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Relevant bibliographies by topics / Porous PDMS

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Academic literature on the topic 'Porous PDMS'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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Journal articles on the topic "Porous PDMS"

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Jang, Yunseok, Seung-Hyun Lee, Youn-Ki Lee, et al. "Fabrication of Highly Sensitive Porous Polydimethylsiloxane Pressure Sensor Through Control of Rheological Properties." Polymers 16, no. 21 (2024): 3075. http://dx.doi.org/10.3390/polym16213075.

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In order to enhance the sensitivity of elastomers, pores were integrated into their structure. These pores facilitate the adjustment of thickness in response to external pressure variations, thereby improving the sensitivity of pressure sensors. Pores were introduced by emulsifying immiscible polydimethylsiloxane (PDMS) and water with a surfactant. By controlling the water content in the PDMS and water emulsion, we controlled the size, density, uniformity, and spatial distribution (2D or 3D) of the pores within the PDMS matrix. The presence of these pores significantly improved the sensitivity

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Baek, Dong-Hyun, Hachul Jung, Jeong Hun Kim, et al. "Effect of Viscosity on the Formation of Porous Polydimethylsiloxane for Wearable Device Applications." Molecules 26, no. 5 (2021): 1471. http://dx.doi.org/10.3390/molecules26051471.

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Medical devices, which enhance the quality of life, have experienced a gradual increase in demand. Various research groups have attempted to incorporate soft materials such as skin into wearable devices. We developed a stretchable substrate with high elasticity by forming a porous structure on polydimethylsiloxane (PDMS). To optimize the porous structure, we propose a manufacturing process that utilizes a high-pressure steam with different viscosities (400, 800, 2100, and 3000 cP) of an uncured PDMS solution. The proposed method simplifies the manufacturing of porous structures and is cost-eff

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Wu, Bang, Weiguang Wu, Rui Ma, et al. "High-Sensitivity and Wide-Range Flexible Ionic Piezocapacitive Pressure Sensors with Porous Hemisphere Array Electrodes." Sensors 24, no. 2 (2024): 366. http://dx.doi.org/10.3390/s24020366.

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The development of high-performance flexible pressure sensors with porous hierarchical microstructures is limited by the complex and time-consuming preparation processes of porous hierarchical microstructures. In this study, a simple modified heat curing process was first proposed to achieve one-step preparation of porous hemispherical microstructures on a polydimethylsiloxane (PDMS) substrate. In this process, a laser-prepared template was used to form surface microstructures on PDMS film. Meanwhile, the thermal decomposition of glucose monohydrate additive during heat curing of PDMS led to t

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Jang, Yeongseok, Hyojae Kim, Jinmu Jung, and Jonghyun Oh. "Controlled Thin Polydimethylsiloxane Membrane with Small and Large Micropores for Enhanced Attachment and Detachment of the Cell Sheet." Membranes 12, no. 7 (2022): 688. http://dx.doi.org/10.3390/membranes12070688.

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Polydimethylsiloxane (PDMS) membranes can allow the precise control of well-defined micropore generation. A PDMS solution was mixed with a Rushton impeller to generate a large number of microbubbles. The mixed solution was spin-coated on silicon wafer to control the membrane thickness. The microbubbles caused the generation of a large number of small and large micropores in the PDMS membranes with decreased membrane thickness. The morphology of the thinner porous PDMS membrane induced higher values of roughness, Young’s modulus, contact angle, and air permeability. At day 7, the viability of c

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Bagdasarian, Isabella A., Thamidul Islam Tonmoy, B. Hyle Park, and Joshua T. Morgan. "In vitro formation and extended culture of highly metabolically active and contractile tissues." PLOS ONE 18, no. 11 (2023): e0293609. http://dx.doi.org/10.1371/journal.pone.0293609.

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3D cell culture models have gained popularity in recent years as an alternative to animal and 2D cell culture models for pharmaceutical testing and disease modeling. Polydimethylsiloxane (PDMS) is a cost-effective and accessible molding material for 3D cultures; however, routine PDMS molding may not be appropriate for extended culture of contractile and metabolically active tissues. Failures can include loss of culture adhesion to the PDMS mold and limited culture surfaces for nutrient and waste diffusion. In this study, we evaluated PDMS molding materials and surface treatments for highly con

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Eluu, S. C., A. O. Oko, K. Eluu, et al. "Enhancing biomedical applications: Modifying porous poly-di-methyl-siloxane (PDMS) structures with magnetite nanoparticles (MNPs) to improve interaction with normal human breast cells (MCF10A cells)." Nigerian Journal of Biotechnology 40, no. 2 (2024): 69–76. http://dx.doi.org/10.4314/njb.v40i2.8.

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The phenomenon of cell-biomaterial interaction is responsible for adherent cells' adhesion to the biomaterial surface and the corresponding cell activities. The study aimed to enhance biocompatibility and versatility by modification of porous PDMS structures with MNPs for their safe interaction with normal human breast cells, MCF10A cell line. Preparation of the MNP-modified porous PDMS substrate was carried out by mixing a silicone elastomer base with a curing agent at a specific ratio, typically in a 10:1, followed by modification with MNP and the creation of pores of different dimensions. T

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JUCHNIEWICZ, M., D. STADNIK, K. BIESIADA, et al. "Porous crosslinked PDMS-microchannels coatings." Sensors and Actuators B: Chemical 126, no. 1 (2007): 68–72. http://dx.doi.org/10.1016/j.snb.2006.10.041.

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King, M. G., A. J. Baragwanath, M. C. Rosamond, D. Wood, and A. J. Gallant. "Porous PDMS force sensitive resistors." Procedia Chemistry 1, no. 1 (2009): 568–71. http://dx.doi.org/10.1016/j.proche.2009.07.142.

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Kwak, Yeunjun, Yunsung Kang, Wonkeun Park, Eunhwan Jo, and Jongbaeg Kim. "Fabrication of fine-pored polydimethylsiloxane using an isopropyl alcohol and water mixture for adjustable mechanical, optical, and thermal properties." RSC Advances 11, no. 29 (2021): 18061–67. http://dx.doi.org/10.1039/d1ra02466c.

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A fabrication method for obtaining fine-pored PDMS is presented. Low-cost, volatile, and easily accessible IPA is used as a co-solvent in water and PDMS emulsions, allowing porous PDMS with adjustable mechanical, optical and thermal properties.

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Zhang, Shuming, Xidi Sun, Xin Guo, et al. "A Wide-Range-Response Piezoresistive–Capacitive Dual-Sensing Breathable Sensor with Spherical-Shell Network of MWCNTs for Motion Detection and Language Assistance." Nanomaterials 13, no. 5 (2023): 843. http://dx.doi.org/10.3390/nano13050843.

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It is still a challenge for flexible electronic materials to realize integrated strain sensors with a large linear working range, high sensitivity, good response durability, good skin affinity and good air permeability. In this paper, we present a simple and scalable porous piezoresistive/capacitive dual-mode sensor with a porous structure in polydimethylsiloxane (PDMS) and with multi-walled carbon nanotubes (MWCNTs) embedded on its internal surface to form a three-dimensional spherical-shell-structured conductive network. Thanks to the unique spherical-shell conductive network of MWCNTs and t

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Dissertations / Theses on the topic "Porous PDMS"

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Balubaid, Eyad Khalid M. "Preparation and Characterization of Porous PDMS for Printed Electronics." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1578073290398846.

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Shademani, Ali. "Design, fabrication, and characterization of a magnetic porous pdms as an on-demand drug delivery device." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58940.

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We introduce a novel, on-demand drug delivery device based on a biocompatible magnetic sponge. The sponge is made of a porous polydimethylsiloxane (PDMS) mixed with carbonyl iron (CI) particles. The sponge is deformed under a magnetic field and consequently leads to releasing its contents. As a proof of concept study, three different CI/PDMS wt% ratios of 50%, 100%, and 150% were selected where, the 100% showed the most deformation under various magnetic fields. Although this sponge can solely be used as a potential drug delivery agent, a separate reservoir has been fabricated to protect the s

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Liu, Yawen. "Research of Two Types of Slippery Surfaces: Slippery Polydimethylsiloxane Elastomers and Polyelectrolyte Multilayers Slippery Surfaces." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1530877456582558.

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Morshed, Mahbub. "Study of the separation by organic solvent nanofiltration of diluted solutes using commercial, dense and porous membranes and their derivatives by deposition of polyelectrolyte nanolayers." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0089/document.

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L’objectif de cette étude était d’améliorer les performances de séparation OSN de membranes commerciales en vue d’applications en métathèse dans laquelle des catalyseurs hautement dilués sont utilisés. Dans ce travail, des membranes polymères commerciales ont d'abord été étudiée pour caractériser leurs performances dans des milieux organiques en utilisant des mélanges binaires très dilués solute-solvant. Sur la base d'une revue de la littérature, il a été montré que la membrane PERVAP4060, dont le PDMS est la couche active dense était un candidat prometteur pour la nanofiltration milieu organi

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Morshed, Mahbub. "Study of the separation by organic solvent nanofiltration of diluted solutes using commercial, dense and porous membranes and their derivatives by deposition of polyelectrolyte nanolayers." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0089.

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L’objectif de cette étude était d’améliorer les performances de séparation OSN de membranes commerciales en vue d’applications en métathèse dans laquelle des catalyseurs hautement dilués sont utilisés. Dans ce travail, des membranes polymères commerciales ont d'abord été étudiée pour caractériser leurs performances dans des milieux organiques en utilisant des mélanges binaires très dilués solute-solvant. Sur la base d'une revue de la littérature, il a été montré que la membrane PERVAP4060, dont le PDMS est la couche active dense était un candidat prometteur pour la nanofiltration milieu organi

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Giuliano, Federico. "Membrane di grafene porose tridimensionali: crescita mediante CVD e proprietà elettromeccaniche." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13529/.

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Le schiume di grafene, network tridimensionali di fogli di grafene interconnessi caratterizzati dall'elevata porosità, cresciute tramite Deposizione Chimica da Fase Vapore (CVD) negli ultimi anni sono state oggetto di intenso studio a causa della loro elevata superficie efficace, delle grandi proprietà conduttive e della buona integrità strutturale. In questa tesi vengono riportati i risultati sperimentali di misure meccaniche ed elettromeccaniche, ovvero misure elettriche durante stress meccanici, eseguite su schiume di grafene cresciute tramite CVD e infiltrate con il polimero PDMS. In par

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Chave, Florent. "Méthodes hybrides d'ordre élevé pour les problèmes d'interface." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS015/document.

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Le but de cette thèse est de développer et d’analyser les méthodes Hybrides d’Ordre Élevé (HHO: Hybrid High-Order, en anglais) pour des problèmes d’interfaces. Nous nous intéressons à deux types d’interfaces (i) les interfaces diffuses, et (ii) les interfaces traitées comme frontières internes du domaine computationnel. La première moitié de ce manuscrit est consacrée aux interfaces diffuses, et plus précisément aux célèbres équations de Cahn–Hilliard qui modélisent le processus de séparation de phase par lequel les deux composants d’un fluide binaire se séparent pour former des domaines purs

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Saad, Bilal. "Modélisation et simulation numérique d'écoulements multi-composants en milieu poreux." Phd thesis, Ecole centrale de nantes - ECN, 2011. http://tel.archives-ouvertes.fr/tel-00649033.

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Cette thèse concerne la modélisation, l'étude mathématique et la simulation numérique des problèmes d'écoulements diphasique (liquide et gaz) multi-composant (principalement eau et hydrogène) en milieu poreux. Le domaine d'application typique concerne le stockage des déchets radioactifs de moyenne et haute activité à vie longue. Ce type d'étude est motivé, entre autre, par une augmentation de la pression au sein du stockage due à un dégagement d'hydrogène au niveau des colis, pouvant ainsi fracturer la roche environnante et donc faciliter la migration des radionucléides. En supposant que le tr

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Hutridurga, Ramaiah Harsha. "Homogénéisation et dispersion pour des écoulements complexes en milieu poreux et applications." Phd thesis, Palaiseau, Ecole polytechnique, 2013. https://theses.hal.science/index.php?halsid=b5dg7470uitq63omogbminqdg3&view_this_doc=pastel-00866253&version=1.

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Ce travail est une contribution pour mieux comprendre le transport de solutés dans un milieu poreux. Ce phénomène se rencontre dans de nombreux domaines: transport de contaminants dans les eaux souterraines, séquestration du CO2, stockage souterrain des déchets nucléaires, simulations de réservoirs pétroliers. On obtient la dispersion effective de Taylor en tenant compte de la convection, de la diffusion, de la géométrie du milieu poreux et des réactions chimiques. Le but de la théorie d'homogénéisation est, à partir d'équations microscopiques, de dériver un modèle effectif à l'échelle macrosc

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Hutridurga, Ramaiah Harsha. "HOMOGÉNÉISATION ET DISPERSION POUR DES ÉCOULEMENTS COMPLEXES EN MILIEU POREUX ET APPLICATIONS." Phd thesis, Ecole Polytechnique X, 2013. http://pastel.archives-ouvertes.fr/pastel-00866253.

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Ce travail est une contribution pour mieux comprendre le transport de solutés dans un milieu poreux. Ce phénomène se rencontre dans de nombreux domaines: transport de contaminants dans les eaux souterraines, séquestration du CO2, stockage souterrain des déchets nucléaires, simulations de réservoirs pétroliers. On obtient la dispersion effective de Taylor en tenant compte de la convection, de la diffusion, de la géométrie du milieu poreux et des réactions chimiques. Le but de la théorie d'homogénéisation est, à partir d'équations microscopiques, de dériver un modèle effectif à l'échelle macrosc

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Book chapters on the topic "Porous PDMS"

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Shademani, Ali, Hongbin Zhang, and Mu Chiao. "Design, Fabrication and Characterization of Magnetic Porous PDMS as an On-Demand Drug Delivery Device." In Clinical Applications of Magnetic Nanoparticles. CRC Press, 2018. http://dx.doi.org/10.1201/9781315168258-20.

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Liu, Zhen. "Numerical Solution of PDEs." In Multiphysics in Porous Materials. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93028-2_10.

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Sun, Shuyu, Béatrice Rivière, and Mary F. Wheeler. "A Combined Mixed Finite Element and Discontinuous Galerkin Method for Miscible Displacement Problem in Porous Media." In Recent Progress in Computational and Applied PDES. Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0113-8_23.

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Henriques Ferreira, Sofia, Ana Rovisco, Andreia dos Santos, et al. "Porous ZnO Nanostructures Synthesized by Microwave Hydrothermal Method for Energy Harvesting Applications." In Nanopores [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97060.

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The ever-growing global market for smart wearable technologies and Internet of Things (IoT) has increased the demand for sustainable and multifunctional nanomaterials synthesized by low-cost and energy-efficient processing technologies. Zinc oxide (ZnO) is a key material for this purpose due to the variety of facile methods that exist to produced ZnO nanostructures with tailored sizes, morphologies, and optical and electrical properties. In particular, ZnO nanostructures with a porous structure are advantageous over other morphologies for many applications because of their high specific surface area. In this chapter, a literature review on the latest progress regarding the synthesis and applications of ZnO with a porous morphology will be provided, with special focus on the synthesis by microwave hydrothermal method of these nanomaterials and their potential for application in energy harvesting devices. Nanogenerators of a composite made by polydimethylsiloxane (PDMS) and porous ZnO nanostructures were explored and optimized, with an output voltage of (4.5 ± 0.3) V being achieved for the best conditions. The daily life applicability of these devices was demonstrated by lighting up a commercial LED, by manually stimulating the nanogenerator directly connected to the LED.

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Mark, James E., Dale W. Schaefer, and Gui Lin. "Composites." In The Polysiloxanes. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780195181739.003.0011.

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A relatively new area that involves silicon-containing materials is the synthesis of “ultrastructure” materials (i.e., materials in which structure can be controlled at the level of 100 &angst;). An example is the “sol-gel” hydrolysis of alkoxysilanes (organosilicates) to give silica, SiO2. The reaction is complicated, involving polymerization and branching, but the overall reaction may be written . . . Si(OR4 + 2H2O → SiO2 + 4ROH (9.1) . . . where the Si(OR)4 organometallic species is typically tetraethoxysilane such as tetraethylorthosilicate (TEOS, with R being C2H5). In this application, the precursor compound is hydrolyzed and then condensed to yield branched polymers. Eventually a continuous swollen gel is formed. The gel is dried at moderately low temperatures to remove volatile species, and then it is fired into a porous ceramic object that can then be densified and machined into a final ceramic part. The production of ceramics by this novel route triggered interest in the ceramics community because of advantages over the conventional powder-processing approach to ceramics. Advantages include (i) the higher purity of the starting materials, (ii) the relatively low temperatures required, (iii) the possibility of controlling the ultrastructure to reduce the microscopic flaws that lead to failure, (iv) the ease with which ceramic coatings can be formed, and (v) the ease with which ceramic alloys can be prepared (e.g., by hydrolyzing solutions of both silicates and titanates). The sol-gel approach has been used to form ceramic-like phases in a variety of polymers. Poly(dimethylsiloxane) (PDMS) is the most popular. PDMS is relatively weak and stands to benefit most from reinforcement. PDMS is easily absorbs the precursor materials generally used in the solgel process. Nearly monodisperse silica microparticles can be obtained using siloxane elastomer mixtures. In some cases, the PDMS has been part of a copolymer, with ureas, imides, amideimides, and dianilines. In other approaches, the particle surface is modified, for example, with a polysiloxane. Siloxane/silica nanocomposites have also been used as “culture-stone-protective materials.” Sol-gel hydrolysis and condensation can be carried out within a polymeric matrix to generate particles of the ceramic material, typically with an average diameter of a few hundred angstroms.

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Mark, James E., Harry R. Allcock, and Robert West. "Inorganic-Organic Hybrid Composites." In Inorganic Polymers. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195131192.003.0012.

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A relatively new area that involves silicon-containing materials is the synthesis of “ultrastructure” materials, that is materials in which structure can be controlled at the level of around 100 Å. An example of such a synthesis is the “sol-gel” hydrolysis of alkoxysilanes (organosilicates) to give silica, SiO2. The reaction is complicated, involving polymerization and branching, but a typical overall reaction may be written . . . Si(OR)4 + 2H2O → SiO2 + 4ROH (1) . . . where the Si(OR)4 organometallic species is typically tetraethoxysilane (tetraethylorthosilicate) (TEOS, with R being C2H5). In this application, the precursor compound is hydrolyzed and then condensed to polymeric chains, the chains become more and more branched, and finally a continuous highly swollen gel is formed. It is first dried at moderately low temperatures to remove volatile species, and then is fired into a porous ceramic object. It can then be densified, if desired, and machined into a final ceramic part. Not surprisingly, the production of ceramics by this novel route has generated a great deal of interest. Its advantages, over the usual “heat-and-beat” (e.g., sintering) approach to ceramics, is (i) the higher purity of the starting materials, (ii) the relatively low temperatures required, (iii) the possibility of controlling the ultrastructure of the ceramic (to reduce the number of microscopic flaws that lead to brittleness), (iv) the ease with which ceramic coatings can be formed, and (v) the ease with which ceramic alloys can be prepared (for example, by hydrolyzing solutions of both silicates and titanates). This approach has been used to form ceramic-like phases in a wide variety of polymers. The one which has been studied the most in this regard is poly(dimethylsiloxane) (PDMS), the semi-inorganic polymer featured extensively in Chapter 4. This is due to PDMS being in the class of relatively weak elastomers most in need of reinforcement, and being capable of easily absorbing the precursor materials generally used in the sol-gel process. The same hydrolyses can be carried out within a polymeric matrix to generate particles of the ceramic material, typically with an average diameter of a few hundred angstroms. The polymer typically has end groups, such as hydroxyls, that can participate in the hydrolysis-condensation reactions.

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Meister Oliver, Rahnema Kaveh, and Bader Michael. "A Software Concept for Cache-Efficient Simulation on Dynamically Adaptive Structured Triangular Grids." In Advances in Parallel Computing. IOS Press, 2012. https://doi.org/10.3233/978-1-61499-041-3-251.

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We present a software concept for element-oriented numerical solvers for PDEs on dynamically adaptive grids. The respective layer concept provides volume kernels to implement layer operators, which work on a traversal layer that implements cache-efficient traversals on structured adaptive triangular grids (provided by a grid layer underneath). We present a simple heat propagation problem and a coupled solver for flows in porous media as examples, and study the achieved single-core and memory performance. First results are also given for current work on parallelization of the approach.

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Sahu, Digbash, and Hiya Saharia. "Numerical Study of Stratification and Radiation in MHD Fe3O4-Cu-Kerosene/Engine Oil Flow on Cylinder." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2025. https://doi.org/10.4018/979-8-3693-8532-6.ch002.

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This study investigates the effects of stratification, radiation, and MHD flow on the behavior of a ternary hybrid nanofluid (Fe3O4-Cu-kerosene/engine oil) along a stretching-shrinking cylinder within a porous medium. Using conservation laws and similarity transformations, the governing PDEs are transformed into ODEs and solved with MATLAB's bvp4c function, revealing key thermal and dynamic characteristics. Findings show that ternary hybrid nanofluids, with enhanced thermal conductivity, outperform conventional nanofluids. Both temperature and velocity decrease under heat stratification, while heat transfer rates significantly improve in hybrid nanofluids. These insights support applications in environmental monitoring technologies, such as pollution control, thermal sensors, chemical detection, and water treatment. Understanding the flow of ternary hybrid nanofluids under these factors aids in enhancing global health technologies through improved performance and efficiency.

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Cavosie, Aaron J., and Luigi Folco. "Shock-twinned zircon in ejecta from the 45-m-diameter Kamil crater in southern Egypt." In Large Meteorite Impacts and Planetary Evolution VI. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.2550(17).

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ABSTRACT With an age of less than ~5000 yr and a diameter of 45 m, Kamil crater in Egypt is one of the youngest and smallest terrestrial impact craters known to date. Abundant evidence of shock-deformed sandstone has been reported from Kamil crater, including shatter cones, vesicular impact glass, high-pressure polymorphs of silica and car bon, planar deformation features (PDFs) and planar fractures (PFs) in quartz, dissociated zircon, melt veins, and intergranular melt, giving rise to a range of estimated shock pressures from ~20 to ~60 GPa. Here, we investigated shocked zircon from Kamil crater through characterization of microstructures in a centimeter-sized clast of shocked nonporous sandstone ejecta, previously described as containing quartz grains with PDFs and PFs, coesite, stishovite, diamond, and lechatelierite. Orientation analysis by electron backscatter diffraction (EBSD) showed that the quartz arenite consists of damaged detrital quartz grains surrounded by a matrix of either comminuted quartz or intergranular melt. Individual quartz grains are pervasively fractured (abundant PFs and PDFs); apparent isotropic crushing resulted in uniformly and highly dispersed orientation clusters on pole figures. Zircon grains are not abundant; however, four of 19 grains analyzed by EBSD contained {112} deformation twin lamellae, with individual lamellae ranging in length from 1 to 2 µm. Lengths of twin lamellae in Kamil zircon grains are anomalously short compared to those report-ed in shocked zircon from other impact structures, where individual lamellae are tens of micrometers long. Previous empirical studies have suggested that {112} twin lamellae in zircon form at ~20 GPa in non-porous target rocks, a finding supported by their coexistence, in some impactites, with high-pressure phases such as reidite. The only available experimental constraint, by diamond anvil cell, found {112} twins in zircon powder quenched at 20 GPa. The presence of coesite, stishovite, lechatelierite, and shocked quartz with PDFs in the studied sample is consistent with empirically derived pressure estimates of ~20 GPa for {112} twin formation in zircon in the ejecta sample from Kamil crater. Kamil thus represents the smallest and youngest impact structure where shock-twinned zircon has been reported. Given the apparent efficiency of {112} twin formation (21% of grains), shock-twinned zircon is here shown to provide a robust and readily identifiable record of shock deformation in a relatively common mineral at one of the smallest known terrestrial impact craters.

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Sridhar, W., D. Srinivasa Rao, G. Dharmaiah, and V. Sujatha. "ALIGNED MAGNETIC FIELD-ENHANCED MHD MIXED CONVECTION AND HEAT TRANSFER ON A MOVING INCLINED POROUS SURFACE." In Futuristic Trends in Contemporary Mathematics & Applications Volume 3 Book 3. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bfcm3p4ch1.

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The primary objective of this study is to investigate the combined effects of magnetohydrodynamic (MHD) mixed convection flow along with heat transfer on an inclined permeable sheet in motion, subjected to an aligned magnetic field. To attain this goal, precise solutions for the partial differential equations (PDEs) are derived using perturbation techniques. The research explores the impact of several factors, including radiation thermo, chemical reaction, Hall current and the aligned magnetic field. Notably, it is noted that higher values of the Schmidt number (Sc) and the parameter γ lead to a reduction in fluid concentration. Conversely, elevated values of parameters ϕ, Prandtl number (Pr), and the mixed convection parameter (F) result in a decrease in temperature. The velocity of the fluid is found to increase with higher values of the Grashof numbers (Gr), Görtler numbers (Gc), thermal buoyancy parameter (α), mixed convection parameter (F), and the permeability parameter (K). On the contrary, the velocity decreases when parameters of non-dimentional such as the Hartmann number (M), Sc, Pr, ξ, power-law index (m), and ϕ are increased. Further analysis reveals that the Sherwood number experiences a decline with increasing Sc and γ values. Conversely, the Nusselt number rises as the parameters F, ϕ, and Pr increase. Additionally, the study shows that an increase in the permeability parameter (K), Gr, and Gc results in a higher skin-friction coefficient, whereas an increase in parameters M, α, F, Sc, m, and ξ leads to a decrease in the skin-friction coefficient. To validate the findings, graphs are generated and compared with the calculated results. In summary, the study sheds light on the interplay between mixed convection, heat transfer, MHD effects, and aligned magnetic fields in a porous medium, providing valuable insights into the intricate fluid dynamics and thermal behavior.

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Conference papers on the topic "Porous PDMS"

1

Maia, Renata, Paulo Sousa, Vânia Pinto, Rui Lima, Graça Minas, and Raquel O. Rodrigues. "Development and Characterization of Porous PDMS Microneedles." In 2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG). IEEE, 2023. http://dx.doi.org/10.1109/enbeng58165.2023.10175361.

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2

Zhou, Lyu, Jacob Rada, Huafan Zhang, Haomin Song, Boon S. Ooi, and Qiaoqiang Gan. "Sustainable porous Polydimethylsiloxane for efficient radiative cooling." In CLEO: Applications and Technology. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.jw3a.10.

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We reported a porous PDMS fabricated by a sustainable process. The obtained porous PDMS strong visible scattering and thermal emission, resulting in an efficient temperature reduction of 4.6 °C under direct solar irradiation.

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3

Zhang, Haipeng, Tomer Palmon, Seunghee Kim, and Sangjin Ryu. "Fabrication of a Microchannel Device With a Three-Dimensional Pore Network Using a Sacrificial Sugar Template." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20356.

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Abstract Porous media compressed air energy storage (PM-CAES) is an emerging technology that stores compressed air in an underground aquifer during the off-peak periods, to mitigate the mismatch between energy supplies and demands. Thus, PM-CAES involves repeated two-phase fluid flow in porous media, and ensuring the success of PM-CAES requires a better understanding of repetitive two-phase fluid flow through porous media. For this purpose, we previously developed microfluidic channels that retain a two-dimensional (2D) pore network. Because it was found that the geometry of the pore structure

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4

Abshirini, Mohammad, M. Cengiz Altan, Yingtao Liu, Mrinal C. Saha, Laura Cummings, and Thomas Robison. "Manufacturing of Porous Polydimethylsiloxane (PDMS) Plates Using Solvent Evaporation Induced Phase Separation Technique." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24062.

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Abstract This paper presents the fabrication and characterization of porous polydimethylsiloxane (PDMS) plates. The framework for obtaining porous PDMS is based on the solvent evaporation induced phase separation technique. A mixture of PDMS, water, and tetrahydrofuran (THF) with different concentrations is prepared. The three phases are stirred to reach a highly stable and viscous solution. The THF and water phases are evaporated during a curing cycle by applying a stepping heat treatment. The porous PDMS sheets with a wide range of pore sizes are fabricated by controlling the ratio of water

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5

Abshirini, Mohammad, M. Cengiz Altan, Yingtao Liu, and Mrinal C. Saha. "Investigation of Pore Size Distribution and Mechanical Properties of Porous Polydimethylsiloxane (PDMS) Structures Using Solvent Evaporation Technique." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-70816.

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Abstract This paper reports a fast and straightforward method for controlling the pore size distribution and mechanical properties of porous polydimethylsiloxane (PDMS) structures. The solvent evaporation-induced phase separation is implemented for the fabrication of absorbent PDMS sheets. The ternary polymer solution containing PDMS, water (nonsolvent), and three different solvents are prepared. Tetrahydrofuran, Heptane, and Toluene are the solvents explored in this study. The stepping heat treatment is applied to the sample to control the solvent evaporation and trigger the phase separation.

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6

Kang, Yoon-Tae, Joseph Marvar, Nna-Emeka Onukwugha, et al. "Fast and Cost-Effective Isolation of Circulating Exosomes Using Porous PDMS-Based Microsystem(Porous Exochip)." In 2022 IEEE 35th International Conference on Micro Electro Mechanical Systems Conference (MEMS). IEEE, 2022. http://dx.doi.org/10.1109/mems51670.2022.9699531.

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7

Chang, Ching, Guan-Teng Lin, Chung-Ping Huang, and Chien-Chung Lin. "Colloidal Quantum Dot LEDs Package with Porous Microcarrier." In CLEO: Science and Innovations. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_si.2023.stu4n.3.

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The porous structured microcarrier powders were mixed with CQD/PDMS packages to improve the dispersion of CQD particles. When the traditional package suffers seriously in efficiency at high CQD loading, the microcarrier ones sustain its performance and win out.

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8

Ganapathy Subramani, Balasubramanian, and Ponnambalam Selvaganapathy. "Surface Micromachined PDMS Microchannels." In ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2007. http://dx.doi.org/10.1115/icnmm2007-30169.

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A new surface micromachining technique for Poly dimethylsiloxane (PDMS) microchannels has been developed to address the leakage problem affecting traditional PDMS microchannel process with embedded tall structures or sudden topographical transitions. Bulk micromachined PDMS cannot be conformally bonded with the surfaces having tall topological features such as thick film electrodes, porous reactor beds and other structural features. Surface micromachining technique with PDMS as structural material and photoresist as a sacrificial material allows the creation of PDMS microchannels on substrates

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9

Hakizimana, Emmanuel, Mrinal Saha, Laura Cummings, and Thomas Robison. "Study of Surfactants on Porous PDMS/Silica Structures using Emulsion Templating." In PolyMAC, KCNSC, June 22, 2022, KCNSC. US DOE, 2022. http://dx.doi.org/10.2172/1872926.

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10

Grigorov, Emil, Boris Kirov, Jordan A. Denev, and Vassil Galabov. "Novel Approach for Passive Mixing in Microfluidics Utilizing Porous PDMS Sponge." In 2023 International Scientific Conference on Computer Science (COMSCI). IEEE, 2023. http://dx.doi.org/10.1109/comsci59259.2023.10315880.

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