Thermal Analysis in Energy

Pielichowska, Kinga; Pielichowski, Krzysztof

doi:10.1002/9783527828692.ch16

Cited by 2 publications

(2 citation statements)

References 73 publications

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“…Finally, at a sufficiently high temperature, they decompose. The degradation process begins with breaking the weakest bonds, followed by an intensive release of degradation products of different volatility and chemical composition [ 33 , 34 ].…”

Section: Discussionmentioning

confidence: 99%

Photochemical and Thermal Stability of Bionanocellulose/Poly(Vinyl Alcohol) Blends

2022

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This research focuses on novel ecological materials for biomedical and cosmetic applications. The cellulose of bacterial origin is well suited for such purposes, but its functional properties must be modified. In this work, the blends of bionanocellulose and poly(vinyl alcohol), BNC/PVA, were prepared based on in situ and ex situ methodology combined with impregnation and sterilization, using different concentrations of PVA. The main purpose of this work was to check the influence of UV radiation and high temperature, which can be sterilizing factors, on the properties of these mixtures. It was found that the crystallinity degree increases in UV-irradiated samples due to the photodegradation of the amorphous phase. This changes the mechanical properties: the breaking stress and Young’s modulus decreased, while the strain at break increased in most UV-irradiated samples. The surface morphology, which we observed by using AFM, did not change significantly after exposure, but the roughness and surface free energy changed irregularly in samples obtained by different methods. However, the effects induced by UV-irradiation were not so crucial as to deteriorate the materials’ properties designed for medical applications. Thermogravimetric analysis exhibited good thermal stability for all samples up to at least 200 °C, which allows for the prediction of these systems also in industrial sectors.

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Section: Discussionmentioning

confidence: 99%

Photochemical and Thermal Stability of Bionanocellulose/Poly(Vinyl Alcohol) Blends

2022

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“…[ 7 ] Well‐known examples of such PCMs include paraffins, fatty acids, polymers and salt‐hydrates. [ 8–10 ] These PCMs are used in drug‐delivery, smart textiles, energy storage and temperature control device applications; [ 11–13 ] examples of drug‐delivery systems based on liquid‐vapor transition PCMs are also known. [ 14 ] PCMs for the various applications are fabricated as colloidal particles through emulsion or microfluidic routes; microencapsulation with suitable coating materials is useful for the solid‐liquid systems, and achieved through techniques like spray‐coating and electrospinning.…”

Section: Introductionmentioning

confidence: 99%

Direct Laser Write‐Read‐Erase in a Functional Molecular Phase Change Material–Polymer Nanocomposite Thin Film

Maurya,

Chaudhary,

Srujana

et al. 2024

Advanced Optical Materials

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Phase change materials based on organics and salt hydrates with large latent heats of transition are used extensively in energy storage systems; those based on low melting alloys exhibiting electrical/optical characteristics switching with amorphous‐crystalline (A ↔ C) transformations are of major interest in information storage devices. The direct laser write‐read‐erase is reported using a functional molecular phase change material. Facile and reversible A ↔ C transformations with concomitant switching of fluorescence emission color and intensity are demonstrated in polymer thin films doped with a diaminodicyanoquinodimethane based fluorophore using thermal operations as well as laser irradiation. In the mask‐less direct write‐erase process developed, the laser power and irradiation time are tuned to write and erase; the reading is carried out by exploiting the characteristic fluorescence signature. This work opens up a novel avenue to develop sensors and encryption systems exploiting organic molecule based optical materials encapsulated in polymer thin films.

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Thermal Analysis in Energy

Cited by 2 publications

References 73 publications

Photochemical and Thermal Stability of Bionanocellulose/Poly(Vinyl Alcohol) Blends

Photochemical and Thermal Stability of Bionanocellulose/Poly(Vinyl Alcohol) Blends

Direct Laser Write‐Read‐Erase in a Functional Molecular Phase Change Material–Polymer Nanocomposite Thin Film

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