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Laboratory 5. Natural Polymers, Bioactive and Biocompatible Materials
Head of laboratory: Dr. Gheorghe FUNDUEANU
Description Research Groups Publications Projects Infrastructure
Equipment: Zetasizer Nano ZS (Malvern)

Zetasizer Nano ZS (Malvern): for the measurements of the particles size in the range of 1-8000 nm (by dynamic light scattering at an angle of 90o, using a He-Ne laser at λ = 633 nm) and zeta potential of the nanoparticles. The device allows the temperature control in the range of 3-80 oC.

Dr. Irina Popescu /
Equipment: Liofilizator Martin Christ, ALPHA 1-2LD

Liofilizator Martin Christ, ALPHA 1-2LD allows drying of the samples from aqueous solution by sublimation of water at low temperature and pressure.

Dr. Irina Pelin /
Equipment: Texture Pro CT3, Brookfield

Texture Pro CT3, Brookfield, universal testing machine that offers both compression and tensile testing. 

  • the load cell of 4.5 kg
  • speed setting range: 0.01 mm/s - 10 mm/s, with 0.1% accuracy

Dr. Marieta Fundueanu Constantin /
Equipment: HPLC modular system (Shimadzu)

   HPLC modular system (Shimadzu) equipped with a quaternary pump working in isocratic regimen or with low pressure gradient, at 0.1-10 ml/min elution rate, RID and UV-Vis detectors (with simultaneous recording at two different wavelength), oven for column temperature control (30-85oC), HPLC reverse phase column (silica particles covered with C18) used for qualitative detection and quantitative analysis of low molecular weight compounds (<1.000 Da), mixed bed GPC columns for molecular weight measurements of hydrophilic neutral and ionic polymers (5.000 - 500.000 Da).

Dr. Marieta Nichifor /
Equipment: PHYSICA MCR302 Rheometer (Anton Paar, Austria)

PHYSICA MCR302 Rheometer, a modular system, works in controlled shear stress (CSS) mode or controlled shear rate (CSR) mode, being equipped with:
● Toolmaster TM (for automatic detection and configuration of the measuring system) TruGap™ (permanent control of the real measuring gap system);
● TruRate™ (controlling the shear rate, having the ability to adapt to any type of sample);
● TruStrain™ (controlling the geometry position in time and allowing to reach perfect sinusoidal deformation in time);
● Peltier (for rigorous temperature control);
● Possibility to control the normal force during the experiment

Minimum torque: in rotation – 10 nNm; in oscillation – 2 nNm;
Temperature range: min.  -20oC (-30 with cryostat);  max: 200oC;
Working geometries:  cone-plane (cone - 1o, diameter - 50 mm); 
                                 pane-plane (diameter - 50 mm and 25 mm);
An antievaporation device is used to prevent solvent evaporation during the measurement.

Dr. Maria BERCEA / Int. 249
Equipment: BOHLIN CVO50 Rheometer (Malvern, UK)

BOHLIN CVO50 Rheometer, equipped with Peltier system, works in controlled shear stress (CSS) mode.
Minimum torque: 0.5 μNm
Temperature range: min.  -20oC (-30 with cryostat);  max: 180oC
Working geometries: cone-plane (cone - 2o, diameter - 60 mm; cone - 4o, diameter - 40 mm), 
                                pane-plane (diameter - 60 mm)
An antievaporation device is used to prevent solvent evaporation during the measurement.

Dr. Maria BERCEA / Int. 249
Equipment: HACH TL2360 turbidimeter (HACH Company, USA)

HACH TL2360 turbidimeter: is used for turbidity measurement caused by the suspended materials in a fluid (drinking, surface and wastewater).

General Specifications: 
• Measurement method: Nephelometric
• Operating temperature: 0 to 40 °C (32 to 104 °F)
• Measurement units: FNU, NTU, EBC, Abs (absorbance), %T (% transmittance) and mg/L(degre)
• Range: FNU: 0–1000 FNU; 0–10,000 auto decimal NTU; 0–2450 auto decimal EBC;
              Absorbance (auto range): 0–2.00 
              Transmittance (%): 1.0–100 Degree: 0–100 mg/L

• Resolution: Turbidity: 0.001 FNU/NTU/EBC
                     Absorbance: 0.001 Abs
                     Transmittance: 0.1% T

Sample cells: Round cells 95 x 25 mm (3.74 x 1 in) borosilicate glass with rubber-linedscrew caps.

dr. habil. Luminita Ghimici / e-mail:
Equipment: HACH 2100 AN Turbidimeter (HACH, USA)

   The Hach Model 2100AN Laboratory Turbidimeter is designed for turbidity and attenuation measurement in accordance with International Turbidity Measurement Standards ISO 7027, DIN 38404 and NF EN 27027. The turbidimeter also provides direct measurements in units of NTU (Nephelometric Turbidity Unit, 0-10000), % Transmittance and Absorbance. 
   The turbidimeter is equipped with a 90-degree detector, a forward scatter light detector, back scatter detector and a transmitted light detector. By selecting the complete set of detectors (Ratio mode), the turbidimeter measures the turbidity up to 10000 NTU. By setting the Signal Averaging mode, the NTU values given by the device are an average of 10 measurements.
  The device provides direct measurements in units of NTU with an accuracy of ± 2% for 0-1000 NTU, ± 5% for 1000 - 4000 NTU and ± 10% for 4000 - 10000 NTU.

Dr.Simona MORARIU / Int. 246
Equipment: OSMOMAT 090 Membrane Osmometer (Gonotec GmbH, Germany)

OSMOMAT 090 Membrane Osmometer:
 • Allows the measurement of osmotic pressure for water-soluble macromolecules and polymers dissolved in organic solvents. The concentration range: 0.2 g/dL up to 20 g/dL, depending on the molecular weight, within the range of 104 g/mol to 2×106 g/mol.
 • Semipermeable membranes from cellulose triacetate are available (Cut-off between 5,000, 10,000 and 30,000 g/mol)
  From the osmotic pressure at equilibrium determined for different polymer concentrations, the average number molecular weight (Mn), as well as the second (A2) and third (A3) virial coefficients can be determined at a given temperature.

Dr. Maria BERCEA / Int. 250
Equipment: STA 409 PC Luxx Simultaneous thermal analyzer

   The STA 409 PC Luxx Simultaneous thermal analyzer conected to a FTIR and a mass spectrometer gas analysis systems allows one-step analysis on the same sample of mass changes, decomposition behavior, thermal stability, oxidation behavior, transition enthalpies, phase transition temperatures, glass transition temperature, crystallization behavior, phase diagrams and the influence of additives.
   The equipment is connected to FTIR and MS ensuring the evaluation and analysis of the gases resulting during the thermal decomposition of the investigated structures. The equipment performs measurements in a vacuum, oxidizing atmosphere or inert gas, from -110ºC to 700ºC.

Equipment: ZetaSizer Nano ZS (Malvern UK)

ZetaSizer Nano ZS – is a molecular size analyser for the enhanced detection of aggregates and measurement of small or dilute samples, using dynamic light scattering with ‘NIBS’ optics. The equipment allows the evaluation of particle and molecule size, translational diffusion, electrophoretic mobility, zeta potential of particles at high and low concentrations, and molecular weight. The zeta potential analyser uses electrophoretic light scattering for particles, molecules and surfaces, and the molecular weight analyser uses static light scattering. Measuring range for dimensions - 0.3 nm at 10 µm.

Equipment: MasterSizer 2000 (Malvern, UK)

   MasterSizer 2000 – is a laser diffraction testing instrument used to evaluate particle size distribution in a range between 0.02 µm and 2000 µm, with a precision of ± 1%. It is a flexible and modular, but fully integrated, particle sizing system with assured measurement performance from submicron to millimetre, wet or dry, from milligram quantities to the measurement of bulk chemicals and minerals.
   The dispersion medium is water, and depending on the samples and needs, surfactants - usually non-ionic - or additives may or may not be used: three-sodium phosphate, sodium oxalate, calcium chloride.

Equipment: SisuChema NIR-CI System

   SisuChema NIR-CI System – combines NIR spectroscopy with high resolution imaging. It provides detailed information on the chemical components, their quantities and distributions within the sample. It is invaluable information for the characterization and quality assurance of advanced materials, where the functionality of the material is dependent on its chemical and physical structure.
   The analyser can be applied to a broad number of applications: non-destructive determinations on pharmaceutical tablets, distribution and concentration of the components within a sample; the study of the uniformity of pharmaceutical blends; particles size and distribution of the chemical components in heterogeneous mixtures; identification of polymorphic forms.

Equipment: Electro-kinetic Analyser for Solid Surface Analysis: SurPASS

   SurPASS is a high-end electro-kinetic analyser featuring fully automated zeta potential analysis of macroscopic solids in real-life conditions.
   The zeta potential is related to the surface charge at a solid/liquid interface and is a key parameter for understanding surface properties and developing new specialized materials.

Equipment: Johnson Matthey Magnetic Susceptibility Balance

   Johnson Matthey Magnetic Susceptibility Balance determines the magnetic properties of paramagnetic and diamagnetic solids and liquids. The method is based on the principle of the stationary sample and a moving magnet.
   The volumetric susceptibility in c.g.s units can be measured in the range: 0.001 x 10-7 - 1.99 x 10-4.

Equipment: Microscope Leica DM2500 M

   Microscope Leica DM2500 M - for material analysis, with specially optimized digital cameras (Digital FireWire Color camera for analysis and documentation, DFC 290) and image archiving software is a flexible microscope system.
   With the DM2500 M stand, it can be chosen between two incident light axes:
● the 4x incident light axis is optimal for bright field (BF) and dark field (DF) applications or differential interference contrast (DIC), qualitative polarization (POL) or fluorescence (Fluo) applications;
● the 5x incident light axis has been specially designed for BF applications and is particularly well suited for use in the pharmaceutical industry, for example, analyzing cell growth on metal surfaces.

Dr. Diana Ciolacu /
Equipment: Titration Unit TitroLine easy

   Titration Unit TitroLine easy - provides the perfect combination of a syringe burette, a pH/mV meter and integrated intelligence.
   Measuring range pH: 0.00 ÷ 14.00; Measuring range mV: -1400 ÷ +1400; Measuring input temperature sensor Pt 1000; Measuring range: - 30 ÷ +115 °C.

Equipment: Ultima1 Freezer Arctiko ULUF 60

   Ultima1 Freezer Arctiko ULUF 60 - is a compact ultra-low temperature freezer, with 54 liters capacity, temperature range of -40 ÷ -20 °C.
   The microprocessor controller presents digital display and USB read out.

Dr. Diana Ciolacu /
Equipment: Impact resistance testing device (CEAST Italia)

Impact resistance testing device (CEAST Italia) allows the impact test to be carried out using the IZOD method, respectively CHARPY. The impact test using the Charpy method is performed according to ISO 179-1: 2010.

Dr. Iuliana Spiridon /
Equipment: Tensile strength tester

Tensile strength tester (Tester 53482 series, measuring range 1-5 kN, accuracy class 1) allows the evaluation of tensile strength. The control, recording and analysis of the test system data is carried out through an INSTRON (Bluehill Lite) software program specially designed for this type of testingth tester.

Dr. Iuliana Spiridon /
Equipment: The climate chamber Angelantoni Industrie (Italy)

The climate chamber Angelantoni Industrie (Italy), model CH 250E allows the study of the aging phenomena of polymeric materials under the influence of humidity, temperature and UV radiation

Dr. Iuliana Spiridon /
Equipment: Brabender station for polymer processing

Brabender Lab station for polymer processing is the basic unit that drives different processing devices (mixer, extruder), the parts being connected in a network with permanent exchange of information between the individual components of the system, allowing the recording, control and preset of the nominal values of the system parameters.

Dr. Iuliana Spiridon /
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