Adiabatic scanning calorimetry investigation of the melting and order-disorder phase transitions in the linear alkanes heptadecane and nonadecane and some of their binary mixtures

2021 ◽  
pp. 106596
Author(s):  
Jan Thoen ◽  
George Cordoyiannis ◽  
Christ Glorieux
Keyword(s):  
Phase Transitions ◽  
Binary Mixtures ◽  
Scanning Calorimetry ◽  
Adiabatic Scanning Calorimetry ◽  
Linear Alkanes

scholarly journals Phase Transitions of Binary Lipid Mixtures: A Combined Study by Adiabatic Scanning Calorimetry and Quartz Crystal Microbalance with Dissipation Monitoring

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
P. Losada-Pérez ◽  
N. Mertens ◽  
B. de Medio-Vasconcelos ◽  
E. Slenders ◽  
J. Leys ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Phase Diagrams ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Phase Behaviour ◽  
Scanning Calorimetry ◽  
Departure Point ◽  
Peltier Element ◽  
Adiabatic Scanning Calorimetry ◽  
Lipid Mixtures

The phase transitions of binary lipid mixtures are studied by a combination of Peltier-element-based adiabatic scanning calorimetry (pASC) and quartz crystal microbalance with dissipation monitoring (QCM-D). pASC, a novel type of calorimeter, provides valuable and unambiguous information on the heat capacity and the enthalpy, whereas QCM-D is proposed as a genuine way of determining phase diagrams by analysing the temperature dependence of the viscosity. Two binary mixtures of phospholipids with the same polar head and differing in the alkyl chain length, DMPC + DPPC and DMPC + DSPC, are discussed. Both techniques give consistent phase diagrams, which compare well with literature results, showing their capability to map the phase behaviour of pure lipids as well as lipid mixtures. This work can be considered as a departure point for further investigations on more complex lipid mixtures displaying relevant phases such as the liquid-ordered phase and solid-lipid interfaces with biologically functional importance.

scholarly journals New Insight into Phase Transitions of Porous Glass-Based Ferroelectric Nanocomposites

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3698 ◽  
Author(s):  
Ewa Rysiakiewicz-Pasek ◽  
Tatiana Antropova ◽  
Irina Polyakova ◽  
Olga Pshenko ◽  
Agnieszka Ciżman
Keyword(s):  
Phase Transitions ◽  
Binary Mixtures ◽  
Pore Space ◽  
Structural Phase ◽  
Porous Silica ◽  
Mean Value ◽  
Space Structure ◽  
Scanning Calorimetry ◽  
Electron Microscopic ◽  
The Impact

The results of XRD, FTIR and differential scanning calorimetry (DSC) studies of empty porous silica matrices filled with binary mixtures of K1–xAgxNO3 (x = 0.05, 0.10) are reported in comparison with those obtained for bulk salts in the temperature range of structural phase transitions. Scanning electron microscopic data of the studied empty macroporous and microporous glasses confirmed differences in the pore morphology associated with the presence of silica gel. Accordingly, XRD and FTIR samples contain crystalline phase of KNO3 and AgNO3. The results of calorimetric investigation of porous glasses filled with binary mixtures of K1–xAgxNO3 (x = 0.05, 0.10) are presented. The results show that in the K1–xAgxNO3 nanocomposites, anomalies associated with phase transitions were detected. An influence of the mean value of pores sizes on the ferroelectric phase transition temperatures of K1–xAgxNO3 nanocrystals embedded into the porous matrices was determined. The impact of pore space structure on the phase transitions of ferroics nanocomposites was discussed.

scholarly journals FTIR and DSC Studies of Binary Mixtures of Long-Chain Aliphatic Compounds: Lauric Acid – Cetyl-trimethylammonium Bromide

2018 ◽  
Vol 63 (5) ◽  
pp. 413
Author(s):  
T. Gavrilko ◽  
I. Gnatyuk ◽  
V. Styopkin ◽  
N. Shcherban ◽  
J. Baran ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Binary Mixture ◽  
Binary Mixtures ◽  
Lauric Acid ◽  
Condensed State ◽  
Ammonium Bromide ◽  
Scanning Calorimetry ◽  
Supramolecular Compounds ◽  
Dsc Studies ◽  
Long Chain

Structural and thermal properties of a solid-state binary mixture of long-chain cationic and anionic surfactants (so-called catanionic complexes) composed of cetyltrimethyl-ammonium bromide, [H3C–(CH2)15–N+(CH3)3]Br−(CTAB), and saturated fatty acid (FA), CH3(CH2)12COOH (lauric acid, kC12), are studied. To clarify the effect of intermolecular interactions on the crystalline structure and phase transitions in this class of supramolecular compounds, the 1 : 1 kC12-CTAB binary mixture is investigated by means of X-ray diffraction, differential scanning calorimetry (DSC), and temperature-variable Fourier transform infrared spectroscopy (FTIR). Based on the comparison of the obtained results with those of other CTAB-FA binary mixtures with different alkyl chain length mismatches, the possible molecular packing in the crystal phase of CTAB-FA complexes and the mechanism of successive phase transitions in the condensed state are proposed.

Phase Transitions in the Starch−Water System Studied by Adiabatic Scanning Calorimetry

2002 ◽  
Vol 50 (6) ◽  
pp. 1335-1344 ◽  
Author(s):  
Alfredo Cruz-Orea ◽  
Guido Pitsi ◽  
Peter Jamée ◽  
Jan Thoen
Keyword(s):  
Phase Transitions ◽  
Water System ◽  
Scanning Calorimetry ◽  
Adiabatic Scanning Calorimetry
Sign in / Sign up

Export Citation Format

Share Document