The importance of ionic conduction in microwave heated polyesterifications

Hargreaves, George; Buttress, Adam; Dimitrakis, Georgios; Dodds, Chris; Martin‐Tanchereau, Pierre; Unthank, Matthew G.; Irvine, Derek J.

doi:10.1039/c9re00313d

Cited by 3 publications

(1 citation statement)

References 36 publications

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“…MW uses electromagnetic radiation with frequencies ranging from 300 MHz to 300 GHz, resulting in dielectric heating in due to energy generated by dipolar rotation and ionic conduction [48]. Electromagnetic waves interact within different macromolecules at different levels depending on their dielectric properties, thus determining the amount of energy that is reflected, transmitted, and adsorbed.…”

Section: Mwmentioning

confidence: 99%

Emergent Proteins-Based Structures—Prospects towards Sustainable Nutrition and Functionality

Pereira

Rodrigues

2021

Gels

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The increased pressure over soils imposed by the need for agricultural expansion and food production requires development of sustainable and smart strategies for the efficient use of resources and food nutrients. In accordance with worldwide transformative polices, it is crucial to design sustainable systems for food production aimed at reducing environmental impact, contributing to biodiversity preservation, and leveraging a bioeconomy that supports circular byproduct management. Research on the use of emergent protein sources to develop value-added foods and biomaterials is in its infancy. This review intends to summarize recent research dealing with technological functionality of underused protein fractions, recovered from microbial biomass and food waste sources, addressing their potential applications but also bottlenecks. Protein-based materials from dairy byproducts and microalgae biomass gather promising prospects of use related to their techno-functional properties. However, a balance between yield and functionality is needed to turn this approach profitable on an industrial scale basis. In this context, downstream processing should be strategically used and properly integrated. Food solutions based on microbial proteins will expand in forthcoming years, bringing the opportunity to finetune development of novel protein-based biomaterials.

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Section: Mwmentioning

confidence: 99%

Emergent Proteins-Based Structures—Prospects towards Sustainable Nutrition and Functionality

Pereira

Rodrigues

2021

Gels

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Rapid microwave controlled polyesterification of aconitic acid and ethylene glycol

Orozco

Andrade

Delgado

et al. 2020

Polymer International

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Microwave polyesterification of trans‐aconitic acid and ethylene glycol was carried out by controlling two parameters: temperature and exposure to irradiation. A series of crosslinked materials was obtained showing diverse behavior in terms of solubility, glass transition temperature and decomposition temperature. In contrast to heating by convection that could last hours, polyesters obtained by microwave irradiation were obtained after a maximum of 30 min of reaction. More importantly, the polyesterifications were carried out in bulk, with no solvent involved and without the use of any catalyst. © 2020 Society of Chemical Industry

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Microwave-assisted heating behavior of amorphous SiC fibers derived from polycarbosilane

Joo¹,

Cho²

2021

Mater. Res. Express

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In this study, polymer-derived SiC fibers fabricated using low-melting point PCS (polycarbosilane) were prepared in a mat shape for application as a microwave-assisted heating element. In addition, polymer-derived SiC blocks of various shapes were prepared under the same conditions to verify the heating behavior under the microwave. As a result, the polymer-derived SiC generated more than 1500 °C of heat in tens of seconds under the microwave. The polymer-derived SiC also exhibited different microwave-assisted heating behavior and maximum heating temperature depending on its shape. This microwave heating behavior meant that polymer-derived SiC was more dependent on the conduction loss mechanism than the dipolar loss mechanism. Therefore, as the pyrolysis temperature increased, the pi-electrons needed for the conduction loss were observed by Raman analysis and showed a tendency similar to the heat-generating behavior as the pyrolysis temperature increased.

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The importance of ionic conduction in microwave heated polyesterifications

Abstract: Significant increases in the reaction rate and final conversion of a model polyesterification are reported by the use of microwave heating.

Cited by 3 publications

References 36 publications

Emergent Proteins-Based Structures—Prospects towards Sustainable Nutrition and Functionality

Emergent Proteins-Based Structures—Prospects towards Sustainable Nutrition and Functionality

Rapid microwave controlled polyesterification of aconitic acid and ethylene glycol

Microwave-assisted heating behavior of amorphous SiC fibers derived from polycarbosilane

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