E12: Compozite și Nanocompozite polimerice
Activitatea de cercetare a Echipei 12 – Compozite şi nanocompozite polimerice este orientată pe dezvoltarea de compozite şi nanocompozite polimerice multifuncţionale pe bază de polimeri sintetici şi/sau naturali şi diferite micro/nano umpluturi sintetice şi/sau naturale, cu impact redus asupra mediului sau biodegradabile şi cu proprietăţi specifice ȋmbunătăţite, impuse de diverse utilizări ȋn industrie (auto şi ambalaje), construcţii, agricultură şi biomedicină. In consecinţă, direcţiile de cercetare luate ȋn considerare sunt axate, pe de o parte, pe caracterizarea, modificarea fizică sau chimică și prelucrarea, atât a componentelor, cât și a (nano)compozitelor rezultate, iar pe de alta parte, pe procedeele de obținere și mecanismele de interacțiune. Principalele obiective ale cercetării Echipei 12 constau ȋn ȋmbunătăţirea prelucrabilităţii şi ȋnlocuirea, pe cât posibil, a aditivilor toxici și a polimerilor sintetici cu materiale izolate din resurse naturale și regenerabile. In ultimii 10 de ani, ȋn cadrul unor proiecte naţionale şi europene (PC6, PC7 şi Orizont 2020), Echipa 12 a dobândit cunoştinţe şi a câştigat experienţă ȋn dezvoltarea unor tehnologii de obţinere a unor (nano)compozite, atât pe bază de polimeri sintetici (PP, PMMA, elastomer termoplastic, cauciuc siliconic) cu diferite (nano)umpluturi (nanosilicaţi naturali, cu morfologie lamelară sau tubulară, nanofire de silice, fibre naturale, nanosilice, metasilicat de calciu) cât şi pe bază de biopolimeri (biopoliamidă, poliesteri alifatici, colagen şi celuloză) cu diferiţi agenţi de ranforsare (structuri 2D grafenice şi nongrafenice, nanofibre de celuloză), implementate şi validate la nivel de TRL 5-TRL 9, pentru fabricarea de: • Componente auto de ȋnaltă calitate (bară paraşoc, formă de depozitare roată de rezervă, stâlp-B) • Ambalaje alimentare • Produse de uz veterinar • Produse biomedicale • Acoperiri de protecţie
Dynamic Mechanical Analyzer DMA Q800
DMA is used to measure the mechanical properties of a wide range of materials. Many materials, including polymers, behave both like an elastic solid and a viscous fluid, thus the term viscoelastic. DMA measures the viscoelastic properties using either transient or dynamic oscillatory tests. Storage modulus (E’), the elastic component is related to the sample’s stiffness and Loss modulus (E”) the viscous component is related to the sample’s ability to dissipate mechanical energy through molecular motion. Tan δ is parameter that provides information on the relationship between the elastic and inelastic components.
Simultaneous DSC-TG Analyser coupled with Mass Spectrometer (SDT-MS) SDT Q600 / ThermoStar TM GSD 301 T
Simultaneous DSC-TGA SDT Q600 is an analysis instrument capable of performing both differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) at the same time. The SDT measures the heat flow and weight changes associated with transitions and reactions in materials over the temperature range ambient to 1500°C. The information provided differentiates endothermic and exothermic events which have no associated weight change (e.g., melting and crystallization) from those which involve a weight change (e.g., degradation). Modes of Operation: – Standard: Ramp / Isothermal – Stepwise Isothermal – Cyclic – Evolved Gas Analysis High Resolution SDT.
Thermogravimetric Analyzer TGA Q5000IR
The Thermogravimetric Analyzer measures the amount and rate of weight change in a material, either as a function of increasing temperature, or isothermally as a function of time, in a controlled atmosphere. It can be used to characterize any material that exhibits a weight change and to detect phase changes due to decomposition, oxidation, or dehydration. Modes of Operation: Standard TGA, Hi-Res TGA, Auto Stepwise TGA, Modulated TGA, Evolved Gas Analysis – EGA (TGA/MS and/or TGA/FTIR Operation).
Differential Scanning Calorimeter DSC Q2000
The Differential Scanning Calorimeter (DSC) determines the temperature and heat flow associated with material transitions as a function of time and temperature. It also provides quantitative and qualitative data on endothermic (heat absorption) and exothermic (heat evolution) processes of materials during physical transitions that are caused by phase changes, melting, oxidation, and other heat-related changes.
Atomic force microscope Multimode 8
Atomic force microscope is designed to the characterization of polymers and polymer nanocomposites surface. AFM investigations provide information on the surface topography, adhesion, morphology (crystalline phase, nanoparticles dispersion) and roughness. PFQNM can generate material property maps at nanolevel.
Nanomechanical testing instrument Hysitron TriboIndenter Premier
The TriboIndenter (TI) Premier makes nanoscale mechanical and tribological characterization simple and consistent. This dedicated system provides a variety of standard nanoscale characterization techniques with unparalleled accuracy and precision. The TI Premier comes with in situ SPM imaging capability and capacitive transducer technology, making the system applicable to the widest range of materials and devices. Motorized staging, top-down color optics, anti-vibration system, environmental enclosure, control software, and fast digital electronics decrease time to results and ease instrument use. The TI Premier offers automated testing routines for increased testing throughput and minimized operator interaction.
Equipment for the measurement of interfacial properties CAM200
CAM 200 allows the evaluation of hydrophilicity/hydrophobicity of the materials surface, surface tension and interfacial adhesion of polymer blends and composites and the effectiveness of the surface treatments of polymers or organic/inorganic (nano) fillers. For the measurement of the contact angle and interfacial/surface tension, the shape of the droplet is analyzed using the captured images.
Equipment for impact testing of polymer composites – HIT 5.5P Pendulum Impact Tester
The Pendulum Impact Tester HIT5.5P can be used for the determination of impact resistance on plastics and other materials. The impact tester can be equipped with accessories for Charpy, Izod, Dynstat, and impact tensile according to the following standards: Charpy: ISO 179-1, ASTM D6110, DIN 50115 Izod: ISO 180, ASTM D256 (notched) and D4812 (without notch) Impact tensile: ISO 8256-A and 8256-B, ASTM D1822 (spec. in head) Dynstat: DIN 53435
Equipment for physico-mechanical characterization, Universal Testing Machine Instron 3382
The Instron 3382 floor model testing system is suited for mechanical characterization of materials in tension, compression, peel and bending (3-Point Bend Flexure) up to 100 kN (22,400 lbf). It meets or exceeds ASTM E4, BS 1610, DIN 51221, ISO 7500/1, EN 10002-2 standards.
Buchi SFS Laboratory Pressure Reactors BuchiGlasUster SFS Reactor #02.5196
SFS Laboratory Pressure Reactor modular-setup: – Coverplate with 4×1⁄4″ NPT openings, – Easy interchange of different pressure reactors – Pressure vessels in Borosilicate glass 3.3, Stainless steel for different temperature / pressure ratings, – Reactor volume: 0.50 – 5.0 liter – Temperature control by thermostat with double jacket or electrical heating: – 20 °C to +250 °C – Pressure: -1 (FV) to +6 – 12 bar (glass reactors) / 40 – 100 bar (stainless steel reactors) Chemical reactions, applications: – Polymerization reactor – Chemical synthesis reactor – Catalyst testing / evaluation – Biopolymer research – Nanoparticle synthesis
Platen Press P 200 E
DATA SHEET: – Two platen press with four-column construction and cooling cassette – Nominal platen size 200 × 200 mm; – Hydraulic force 120 kN; – Max specific pressure 312 N/cm2; – Motor power 0.8 kW; – Max operating temperature 300 °C. DESCRIPTION: Laboratory press with automatic cycle, fine adjustable temperature and high force of sealing the mould to ensure the compression molding of micro and nanocomposites with thermoplastic polymer matrices. The press is also designed for the preparation of the films with the thickness of less than 200 µm necessary.
Leistritz LSM 30.34
Modular intermeshing co-rotating twin screw extruder for melt mixing and masterbatch obtaining at laboratory scale. It is equipped with: – eight heating zones – seven air-cooled zones – a degassing zone – horizontal dosing feed – forced feeder – can measure the pressure and temperature of the molten material – K-Tron feeder Accessories: die head for strand die, water bath and granulator.
Brabender LabStation –System for rheological characterization and melt processing of polymers and composites
Brabender LabStation is a complex system for melt rheology characterization and preparation of composite by melt compounding and extrusion, rolling and film blowing. It has several interchangeable devices such as mixing chambers, double screw extruder, film blowing system and accessories (two roll mill, granulator, conveyor belt, blown film take off unit).
Injection Molding Machine ENGEL VC 60/28
Unitate de injecţie 60 Cursă dozare 100 mm Diametru melcului Ø20 Volum de injecţie, max. 31 cm³ Turaţia melcului 450 rpm Raportul L / D 24 Capacitate de plastifiere 4 g/s Presiune specifică de injecţie, max. 2200 bar Cursă a duzei 230 mm Număr al zonelor de încălzire, incl. pentru duză 4 buc. Forţă de închidere 280 kN Cursă de deschidere 400 mm Înălţime minimă a matriţei 150 mm Distanţă între platane, max. 550 mm Greutatea max a matriţei 600 kg Număr al circuitelor de răcire pentru matriţă 4 Cursă a aruncătorului 100 mm Forţă de aruncare 40 kN
Biopolymer structures obtained by plasma treatment for wounds healing – BIOPLASM
The scope of the project is to obtain effective dressings for the treatment of infected wounds by developing antibacterial nanocellulose nanocarriers deposited on an aliphatic polyester substrate.
Design of new nanocellulose-based gas-carrier systems
The scope of the CELGAS project is to develop innovative oxygen-carrying systems capable of supplying oxygen in a controlled manner to injured tissue/implants or intravenously.
Bio-based nanocomposites from epoxy-celullose with balanced thermo-mechanical properties – EPOCEL
The proposed project aims to develop new nanocomposites, based on renewable and inexpensive biological sources, with thermo-mechanical balanced properties for applications in electronics.
New materials based on polylactic acid with controlled flexibility – FLEX4PLA
FLEX4PLA project aims the research and design of new biomaterials in which both polymers and additives are being derived from renewable resources.
Zina Vuluga Z., Sanporean C.G., Panaitescu D.M., Teodorescu G.M., Corobea M.C., Nicolae C.A., Gabor A.R., Raditoiu V.
The Effect of SEBS/Halloysite Masterbatch Obtained in Different Extrusion Conditions on the Properties of Hybrid Polypropylene/Glass Fiber Composites for Auto Parts
Polymers, Volume 13, October 2021
Chiulan I., Panaitescu D.M., Radu E.R., Vizireanu S., Sătulu V., Biţă B., Gabor R.A., Nicolae C.A., Raduly M., Rădiţoiu V.
Influence of TEMPO oxidation on the properties of ethylene glycol methyl ether acrylate grafted cellulose sponges
Carbohydrate Polymers, Volume 272, November 2021
Panaitescu D.M., Nicolae C.A., Melinte V., Scutaru A.L., Gabor A.R., Popa M.S., Oprea M., Buruiana T
Influence of microfibrillated cellulose and soft biocomponent on the morphology and thermal properties of thermoplastic polyurethanes
Journal of Applied Polymer Science, Volume 138, August 2021
Ianchis, R., Munteanu, T., Ninciuleanu, C. M., Gifu, I. C., Alexandrescu, E., Somoghi, R., Gabor, A. R., Preda, S., Nistor, C. L., Nitu, S., Petcu, C.
The Effect of Clay Type on the Physicochemical Properties of New Hydrogel Clay Nanocomposites
În: Current Topics in the Utilization of Clay in Industrial and Medical Applications, Mansoor Zoveidavianpoor, IntechOpen
Corobea, M.C., Vuluga, Z., Florea, D., Miculescu, F., Voicu, S.I.
Composites and Nanocomposites Based on Polylactic Acid
Capitolul 13, pp. 327-360 în: “Handbook of Composites from Renewable Materials, Nanocomposites : Advanced Applications”, Eds: Thakur V.K., Thakur M.K., Kessler M.R.,Wiley and Scrivener Publishing, 2017
Donescu, D., Corobea, M.C.*, Spataru, C.I., Ghiurea, M.
Polymer carbon nanotubes composites obtained via radical polymerization in water-dispersed media
Capitol 11, pp. 281-305 în: Woodhead Publishing Series in Composites Science and Engineering “Hybrid Polymer Composite Materials Processing” 2017 Elsevier Ltd.