienrich, Malte Mechanical and microstructural characterisation of multifunctional structural power composites Although the inherent anisotropy of polymer composites has presented daunting technical challenges, these materials now offer engineers considerable opportunities for efficient structural design. More recently, the advent of multifunctional composites which can fulfill more than one role within a system has attracted considerable interest, providing designers with exciting opportunities to innovate. Of particular interest here are structural power composites, which simultaneously carry mechanical load whilst storing/delivering electrical energy. Although the development of these composites is highly challenging, often with conflicting constituent requirements, the STORAGE consortium has had considerable success in the development of these materials for automotive applications. The focus of this paper is structural supercapacitors, the basic architecture of a single cell of which is shown in Fig. 1. This entails two carbon fibre woven lamina (electrodes) which sandwich a glass fibre woven lamina (separator), all of which is embedded within a multifunctional matrix (electrolyte). This architecture has been the focus of the research to date, leading to components such as that shown in Fig.1 having been fabricated. This paper reports on the mechanical properties and microstructures of the different reinforcement and matrix combinations for structural supercapacitors. Canadian Association for Composite Structures and Materials 2013 ICCM19 - 19th International conference on composite materials (Proceedings) ICCM19 - 19th International conference on composite materials Montreal, Canada 28.07.2013 02.08.2013 2228 2237 2016-02-20 OPUS4-34567 Zeitschriftenartikel Greenhalgh, E.S.; Ankersen, J.; Asp, L. E.; Bismarck, A.; Fontana, Q.P.V.; Houlle, M.; Kalinka, Gerhard; Kucernak, A.; Mistry, M.; Nguyen, S.; Qian, H.; Shaffer, M.S.P.; Shirshova, N.; Steinke, J.H.G.; Wienrich, Malte Mechanical, electrical and microstructural characterisation of multifunctional structural power composites Multifunctional composites which can fulfil more than one role within a system have attracted considerable interest. This work focusses on structural supercapacitors which simultaneously carry mechanical load whilst storing/delivering electrical energy. Critical mechanical properties (in-plane shear and in-plane compression performance) of two monofunctional and four multifunctional materials were characterised, which gave an insight into the relationships between these properties, the microstructures and fracture processes. The reinforcements included baseline T300 fabric, which was then either grafted or sized with carbon nanotubes, whilst the baseline matrix was MTM57, which was blended with ionic liquid and lithium salt (two concentrations) to imbue multifunctionality. The resulting composites exhibited a high degree of matrix heterogeneity, with the ionic liquid phase preferentially forming at the fibres, resulting in poor matrix-dominated properties. However, fibre-dominated properties were not depressed. Thus, it was demonstrated that these materials can now offer weight savings over conventional monofunctional systems when under modest loading. London Sage 2014 Journal of composite materials 1 12 10.1177/0021998314554125 2016-02-20 OPUS4-20121 Posterpräsentation Qian, H. Hierachical composites reinforced with carbon nanotube grafted fibres 2007 MC 8: ADVANCING MATERIALS BY CHEMICAL DESIGN MC 8: ADVANCING MATERIALS BY CHEMICAL DESIGN London, England 2007-05-02 2007-05-05 2016-02-19 OPUS4-34718 Zeitschriftenartikel Qian, H.; Kalinka, Gerhard; Chan, K.L.A.; Kazarian, S.G.; Greenhalgh, E.S.; Bismarck, A.; Shaffer, M.S.P. Mapping local microstructure and mechanical performance around carbon nanotube grafted silica fibres: Methodologies for hierarchical composites 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. Cambridge RSC Publ. 2011 Nanoscale 3 11 4759 4767 10.1039/c1nr10497g 2016-02-20 OPUS4-48095 Zeitschriftenartikel Zhang, R.; Qian, M.; Waske, Anja; Shen, H.; Zhang, X. Investigating the microstructure and magnetic properties of La-Fe-Si microwires during fabrication and heat treatment process In this study, the optimized fabrication and evolution of the microstructure and magnetic Transition behavior of the melt-extraction LaFe11.2Si1.8 microwires have been studied. After the optimization of extraction technique (heating power 22 KW, feeding rate 30-50 mm/s, rotation velocity 1700 r/min), the content of La Fe,Si)13 phase in the as-extracted microwires was 54 wt% due to the high solidification velocity, which was increased to 85 wt% via annealing at 1373 K for 20 min. The amount of La(Fe,Si)13 phase was increased and the composition of La(Fe,Si)13 phase became more homogenized through peritectic reaction and short-distance diffusion in the microwires during annealing process. The coexistence of the nanocrystalline and amorphous structures contributed to the broad magnetic Transition temperature range of the as-extracted and annealed microwires. The annealed microwires exhibited a second-order magnetic transformation behavior and showed a maximum magnetic entropy Change jDSMjmax of 6.2 J/kgK and working temperature interval of 36.0 K under a magnetic field of 20 kOe. Elsevier B.V. 2019 Journal of Alloys and Compounds 794 153 162 10.1016/j.jallcom.2019.04.196 2019-05-29 OPUS4-17817 Zeitschriftenartikel Wagner, M.H.; Wu, W.; Liu, Y.; Qian, Q.; Zhang, Y.; Mielke, Werner Study on Phase Separation of PET/PEN Blends by Dynamic Rheology Blends of poly(ethylene terephthalate) (PET) and poly(ethylene naphthalate) (PEN) were processed into biaxially drawn films, and samples taken from the bi-oriented films were then investigated by dynamic rheology experiments in the melt state. Storage modulus G and loss modulus G were determined in the frequency range of 10-2-102 rad/s at temperatures between 260 and 300°C. Although the time-temperature superposition (TTS) principle was found to hold in the high frequency regime, a breakdown of TTS was observed at low frequencies, and the terminal behavior of the storage modulus G of the blends departs drastically from the terminal behavior observed for the blend components. This is caused by interfacial surface tension effects. The results indicate that despite the effect of transesterification reactions, the PET/PEN blend systems investigated consist of a microseparate phase of PEN platelets in a matrix of PET. This morphology is produced when the blends are processed into biaxially oriented PET/PEN films, and droplets of PEN are deformed into a lamellar structure consisting of parallel and extended, separate layers. The large interfacial surface area of the bi-oriented PET/PEN blends leads to remarkably strong interfacial tension effects in dynamic rheology measurements. Hoboken, NJ Wiley InterScience 2008 Journal of applied polymer science 110 1 177 182 10.1002/app.28156 2016-02-19