Search results for " tecnologia."
showing 10 items of 1339 documents
Environmentally Friendly Composites and Surface Treatments for Metal-to-Composite Hybrid Joints for Marine Application
2022
In this study, the use of natural fibres (flax and basalt) in combination with a recyclable epoxy matrix based on cleavable amines is suggested for improving the sustainability of marine industry. In addition, a new and eco-friendly anodizing process based on tartaric sulfuric acid solution (TSA) and a pore widening step in a NaOH aqueous solution was carried out on aluminium alloy (AA5083) to evaluate its effect on the adhesion strength and damage tolerance after low velocity impact of co-cured adhesive joints with a basalt fibre reinforced and recyclable laminate. The durability in marine environment was simulated by exposing samples to salt-fog spray conditions over a period of 90 days. …
FORMULAZIONE DI INCAPSULANTI POLIMERICI PER MODULI FOTOVOLTAICI BIFACCIALI HJT
2022
Il crescente interesse per la salvaguardia dell’ambiente, principalmente motivato dai disastri naturali che sono incorsi numerosi nell’ultimo ventennio, ha dato un’ulteriore spinta alla ricerca sulle fonti di energia “green” rinnovabile non derivanti da combustibili fossili, che permetta all’uomo di continuare a provvedere ai propri fabbisogni in maniera più “rispettosa”. Infatti, le fonti energetiche rinnovabili che il nostro pianeta ci mette a disposizione sono innumerevoli: dall’energia meccanica ed elettrica prodotta dal vento, alle biomasse, la cui combustione in appositi impianti permette generazione termica e cogenerazione di calore ed elettricità; l’energia prodotta dalle maree e da…
La caratterizzazione delle malte dell'acquedotto Cornelio di Termini Imerese
2008
PREPARATION OF THERMOPLASTIC MATERIALS FOR BIOMEDICAL APPLICATIONS
2012
Reprocessing of polyethyleneterephthalate and characterisation of monopolymer blends of virgin and recycled polymers
1997
Recycling of polyethyleneterephthalate (PET from bottles is considered by changing both reprocessing machines and the effect of humidity. The rheological and mechanical properties of this recycled material remain very close to that of the virgin material provided that a careful drying is carried out before any melt operation. The reprocessing has been carried out mainly in view of the use of this secondary material in blends with virgin PET-monopolymer or homopolymer blends. Indeed, this use is a common industrial practice to reuse plastic scraps. Most monopolymer blends show properties between those of the two components but in some cases lower than those expected on the basis of an additi…
PREPARAZIONE DI MATERIALI POLIMERICI MULTIFUNZIONALI A BASE DI NANOTUBI DI CARBONIO
2012
Calcestruzzi delle Aviorimesse per Idrovolanti di Pier Luigi Nervi a Marsala (1940-41). Composizione e Tessitura
2008
Wet electrospinning-aided self-assembly of multifunctional GO-CNT@PCL core-shell nanocomposites with spider leg bioinspired hierarchical architectures
2022
We report a fast route enabling the multiscale design of nanohybrid structures comprising a 3D fibrous network of polycaprolactone (PCL) wrapped by graphene oxide (GO) sheets onto which carbon nanotube (CNT) brushes are anchored. The method relies on electrospinning PCL solutions onto a suspension of GO and CNTs in ethanol. Self-assembly is due to electrostatic wrapping of GO sheets around PCL fibers and 7C-7C stacking between GO and CNTs. Hierarchical architecture and nanopatterned surface allow gathering the starting properties of PCL, GO and CNTs into lightweight (99% porosity) yet robust (1575% stiffness improvement), amphiphilic monoliths that can remove methylene blue and/or methyl or…
PCL/PEG based membranes for bacterial cells immobilization stimulate actinorhodin antibiotic production in S. coelicolor
2015
The actinomycetes, Gram-positive filamentous bacteria, are the most prolific source of natural antibiotics. At industrial level, antibiotics from actinomycetes are usually produced at low levels by mean of fermentative processes in submerged cultivations, where one of the major factors negatively affecting bioproductivity is the phenomenon of a pellet-shaped biomass growth. The strategies based on cell-immobilization, which were already proven improving bacterial bioprocess productivity, could stimulate antibiotic production in actinomycetes.