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book (26)

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2022 (27)

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Dissertation
Des insectes mangeurs de plastiques à l'étude de la biodégradation des polymères par les micro-organismes de leurs tubes digestifs
Authors: --- --- --- --- --- et al.
Year: 2022 Publisher: Liège Université de Liège (ULiège)

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Abstract

Dans le contexte mondial actuel, la demande en matières premières ne cesse de croître, et des millions de tonnes de plastique sont produites chaque année. Les systèmes de dégradation étant non performants, ces composés s’accumulent dans l’environnement jusqu’à constituer de réels dangers pour les organismes vivants et les écosystèmes. Des voies alternatives sont alors envisagées, comme la bio-dégradation, impliquant l’utilisation de microorganismes. Il a par conséquent été mis en évidence que certaines espèces d’insectes, telles que Tenebrio molitor et Galleria mellonella, disposent de capacités leur permettant de dépolymériser le plastique.&#13;Le présent travail s’inscrit dans ce contexte d’élimination des déchets plastiques au moyen de techniques de gestion alternatives - plus spécifiquement celles impliquant l’exploitation du microbiote intestinal de G. mellonella et de T. molitor. Une fois les populations de chaque espèce initiées, les conditions d’élevage ont été standardisées. Par la suite, un dispositif expérimental a été mis au point, visant à développer une diète standardisée à base de plastique. Les tests de croissance ont permis de sélectionner pour T. molitor une diète à base de 50% de farine et de son, avec 50% de polyuréthane solide. Des pistes d’amélioration du dispositif concernant G. mellonella ont été avancées, au vu du manque d’efficacité du système actuel et de l’absence de résultats satisfaisants.&#13;En outre, l’étude du microbiome intestinal de ces insectes a été entamée au moyen d’une caractérisation morphologique des isolats bactériens selon le traitement administré. De premières hypothèses ont alors pu être avancées sur les colonies associées ou non à la dépolymérisation de plastique. Elles seront confirmées par le séquençage de l’ADN et des protéines du tube digestif des larves, ici amorcé.&#13;Ce travail permet donc une meilleure compréhension des relations entre taux de plastique administré et croissance des individus, tout en fournissant une première approche du microbiote intestinal d’insectes ingérant le plastique. Les conclusions qui en découlent constituent une base au projet PLASTINSECT, visant à étudier les processus biochimiques impliqués dans la décomposition de polymères par T. molitor et G. mellonella.


Book
Smart Composites and Processing
Author:
ISBN: 3036560513 3036560521 Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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This Special Issue covers manufacturing of a smart polymer composites via choice of ingredients, such as polymer, filler, and additives, as well as their unique composition. It also covers the smart processing of polymer composites, which is influenced by the choice of mixers, processing condition, processing technique, etc.


Book
Phase Change Materials: Design and Applications
Author:
Year: 2022 Publisher: Basel MDPI Books

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Abstract

There is increasingly intensive research for energy storage technologies development due to the enhanced energy needs of the contemporary societies. Increased global energy consumption results in the reduction in the availability of traditional energy resources, such as coal, oil and natural gas. Therefore, there is an urgent need for new systems development based on the conversion and storage of sustainable and clean energy. Phase change materials (PCMs) are one of the key components for the development of advanced sustainable solutions in renewable energy and engineering systems. In order to update the field of renewable energy and engineering systems with the use of PCMs, a Special Issue entitled “Phase Change Materials: Design and Applications” is introduced. This book gathers and reviews the collection of ten contributions (nine articles and one review), with authors from Europe, Asia and Americam accepted for publication in the aforementioned Special Issue of Applied Sciences.


Book
Recent Advances in Nanogenerators
Authors: ---
Year: 2022 Publisher: Basel MDPI Books

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Abstract

This book focuses on both fundamental and applied research on nanogenerators. The triboelectric nanogenerator (TENG) is based on expanded Maxwell’s equations for a mechano-driven system, including the polarization density term Ps in a displacement vector owing to the electrostatic charges on medium surfaces as produced by effects such as triboelectrification. The TENGs have potential applications in blue energy, wearable devices, environmental protectioin, medical science, and security. Hybridized and coupled nanogenerators further expand the application of nanogenerators in energy stability and multi-functional sensing.


Book
The Sustainable Composite Materials in Civil and Architectural Engineering
Authors: --- ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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This book is a collection of 10 research articles (from 18 submissions) authored by researchers and peer reviewed by professionals in the field to address the use of sustainable composite materials in civil and architectural engineering over the course of more than 2 years. Fiber-reinforced plastic (FRP), geopolymers, and various recycled and repurposed waste materials are among the items addressed, used in a variety of applications from flame retardance to energy consumption. This book is a great resource for both academics and professionals in the field of engineering.


Book
Phase Change Materials: Design and Applications
Author:
Year: 2022 Publisher: Basel MDPI Books

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Abstract

There is increasingly intensive research for energy storage technologies development due to the enhanced energy needs of the contemporary societies. Increased global energy consumption results in the reduction in the availability of traditional energy resources, such as coal, oil and natural gas. Therefore, there is an urgent need for new systems development based on the conversion and storage of sustainable and clean energy. Phase change materials (PCMs) are one of the key components for the development of advanced sustainable solutions in renewable energy and engineering systems. In order to update the field of renewable energy and engineering systems with the use of PCMs, a Special Issue entitled “Phase Change Materials: Design and Applications” is introduced. This book gathers and reviews the collection of ten contributions (nine articles and one review), with authors from Europe, Asia and Americam accepted for publication in the aforementioned Special Issue of Applied Sciences.


Book
The Sustainable Composite Materials in Civil and Architectural Engineering
Authors: --- ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This book is a collection of 10 research articles (from 18 submissions) authored by researchers and peer reviewed by professionals in the field to address the use of sustainable composite materials in civil and architectural engineering over the course of more than 2 years. Fiber-reinforced plastic (FRP), geopolymers, and various recycled and repurposed waste materials are among the items addressed, used in a variety of applications from flame retardance to energy consumption. This book is a great resource for both academics and professionals in the field of engineering.


Book
Phase Change Materials: Design and Applications
Author:
Year: 2022 Publisher: Basel MDPI Books

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Abstract

There is increasingly intensive research for energy storage technologies development due to the enhanced energy needs of the contemporary societies. Increased global energy consumption results in the reduction in the availability of traditional energy resources, such as coal, oil and natural gas. Therefore, there is an urgent need for new systems development based on the conversion and storage of sustainable and clean energy. Phase change materials (PCMs) are one of the key components for the development of advanced sustainable solutions in renewable energy and engineering systems. In order to update the field of renewable energy and engineering systems with the use of PCMs, a Special Issue entitled “Phase Change Materials: Design and Applications” is introduced. This book gathers and reviews the collection of ten contributions (nine articles and one review), with authors from Europe, Asia and Americam accepted for publication in the aforementioned Special Issue of Applied Sciences.


Book
Advanced Polymer Nanocomposites
Authors: ---
ISBN: 3036559574 3036559582 Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

This Special Issue, entitled “Advanced Polymer Nanocomposites”, collects high-level original and review papers, focused on scientific discussions and practical applications in the field of functional polymer nanocomposites, including (a) optoelectronic materials (papers 1–6), (b) biomedical materials (papers 7–12), and (c) other functional polymer nanocomposites (papers 13–18).

Keywords

Technology: general issues --- POSS --- poly(vinyl chloride) --- plasticizer --- nanocomposites --- graphene --- electrically conductive adhesive --- fillers --- TiO2 --- Al2O3 --- BN --- resins --- wearable pressure sensor --- piezoresistive sensor --- fiber assembly --- nanofiber aerogel --- reduced graphene oxide --- nano-TiO2 --- poly-geminal dicationic ionic liquid --- hydroquinone --- catechol --- transparent polyimide --- nanocomposite --- film --- organoclay --- thermo-mechanical properties --- optical transparency --- CFRP --- Carbon nanotubes --- Nanocomposites --- Split Hopkinson Pressure Bar --- Energy absorption --- root canal obturation --- composites --- urethane acrylates --- nanoscale silicate platelets --- carbon dioxide-based resins --- dental resin composite --- montmorillonite --- palygorskite --- cartilage tissue --- amphiphilic gelatin microcapsules --- tissue-mimetic pellets --- magnetic stimulation --- CD44 receptor --- soluble polyimide --- polyurethane --- Jeffamine --- organic-inorganic hybrid film --- Stretchable transistor --- silicone nanoparticles --- PDMS --- TEOS --- hydrogels --- soft contact lenses --- polymerizable reduced graphene oxide --- in situ polymerization --- electrical conductivity --- dispersion of 2D nanosheets --- powder coating --- thermal conductivity --- heat dissipation --- thermal radiation --- vanadium redox flow battery --- carbon felt --- atmospheric plasma --- polyacrylonitrile --- 3D printing process --- mesoporous iron oxide --- microneedles --- minoxidil --- electrochemical polymerization --- PEDOT --- graphene oxide --- anti-fouling capability --- anti-bacterial capability --- black phosphorene --- boron nitride --- flame retardant --- waterborne polyurethane --- organic montmorillonite --- natural rubber --- damping properties --- mechanical properties


Book
Natural Degradation: Polymer Degradation under Different Conditions
Authors: ---
ISBN: 3036551344 3036551336 Year: 2022 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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This book focuses on some fundamental issues of polymers’ natural degradation. It is mostly devoted to the different aspects of biodegradation, but some data on the action of water, oxygen, ozone, and UV/Vis light is also included. The consideration of the biodegradation in vivo as the superposition of decay and synthesis provides the opportunity for a fresh look at well-known processes.

Keywords

Research & information: general --- Chemistry --- gelatin methacryloyl --- osteoinduction --- tannic acid --- crosslinking --- hydrogel --- biodegradable --- poly(3-hydroxybutyrate) --- chitosan --- electrospinning --- thermal oxidation --- biodegradation --- Sturm’s method --- biodegradation rates --- arterial hypertension --- vertebral cartilage --- rhomboid fossa --- anaerobic digestion --- biosorbent --- biostimulant --- magnetite --- nanoparticles --- kinetic model --- polyvinyl chloride (PVC) --- pyrolysis --- thermogravimetric analysis (TGA) --- kinetics --- thermodynamics --- artificial neural networks (ANN) --- mechanochemical method --- recycled polyurethane foam --- orthogonal test --- tensile strength --- thermal conductivity --- enzymatic hydrolysis --- deep eutectic solvents --- polyethylene terephthalate --- Box-Behnken design --- microwave depolymerization --- biodegradable polyester --- ultrafine electrospun fibers --- tetraphenylporphyrin --- metalloporphyrin complexes --- Fe(III) --- Sn(IV) --- X-ray diffraction --- DSC --- spin probe EPR method --- SEM --- biopolymeric nanoparticles --- synthesis --- applications --- medicine --- agriculture --- mechanical recycling --- closed-loop --- polyolefins --- circular testing --- polymer degradation --- epoxy resin --- composite material --- hygrothermal ageing --- water diffusion --- Fick model deviation --- statistical analysis --- box plot --- PCA --- titanium silicon oxide --- hydrolytic degradation --- titania --- silica --- antimicrobial activity --- photocatalytic degradation --- n/a --- Sturm's method

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