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Polymeric Foams

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ISBN: 9783039216321 / 9783039216338 Year: Pages: 322 DOI: 10.3390/books978-3-03921-633-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Chemical Engineering
Added to DOAB on : 2019-12-09 11:49:16
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Advances in nanotechnology have boosted the development of more efficient materials, with emerging sectors (electronics, energy, aerospace, etc.) demanding novel materials to fulfill the complex technical requirements of their products. This is the case of polymeric foams, which may display good structural properties alongside functional characteristics through a complex composition and (micro)structure in which a gas phase is combined with rigid ones, mainly based on nanoparticles, dispersed throughout the polymer matrix. In recent years, there has been an important impulse in the development of nanocomposite foams, extending the concept of nanocomposites to the field of cellular materials. This, alongside developments in new advanced foaming technologies which have allowed the generation of foams with micro, sub-micro, and even nanocellular structures, has extended the applications of more traditional foams in terms of weight reduction, damping, and thermal and/or acoustic insulation to novel possibilities, such as electromagnetic interference (EMI) shielding. This Special Issue, which consists of a total of 22 articles, including one review article written by research groups of experts in the field, considers recent research on novel polymer-based foams in all their aspects: design, composition, processing and fabrication, microstructure, characterization and analysis, applications and service behavior, recycling and reuse, etc.

Keywords

grey relational analysis --- multi-objective particle swarm optimization --- acoustic performances --- Ethylene Propylene Diene Monomer --- polyurethane foam composites --- DOPO --- itaconic acid --- ethyl cellulose --- phenolic foams --- composites --- adjacent façade --- PUR --- energy conservation --- heat transfer --- burning characteristic --- semi-rigid polyurethane foams --- aluminum microfibers --- quasi-static compression tests --- mechanical properties --- energy absorption capability --- foams --- polyamide --- crystalline --- thermal conductivity --- mechanical property --- functional --- biomaterials --- composites --- EMI --- cellulose foam --- polypropylene --- foaming quality --- impact property --- intrinsic toughness --- flame-retardant ABS microcellular foams --- phosphorus flame retardants --- MuCell® injection-molding foaming --- graphene oxide --- rigid polyurethane foam --- thermogravimetric analysis --- activation energies --- extrusion foaming --- super critical CO2 --- lignin --- sound absorption coefficient --- mechanical property --- Pluronic --- surfactants --- foams --- SANS --- multilayers --- epoxy composite foam adhesive --- core–shell rubber --- impact wedge–peel test --- automobile structural adhesives --- flame retardancy --- foams --- phosphorus --- ternary synergistic effect --- polypropylene --- fluoelastomer --- scCO2 foaming --- heterogeneous nucleation --- polypropylene --- cellulose nanofiber --- foam injection molding --- mechanical properties --- polystyrene foams --- 1,3,5-benzene-trisamides --- cell nucleation --- foam extrusion --- foam morphology --- supramolecular additives --- thermal insulation --- compression properties --- piezoelectric --- functional foam --- piezocomposite --- PZT --- expandable microspheres --- permittivity --- polyetherimide foams --- graphene --- multifunctional foams --- ultrasonication --- scCO2 --- electrical conductivity --- polymer waste --- polyurethane foam --- leaching test --- microstructure --- absorbent PMI foam --- metallic tube --- electromagnetic wave absorption --- mechanical properties --- failure mechanism --- polymers --- foams --- shock compression --- equation of state --- epoxy --- foams --- expandable microspheres --- graphene --- nanotubes --- conductivity --- syntactic foams --- n/a

Sports Materials

Authors: --- --- ---
ISBN: 9783039281626 / 9783039281633 Year: Pages: 166 DOI: 10.3390/books978-3-03928-163-3 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Technology (General)
Added to DOAB on : 2020-01-30 16:39:46
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Advances in materials are crucial to the development of sports equipment, from tennis rackets to skis to running shoes. Materials-driven improvements in equipment have helped athletes perform better, while enhancing safety and making sport more accessible and enjoyable. This book brings together a collection of 10 papers on the topic of sports materials, as published in a Special Issue of Applied Sciences. The papers within this book cover a range of sports, including golf, tennis, table tennis and baseball. State-of-the-art engineering techniques, such as finite element modelling, impact testing and full-field strain measurement, are applied to help further our understanding of sports equipment mechanics and the role of materials, with a view to improving performance, enhancing safety and facilitating informed regulatory decision making. The book also includes papers that describe emerging and novel materials, including auxetic materials with their negative Poisson’s ratio (fattening when stretched) and knits made of bamboo charcoal. This collection of papers should serve as a useful resource for sports engineers working in both academia and industry, as well as engineering students who are interested in sports equipment and materials.

New Trends in Recycled Aggregate Concrete

Authors: --- ---
ISBN: 9783039211401 / 9783039211418 Year: Pages: 280 DOI: 10.3390/books978-3-03921-141-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-08-28 11:21:27
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This book is the result of a Special Issue published in Applied Sciences, entitled “New Trends in Recycled Aggregate Concrete"". It identifies emerging research areas within the field of recycled aggregate concrete and contributes to the increased use of this eco-efficient material.Its contents are organised in the following sections: Upscaling the use of recycled aggregate concrete in structural design; Large scale applications of recycled aggregate concrete; Long-term behaviour of recycled aggregate concrete; Performance of recycled aggregate concrete in very aggressive environments; Reliability of recycled aggregate concrete structures; Life cycle assessment of recycled aggregate concrete; New applications of recycled aggregate concrete.

Keywords

reactive power concrete --- shrinkage --- creep --- steel fibre --- model --- compressive strength --- models --- geological nature of aggregates --- quality of aggregates --- concrete --- recycled aggregates --- seismic load --- strain rate --- fiber-reinforced concrete --- dynamic mechanical property --- recycled aggregate quality --- bond strength --- shear behavior --- aggregate interlock mechanism --- size effect --- ready-mixed concrete --- recycled concrete aggregates --- returned concrete --- concrete sludge fines --- soil stabilization --- recycled aggregate --- recycled aggregate concrete --- artificial neural networks --- aggregate characteristic --- input variable --- recycled concrete --- aggregate --- mixture proportioning --- flexural behavior --- recycling --- heavyweight waste glass --- cyclic load --- reinforced concrete member --- recycled aggregate concrete (RAC) --- steel reinforced recycled aggregate concrete (SRRAC) --- elevated temperature --- residual properties --- recycled coarse aggregate concrete --- nylon fiber --- mechanical properties --- permeability --- microstructure --- foam concrete --- cellular concrete --- ceramic foam --- modulus --- crushing --- energy absorbing --- CT --- foam structure --- foam stability --- recycled aggregate --- concrete --- life cycle assessment --- environmental impact --- recycled concrete aggregate --- crumb rubber --- crushed glass --- compressive strength --- tensile splitting strength --- water absorption --- concrete --- aggregates --- fly-ash --- silica fume --- blast-furnace slag --- mechanical properties --- water absorption --- reinforced concrete --- recycled aggregate concrete --- columns --- seismic performance --- numerical analysis --- variable sensitivity --- recycled aggregate --- concrete --- construction waste --- mechanical characteristics --- durable characteristics --- n/a

Colloids and Interfaces in Oil Recovery

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ISBN: 9783039211067 / 9783039211074 Year: Pages: 234 DOI: 10.3390/books978-3-03921-107-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Added to DOAB on : 2019-06-26 08:44:06
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It is well-known that colloid and interface science and petroleum production are inextricably linked. Whether in the reservoir, with its porous structure, or during recovery, crude oil is intimately associated with rock surfaces and with water, often in the form of emulsions. This situation leads to highly complex systems, comprising multiple colloids and interfaces, which require to be optimized if oil is to be recovered efficiently, both in terms of economic cost and with due concern for the environment. This book contains a compilation of contemporary research topics which illustrate various aspects of the importance of colloids and interfaces in crude oil recovery through modifying conditions between the rock, crude oil, and water in the reservoir, in order to achieve improved oil recovery. The specific topics covered relate both to conventional oils, in which waterflooding is the most common secondary and tertiary means of recovery, and to non-conventional heavy oil and natural bitumen, which require thermal recovery methods, owing to their high viscosity.

Ceramic Conductors

Authors: ---
ISBN: 9783038979562 / 9783038979579 Year: Pages: 184 DOI: 10.3390/books978-3-03897-957-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-06-26 08:44:06
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This Special Issue of Crystals contains papers focusing on various properties of conducting ceramics. Multiple aspects of both the research and application of this group of materials have been addressed. Conducting ceramics are the wide group of mostly oxide materials which play crucial roles in various technical applications, especially in the context of the harvesting and storage of energy. Without ion-conducting oxides, such as yttria-stabilized zirconia, doped ceria devices such as solid oxide fuel cells would not exist, not to mention the wide group of other ion conductors which can be applied in batteries or even electrolyzers, besides fuel cells. The works published in this Special Issue tackle experimental results as well as general theoretical trends in the field of ceramic conductors, or electroceramics, as it is often referred to.

Synthesis, Study and Utilization of Natural Products

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ISBN: 9783039281527 / 9783039281534 Year: Pages: 234 DOI: 10.3390/books978-3-03928-153-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemical Engineering --- Technology (General)
Added to DOAB on : 2020-01-30 16:39:46
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Natural products and the preparations based on them play a stable and ever-increasing role in human and veterinary medicine, agriculture, in food and the cosmetic industry, and in an increasing number of other fields. Their importance is based on the fact that they are mostly bound to renewable sources, which in fact makes them valuable within a circular economy, inter alia. At the same time, natural products provide the origin of stereochemistry, optical activity, regioselectivity, chirality, and many other concepts and directions within science, development, and industry in a scope, which is indispensable. They serve as a constant powerful stimulus and model that inspires researchers to create new effective tools, similar to natural ones, for controlling bioregulation mechanisms and solving practical problems. This was the reason for organizing this Special Issue aimed at underlining the current developments in all the fields connected to natural products.

Keywords

insect sex pheromone --- tea tussock moth --- total synthesis --- resource chemistry --- phycocyanin --- biosynthesis --- antioxidant --- Spirulina --- gene expression --- apo-CpcB --- Plantago depressa --- octadecanoid --- fatty acid --- natural enantiomer --- anti-inflammation --- soy protein isolate --- bromelain --- triglycidylamine --- viscosity --- water resistance --- adhesive --- Ramulus mori --- polysaccharides --- bioactivity --- synthesis of natural products --- varioxiranol A --- 4-epi-varioxiranol A --- absolute structure --- Emericella variecolor --- caffeoylquinic acids --- chlorogenic acid --- derivatives --- lipid-lowering effects --- oleic acid-elicited --- HepG2 cells --- isosorbide --- reversible urethane linkages --- cell opening --- antioxidant activity --- radical scavenger --- flexible polyurethane foam --- tomato --- SlCOMT1 --- melatonin --- genetical transformation --- salt stress --- natural product --- RiPP --- ribosomally synthesized --- post-translationally modified peptides --- rheumatoid arthritis --- natural products --- polyphenol --- flavonoids --- phenolic acid --- stilbene --- ginkgolide --- platelet-activating factor receptor --- inhibitor --- pinocembrin --- microbial biosynthesis --- pharmacological activities --- pharmacokinetic features --- research progress --- triterpenoids --- bardoxolone methyl --- anticancer drug --- mitochondria --- apoptosis --- cancer cells --- cytotoxicity --- flow cytometry --- live-cell fluorescence microscopy --- PEGylated purpurin 18 --- photodynamic therapy --- photosensitizer --- phototoxicity --- singlet oxygen --- n/a

Soil Water Conservation. Dynamics and Impact

Authors: --- --- ---
ISBN: 9783038978527 9783038978534 Year: Pages: 258 DOI: 10.3390/books978-3-03897-853-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Environmental Technology
Added to DOAB on : 2019-04-25 16:37:17
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Human needs like food and clean water are directly related to good maintenance of healthy and productive soils. A good understanding of human impact on the natural environment is therefore necessary to preserve and manage soil and water resources. This knowledge is particularly important in semi-arid and arid regions, where the increasing demands on limited water supplies require urgent efforts to improve water quality and water use efficiency. It is important to keep in mind that both soil and water are limited resources. Thus, wise use of these natural resources is a fundamental prerequisite for the sustainability of human societies. This book collects 15 original scientific contributions addressing the state of the art of soil and water conservation research. Contributions cover a wide range of topics, including (1) recovery of soil hydraulic properties; (2) erosion risk; (3) novel modeling, monitoring and experimental approaches for soil hydraulic characterization; (4) improvement of crop yields; (5) water availability; and (6) soil salinity. This collection provides more insights into conservation strategies for effective and sustainable soil and water management.

Keywords

soil moisture storage --- van Genuchten model --- distributed model --- Xin’anjiang model --- TOPMODEL --- bimsoils --- critical hydraulic gradient (CHG) --- response surface methodology --- multi-parameter evaluation --- laboratory experiment --- soil block --- subsurface flow --- macropore network --- spatial scale --- polyurethane foam --- hillslope --- soil water content --- field observation --- three-dimensional model --- numerical model --- delta plain --- shallow groundwater --- unsaturated soil --- Richards equation --- the Trefftz method --- transient --- the meshless method --- vineyards --- infiltration rate --- age of planting --- saturated hydraulic conductivity --- Malawi --- conservation agriculture --- peer effects --- decision tree modeling --- olive grove --- sap flow --- relative transpiration --- FDR sensor --- EM38 --- fraction transpiration soil water --- transdisciplinary research --- Follow-the-Innovation --- innovation development --- electromagnetic induction meter (EM) --- The Agricultural Production Systems sIMulator (APSIM) software --- AquaCrop --- cereals --- DSSAT --- field scattering --- food security --- microdose fertilization --- rainfall variability --- tied ridges --- upgrading strategies --- soil properties --- saturated soil hydraulic conductivity --- soil infiltration --- Beerkan method --- post-fire soil hydraulic characterization --- infiltration --- bottomless bucket method --- single-ring infiltrometer --- field-saturated soil hydraulic conductivity --- data analysis procedures --- environmental change --- local perception --- food security --- adaptation --- soil tillage --- tillage erosion --- seedbed preparation --- water infiltration --- nitrogen use efficiency --- specific leaf water content --- vegetable production --- soil --- yield --- water and soil conservation --- sustainable land management --- soil erosion --- soil water storage --- water infiltration --- water availability --- crop yields

Recent Advances in Biocatalysis and Metabolic Engineering for Biomanufacturing

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ISBN: 9783039215744 / 9783039215751 Year: Pages: 278 DOI: 10.3390/books978-3-03921-575-1 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Biotechnology
Added to DOAB on : 2019-12-09 11:49:15
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The use of biocatalysts, including enzymes and metabolically engineered cells, has attracted a great deal of attention in the chemical and bio-industry, because biocatalytic reactions can be conducted under environmentally-benign conditions and in more sustainable ways. The catalytic efficiency and chemo-, regio-, and stereo-selectivity of enzymes can be enhanced and modulated using protein engineering. Metabolic engineering seeks to enhance cellular biosynthetic productivity of target metabolites via controlling and redesigning metabolic pathways using multi-omics analysis, genome-scale modeling, metabolic flux control, and reconstruction of novel pathways. The aim of this book is to cover the recent advances in biocatalysis and metabolic engineering for biomanufacturing of biofuels, chemicals, biomaterials, and pharmaceuticals. Reviews and original research articles on the development of new strategies to improve the catalytic efficiency of enzymes, biosynthetic capability of cell factories, and their applications in production of various bioproducts and chemicals are included.

Keywords

artificial self-sufficient P450 --- bioplastics --- dodecanoic acid --- Nylon 12 --- ?-aminododecanoic acid --- immobilization --- fluorescein diacetate --- polyurethane foam --- biofilm --- total enzymatic activity --- biocatalysis --- Combi-CLEAs --- cascade reactions --- immobilization --- Myceliophthora --- glyoxal oxidase --- 5-hydroxymethylfurfural --- aerobic methane bioconversion --- bioreactor --- string film reactor --- mass transfer performance --- cross-linked enzyme aggregate --- amyloglucosidase --- magnetic nanoparticles --- bovine serum albumin --- polyethyleneimine --- starch hydrolysis --- Eversa --- interfacial activation --- lipase immobilization --- enzyme stabilization --- enzyme modulation --- metabolic engineering --- synthetic biology --- 3-hydroxypropionic acid --- microbial production --- fatty acid synthesis --- acetate --- redox enzymes --- FTIR spectroscopy --- small molecules --- Corynebacterium glutamicum --- Pvgb --- tunable expression system --- expression vectors --- synthetic biology --- Vitreoscilla --- vgb --- biocatalysts --- biocatalytic reaction --- Methylosinus sporium strain 5 --- soluble methane monooxygenase --- C–H activation --- O2 activation --- synthetic biology --- metabolic engineering --- microbial cell factory --- synthetic metabolic pathways --- mannose --- magnetic nanoparticles --- immobilization --- whole cell --- specific recognition --- 12-hydroxydodecanoic acid --- dodecanoic acid --- CYP153A --- whole-cell biotransformation --- Candida antarctica Lipase B --- transesterification --- polymer functionalization --- tetraethylene glycol --- poly(ethylene glycol) --- hydrogenase --- bio-hydrogen --- chemicals addition --- review --- (?)-?-bisabolol --- mevalonate (MVA) --- mevalonate kinase 1 --- Methanosarcina mazei --- fed-batch fermentation --- monoterpene --- prokaryotic microbial factory --- metabolic engineering --- MEP pathway --- MEV pathway --- n/a

Advances in Mechanical Problems of Functionally Graded Materials and Structures

Authors: --- --- ---
ISBN: 9783039216581 / 9783039216598 Year: Pages: 262 DOI: 10.3390/books978-3-03921-659-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Mathematics
Added to DOAB on : 2019-12-09 11:49:16
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The book deals with novel aspects and perspectives in functionally graded materials (FGMs), which are advanced engineering materials designed for a specific performance or function with spatial gradation in structure and/or composition. The contributions mainly focus on numerical simulations of mechanical properties and the behavior of FGMs and FGM structures. Several advancements in numerical simulations that are particularly useful for investigations on FGMs have been proposed and demonstrated in this Special Issue. Such proposed approaches provide incisive methods to explore and predict the mechanical and structural characteristics of FGMs subjected to thermoelectromechanical loadings under various boundary and environmental conditions. The contributions have resulted in enhanced activity regarding the prediction of FGM properties and global structural responses, which are of great importance when considering the potential applications of FGM structures. Furthermore, the presented scientific scope is, in some way, an answer to the continuous demand for FGM structures, and opens new perspectives for their practical use.

Keywords

functionally graded beams --- different moduli in tension and compression --- bimodulus --- analytical solution --- neutral layer --- quadratic solid–shell elements --- finite elements --- functionally graded materials --- thin structures --- geometrically nonlinear analysis --- functionally graded piezoelectric materials --- circular plate --- combined mechanical loads --- electroelastic solution --- ANFIS --- fuzzy logic --- clustering --- neural networks --- robotics and contact wear --- evanescent wave --- polynomial approach --- functionally graded piezoelectric-piezomagnetic material --- dispersion --- attenuation --- functional graded saturated material --- inhomogeneity --- Love wave --- dispersion --- attenuation --- porous materials --- truncated conical sandwich shell --- metal foam core layer --- non-linear buckling analysis --- orthogonal stiffener --- elastic foundation --- functionally graded plate --- power-law distribution --- high order shear deformation theory --- elastic foundation --- stepped FG paraboloidal shell --- general edge conditions --- spring stiffness technique --- free vibration characteristics --- Lamb wave --- functionally graded viscoelastic material --- minimum module approximation method --- damping coefficient --- functionally graded materials --- finite element analysis --- graded finite elements --- functionally graded materials --- inhomogeneous composite materials --- material design --- stress concentration factor --- failure and damage --- elliptical hole --- finite element method --- hollow disc --- external pressure --- residual stress --- residual strain --- flow theory of plasticity --- functionally graded materials --- elastoplastic analysis --- pure bending --- residual stress --- large strain

Polymer Clay Nano-composites

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ISBN: 9783039216529 / 9783039216536 Year: Pages: 246 DOI: 10.3390/books978-3-03921-653-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-12-09 11:49:16
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This Special Issue focuses on the current state-of-the-art of “Polymer Clay Nano-Composites” for biomedical, anticorrosion, antibacterial, and other applications. Clay–polymer composite nanomaterials represent an emerging area of research. Loading polymers with clay particles essentially enhances the composite strength features. Of particular interest are different nano-assembly methods, such as silane mono and multilayers, polyelectrolyte layer-by-layer assembly, and others. An important development was reached for tubular and fibrous clay nanoparticles, such as halloysite, sepiolite, and imogolite. Polymer clay nanoparticles can be prepared as sheets with 1-nm thickness and width of a few hundred nm (e.g., kaolin and montmorillonite). Fibrous clays significantly reinforce the nano-composites in the assembly with biopolymers and other green polymers, leading to functional hybrid bio nano-composites. The scope of this Special Issue comprehensively includes the synthesis and characterization of polymer clay nano-composites used for several applications, including nano-clay polymer composites and hybrid nano-assemblies.

Keywords

polyimide --- graphene oxide --- composite --- mechanical properties --- indentation recovery --- AFM --- carbon fibers --- surface grafting --- halloysite nanotubes --- polymer composites --- interface --- fish gelatin --- halloysite nanotubes --- glycerol --- mechanical properties --- water resistance --- LAP --- hyaluronic acid --- doxorubicin --- CD44 receptor targeted --- sacrificial bond --- ionic network --- organic montmorillonite --- 1,2-polybutadiene --- in-situ intercalation --- clay–polymer nanocomposites --- atrazine --- radical polymerization --- hexadecyltrimethylammonium bromide --- phenyltrimethylammonium chloride --- FTIR --- TGA --- adsorption --- dental resins --- nanocomposite materials --- organically modified clays --- montmorillonite --- intercalation --- nanotechnology --- ammonium persulfate --- fuzzy optimization --- N,N?-methylenebisacrylamide --- Pareto set --- polyacrylic acid --- swelling capacity --- variable cost --- polyethylene oxide --- montmorillonite clays --- Pd catalysis --- catalytic composite --- positron annihilation --- doubly functionalized montmorillonite --- polystyrene --- soap-free emulsion polymerization --- thermal stability --- tribological property --- organo-clays --- polyamines --- clay-amine interaction mechanisms --- structure effects --- la uptake and release --- layered silicate --- sericite --- CTAB --- intercalation stability --- nanocomposites --- gelation kinetics --- sol–gel transition --- water shutoff --- silica sol --- cellulose nanofibrils --- halloysite nanotubes --- supercritical CO2 --- polystyrene foam --- blowing agent --- in situ polymerization --- attapulgite/polypyrrole nanocomposite --- halloysite nanotubes --- polysaccharide --- interfacial interactions --- reinforcing --- adsorption --- dispersion --- coatings --- whey protein isolate --- nanocomposites --- nanoclay, barrier --- morphology --- n/a

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