A review on differential scanning calorimetry technique and its importance in the field of energetic materials

Abd‐Elghany, Mohamed; Klapötke, Thomas M.

doi:10.1515/psr-2017-0103

Cited by 21 publications

(15 citation statements)

References 32 publications

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“…In this technique, the difference in the amount of heat required to increase the temperature of the specimen and reference sample is measured as a function of temperature. [ 53 ] According to Devonshire's theory of BT, the free energy of the crystal changes discontinuously at phase transition temperatures. [ 50 ] The positive change in free energy represents that the thermodynamic process needs an input of energy to take place.…”

Section: Resultsmentioning

confidence: 99%

Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

et al. 2020

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The lead-free 0.5((Ba 0.7 Ca 0.3)TiO 3)-0.5(Ba(Zr 0.2 Ti 0.8))O 3 (BCZT) piezoceramics were synthesized using sol-gel method. The Rietveld analysis of X-ray diffraction (XRD) data and differential scanning calorimetry (DSC) studies of as-synthesized BCZT powder suggests the coexistence of ferroelectric orthorhombic (O) and tetragonal (T) phases at room temperature (RT). The value of curie temperature (T T-C) as depicted from DSC and dielectric studies was found to be ≈ 110 C. The BCZT ceramic particles were dispersed in the polyvinylidene fluoride (PVDF) matrix, an electroactive polymer with great ferro/piezoelectric response in its distinct β and γ phases, to form ferroelectric ceramic-polymer composites for their applications in flexible energy storage capacitors. The present work reports the Fourier-transform infrared spectroscopy (FTIR), XRD, dielectric, ferroelectric, and energy density properties of PVDF/BCZT composite films having different wt% of BCZT content fabricated by the solution-cast technique. The FTIR and XRD studies depict the γ-PVDF and pure BCZT phases in composite films. The dielectric studies estimated the relative permittivity (ε r) of a composite film with 50 wt% of BCZT content to be ≈ 31 (at 120 Hz) which was about three times as compared with that of pure PVDF. The dielectric loss (tan δ) was maximum ≈ 0.15 (at 120 Hz) for 50 wt % BCZT composition. The ferroelectric studies and energy storage calculations showed that the value of remnant polarization (P r), coercive field (E c) and energy storage density (W) attain the maximum value of 0.63 μC/cm 2 , 35.22 kV/cm, and 70.46 mJ/cm 3 , respectively for the film sample having 40 wt% BCZT content. The maximum energy storage efficiency, η (%) is calculated to be ≈ 60 for 50 wt% BCZT composition. The results indicated that the incorporation of BCZT particles

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Section: Resultsmentioning

confidence: 99%

Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

et al. 2020

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“…Differential scanning calorimetry could be used to determine the phase state of a compound. It can also be used to observe the fusion and crystallization characteristics of polymers [ 51 ]. After increasing the temperature, the sample was melted at the melting temperature (Tm) which resulted in an endothermic peak in the DSC curve [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

Surface Modification of Curcumin Microemulsions by Coupling of KLVFF Peptide: A Prototype for Targeted Bifunctional Microemulsions

et al. 2022

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Curcumin is one of the most promising natural therapeutics for use against Alzheimer’s disease. The major limitations of curcumin are its low oral bioavailability and difficulty in permeating the blood–brain barrier. Therefore, designing a delivery system of curcumin to overcome its limitations must be employed. KLVFF, a peptide known as an amyloid blocker, was used in this study as a targeting moiety to develop a targeted drug delivery system. A prototype of transnasal KLVFF conjugated microemulsions containing curcumin (KLVFF-Cur-ME) for the nose-to-brain delivery was fabricated. The KLVFF-Cur-ME was developed by a titration method. A conjugation of KLVFF was performed through a carbodiimide reaction, and the conjugation efficiency was confirmed by FTIR and DSC technique. KLVFD-Cur-ME was characterized for the drug content, globule size, zeta potential, and pH. A transparent and homogeneous KLVFF-Cur-ME is achieved with a drug content of 80.25% and a globule size of 76.1 ± 2.5 nm. The pH of KLVFF-Cur-ME is 5.33 ± 0.02, indicating non-irritation to nasal tissues. KLVFD-Cur-ME does not show nasal ciliotoxicity. An ex vivo diffusion study revealed that KLVFF-Cur-ME partitions the porcine nasal mucosa through diffusion, following the Higuchi model. This investigation demonstrates the successful synthesis of a bifunctional KLVFF-Cur-ME as a novel prototype to deliver anti-Aβ aggregation via an intranasal administration.

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“…Additionally, TGA/DSC equipment can be coupled with other instruments that identify released gasses and their chemical composition. As result, emissions and evolved pollution during the process can be quantified and managed [25][26][27].…”

Section: Methods Of Thermal Processes Analysismentioning

confidence: 99%

Carbonized Solid Fuel Production from Polylactic Acid and Paper Waste Due to Torrefaction

2021

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The quantity of biodegradable plastics is increasing steadily and taking a larger share in the residual waste stream. As the calorific value of biodegradable plastic is almost two-fold lower than that of conventional ones, its increasing quantity decreases the overall calorific value of municipal solid waste and refuse-derived fuel which is used as feedstock for cement and incineration plants. For that reason, in this work, the torrefaction of biodegradable waste, polylactic acid (PLA), and paper was performed for carbonized solid fuel (CSF) production. In this work, we determined the process yields, fuel properties, process kinetics, theoretical energy, and mass balance. We show that the calorific value of PLA cannot be improved by torrefaction, and that the process cannot be self-sufficient, while the calorific value of paper can be improved up to 10% by the same process. Moreover, the thermogravimetric analysis revealed that PLA decomposes in one stage at ~290–400 °C with a maximum peak at 367 °C, following a 0.42 reaction order with the activation energy of 160.05 kJ·(mol·K)−1.

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A review on differential scanning calorimetry technique and its importance in the field of energetic materials

Cited by 21 publications

References 32 publications

Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

Surface Modification of Curcumin Microemulsions by Coupling of KLVFF Peptide: A Prototype for Targeted Bifunctional Microemulsions

Carbonized Solid Fuel Production from Polylactic Acid and Paper Waste Due to Torrefaction

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