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Dissertations / Theses on the topic 'Swelling of hydrogels'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Yang, Ting. "Mechanical and swelling properties of hydrogels." Doctoral thesis, KTH, Ytbehandlingsteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105539.

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Hydrogels have been used as one of the novel soft materials in many biomedical applications such as drug delivery and tissue engineering for recent decades. In the main part of this work, bi-functional poly(ethylene glycol) (PEG) precursors with either thiols (PEG-SH) or allyls (PEG-Al) , covering molecular weights from 3 kDa to 8 kDa were synthesized and thoroughly characterized by 1H NMR, 13C NMR, FT-Raman and MALDI-TOF techniques. By combining PEG precursors with complementary trifunctional crosslinkers, a library of well-defined single-network hydrogels was efficiently constructed via the

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2

Vasheghani-Farahani, Ebrahim. "Swelling and exclusion behavior of hydrogels." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74550.

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The swelling and exclusion behavior of crosslinked hydrogels were determined in aqueous solutions of electrolytes and in aqueous solutions of proteins and enzymes. The gels were ionic copolymers of acrylamide, ionic copolymers of N-isopropylacrylamide (NIPA) and homopolymers of NIPA. Both anionic (weak acid and strong acid) and cationic (strong base) monomers were used. The following new gels were synthesized: (a) copolymer of acrylamide and 2-acrylamido-2-methyl-1-propanesulfonic acid (R-SO$ sbsp{3}{-}$H$ sp+).$ (b) copolymer of NIPA and R-SO$ sbsp{3}{-}$H$ sp+.$ (c) copolymer of NIPA and sod

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3

Shitta, Abiola. "Modeling Swelling Instabilities in Surface Confined Hydrogels." Scholar Commons, 2010. https://scholarcommons.usf.edu/etd/1769.

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The buckling of a material subject to stress is a very common phenomenon observed in mechanics. However, the observed buckling of a surface confined hydrogel due to swelling is a unique manifestation of the buckling problem. The reason for buckling is the same in all cases; there is a certain magnitude of force that once exceeded, causes the material to deform itself into a buckling mode. Exactly what that buckling mode is as well as how much force is necessary to cause buckling depends on the material properties. Taking both a finite difference and analytical approach to the problem, it is de

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Swami, Salesh N., University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Radiation synthesis of polymeric hydrogels for swelling-controlled drug release studies." THESIS_CSTE_SFH_Swami_S.xml, 2004. http://handle.uws.edu.au:8081/1959.7/698.

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Hydrogels are three dimensional networks of hydrophilic homopolymers or copolymers generally covalently or ionically crosslinked. They interact with aqueous media by swelling to some equilibrium value by retaining the aqueous media in their structures. This study concerns the investigation of the swelling and the controlled drug release behaviour of hydrogels synthesized via the photopolymerisation process. The study of hydrogels in this project was oriented towards their biomedical applications as controlled drug delivery devices. It is a known fact that the complete conversion of monomers to

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Swami, Salesh N. "Radiation synthesis of polymeric hydrogels for swelling-controlled drug release studies." Thesis, View thesis, 2004. http://handle.uws.edu.au:8081/1959.7/698.

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Hydrogels are three dimensional networks of hydrophilic homopolymers or copolymers generally covalently or ionically crosslinked. They interact with aqueous media by swelling to some equilibrium value by retaining the aqueous media in their structures. This study concerns the investigation of the swelling and the controlled drug release behaviour of hydrogels synthesized via the photopolymerisation process. The study of hydrogels in this project was oriented towards their biomedical applications as controlled drug delivery devices. It is a known fact that the complete conversion of monomers to

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6

Swami, Salesh N. "Radiation synthesis of polymeric hydrogels for swelling-controlled drug release studies." View thesis, 2004. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20050729.124150/index.html.

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7

Patil, S. S. "Swelling controlled systems based on ionizable hydrogels: role of transition phenomena." Thesis(M.Sc.), CSIR-National Chemical Laboratory, Pune, 1992. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2018.

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8

Ahmadi, Mojtaba. "Mechanics of Surface Instabilities of Soft Nanofibers and Nonlinear Contacts of Hydrogels." Diss., North Dakota State University, 2020. https://hdl.handle.net/10365/31861.

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The research of this dissertation is formulated in two fields, i.e., the theoretical and computational studies of circumferential wrinkling on soft nanofibers and the swelling mechanics study of a bi-layered spherical hydrogel containing a hard core. Continuous polymer nanofibers have been massively produced by means of the low-cost, top-down electrospinning technique. As a unique surface instability phenomenon, surface wrinkling in circumferential direction is commonly observed on soft nanofibers in electrospinning. In this study, a theoretical continuum mechanics model is developed to expl

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9

Nováčková, Táňa. "Příprava syntetických superabsorbentů vody s obsahem huminových kyselin." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216990.

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This diploma thesis is focused on development and characterization of synthetic hydrogel materials containing humic acids. Based on the literature review, procedure for the preparation of synthetic superabsorbent containing humic acids was designed and optimized in order to maintain required functionality of the resulting materials, such as swelling abilities and to the controlled the release of humic substances. Very important part of this work was also characterization of superabsorbents by wide range of routine physic-chemical methods (rheometry, moisture analyzers, FT-IR). Preparation of t

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10

Slisenko, O. V., I. M. Bei, and V. L. Budzinska. "Synthesis and characterization of Polyacrylamide / Siloxane Double Network Hydrogels." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42515.

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A novel double-network (DN) hydrogels consisting of organic polyacrylamide (PAAm) network and inorganic siloxane network were synthesized by one-pot in situ polymerization. Spectral studies indicate a formation of DN structure of composite hydrogels obtained. Detailed study of the composites showed welldefined structurizing of hybrid hydrogels at molecular and nanolevel as well as intra- and intercomponent interactions via H-bonding. Nanostructurization possesses a great impact on final properties of the composite hydrogels. Prepared materials are characterized by improved thermal stability a

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Cates, Ryan S. "Influence of Crosslink Density on Swelling and Conformation of Surface-Constrained Poly(N-Isopropylacrylamide) Hydrogels." Scholar Commons, 2010. https://scholarcommons.usf.edu/etd/1592.

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A stimuli-responsive microgel is a three-dimensional polymer network that is able to absorb and expel a solvent (commonly water). These materials are unique in the fact that their sponge-like behavior can be actuated by environmental cues, like temperature, ion concentration, pH, and light. Because of the dynamic properties of these materials they have found applications in drug-delivery systems, micro-assays, selective filtration, artificial muscle, and non-fouling surfaces. The most well-known stimuli-responsive polymer is Poly(N-isopropylacrylamide) or PNIPAAm and it experiences a switchabl

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Benzeval, Ian. "Development of responsive polymers for drug delivery applications." Thesis, University of Bath, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500696.

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In this thesis, glucose responsive hydrogels based on cross-linked dextran molecules were studied to determine the diffusion rate of an insulin analogue. Investigations of the interaction between concanavalin A and dextran, both in free solution and in the form of glucose responsive hydrogels were conducted. The free solution results have shown that there is an increase of association constant between concanavalin A and dextran when the molecular mass of the dextran is increased. Free solution viscometric tests have shown that increasing the molecular mass or the concentration of the dextran i

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Vigata, Margaux Raphaelle Helene. "Photocrosslinkable hydrogels for controlled local drug delivery." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/212857/1/Margaux_Vigata_Thesis.pdf.

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Drug systemic side effects or acquired drug resistance are ongoing clinical challenges. In this Ph.D., a biodegradable hydrogel polymer system was developed to provide controlled localized delivery of drugs typically administered systemically. The system was characterised for anticancer and antibiotic applications with proven efficacy in vitro and high tailorability of the release profiles. Furthermore, the water content of the hydrogel system was investigated on a molecular level to provide more insight into its diffusive properties with changing environmental cues. Finally, a guideline was p

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14

Ayazoglu, Neslihan. "Synthesis And Characterization Of Hydrogels From Allyl Methacrylate And Acrylamide Copolymer." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613098/index.pdf.

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Acrylamide based hydrogels were synthesized through copolymerization reaction of allyl methacrylate with acrylamide. Copolymerization reactions were carried out with solution polymerization in tetrahydrofuran by using &alpha<br>-&alpha<br>-azoisobutyronitrile as an initiator at 60 0 C. Three copolymer compositions were studied having 5, 15, 25 molar percentage of allyl methacrylate as feed concentrations. The synthesized copolymers were characterized by FTIR, NMR, DSC, TGA and GPC. 1H-NMR spectra were used to confirm the chemical structures of the copolymers and to determine the comonomer com

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15

Zhang, Mengxue. "INFLUENCE OF SODIUM SALTS ON THE SWELLING AND RHEOLOGY OF HYDROPHOBICALLY CROSSLINKED, NON-IONIC HYDROGELS DETERMINED BY QCM-D." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555682656086202.

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BAZZI, AUREA de S. "Estudo da interacao quimica do poli(dimetilsiloxano-g-oxido de etileno) na membrana de poli(N-vinil-2-pirrolidona) e agar induzida com radiacao ionizante." reponame:Repositório Institucional do IPEN, 1999. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10735.

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Buchmann, Christian [Verfasser], and Gabriele [Akademischer Betreuer] Schaumann. "The swelling of interparticulate hydrogels in soil and their contribution to soil structural stability and soil-water interactions / Christian Buchmann ; Betreuer: Gabriele Schaumann." Landau : Universität Koblenz-Landau, Campus Landau, 2018. http://d-nb.info/1162893087/34.

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LOPERGOLO, LILIAN C. "Estudo da estrutura e dos parametros de reticulacao de membranas hidrofilas a base de poli(N-vinil-2-pirrolidona) induzidas por radiacao." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11073.

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Worrell, Kevin. "Chemical and mechanical characterization of fully degradable double-network hydrogels based on PEG and PAA." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/48985.

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Biodegradable hydrogels have become very promising materials for a number of biomedical applications, including tissue engineering and drug delivery. For optimal tissue engineering design, the mechanical properties of hydrogels should match those of native tissues as closely as possible because these properties are known to affect the behavior and function of cells seeded in the hydrogels. At the same time, high water-contents, large mesh sizes and well-tuned degradation rates are favorable for the controlled release of growth factors and for adequate transport of nutrients through the hydroge

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MIRANDA, LEILA F. de. "Estudo de parametros de processo para a sintese de membranas hidrofilicas a base de poli (n-vinil-2-pirrolidona)." reponame:Repositório Institucional do IPEN, 1999. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10705.

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MOMESSO, ROBERTA G. R. A. P. "Incorporacao e liberacao de resveratrol em hidrogeis polimericos." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9524.

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Pavlicová, Renata. "Vývoj a charakterizace hydrogelů s obsahem huminových látek pro kosmetické a farmaceutické aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240543.

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This thesis is focused on the development and characterization of hydrogels containing humic substances with possible use in cosmetic and pharmaceutical industries. This work follows on the bachelor thesis, theoretical and experimental part is based on already acquired knowledge. The aim of this work was to develop a literature review focusing on the potential use humic gels in practice and also to enhance the consistency of other active ingredients. Based on this literature review, the main aim was to prepare model humic hydrogels with selected active ingredients and their characterization by

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Lee, Jinhyun. "Development of an anisotropic swelling hydrogel for tissue expansion control over the degree, rate and direction of hydrogel swelling /." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/31693.

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Thesis (Ph.D)--Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: David G. Bucknall; Committee Member: Haskell W. Beckham; Committee Member: L. Andrew Lyon; Committee Member: Yadong Wang; Committee Member: Yonathan Thio. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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OLIVEIRA, MARIA J. A. de. "Obtenção de membranas de hidrógeis para tratamento alternativo da Leishmaniose tegumentar." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10511.

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Deng, Di Judy. "Swelling properties of hydrogel coatings on neural devices." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89966.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 30).<br>Glial scarring is a major problem seen in brain electrode implants that can hinder electrode function. One major contributing factor is the mechanical mismatch between the stiff electrode and the soft brain tissue'. Hydrogel coatings are being investigated to determine their effectiveness in providing the necessary biocompatibility. Polyethylene glycol hydrogels of various formulations were fabr

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Sterner, Olof. "Swelling and protein adsorption characteristics of stimuli-responsive hydrogel gradients." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-58586.

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<p>In this work, a gradient of interpenetrating polymer networks, consisting of anionic</p><p>and cationic polymers, has been investigated with respect to protein resistant</p><p>properties and swelling characteristics at different pH and ionic strength</p><p>conditions.</p><p> </p><p>The swelling and protein adsorption have been studied using <em>in situ </em>spectroscopic</p><p>ellipsometry(SE) and imaging surface plasmon resonance(iSPR) respectively.</p><p>It has been shown that, by altering the buffer pH, the region of lowest</p><p>protein adsorption on the surface could be moved laterally

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Su, Catherine K. (Catherine Kai-Lin). "Characterization of swelling and electroosmotic transport in polyelectrolyte hydrogel membranes." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/17252.

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Sveinsson, Hrafn Mar. "Constrained Hydrogel swelling in Biological Sensors : A Finite Element Method Approach." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19103.

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Material models has been developed for anionic and/or cationic hydrogels, with a simulation framework implemented in MATLAB and the finite element software ABAQUS. The geometry of the simulations is a hemispheroidal hydrogel, divided into a core with a shell, covalently attached to an optical fiber. The material models have been used to estimate the chemical parameters of poly-acrylamide hydrogels containing anionic or cationic monomer groups. Simulations comparing free and constrained swelling has been conducted in order to determine the effect of the geometrical constriction to the optical f

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Krause, A. T., S. Zschoche, M. Rohn, et al. "Swelling behavior of bisensitive interpenetrating polymer networks for microfluidic applications." Royal Society of Chemistry, 2016. https://tud.qucosa.de/id/qucosa%3A36411.

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Bisensitive interpenetrating polymer network (IPN) hydrogels of temperature sensitive net-poly(Nisopropylacrylamide) and pH sensitive net-poly(acrylic acid-co-acrylamide) for microfluidic applications were prepared via a sequential synthesis using free radical polymerization. The IPN indicated a suitable reversible alteration of swelling in response to the change in pH and temperature. The adequate change of the hydrogel volume is a basic requirement for microfluidic applications. Using the introduced correction factor f, it is possible to determine the cooperative diffusion coefficient (Dcoop

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Daňková, Kristýna. "Hydrogely hydrofobizovaného hyaluronanu a micel." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449413.

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This Master‘s thesis is focused on the preparation of hydrogels based on a hydrophobic derivative of hyaluronic acid palmitoyl hyaluronan in presence of biosurfactant decyl glucoside’s micelles and micelles of surfactant triton X-100. For followed characterization were chosen rheological tests and infrared spectrometry. There was observed influence of preparation method, type and concentration of surfactant and presence of micelles on final features of the hydrogel. Moreover, an experimental test of swelling was performed with interesting results for future research.

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GUPTA, PREETI. "HYDROGEL BASED WOUND DRESSING MATERIAL." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18806.

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Weak mechanical strength of hydrogels in wet condition limits their use for load bearing applications. Their mechanical strength can be raised by grafting them over some support or by converting them into nanofibrous form. Present thesis is focused on the preparation of poly (acrylamide-co-acrylic acid) hydrogel grafted over cotton fabric using two different cross-linkers i.e. PEG and MBAAm for making medicated dressing and nanofibers of hydrogel of poly (acrylamide-co-acrylic acid). FTIR was used to confirm the insertion of cross-links into the polymer chains. Grafting of uniform hydro

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Beres, Nathaniel R. "The Synthesis and Characteristics of a Novel Hydrogel Based on Linear Polyethylenimine." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1280526406.

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Augustine, Anusree. "Swelling induced debonding of thin hydrogel films grafted on silicon substrate : the role of interface physical-chemistry." Electronic Thesis or Diss., Université Paris sciences et lettres, 2022. http://www.theses.fr/2022UPSLS040.

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Les revêtements d'hydrogel sont des réseaux de polymères transparents et hydrophiles capables d’abosrber plusieurs fois leur épaisseur en eau. Cependant, les contraintes induites par le gonflement du film peuvent entraîner un décollement préjudiciable de l'hydrogel ce qui peut limiter l’utilisation pratique des ces revêtements. Dans cette étude, nous proposons de décrire les mécanismes de décollement de films minces d’hydrogel en fonction de leur densité de greffage à l'interface film/substrat. Le but est de pouvoir contrôler et prédire la dégradation des revêtements hydrogel pendant le gonfle

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Qian, Jin. "QUARTZ CRYSTAL MICROBALANCE WITH DISSIPATION MEASUREMENTS OF BINDER SWELLING AND SALTS EFFECTS ON PHYSICAL CROSSLINK HYDROGEL." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525746452221279.

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Konovalova, V. V., G. A. Pobigay, Y. M. Samchenko, A. F. Burban, and Z. R. Ulberg. "Nanocomposite Membranes with pH- and Thermo-sensitive Function." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35333.

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Resent researches and development in the field of membrane science are focused on improvement of synthetic membranes’ functionality. Combination of soft polymer pH- and temperature-sensitive hydrogels with rigid ultrafiltration membrane attracts much interest as a new class of smart functional systems. In this research we develop pH- and temperature-sensitive composite membranes using radical copolymerization method and study their properties depending on hydrogel composition, nature of synthetic mem-branes, temperature and pH of external medium. When you are citing the document, use the follo

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Kratochvílová, Romana. "Vývoj nových aplikačních forem huminových látek pro zemědělské a environmentální aplikace." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-432960.

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The new forms of superabsorbent polymers (SAP) on the base of acrylic acid were developed and studied in this thesis. The SAP are focused on agricultural and environmental applications. While they are applied to the soil, SAP can prevent water losing and they become a reservoir of humidity in case of dry season, moreover in combination with fertiliser they play role of controlled release medium. Eight various samples of SAP were experimentally prepared by networking of partially neutralized acrylic acid. Potassium peroxydisulfate was used as the initiator and N,N–methylenebisacrylamide as the

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Hájovská, Pavla. "Příprava a charakterizace směsných hydrogelů na bázi systému hyaluronan-albumin." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316178.

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This diploma thesis deals with preparation and subsequent characterization of albumin (BSA) and mixed hyaluronan-albumin (HA+BSA) hydrogels. The experimental characterization was based on the rheological measurements of the influence of ionic strength, pH and molar mass of HA on the gelation process and the properties of formed gels, as well as the time stability of these properties. Following object of the study was swelling of hydrogels in water and buffers with different pH value. Characterization was extended by thermal analysis, morphology description using scanning electron microscopy (S

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Ma, Yubing. "Swelling and Contraction Properties for Polyelectrolytes Multilayers and Polymer Thin Films Measured by In-situ Ellipsometry." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468755937.

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Garcia, João Antonio Farinelli. "Síntese e caracterização de novos bionanocompósitos híbridos constituídos por polissacarídeo carboximetilcelulose e nanoargila com possível aplicação para remoção ou liberação controlada de defensivo agrícola paraquat." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154254.

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Han, Ning. "Hydrogel-Electrospun Fiber Mat Composite Materials for the Neuroprosthetic Interface." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1292881087.

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Kim, Sangjoon. "The Development and Characterization of Double Layer Hydrogel for Agricultural and Horticultural Applications." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279116187.

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Kovářová, Lenka. "Studium fyzikálních gelů s hydrofobními doménami." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216963.

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The thesis is focused on physical hyaluronan gels. The object of study is the interaction of hyaluronan (HyA) with oppositely charged surfactants in physiologic solution (0.15 M NaCl), leading to the formation of gel. In the first part of work have been determined the solids´ contents (X) in gels and their supernatants in percentage and their correlation with molecular weight concentration of original HyA solution and the ratio of binding sites on hyaluronan chain and surfactant CTAB. To conclude, decrease in HyA concentration results in higher values of X and vice versa. On the other hand, in

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Ehrenhofer, Adrian, and Thomas Wallmersperger. "Adjustable fluid and particle permeation through hydrogel composite membranes." Sage, 2017. https://tud.qucosa.de/id/qucosa%3A74231.

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Membranes act as smart structures in respect to their permeation abilities. Control of particle and fluid permeation through a synthetic membrane can be achieved by using different effects like size-exclusion or electromagnetic interactions that occur between the particles and membrane pores. The simulation of controlled permeability provides an insight into the smart behavior of membranes for chemical signal processing, sensing interfaces or lab-on-a-chip devices. In the current work, we model the underlying physical processes on a microfluidic level using the engineer’s approach of laminar f

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Barghi, Hamidreza, and Sara Majdejabbari. "Biosuperabsorbent from proteins." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19216.

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The present work is synthesizing novel protein-based superabsorbent hydrogels from albumin protein (AP) and isolated zygomycetes protein (IZP) via modification with an acylating reagent and a bifunctional crosslinker, also investigation on their swelling behaviors under some conditions. The hydrophilic acylating reagent was introduced into albumin and zygomycetes proteins and hydrophylicity of albumin and isolated zygomycetes protein were increased by ethylenediaminetetraacetic dianhydride (EDTAD). Provided protein hydrogels through this method include modification of lysyl residues in the unf

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Yonezawa, Uilian Gabaldi [UNESP]. "Síntese, caracterização e aplicação de hidrogéis nanoestruturados contendo nanoargila para melhorar a germinação e qualidade de muda de hortaliça." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/138570.

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Submitted by UILIAN GABALDI YONEZAWA null (uilian_yonezawa@yahoo.com.br) on 2016-05-16T21:16:30Z No. of bitstreams: 1 dissertação Final.pdf: 3612402 bytes, checksum: b582b0fd2450b9deae8e2a4e625add5a (MD5)<br>Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-05-17T18:33:33Z (GMT) No. of bitstreams: 1 yonezawa_ug_me_ilha.pdf: 3612402 bytes, checksum: b582b0fd2450b9deae8e2a4e625add5a (MD5)<br>Made available in DSpace on 2016-05-17T18:33:33Z (GMT). No. of bitstreams: 1 yonezawa_ug_me_ilha.pdf: 3612402 bytes, checksum: b582b0fd2450b9deae8e2a4e625add5a

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Yonezawa, Uilian Gabaldi. "Síntese, caracterização e aplicação de hidrogéis nanoestruturados contendo nanoargila para melhorar a germinação e qualidade de muda de hortaliça /." Ilha Solteira, 2016. http://hdl.handle.net/11449/138570.

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Orientador: Fauze Ahmad Aouada<br>Resumo: Os hidrogéis são polímeros hidrorretentores reticulados, que são capazes de reter e absorver grande quantidade de água. A combinação de polissacarídeos e nanoargila na matriz polimérica otimiza o desenvolvimento de materiais biodegradáveis e nanoestruturados que podem ser utilizados na agricultura. Nesta dissertação foram preparados e caracterizados hidrogéis nanoestruturados biodegradáveis, afim de aplicá-lo como um acelerador no crescimento de mudas de hortaliça. Os hidrogéis foram preparados fixando as concentrações de acrilamida (AAm) em 6% m/v e c

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Delavoipière, Jessica. "Transport dans des films minces d'hydrogel : gonflement, frottement et rhéologie." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS386.

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Les films d’hydrogel sont envisagés comme revêtements anti-buée sur les vitrages. En effet, ils peuvent retarder l’apparition de la buée en absorbant plusieurs fois leur volume en eau. Cependant, une fois gonflés, la question de leur résistance mécanique se pose. Nous nous intéressons ici aux transferts d’eau vers et au sein de films d’hydrogel hors équilibre dans deux situations. D’abord, lorsqu’ils sont secs puis soumis à un flux d’air humide sur un substrat refroidi, nous avons étudié leur cinétique de gonflement. Ensuite, nous avons caractérisé leur réponse mécanique en indentation et en f

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Votte, Guillaume. "Synthèse de cristaux photoniques modulables à partir de films minces d’hydrogel stimulables." Electronic Thesis or Diss., Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLS010.

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La recherche dans le domaine des cristaux photoniques synthétiques progresse à grande vitesse. En parallèle, les progrès réalisés dans le domaine de la matière molle et des polymères permettent également des avancées considérables pour des dispositifs stimulables. Dans ces travaux de thèse, nous avons développé une plateforme permettant désynthétiser des nano- et microstructures d'hydrogel stimulables stables et à grandes amplitudes de déformation. Pour ce faire, nous avons utilisé la méthode CLAG (Cross-LinkingAnd Grafting) qui consiste en la réticulation et le greffage simultanés de chaînes

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Charlas, Benoit. "Etude du comportement mécanique d'un hydrure intermétallique utilisé pour le stokage d'hydrogène." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENI101/document.

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La raréfaction des combustibles fossiles et la prise en compte de plus en plus importante des enjeux environnementaux incite à rechercher de nouvelles pistes de production, stockage et transport de l’énergie. Le développement de la filière hydrogène dépend des améliorations de chacun de ces principaux maillons qui sont la production, le stockage, la distribution et l’utilisation de l’hydrogène.Cette thèse se consacre au stockage de l’hydrogène par absorption dans des matériaux solides pulvérulents composés d’hydrures intermétalliques. Les performances de ce type de stockage dépendent grandemen

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Leichsenring, Peter, and Thomas Wallmersperger. "Modeling and simulation of transport phenomena in ionic gels." SPIE, 2015. https://tud.qucosa.de/id/qucosa%3A35028.

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Ionic hydrogels belong to the class of polyelectrolyte gels or ionic gels. Their ability to swell or shrink under different environmental conditions such as change of pH, ion concentration or temperature make them promising materials, e.g. for microsensoric or microactuatoric devices. The hydrogel swelling exhibits nonlinear effects due to the occurrence of different interacting transport phenomena. Numerical simulations are an essential part in the ongoing development of microsensors and microactuators. In order to determine transport effects due to diffusion, migration and convection a multi

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