TY - CONF A1 - Priebe, Nsesheye Susan A1 - Gluth, Gregor A1 - Simon, Sebastian A1 - Schröder, H.-J. A1 - Kühne, Hans-Carsten T1 - Evaluation of brick clays from various deposits in central Germany for use as SCMs N2 - The development of low carbon cements has gained great importance over the last decades. In the effort to limit the carbon content related to its production, cement is often replaced with supplementary cementitious materials (SCMs). Commonly used SCMs such as fly ash and slag have undergone extensive research, but are currently limited in supply and availability. Among the researched SCMs, calcined clays have proven to be a suitable alternative pozzolan due to their worldwide availability and extremely low calcination temperatures when compared to clinker. This poster presents the results from an ongoing project, aimed at obtaining pozzolans, available in sufficient quantities for Portland-pozzolana cement production in Germany. The poster shows the analyses of seven brick clays from various deposits in central Germany. The chemical and mineral composition of the brick clays was evaluated through inductively coupled plasma – optical emission spectroscopy (ICP-OES), X-ray diffraction (XRD), and thermogravimetric analysis (TG/DTG). The particle size distribution (PSD) was also evaluated by laser granulometry. The results show that the brick clays contain a substantial amount of kaolinite, illite and smectite minerals, the relative proportions differing significantly between deposits. The suitable calcination temperature range of the clays is also evaluated through TG/DTG analysis to obtain the optimum degree of dehydroxylation from which the bricks clays can be suitable for use as a pozzolan. T2 - 2nd International Conference on Calcined Clays for Sustainable Concrete CY - Havana City, Cuba DA - 04.12.2017 KW - Cement KW - CO2 reduction KW - Supplementary cementitious materials KW - Calcined clay KW - Kaolinite KW - Illite KW - Smectite PY - 2017 N1 - Geburtsname von Priebe, Nsesheye Susan: Msinjili, N. S. - Birth name of Priebe, Nsesheye Susan: Msinjili, N. S. AN - OPUS4-43719 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schmidt, R. A1 - Hodoroaba, Vasile-Dan T1 - SEM or TEM for the characterization of nanoparticles? N2 - Scanning Electron Microscopy (SEM) or Transmission Electron Microscopy (TEM) ? This is a question, nowadays discussed in EM labs of research and industry involved in the characterization and metrology of nanoparticles. The Scanning principle is adapted to TEM, the Transmission mode is adapted to Ultra High Resolution SEM. Can modern SEM replace TEM, reach atomic resolution even without Cs corrector or nm lateral resolution for energydispersive X-ray spectroscopy (EDX)? Due to the development of a New Cold Field Emission (NCFE) electron source Hitachi SEMs SU9000 and SU8200 can deliver routinely sub-nm image resolution and EDX mappings at very high count rates and a lateral EDX resolution of a few nm. A TiO2 sample provided by BAM was analysed at 30kV using low kV STEM – simultaneously with the Through-the-lens (TTL) SE detector, the Bright Field transmitted and Dark Field transmitted signals. By this method a pixel precise information of the particles surface using SE, its chemical nature using DF-STEM and its crystalline structure using Bright Field signal is given in one 40sec scan. The advantage of this observation mode compared to Ultra Low Voltage imaging is outlined. T2 - Microscopy Conference 2017 CY - Lausanne, Switzerland DA - 21.08.2017 KW - SEM KW - TEM KW - Nanoparticles PY - 2017 UR - http://www.mc2017.ch/ AN - OPUS4-43890 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reuther, R. A1 - Marvin, H. A1 - Müller, P. A1 - Löschner, K. A1 - Hodoroaba, Vasile-Dan A1 - Stintz, M. A1 - Kammer, F. v. d. A1 - Köber, R. A1 - Rauscher, H. T1 - A new tiered analytical approach and e-Tool for material classification to support the implementation of the EU Nano-Definition N2 - The EC recommendation for the definition of nanomaterial [2011/696/EU] requires the quantitative size determination of constituent particles in samples down to 1 nm. Accordingly, a material is a nanomaterial if 50 % or more of the particles are in the size range 1-100 nm. The fact that engineered nanomaterials already exist in many industrial and consumer products challenges the development of measurement methods to reliably identify, characterize and quantify their occurrence as substance and in various matrices. The EU FP7 NanoDefine project [www.nanodefine.eu] has addressed this challenge by developing a robust, readily implementable and cost-effective measurement strategy to obtain quantitative particle size distributions and to distinguish between nano and non-nano materials according to the EU definition. Based on a comprehensive evaluation of existing methodologies and intra- and inter-lab comparisons, validated measurement methods and instrument calibration procedures have been established to reliably measure the size of particles within 1-100 nm, and beyond, including different shapes, coatings and chemical compositions in industrial materials and consumer products. Case studies prove their applicability for various sectors, including food, pigments and cosmetics. Main outcome is the establishment of an integrated tiered approach including rapid screening (tier 1) and confirmatory methods (tier 2), and a user manual to guide end-users, such as manufacturers, in selecting appropriate methods. Another main product is the “NanoDefiner” e-Tool allowing the standardised / semi-automated selection of appropriate methods for material classification according to the EU definition. Results also contribute to standardization efforts, such as CEN TC 352 or ISO TC 229. T2 - EuroNanoForum 2017 CY - Valletta, Malta DA - 21.06.2017 KW - Nanomaterial classification KW - Nanoparticles KW - EC definition of nanomaterial KW - Tiered approach PY - 2017 UR - http://euronanoforum2017.eu/ AN - OPUS4-43993 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Haferkamp, Sebastian A1 - Fischer, Franziska A1 - Kraus, Werner A1 - Emmerling, Franziska T1 - In situ monitoring of a mechanochemical Knoevenagel condensation N2 - Mechanaochemistry is an effective method to yield pure compounds within a short reaction time. Mechanochemical C-C bond forming reactions gained increasing interest in the past decade. Among those the Knoevenagel condensation is an important reaction for synthezing a,b-unsaturated compounds. The information on the underlying mechanisms of mechanochemical reactions are scarce. In situ investigations using Raman spectroscopy and synchroton XRD either alone or in combination address this challenge. We present the in situ results of a Knoevenagel condensation with p-nitrobenzaldehyde and malononitrile under neat grinding conditions. T2 - BESSY II User Meeting CY - Berlin, Germany DA - 13.12.2017 KW - Mechanochemistry KW - In situ KW - Knoevenagel condensation KW - C-C coupling PY - 2017 AN - OPUS4-44142 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Haferkamp, Sebastian A1 - Fischer, Franziska A1 - Kraus, Werner A1 - Emmerling, Franziska T1 - In situ monitoring of mechanochemical Knoevenagel condensations N2 - Mechanaochemistry is an effective method to yield pure compounds within a short reaction time. Mechanochemical C-C bond forming reactions gained increasing interest in the past decade. Among those the Knoevenagel condensation is an important reaction for synthezing a,b-unsaturated compounds. The information on the underlying mechanisms of mechanochemical reactions are scarce. In situ investigations using Raman spectroscopy and synchroton XRD either alone or in combination address this challenge. We present the in situ results of a Knoevenagel condensation with p-nitrobenzaldehyde and malononitrile under neat grinding conditions. T2 - Adlershofer Forschungsforum CY - Berlin, Germany DA - 10.11.2017 KW - Mechanochemistry KW - Knoevenagel condensation PY - 2017 AN - OPUS4-44140 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Haferkamp, Sebastian A1 - Fischer, Franziska A1 - Kraus, Werner A1 - Emmerling, Franziska T1 - In situ investigation of a mechanochemical Knoevenagel condensation N2 - Mechanaochemistry is an effective method to yield pure compounds within a short reaction time. Mechanochemical C-C bond forming reactions gained increasing interest in the past decade. Among those the Knoevenagel condensation is an important reaction for synthezing a,b-unsaturated compounds. The information on the underlying mechanisms of mechanochemical reactions are scarce. In situ investigations using Raman spectroscopy and synchroton XRD either alone or in combination address this challenge. We present the in situ results of a Knoevenagel condensation with p-nitrobenzaldehyde and malononitrile under neat grinding conditions. T2 - PRORA CY - Berlin, Germany DA - 30.11.2017 KW - C-C coupling KW - Knoevenagel condensation KW - In situ PY - 2017 AN - OPUS4-44141 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Koch, Claudia T1 - Standardization in emerging technologies - The case of additive manufacturing N2 - Additive Manufacturing provides an important enabling technology for the digital transformation of the economy. As an emerging technology it has seen a remarkable development over the last three decades. Nevertheless, it is far from a broad adoption with several barriers to overcome yet. One of the major challenges is the lack of standards. The critical role of standardization for innovation is generally recognized, still the topic too often has been neglected in strategic roadmapping exercises for emerging technologies. Too little is known about the complex dynamics and interrelations of standardization and innovation. The anticipation of standardization needs and the timely and efficient implementation of standards is challenging. This paper aims at contributing to a better understanding of the role that standards play in the multi-dimensional system of innovation. It analyzes the trajectories of innovation in Additive Manufacturing in a systematic and holistic way, focusing on standardization activities with regard to coordination, stakeholders involved, the timing and types of standards developed. Putting standardization in context of the multi-dimensional innovation system of Additive Manufacturing the research shows where standards can support the diffusion of an emerging technology. T2 - ITU Kaleidoscope Academic Conference: Challenges for a data-driven society CY - Nanjing, China DA - 27.11.2017 KW - 3D-Printing KW - Additive Manufacturing KW - Emerging technologies KW - Standardization KW - Standards KW - Technological innovation PY - 2017 AN - OPUS4-49082 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Wu, Cheng-Chieh A1 - Neumann, Patrick P. A1 - Hüllmann, Dino A1 - Krentel, Daniel A1 - Kluge, Martin A1 - Kohlhoff, Harald A1 - Lilienthal, A.J. T1 - Airborne remote gas sensing and mapping N2 - Leaking methane (CH4) from infrastructures, such as pipelines and landfills, is critical for the environment but can also pose a safety risk. To enable a fast detection and localization of these kind of leaks, we developed a novel robotic platform for aerial remote gas sensing. Spectroscopic measurement methods for remote sensing of selected gases lend themselves for use on mini-copters, which offer a number of advantages for inspection and surveillance over traditional methods. No direct contact with the target gas is needed and thus the influence of the aerial platform on the measured gas plume can be kept to a minimum. This allows to overcome one of the major issues with gas-sensitive mini-copters. On the other hand, remote gas sensors, most prominently Tunable Diode Laser Absorption Spectroscopy (TDLAS) sensors have been too bulky given the payload and energy restrictions of mini-copters. Here, we present the Unmanned Aerial Vehicle for Remote Gas Sensing (UAV-REGAS), which combines a novel lightweight TDLAS sensor with a 3-axis aerial stabilization gimbal for aiming on a versatile hexacopter. The proposed system can be deployed in scenarios that cannot be addressed by currently available robots and thus constitutes a significant step forward for the field of Mobile Robot Olfaction (MRO). It enables tomographic reconstruction of gas plumes and a localization of gas sources. We also present first results showing its performance under realistic conditions. T2 - 5th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2019) CY - Potsdam, Germany DA - 27.08.2019 KW - Localization of gas sources KW - Mobile Robot Olfaction KW - Tomographic reconstruction of gas plumes KW - Tunable Diode Laser Absorption Spectroscopy (TDLAS) KW - UAV-REGAS PY - 2017 AN - OPUS4-48789 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Asadujjaman, Asad A1 - Ahmadi, Vahid A1 - Yalcin, M. A1 - ten Brummelhuis, N. A1 - Bertin, Annabelle T1 - Functional polymer based on 2,6-diaminopyridine with tunable UCST behaviour in water/alcohol mixture N2 - Thermoresponsive polymers are of great importance in numerous applications such as bioseparation, drug delivery, diagnostic and microfluidic applications.[1-2] Only a few thermoresponsive polymers have been reported that present an Upper Critical Solution Temperature (UCST), i.e. phase separate from solution upon cooling, in a relevant temperature range and “green” solvents such as water or ethanol.[3] Indeed, polymers with UCST behavior below 60°C in alcohol or water/alcohol mixtures are extremely promising for the preparation of “smart” materials for sensing. In this work, two novel functional polymers of based on a 2,6-diaminopyridine motif were synthesized by free-radical polymerization. Their UCST-type transition temperature is tunable by varying either their concentration in solution or the type of solvent. Insights into this phenomenon are investigated using turbidimetry and temperature dependent dynamic light scattering. T2 - Konferenz CY - Lisbon, Portugal DA - 06.03.2017 KW - Thermoresponsive polymers KW - UCST-type polymers PY - 2017 AN - OPUS4-39579 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Asadujjaman, Asad A1 - Wagner, Sabine A1 - Rurack, Knut A1 - Bertin, Annabelle T1 - Switching of nanoparticles' fluorescence between "ON" and "OFF" states by a thermoresponsive polymeric layer N2 - Fluorescent nanoparticles that “light up”/”dim down” by applying external stimuli are of particular interest in the fields of sensing, diagnostics, photonics, protective coatings and microfluidics. The current challenge for these materials is to combine for instance fluorescence and its response to a stimulus such as temperature in a precise manner. Here we present such a system based on a core/shell/shell architecture consisting of a silica core with a fluorescent layer and a thermoresponsive shell. The silica core nanoparticles were first coated with a fluorescent shell using surface initiated reversible addition-fragmentation chain transfer (RAFT) polymerization. The fluorescent nanoparticles were then completely engulfed by a switchable protective coating made of thermoresponsive poly(N-isopropylacrylamide). The fluorescence of the nanoparticles could be “switched on” at room temperature and “switched off” with increasing environmental temperature because of the presence of the thermoresponsive layer. Insights into this phenomenon will be given based on temperature dependent fluorescence measurements and dynamic light scattering. T2 - Hybrid materials Konferenz CY - Lisbon, Portugal DA - 06.03.2017 KW - Core/shell/shell KW - Thermoresponsive polymers KW - Fluorescence materials PY - 2017 AN - OPUS4-39581 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -