Thermal and electrical behaviors of a poly(epoxy) coating with high electrical conductivity used for aeronautic applications are investigated. The poly(epoxy) used is designed for resin transfer molding (RTM) applications, it have a low viscosity at room temperature (around 1 Pa s) and a high T g (>160 C). This study details the influence of silver nanowires with a high aspect ratio, on the thermal behavior such as the relative degree of reaction α and the kinetics parameters thanks to dynamic and isothermal differential scanning calorimetry. Conductivity measurements of surface and volume have permitted to determine a very low percolation threshold at around 0.7% in volume. The value of electrical conductivity above the percolation threshold is upper than 10 2 S m −1 and the lowest surface resistivity was measured around 13 mΩ sq −1 both for 8% in volume of AgNWs. This kind of coating has a great interest for lightning strike protection of aircraft parts due to the high electrical conductivity obtained with a low overweight.

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A new kind of high electrical conductive epoxy coating with low filler rate was investigated for lightning strike protection (LSP) of carbon fiber reinforced polymer (CFRP). The coating without CFRP substrate was firstly studied. The influence of silver submicronic wires (AgSWs) with a high aspect ratio on the electrical behavior is observed; that is, the electrical resistivity evolution, the current density value, and the electrical conduction mechanisms as function of temperature. The preponderant electrical conduction mechanism is an Ohmic behavior. The higher level of conductivity obtained is 5.5 × 105 S m−1 for 9% vol of AgSWs. Lightning strike tests were carried out on an epoxy/AgSWs coating filled with 8% in volume (74 gsm) and deposited on a CFRP. The ultrasonic testing after lightning strike on coated CFRP shows no structural delamination and demonstrates the interest of this new route for an efficient LSP. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48700.

The aim of this work is to study electrically conductive composites from an epoxy matrix loaded with silver nanowires (AgNWs). Dynamic mechanical analysis (DMA) and dynamic dielectric spectroscopy (DDS) were used to study the molecular mobility of the epoxy matrix and its epoxy/AgNWs composites. The influence of the epoxy/amine ratio on the macroscopic properties was analyzed. The loss modulus of the epoxy matrix highlights two major relaxations, β and α. The β relaxation is due to the localized mobility initiated by hydroxyl groups. The α trelaxation is the anelastic effect liberated at the glass transition. The introduction of a small amount of AgNWs (<8 vol%) has practically no influence on the mechanical properties of the glassy state. For the rubbery state, AgNWs cause an increase in the storage modulus as a function of the filler content. The loss modulus profile is modified: The 0.25emω relaxation due to heterogeneities of the 3D network is observed independently from the hydration level of composites. The magnitude of the α mode is increased due to the stick–slip phenomenon. Moreover, it is shifted toward lower temperatures upon the introduction of AgNWs. In other words, the activation enthalpy decreases for both modes. Electrical study through DDS and conductivity measurement of epoxy/AgNWs composites shows the consequence of a lower relative degree of conversion caused by the insertion of AgNWs. Epoxy/AgNWs composites allow us to obtain one of the highest values of the electrical conductivity for polymer‐based composites without any drastic evolution of mechanical properties.

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SummaryIn the year 2002 a start was made in the Spaarne hospital with the development of an electronic patient file (EPF). We are using the Norma EPF software. Each discipline developed its own database and EPF sheets. After a phase of development and testing we gradually started with the implementation, with the result that we are working without paper and archives since mid 2004. The Spaarne hospital was and is the first hospital in the Netherlands with a complete EPF used in all outpatient clinics. Extra demands are made for medical equipment to be able to communicate and synchronise with the EPF. We made a connection with Growth Analyser (Dutch Growth Foundation) for the growth charts. Security measures are very important to prevent viruses and hackers from intruding, as we have experienced during a major disturbance of our computer network, caused by a virus. The privacy of the patient and his medical records must be guarded with care. It is a great advantage that an EPF is available anywhere in the hospital. This has a benefit for the patient, because the physician will always have access to his files. Other advantages are the flexibility of the system and the timesaving of the correspondence. Disadvantages are the dependence on the computer network, typing qualities and the poor readability of scanned files. The introduction of EPF in our hospital has led to a change in dealing with medical information; a 100% availability of the EPF is now expected and has the consequence that doctors can provide quicker and better care. Samenvatting In 2002 werd in het Spaarne Ziekenhuis gestart met de ontwikkeling van een elektronisch patie¨n-tendossier (EPD). Er wordt gebruikgemaakt van het Norma EPD. Iedere vakgroep ontwikkelde zijn eigen database en EPD-formulieren. Na een ontwerp-en testfase werd het EPD gefaseerd ingevoerd, zodat sinds medio 2004 volledig penloos en archiefloos wordt gewerkt. Het Spaarne Ziekenhuis was daarmee het eerste ziekenhuis in Nederland waar volledig elektronisch wordt gewerkt op alle poliklinieken. Aan apparatuur voor ondersteunende technieken worden extra eisen gesteld wat betreft de mogelijkheid van koppeling en synchronisatie met het EPD. Voor de groeicurve werd een koppeling gemaakt met de Growth Analyser (Nederlandse Groeistichting). Beveiliging tegen virussen en hackers speelt een belangrijke rol, zoals wij hebben kunnen merken bij een storing in ons computernetwerk veroorzaakt door een virus. De privacy van de patie¨nt en zijn medische gegevens moeten voldoende gewaarborgd kunnen worden. Het is een belangrijk voordeel dat het EPD in het hele ziekenhuis beschikbaar is. Voor de patie¨nt betekent dit dat zijn of haar arts altijd en overal toegang heeft tot het medisch dossier. Andere voordelen zijn de flexibiliteit van het systeem en tijdsbesparing bij de correspondentie. Nadelen zijn de afhankelijkheid van het computernetwerk, eisen aan de typevaardigheid en de matige leesbaarheid van gescande dossiers. Invoer van het EPD heeft in ons ziekenhuis geleid tot een verandering in ...