Relevant bibliographies by topics / Porous materials

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Porous materials'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 August 2024

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Journal articles on the topic "Porous materials"

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Szilágyi, Katalin, Adorján Borosnyói, and Zoltán Gyurkó. "Static hardness testing of porous building materials." Epitoanyag-Journal of Silicate Based and Composite Materials 65, no. 1 (2013): 6–10. http://dx.doi.org/10.14382/epitoanyag-jsbcm.2013.2.

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Beck, J. S., C. T. Kresge, and S. B. McCullen. "Porous materials." Zeolites 15, no. 4 (May 1995): 382. http://dx.doi.org/10.1016/0144-2449(95)99128-a.

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Clegg, W. J., and L. J. Vandeperre. "OS08W0147 Cracking and thermal shock in porous materials." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003): _OS08W0147. http://dx.doi.org/10.1299/jsmeatem.2003.2._os08w0147.

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Schaefer, Dale W. "Engineered Porous Materials." MRS Bulletin 19, no. 4 (April 1994): 14–19. http://dx.doi.org/10.1557/s0883769400039452.

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Rustum Roy recently observed that, operating from a finite number of elements, materials science faces an over-supply problem, too many scientists, and too few elements. Like all Malthusian dilemmas, relief is unlikely within the assumptions. Materials scientists, however, enjoy opportunities to develop new materials through morphological engineering of traditional substances. Carbon, after all, provided a century of progress for polymer chemists and a revolution in the manufacturing world. The trend from atomic- to molecular- to chain-level engineering can obviously be extended to mesostructure engineering and beyond. The tailoring of porosity is an example of such an extension.This issue of the MRS Bulletin examines the concept of engineered porosity from three perspectives. Smith, Hua, and Earl discuss characterization based on classic gas adsorption and more recent NMR and scattering methods. Two articles, one by Harold and Lee, and the other by Fain, look at the pore structure requirements for important applications, reactive separations and gas separation. Finally, the materials science of engineered porosity is discussed in four articles. Even describes emulsion-derived foams in which surface-active species impose micron-scale structure that is retained during polymerization. Shapovalov broadly reviews methods to introduce porosity in metals. Durian discusses recent work on relaxation phenomena in aqueous foams. Finally, I review the factors that control structure in mesoporous aerogels.
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Goldsmid, Hiroshi. "Porous Thermoelectric Materials." Materials 2, no. 3 (August 5, 2009): 903–10. http://dx.doi.org/10.3390/ma2030903.

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Ślósarczyk, Anna, and Zofia Paszkiewicz. "Porous Bioceramic Materials." Key Engineering Materials 206-213 (December 2001): 1621–24. http://dx.doi.org/10.4028/www.scientific.net/kem.206-213.1621.

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Zaworotko, Michael J. "Hybrid porous materials." Acta Crystallographica Section A Foundations and Advances 71, a1 (August 23, 2015): s112. http://dx.doi.org/10.1107/s2053273315098356.

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Danowski, Wojciech, Thomas van Leeuwen, Wesley R. Browne, and Ben L. Feringa. "Photoresponsive porous materials." Nanoscale Advances 3, no. 1 (2021): 24–40. http://dx.doi.org/10.1039/d0na00647e.

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Integration of molecular photoswitches in porous materials i.e. MOFs, COFs, PAFs provides responsive materials with a variety of functions ranging from switchable gas adsorption to macroscopic actuation.
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Kitagawa, Susumu. "Future Porous Materials." Accounts of Chemical Research 50, no. 3 (March 21, 2017): 514–16. http://dx.doi.org/10.1021/acs.accounts.6b00500.

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Barton, Thomas J., Lucy M. Bull, Walter G. Klemperer, Douglas A. Loy, Brian McEnaney, Makoto Misono, Peter A. Monson, et al. "Tailored Porous Materials." Chemistry of Materials 11, no. 10 (October 1999): 2633–56. http://dx.doi.org/10.1021/cm9805929.

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Dissertations / Theses on the topic "Porous materials"

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Zhang, Jin. "Shakedown of porous materials." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I044/document.

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Cette thèse est consacrée à la détermination des états limites de l'adaptation des matériaux ductiles poreux sur la base du théorème de Melan et en considérant le modèle de la sphère creuse. Dans un premier temps, nous proposons le critère analytique macroscopique d'adaptation avec la matrice de von Mises sous deux charges particuliers, alterné et pulsé. Le critère analytique dépend des première et seconde invariants des contraintes macroscopiques, du signe du troisième et du coefficient de Poisson. Ensuite, ce critère est étendu aux charges cycliques répétées générales par la construction d'un champ de contraintes résiduelles d'essai plus approprié permettant simultanément des calculs analytiques et l'amélioration du modèle précédent. De plus, il est également utilisé pour les matériaux ductiles poreux avec une matrice de Drucker-Prager.L'idée repose d'abord sur la solution exacte pour le charge purement hydrostatique. Il s'avère que la ruine se produit par fatigue. Ensuite, des champs de contrainte d'essai appropriés sont construits avec des termes supplémentaires pour capter les effets de cisaillement. Le domaine de sécurité, défini par l'intersection du domaine d'adaptationet celui d'analyse limite (la ruine survenant brusquement par formation d'un mécanisme au premier cycle), est entièrement comparé avec des simulations élasto-plastique incrémentales et des calculs directs simplifiés.Enfin, nous fournissons une méthode numérique directe pour prédire le domaine de sécurité de l'adaptation des matériaux poreux soumis à des charges variant de manière indépendante en considérant le chemin critique du domaine de chargement au lieu de l'histoire entière. Le problème de l'adaptation est transformé en un problème d'optimisation de grande taille, qui peut être résolu efficacement par l'optimiseur non-linéaire IPOPT pour donner non seulement le facteur de charge limite, mais aussi le champ de contrainte résiduelle correspondant à l'état d'adaptation
This thesis is devoted to the determination of shakedown limit states of porous ductile materials based on Melan's static theorem by considering the hollow sphere model, analytically and numerically. First of all, we determine the analytical macroscopic shakedown criterion of the considered unit cell with von Mises matrix under alternating and pulsating special loading cases. The proposed macroscopic analytical criterion depends on the first and second macroscopic stresses invariants, the sign of the third one and Poisson's ratio. Then, the procedure is extended to the general cyclically repeated loads by the construction of a more appropriate trial residual stress field allowing analytical computations and the improvement of the previous model simultaneously. Moreover, this approach is applied to porous materials with dilatant Drucker-Prager matrix.The idea relies firstly on the exact solution for the pure hydrostatic loading condition. It turns out that the collapse occurs by fatigue. Next, suitable trial stress fields are built with additional terms to capture the shear effects. The safety domain, defined by the intersection of the shakedown limit domain and the limit analysis domain corresponding to the sudden collapse by development of a mechanism at the first cycle, is fully compared with step-by-step incremental elastic-plastic simulations and simplified direct computations. At last, we provide a direct numerical method to predict the shakedown safety domain of porous materials subjected to multi-varying independent loadings by considering the critical loading path of the load domain instead of the whole history. The shakedown problem is transformed into a large-size optimization problem, which can be solved efficiently by the non-linear optimizer IPOPT to give out not only the limit load factor, but also the corresponding residual stress field for the shakedown state
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Gong, Xuehui. "POROUS POLYMERIC FUNCTIONAL MATERIALS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1595256175834586.

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NEGRONI, MATTIA. "Dynamics in Porous Materials." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2020. http://hdl.handle.net/10281/263115.

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Il mio lavoro di tesi si è basato sulla caratterizzazione dei materiali porosi rivolgendo particolare attenzione alla ricerca di elementi dinamici all’interno delle strutture e allo studio dei gas adsorbiti. Sono riuscito a rilevare la presenza di rotori parafenilenici ultraveloci sia in cristalli molecolari porosi che in metal-organic framework (MOF). Uno studio più approfondito ha inoltre rivelato come questi moti siano influenzati dal gas adsorbito. Nello specifico l’energia di attivazione della rotazione aumenta in funzione della quantità di gas nei pori. Per meglio capire questa interazione è però fondamentale la conoscenza del comportamento dei gas nei materiali porosi. Ho pertanto rivolto la mia attenzione allo studio del moto di xeno e CO2 in diversi materiali. L’utilizzo combinato di NMR e calcoli ab initio si è rivelato fondamentale per la comprensione di questi fenomeni ed è stato possibile rivelare particolari caratteristiche tanto dei gas quanto dei materiali stessi. La complessità della diffusione all’interno dei canali si è anche presentata in modi insoliti come il moto elicoidale dell’anidride carbonica imposto dal potenziale elettrostatico. Volendo continuare lo studio dei gas nei pori, ho caratterizzato diversi porous aromatic framework (PAF) con la tecnica dello xeno iperpolarizzato. Questo non mi ha consentito solo di misurare con accuratezza le dimensioni dei pori ma anche calcolare l’energia di interazione tra lo xeno e le pareti dei canali. Desiderando espandere le mie conoscenze sull’iperpolarizzazione come tecnica NMR, ho passato sei mesi presso il gruppo del Prof. L. Emsley a Losanna imparando la dynamic nuclear polarization (DNP) nonché la sua applicazione a diversi materiali.
My thesis work was based on the characterization of porous materials, paying particular attention to the research of dynamic elements within the structures and to the study of adsorbed gases. I was able to detect the presence of ultrafast paraphenylenic rotors in both porous molecular crystals and metal-organic frameworks (MOFs). A more detailed study has also revealed how these motions are influenced by the adsorbed gas. Specifically, the activation energy of the rotation increases as a function of the quantity of gas in the pores. To better understand this interaction, the knowledge of the behavior of gases in porous materials is fundamental. I turned my attention to the study of xenon and CO2 motion in different materials. The combined use of NMR and ab initio calculations proved to be fundamental for understanding these phenomena and it was possible to reveal particular characteristics both of the gases and of the materials. The complexity of the diffusion within the channels has also been presented in unusual ways as the helicoidal motion of carbon dioxide imposed by the electrostatic potential. To continue the study of pore gases, I characterized several porous aromatic frameworks (PAFs) with the hyperpolarized xenon technique. This not only allowed me to accurately measure the pore size but also to calculate the interaction energy between the xenon and the channel walls. To expand my knowledge on hyperpolarization as an NMR technique, I spent six months at the group of Prof. L. Emsley in Lausanne learning dynamic nuclear polarization (DNP) as well as its application to different materials.
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Jiang, Tong. "Porous tin(IV) sulfide materials." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0007/NQ41557.pdf.

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Tchang, Cervin Nicholas. "Porous Materials from Cellulose Nanofibrils." Doctoral thesis, KTH, Fiberteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155065.

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In the first part of this work a novel type of low-density, sponge-like material for the separation of mixtures of oil and water has been prepared by vapour deposition of hydrophobic tri-chloro-silanes on ultra-porous cellulose nanofibril (CNF) aerogels. To achieve this, a highly porous (>99%) robust CNF aerogel with high structural flexibility is first formed by freeze-drying an aqueous suspension of the CNFs. The density, pore size distribution and wetting properties of the aerogel can be tuned by selecting the concentration of the CNF suspension before freeze-drying. The hydrophobic light-weight aerogels are almost instantly filled with the oil phase when they selectively absorb oil from water, with a capacity to absorb up to 45 times their own weight. The oil can subsequently be drained from the aerogel and the aerogel can then be subjected to a second absorption cycle. The second part is about aerogels with different pore structures and manufactured with freeze-drying and supercritical carbon dioxide for the preparation of super slippery surfaces. Tunable super slippery liquid-infused porous surfaces (SLIPS) were fabricated through fluorination of CNFsand subsequent infusion with perfluorinated liquid lubricants. CNF-based self-standing membranes repelled water and hexadecane with roll-off angles of only a few degrees. The lifetime of the slippery surface was controlled by the rate of evaporation of the lubricant, where the low roll-off angle could be regained with additional infusion. Moreover, adjusting the porosity of the membranes allowed the amount of infused lubricant to be tuned and thereby the lifetime. The CNF-based process permitted the expansion of the concept to coatings on glass, steel, paper and silicon. The lubricant-infused films and coatings are optically transparent and also feature self-cleaning and self-repairing abilities. The third part describes how porous structures from CNFs can be prepared in a new way by using a Pickering foam technique to create CNF-stabilized foams. This technique is promising for up-scaling to enable these porous nanostructured cellulose materials to be produced on a large scale. With this technique, a novel, lightweight and strong porous cellulose material has been prepared by drying aqueous foams stabilized with surface-modified CNFs. Confocal microscopy and high-speed video imaging show that the long-term stability of the wet foams can be attributed to the octylamine-coated, rod-shaped CNF nanoparticles residing at the air-liquid interface which prevent the air bubbles from collapsing or coalescing. Careful removal of the water yields a porous cellulose-based material with a porosity of 98 %, and measurements with an autoporosimeter (APVD) reveal that most pores have a radius in the range of 300 to 500 μm. In the fourth part, the aim was to clarify the mechanisms behind the stabilizing action of CNFs in wet-stable cellulose foams. Factors that have been investigated are the importance of the surface energy of the stabilizing CNF particles, their aspect ratio and charge density, and the concentration of CNF particles at the air-water interface. In order to investigate these parameters, the viscoelastic properties of the interface have been evaluated using the pendant drop method. The properties of the interface have also been compared by foam stability tests to clarify how the interface properties can be related to the foam stability over time. The most important results and conclusions are that CNFs can be used as stabilizing particles for aqueous foams already at a concentration as low as 5 g/L. The reasons for this are the high aspect ratio which is important for gel formation and the viscoelastic modulus of the air-water interface. Foams stabilized with CNFs are therefore much more stable than foams stabilized by cellulose nanocrystals (CNC). The charge density of the CNFs affects the level of liberation of the CNFs within large CNF aggregates and hence the number of contact points at the interface, and also the gel formation and viscoelastic modulus. The charges also lead to a disjoining pressure related to the long-range repulsive electrostatic interaction between the stabilized bubbles, and this contributes to foam stability. In the fifth part, the aim was to develop the drying procedure in order to producea dry porous CNF material using the wet foam as a precursor and to evaluate the dry foam properties. The wet foam was dried in an oven while placed on a liquid-filled porous ceramic frit to preserve and enhance the porous structure in the dried material and prevent the formation of larger cavities and disruptions. The cell structure has been studied by SEM microscopy and APVD (automatic pore volume distribution). The mechanical properties have been studied by a tensile tester (Instron 5566) and the liquid absorption ability with the aid of the APVD-equipment. By changing the charge density of the CNFs it is possible to prepare dry foams with different densities and the lowest density was found to be 6 kg m-3with a porosity of 99.6 %. The Young ́s modulus in compression was 50 MPa and the energy absorption was 2340kJ m-3 for foams with a density of 200 kg m-3. The liquid absorption of the foam with a density of 13 kg m-3 is 34 times its own weight. By chemically cross-linking the foam,it wasalso possible to empty the liquid-filled foams by compression and then to reabsorb the liquid to the same degree with maintained foam integrity. This new processing method also shows great promise for preparing low-density cellulose foams continuously and could be very suitable for industrial up-scaling.

QC 20141103

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Chow, Hon-nin. "Computer aided modelling of porous structures." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B39848929.

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Harter, Thomas. "Unconditional and conditional simulation of flow and transport in heterogeneous, variably saturated porous media." Diss., The University of Arizona, 1994. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1994_36_sip1_w.pdf&type=application/pdf.

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Jacobs, Tia. "Self-assembly of new porous materials." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/3970.

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Thesis (PhD (Chemistry and Polymer Science))--University of Stellenbosch, 2009.
ENGLISH ABSTRACT: The primary objective of the work was to prepare and investigate new porous materials using the principles of crystal engineering. Both organic and metal-organic systems were studied and the work can best be divided into two separate sections: 1. The crystal engineering of Dianin’s Compound, a well-known organic host. 2. The design and synthesis of a series of related porous coordination compounds consisting of discrete, dinuclear metallocycles. The first section discusses the synthetic modification of Dianin’s compound in order to engineer a new clathrate host with an altered aperture size. Although this study ultimately failed to isolate the host material in its porous guest-free form, the work led to the discovery of a chiral host framework that aligns guest molecules in a polar fashion, and consequently displays non-linear optical properties. These findings are unprecedented in the long history of crystal engineering of Dianin’s compound and its analogues. This section also describes desorption studies of the new inclusion compound, as well as the known thiol analogue of Dianin’s compound. Systematic characterisation of these desorbed phases has raised interesting fundamental questions about desolvation processes in general. The second section constitutes the major portion of the work. A series of related isostructural coordination metallocycles were synthesised and their structure-property relationships were investigated using a variety of complementary techniques. These metallocyclic compounds all crystallise as solvates in their as-synthesised forms, and different results are obtained upon desolvation of the materials. In each case, desolvation occurs as a single-crystal to single-crystal transformation and three new “seemingly nonporous” porous materials were obtained. A single-crystal diffraction study under various pressures of acetylene and carbon dioxide was conducted for one of the porous metallocycles. This enabled the systematic study of the host deformation with increasing equilibrium pressure (i.e. with increasing guest occupancy). The observed differences in the sorption behaviour for acetylene and carbon dioxide are discussed and rationalised. Gravimetric gas sorption isotherms were also recorded for the three different porous materials and the diffusion of bulkier molecules through the host was also investigated structurally. Finally, a possible gas transport mechanism is postulated for this type of porous material (i.e. seemingly nonporous), and this is supported by thermodynamic and kinetic studies, as well as molecular mechanics and statistical mechanics simulations.
AFRIKAANSE OPSOMMING: Die primêre doel van die werk was om nuwe poreuse materiale te berei en deur die toepassing van beginsels van kristalmanipulasie (E. crystal engineering) te ondersoek. Beide organiese- en metaal-organiese sisteme is bestudeer en die werk kan in twee kategorieë verdeel word: 1. Die kristalmanipulasie van Dianin se verbinding, ’n bekende organiese gasheer. 2. Die ontwerp en sintese van ’n reeks verwante poreuse koördinasieverbindings wat uit diskrete, binukleêre metallosiklieseverbindings bestaan. Die eerste deel handel oor die sintetiese verandering van Dianin se verbinding om ’n nuwe klatraatgasheer met ’n veranderde spleetgrootte te vorm. Alhoewel hierdie studie nie daarin geslaag het om die gasheer in sy poreuse “gas(E. guest)-vrye” vorm te isoleer nie, het die werk ’n nuwe chirale gasheerraamwerk aan die lig gebring. Die chirale gasheerraamwerk rig gas(E. guest)molekules in eendimensionele kolomme op ’n polêre wyse en gevolglik vertoon die materiaal nie-linieêre optiese eienskappe. Hierdie resultaat is ongekend in die lang geskiedenis van kristalmanipulasie van Dianin se verbindings en sy analoë. Hierdie afdeling beskryf ook die desorpsiestudies van die nuwe gasheer, en die tiol-afgeleide van Dianin se verbinding. Die sistematiese karakterisering van hierdie fases na desorpsie het fundamentale vrae na vore gebring oor desorpsieprosesse oor die algmeen. Die tweede afdeling maak die grootste gedeelte van die werk uit. ’n Reeks verwante isostrukturele ringvormige koördinasieverbindings is gesintetiseer en hul struktuureienskap verhoudings is deur ’n verskeidenheid komplementêre tegnieke ondersoek. Hierdie metallosiklieseverbindings kristalliseer almal in gesolveerde toestand vanaf sintese en verskillende resultate word verkry wanneer die verbinding desorpsie ondergaan. In alle gevalle vind gas(E. guest)desorpsie as enkel-kristal na enkel-kristal omsettings plaas en drie nuwe ‘oënskynlik nie-poreuse’ poreuse materiale is bekom. ’n Enkelkristal diffraksiestudie onder verskeie gasdrukke is met asetileen en koolstofdioksied uitgevoer vir een van die poreuse metallosiklieseverbindings. Dit het die geleentheid geskep om die mate waartoe die gasheer as gevolg van verhoogde ewewigsdruk vervorm (en dus toename in gasheerbesetting), sistematies te bestudeer. Die waargenome verskille in sorpsie-optrede vir asetileen en koolstofdioksied word bespreek en verklaar. Gravimetriese gassorpsie isoterme is ook vir die drie poreuse materiale verkry en die diffusie van groter molekules deur die gasheer is struktureel ondersoek. Laastens word ’n moontlike gasoordragmeganisme vir hierdie tipe poreuse (i.e. oënskynlik nie-poreuse) materiale gepostuleer. Hierdie bespreking word deur termodinamiese en kinetiese studies aangevul, sowel as molekulêre-meganika en statisties-meganiese studies.
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Alsayednoor, Jafar. "Modelling and characterisation of porous materials." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4808/.

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Porous materials possessing random microstructures exist in both organic (e.g. polymer foam, bone) and in-organic (e.g. silica aerogels) forms. Foams and aerogels are two such materials with numerous engineering and scientific applications such as light-weight cores in sandwich structures, packaging, impact and crash structures, filters, catalysts and thermal and electrical insulators. As such, design and manufacture using these materials is an important task that can benefit significantly from the use of computer aided engineering tools. With the increase in computational power, multi-scale modelling is fast becoming a powerful and increasingly relevant computational technique. Ultimately, the aim is to employ this technique to decrease the time and cost of experimental mechanical characterisation and also to optimise material microstructures. Both these goals can be achieved through the use of multi-scale modelling to predict the macro-mechanical behaviour of porous materials from their microstructural morphologies, and the constituent materials from which they are made. The aim of this work is to create novel software capable of generating realistic randomly micro-structured material models, for convenient import into commercial finite element software. An important aspect is computational efficiency and all techniques are developed paying close attention to the computation time required by the final finite element simulations. Existing methods are reviewed and where required, new techniques are devised. The research extensively employs the concept of the Representative Volume Element (RVE), and a Periodic Boundary Condition (PBC) is used in conjunction with the RVEs to obtain a volume-averaged mechanical response of the bulk material from the micro-scale. Numerical methods such as Voronoi, Voronoi-Laguerre and Diffusion Limited Cluster-Cluster Aggregation are all employed in generating the microstructures, and where necessary, enhanced in order to create a wide variety of realistic microstructural morphologies, including mono-disperse, polydisperse and isotropic microstructures (relevant to gas-expanded foam materials) as well as diffusion-based microstructures (relevant for aerogels). Methods of performing large strain simulations of foams microstructures, up to and beyond the onset strain of densification are developed and the dependence of mechanical response on the size of an RVE is considered. Both mechanical and morphological analysis of the RVEs is performed in order to investigate the relationship between mechanical response and internal microstructural morphology of the RVE. The majority of the investigation is limited to 2-d models though the work culminates in extending the methods to consider 3-d microstructures.
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Thompson, Benjamin Robert. "Hierarchically structured composites and porous materials." Thesis, University of Hull, 2017. http://hydra.hull.ac.uk/resources/hull:16570.

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This thesis develops a hydrogel bead templating technique for the preparation of hierarchically structured composites and porous materials. This method involves using slurries of hydrogel beads with different size distributions as templates. Mixing hydrogel beads with a scaffolding material and then allowing the scaffold to harden, followed by drying of the composite leaves pores in the place of the hydrogel beads. These pores reflect the size and shape of the templates used and the porosity reflects the volume percentage of hydrogel bead slurry mixed with the scaffolding material. A viscous trapping technique has been developed which utilises the viscosity of methylcellulose to stop sedimentation of the scaffold particles during network formation. Both of these methods are attractive due to being cheap, non-toxic and they use food grade materials which allows their use in a multitude of applications. Porous and hierarchically porous gypsum composites have been prepared using both hydrogel bead templating and viscous trapping techniques, or a combination of the two. The level of control over the final microstructure of the dried composites offered by these techniques allowed for a systematic investigation of their thermal and mechanical properties as a function of the pore size, porosity and hierarchical microstructure. It has been shown that the thermal conductivity decreases linearly with increasing porosity, however it was not dependent on the pore sizes that were investigated here. The mechanical properties, however, were significantly different. The porous composites produced with either small hydrogel beads (100 μm) or methylcellulose solution had approximately twice the compressional strength and Young’s modulus compared to the ones produced with large hydrogel beads (600 μm). The sound insulating properties of porous and hierarchically porous gypsum composites have also been investigated. With increasing porosity, the sound transmission loss decreases, as expected. At constant porosity, it is shown that the composites with large pores perform significantly better than the ones with small pores in the frequency range of 75-2000 Hz. At higher frequencies (>2400 Hz) the composites with smaller pores begin to perform better. The material’s microstructure has been studied in an attempt to explain this effect. The hydrogel templating technique can be used to prepare composite materials if the drying step is not performed. Hydrogel beads have been incorporated into a soap matrix. The dissolution rate of these composites as a function of hydrogel bead size and volume percentage of hydrogel beads incorporated within the soap matrix has been investigated. It has been shown that the dissolution rate can be increased by increasing the volume percentage of hydrogel beads used during composite preparation but it is independent on their size distribution. Finally, three methods of controlling the release rate of encapsulated species from these soap-hydrogel bead composites have been shown. The first method involved varying the size distribution of the hydrogel beads incorporated within the soap matrix. The second involved changing the concentration of the gelling polymer and the final method required co-encapsulation of an oppositely charged polyelectrolyte. A binary hydrogel system has been developed and its rheological and thermal properties have been investigated. It consists of agar and methylcellulose and shows significantly improved rheological properties at high temperatures compared to agar alone. The storage modulus of the two component hydrogel shows a maximum at 55 °C which was explained by a sol-gel phase transition of methylcellulose, evidence of which was seen during differential scanning calorimetry measurements. After exposure of this binary hydrogel to high temperatures above the melting point of agar alone (> 120 °C), it maintains its structure. This suggests it could be used for high temperature templating or structuring of food products. The melt-resistant binary hydrogel was used for the preparation of pancake-hydrogel composites using hydrogel bead templating. Mixing slurry of hydrogel beads of this composition with pancake batter, followed by preparation at high temperatures produced pancakes with hydrogel beads incorporated within. Bomb calorimetry measurements showed that the caloric density could be reduced by a controlled amount by varying the volume percentage of hydrogel beads used during preparation of the composites. This method could be applied to other food products such as biscuits, waffles and breakfast bars. Furthermore, there is scope for development of this method by the encapsulation of flavour enhancing or nutritionally beneficial ingredients within the hydrogel beads.
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Books on the topic "Porous materials"

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Moreno-Piraján, Juan Carlos, Liliana Giraldo-Gutierrez, and Fernando Gómez-Granados, eds. Porous Materials. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65991-2.

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Ishizaki, K., S. Komarneni, and M. Nanko. Porous Materials. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5811-8.

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Bruce, Duncan W., Dermot O'Hare, and Richard I. Walton, eds. Porous Materials. Chichester, UK: John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470711385.

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Bettotti, Paolo, ed. Submicron Porous Materials. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53035-2.

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Uthaman, Arya, Sabu Thomas, Tianduo Li, and Hanna Maria, eds. Advanced Functional Porous Materials. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-85397-6.

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Liu, Zhen. Multiphysics in Porous Materials. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93028-2.

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Su, Bao-Lian, Clément Sanchez, and Xiao-Yu Yang, eds. Hierarchically Structured Porous Materials. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527639588.

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Kowalski, Stefan Jan, ed. Drying of Porous Materials. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-5480-8.

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1945-, Kowalski Stefan J., ed. Drying of porous materials. Dordrecht: Springer, 2007.

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Jelfs, Kim, ed. Computer Simulation of Porous Materials. Cambridge: Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781839163319.

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Book chapters on the topic "Porous materials"

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Kärger, Jörg, Frank Stallmach, Rustem Valiullin, and Sergey Vasenkov. "Porous Materials." In NMR Imaging in Chemical Engineering, 231–50. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch3a.

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Reimert, R., E. H. Hardy, and A. von Garnier. "Porous Materials." In NMR Imaging in Chemical Engineering, 250–62. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch3b.

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Ren, Xiaohong, Siegfried Stapf, and Bernhard Blümich. "Porous Materials." In NMR Imaging in Chemical Engineering, 263–84. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch3c.

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Young, J. J., T. W. Bremner, M. D. A. Thomas, and B. J. Balcom. "Porous Materials." In NMR Imaging in Chemical Engineering, 285–303. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch3d.

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Beyea, S. D., D. O. Kuethe, A. McDowell, A. Caprihan, and S. J. Glass. "Porous Materials." In NMR Imaging in Chemical Engineering, 304–21. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch3e.

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Hirasaki, George J. "Porous Materials." In NMR Imaging in Chemical Engineering, 321–40. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch3f.

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Song, Yi-Qiao, Eric E. Sigmund, and Natalia V. Lisitza. "Porous Materials." In NMR Imaging in Chemical Engineering, 340–58. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch3g.

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Klinowski, Jacek. "Porous Materials." In Solid-State NMR Spectroscopy Principles and Applications, 437–82. Oxford, UK: Blackwell Science Ltd, 2007. http://dx.doi.org/10.1002/9780470999394.ch9.

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Hall, Christopher, and William D. Hoff. "Porous materials." In Water Transport in Brick, Stone and Concrete, 1–34. 3rd ed. London: CRC Press, 2021. http://dx.doi.org/10.1201/9780429352744-1.

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Morro, Angelo, and Claudio Giorgi. "Porous Materials." In Mathematical Modelling of Continuum Physics, 659–80. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-20814-0_11.

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Conference papers on the topic "Porous materials"

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Alexey, Sinitsyn, and Spivak Yulia. "Alumina-based porous materials." In 2016 IEEE NW Russia Young Researchers in Electrical and Electronic Engineering Conference (EIConRusNW). IEEE, 2016. http://dx.doi.org/10.1109/eiconrusnw.2016.7448124.

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Harun, Z., and T. C. Ong. "Material parameters sensitivity in modeling drying of porous materials." In 2013 International Conference on Advanced Materials and Information Technology Processing. Southampton, UK: WIT Press, 2014. http://dx.doi.org/10.2495/amitp130111.

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Boukpeti, N., and J. F. Thimus. "Freezing of Fractured Porous Materials." In 13th International Conference on Cold Regions Engineering. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40836(210)35.

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Renero, C., and F. E. Prieto. "Shock Hugoniot for porous materials." In Proceedings of the conference of the American Physical Society topical group on shock compression of condensed matter. AIP, 1996. http://dx.doi.org/10.1063/1.50859.

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Saini, Rakesh, Matthew Kenny, and Dominik P. J. Barz. "Electroosmotic Flow Through Porous Materials." In ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icnmm2014-21173.

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Electroosmotic flow can be employed in many microfluidic systems. Especially, highly porous materials are suitable since they generate significant flow rates and pressures. In the current research, we employ electroosmosis experiments using a relatively simple and cost-effective set-up including different sets of sintered packed beds of borosilicate micro spheres having a wider range of porosities. Various experiments are performed with varying applied electric field, and packed bed porosity. The flow rates are measured by tracking the air/liquid interface in a capillary which is connected to the packed bed. A mathematical model of the setup reveals the influence of the capillary flow on the flow rate of the electroosmotic flow.
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Leventis, Nicholas. "Mechanically Strong Lightweight Porous Materials f..." In 56th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.iac-05-c2.7.09.

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Huang, Yun, Sofia G. Mogilevskaya, Steven L. Crouch, Glaucio H. Paulino, Marek-Jerzy Pindera, Robert H. Dodds, Fernando A. Rochinha, Eshan Dave, and Linfeng Chen. "Computational Modeling of Viscoelastic Porous Materials." In MULTISCALE AND FUNCTIONALLY GRADED MATERIALS 2006. AIP, 2008. http://dx.doi.org/10.1063/1.2896860.

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Telengator, Alexander, Forman Williams, and Stephen Margolis. "Ignition analyses of porous energetic materials." In 37th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-861.

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Ciobanu, Petru, Muhammed Hasan Aslan, Ahmet Yayuz Oral, Mehmet Özer, and Süleyman Hikmet Çaglar. "ABOUT MECHANICAL STRENGTH OF POROUS MATERIALS." In INTERNATIONAL CONGRESS ON ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE. AIP, 2011. http://dx.doi.org/10.1063/1.3663162.

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Miryuk, Olga, and Tatiana Grabovetsv. "Magnesia composite materials with porous aggregate." In VII INTERNATIONAL CONFERENCE “SAFETY PROBLEMS OF CIVIL ENGINEERING CRITICAL INFRASTRUCTURES” (SPCECI2021). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0121029.

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Reports on the topic "Porous materials"

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Johra, Hicham. Air permeameter for porous building materials: Aalborg University prototype 2023. Department of the Built Environment, 2023. http://dx.doi.org/10.54337/aau545266824.

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The aim of this lecture note is to present the first prototype of an air permeameter for porous building material built at Aalborg University, Department of the Built Environment. This air permeameter setup is primarily intended for porous insulation materials but could be used for all types of materials fitting the sample frame. This lecture note also provides guidelines to operate this air permeameter and perform a state-of-the-art measurement of the effective air permeability.
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Bayu Aji, L., I. Winter, T. Fears, and S. Kucheyev. Sculpting Non-Machinable Porous Materials. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1668504.

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Cummings, Laura. Porous Polymeric Materials FY24 PDRD Final Report. Office of Scientific and Technical Information (OSTI), October 2023. http://dx.doi.org/10.2172/2007151.

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Ho, Hoi Chun, Ngoc A. Nguyen, Kelly M. Meek, Amit K. Naskar, David M. Alonso, Sikander H. Hakim, and Jeffrey J. Fornero. γ-Valerolactone-Extracted Lignin to Porous Carbon Materials. Office of Scientific and Technical Information (OSTI), May 2018. http://dx.doi.org/10.2172/1470859.

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Herbold, E., M. Homel, and R. Managan. On Artificial Viscosity for Shocks in Porous Materials. Office of Scientific and Technical Information (OSTI), September 2017. http://dx.doi.org/10.2172/1404851.

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Moon, Chul, Jason E. Heath, and Scott A. Mitchell. Statistical Inference for Porous Materials using Persistent Homology. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1414662.

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Lee, Matthew Nicholson, Kyle James Cluff, and Matthew Douglass Crall. Advanced Manufacturing of Porous and Composite Silicone Materials. Office of Scientific and Technical Information (OSTI), May 2020. http://dx.doi.org/10.2172/1635503.

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Fuller, E. L. Jr. Characterization of porous carbon fibers and related materials. Office of Scientific and Technical Information (OSTI), July 1996. http://dx.doi.org/10.2172/273794.

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Fuller, Jr, E. L. Characterization of Porous Carbon Fibers and Related Materials. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/814269.

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Kanouff, Michael P., Daniel E. Dedrick, and Tyler Voskuilen. System level permeability modeling of porous hydrogen storage materials. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/984141.

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