Figure - uploaded by George Epurescu
Content may be subject to copyright.
Source publication
Formulations incorporating benzophenone oligodimethacrylate (BP-DMA) and
graphene structures (graphene oxide/GO, reduced graphene oxide/RGO) were
exposed to UV/vis irradiation or femtosecond laser beam to achieve hybrid
composites. All structures were characterized through various methods
including 1H NMR and FTIR spectroscopies, optical microscopy...
Similar publications
Poly(para-phenylene vinylene) (PPV) is a key material for optoelectronics because it combines the potential of both polymers and semiconductors. PPV has been synthesized via solution-processable precursor route, in which the precursor polymer poly(xylene tetrahydrothiophenium chloride) (PTHT) is thermally converted to PPV throughout the sample as a...
Leveraging developments in microfabrication open new possibilities for optical manipulation. With the structural design freedom from three-dimensional printing capabilities of two-photon polymerization, we are starting to see the emergence of cleverly shaped ‘light robots’ or optically actuated micro-tools that closely resemble their macroscopic co...
We report on the realization of functional infrared light concentrators based on a thick layer of air-polymer metamaterial with controlled pore size gradients. The design features an optimum gradient index profile leading to light focusing in the Fresnel zone of the structures for two selected operating wavelength domains near 5.6 and 10.4 μm. The...
The success of ocean observation relies on effective monitoring technologies with increased functionalities, minimized size, and reduced cost. In this study, opto-microfluidic devices for sensing the salinity and temperature of sea water are proposed and demonstrated, which can be prepared with ultrafast laser fabrication and two-photon polymerizat...
Citations
... The GO was synthesized by Hummers' modified method [16,18,19] from graphite commercial grade -ALFA AESAR with particles under 44 microns and 99.99 % purity. ...
HYBRID NANOCOMPOSITE RGO/ZnO AS SENZING MATERIAL
This study presents the synthesis and characterization of nanocomposite materials based on ZnO and reduced graphene oxide used as sensing material with application in NOx detection at room temperature.
2020 7th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE), 12-14 November 2020, Ruse, Bulgaria.
978-1-7281-0362-4/20/$31.00 2020 IEEE
Vat photopolymerization prepared elastomers usually exhibit unsatisfied mechanical properties due to their insufficient growth of molecular weight upon UV exposure. Increasing the weight ratio of oligomer in the resin system is an effective approach to enhance the mechanical properties, yet the viscosity of the UV‐curable resin increased dramatically which makes it difficult to be used. Here, a linear scan‐based vat photopolymerization (LSVP) system which can print high‐viscosity resin was carried out to 3D print the oligomer‐dominated UV‐curable resin via a dual‐curing mechanism. Briefly, a polyurethane methacrylate blocking (PUB) oligomer is first synthesized and then mixed with a commercialized bifunctional oligomer, photoinitiator, and primary amine as a chain extender to prepare high‐viscosity UV‐curable resin for LSVP system. Through thermal treatment, deblocked isocyanate is further crosslinked with a chain extender to construct a highly entangled polymer chain network. The optimal thermal treatment parameters are investigated. Simultaneously, the resilience of the 3D‐printed elastomer was evaluated by continuous tensile loading and unloading tests. Subsequently, complex structured elastomers were printed, exhibiting favorable mechanical durability without defects. The results obtained from this work will provide a reference for preparing elastomeric devices with excellent physical properties and expand the application fields of vat photopolymerization.
This article is protected by copyright. All rights reserved
