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Literatura académica sobre el tema "Hydrogels composites"

Autor: Grafiati

Publicado: 25 de mayo de 2024

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Artículos de revistas sobre el tema "Hydrogels composites"

Murshid, Nimer, Omar Mouhtady, Mahmoud Abu-samha, Emil Obeid, Yahya Kharboutly, Hamdi Chaouk, Jalal Halwani y Khaled Younes. "Metal Oxide Hydrogel Composites for Remediation of Dye-Contaminated Wastewater: Principal Component Analysis". Gels 8, n.º 11 (30 de octubre de 2022): 702. http://dx.doi.org/10.3390/gels8110702.

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Water pollution is caused by multiple factors, such as industrial dye wastewater. Dye-contaminated water can be treated using hydrogels as adsorbent materials. Recently, composite hydrogels containing metal oxide nanoparticles (MONPs) have been used extensively in wastewater remediation. In this study, we use a statistical and artificial intelligence method, based on principal component analysis (PCA) with different applied parameters, to evaluate the adsorption efficiency of 27 different MONP composite hydrogels for wastewater dye treatment. PCA showed that the hydrogel composites CTS@Fe3O4, PAAm/TiO2, and PEGDMA-rGO/Fe3O4@cellulose should be used in situations involving high pH, time to reach equilibrium, and adsorption capacity. However, as the composites PAAm-co-AAc/TiO2, PVPA/Fe3O4@SiO2, PMOA/ATP/Fe3O4, and PVPA/Fe3O4@SiO2, are preferred when all physical and chemical properties investigated have low magnitudes. To conclude, PCA is a strong method for highlighting the essential factors affecting hydrogel composite selection for dye-contaminated water treatment.

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Melek Tezcan, Melek Tezcan, Huseyin Cicek Huseyin Cicek y Meryem Cicek and Said Nadeem Meryem Cicek and Said Nadeem. "Tuning Photocatalytic Activity and Decomposition Properties of Poly(Polyethylene Glycol Diacrylate-co-Hydroxyethyl Methacrylate)/TiO2 Composite Hydrogel". Journal of the chemical society of pakistan 41, n.º 4 (2019): 598. http://dx.doi.org/10.52568/000778/jcsp/41.04.2019.

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We have synthesized TiO2-loaded porous polyethylene glycol diacrylate-co-hydroxyethyl methacrylate (poly(PEGDA-co-HEMA)) hydrogel composites having tunable photocatalytic properties with structural decomposition. TiO2 was loaded over hydrogels by impregnation of titanium oxobutyrate (Ti(OBu)4), peptized at room temperature that resulted poly(PEGDA-co-HEMA)/TiO2 composites. Pore morphology, crystalline structure and TiO2 content of the hydrogels/composites were examined using SEM, XRD and TGA analyses. Structural decomposition rate of the composite hydrogels and model contaminant (methyl orange) was performed under simulated sun light. Suitable pore size, morphology and higher PEGDA/HEMA ratio in the formulation increased the structural decomposition rate of the polymer that works as a TiO2 template. As the template breaks out, it leaves behind a porous TiO2 skeleton – thus accelerates the photocatalytic activity. Although the TiO2 template did not formed at lower PEGDA/HEMA ratio and lower molecular weight of PEGDA, decomposition rate of the composite slowed down (10 % in 108 h). The prepared hydrogels can be used in the skin care andamp; engineering and waste water treatments.

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Sokolova, Marina, Janis Locs y Dagnija Loca. "Hyaluronan Hydrogel/Calcium Phosphates Composites for Medical Application". Key Engineering Materials 721 (diciembre de 2016): 219–23. http://dx.doi.org/10.4028/www.scientific.net/kem.721.219.

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The combination of calcium phosphate compounds and hyaluronan is expected to have advantages of both materials to be used as optimal scaffold for bone tissue engineering. It possesses the fundamental necessary characteristics such as bioactivity, biomechanical similarity, processability, and biodegradability. Preparation technology and properties of hyaluronan acid and calcium phosphate composites (HA/CaP) are described in the current study, and for the first time composites with high, up to 0.43 HA/CaP mass ratio are synthesized using chemical cross-linking method.HA/CaP hydrogels were prepared using fixed cross-linker amount at different HA concentrations. Swelling properties of prepared HA/CaP hydrogels were investigated as function of the HA content in composite. The swelling properties of hydrogels were studied in phosphate-buffered saline (PBS) at pH 7.4. It was observed that HA reinforcement with CaP particles increases hydrogel stability, and prepared HA/CaP hydrogels maintained their integrity up to 4 weeks.

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Eraković, Zorica. "Graphene composites with hydrogel". Advanced Technologies 11, n.º 1 (2022): 53–62. http://dx.doi.org/10.5937/savteh2201053e.

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Composites are multiphase materials consisting of two or more different materials with different properties that are firmly bound to each other on the surface. As new nanomaterials, graphene and graphene oxide are particularly interesting due to their ability to form composites and nanocomposites with hydrogels. Graphene has attracted a lot of attention. Hydrogels are materials that have a three-dimensional structure, capable of absorbing a large amount of surrounding fluid without dissolving. Stimuli-sensitive hydrogels can change a physical property in response to external stimuli. Hydrogels based on monomers such as N, N-diethylacrylamide, and N-(2-hydroxyethyl) acrylamide exhibit great scientific and technological importance. They have found application in the paint and varnish industry, the pharmaceutical , cosmetic, food industry, agro-industry, and textile industries. Previous research has proven that graphene significantly boosts the electrical, thermal, and mechanical properties of hydrogels. Hydrogelcomposites with graphene have a porous structure. The paper represents a literature overview of methods for the synthesis and characterization of synthesized hydrogels and hydrogel composites with graphene and graphene oxide.

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Nadtoka, O., N. Kutsevol, T. Bezugla, P. Virych y A. Naumenko. "Hydrogel-Silver Nanoparticle Composites for Biomedical Applications". Ukrainian Journal of Physics 65, n.º 5 (11 de mayo de 2020): 446. http://dx.doi.org/10.15407/ujpe65.5.446.

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Polyacrylamide and dextran-graft-polyacrylamide hydrogels are prepared and used as nanoreactors and networks for the synthesis of silver nanoparticles (AgNPs). Photochemical generation of AgNPs is carried out under UV-irradiation of Ag+ ions in swollen hydrogels of different cross-linking densities. The obtained hydrogels and hydrogel/AgNPs composites are characterized by TEM, FTIR, and UV–Vis spectroscopy. Swelling studies have shown a relationship between the structure of the hydrogels and their ability to swell. It is shown that the presence of AgNPs in the polymer network leads to a decrease of the swelling capacity. An increase in the cross-linking density leads to an expansion of the AgNPs size distribution for both types of hydrogels. All synthesized hydrogel-silver nanoparticle composites have shown a high activity in the growth retardation of Staphylococcus aureus microorganisms.

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Liu, Shih-Ming, Wen-Cheng Chen, Chia-Ling Ko, Hsu-Ting Chang, Ya-Shun Chen, Ssu-Meng Haung, Kai-Chi Chang y Jian-Chih Chen. "In Vitro Evaluation of Calcium Phosphate Bone Cement Composite Hydrogel Beads of Cross-Linked Gelatin-Alginate with Gentamicin-Impregnated Porous Scaffold". Pharmaceuticals 14, n.º 10 (29 de septiembre de 2021): 1000. http://dx.doi.org/10.3390/ph14101000.

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Calcium phosphate bone cement (CPC) is in the form of a paste, and its special advantage is that it can repair small and complex bone defects. In the case of open wounds, tissue debridement is necessary before tissue repair and the subsequent control of wound infection; therefore, CPC composite hydrogel beads containing antibiotics provide an excellent option to fill bone defects and deliver antibiotics locally for a long period. In this study, CPC was composited with the millimeter-sized spherical beads of cross-linked gelatin–alginate hydrogels at the different ratios of 0 (control), 12.5, 25, and 50 vol.%. The hydrogel was impregnated with gentamicin and characterized before compositing with CPC. The physicochemical properties, gentamicin release, antibacterial activity, biocompatibility, and mineralization of the CPC/hydrogel composites were characterized. The compressive strength of the CPC/hydrogel composites gradually decreased as the hydrogel content increased, and the compressive strength of composites containing gentamicin had the largest decrease. The working time and setting time of each group can be adjusted to 8 and 16 min, respectively, using a hardening solution to make the composite suitable for clinical use. The release of gentamicin before the hydrogel beads was composited with CPC varied greatly with immersion time. However, a stable controlled release effect was obtained in the CPC/gentamicin-impregnated hydrogel composite. The 50 vol.% hydrogel/CPC composite had the best antibacterial effect and no cytotoxicity but had reduced cell mineralization. Therefore, the optimal hydrogel beads content can be 25 vol.% to obtain a CPC/gentamicin-impregnated hydrogel composite with adequate strength, antibacterial activity, and bio-reactivity. This CPC/hydrogel containing gentamicin is expected to be used in clinical surgery in the future to accelerate bone regeneration and prevent prosthesis infection after surgery.

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Kocak, Fatma Z., Muhammad Yar y Ihtesham U. Rehman. "Hydroxyapatite-Integrated, Heparin- and Glycerol-Functionalized Chitosan-Based Injectable Hydrogels with Improved Mechanical and Proangiogenic Performance". International Journal of Molecular Sciences 23, n.º 10 (11 de mayo de 2022): 5370. http://dx.doi.org/10.3390/ijms23105370.

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The investigation of natural bioactive injectable composites to induce angiogenesis during bone regeneration has been a part of recent minimally invasive regenerative medicine strategies. Our previous study involved the development of in situ-forming injectable composite hydrogels (Chitosan/Hydroxyapatite/Heparin) for bone regeneration. These hydrogels offered facile rheology, injectability, and gelation at 37 °C, as well as promising pro-angiogenic abilities. In the current study, these hydrogels were modified using glycerol as an additive and a pre-sterile production strategy to enhance their mechanical strength. These modifications allowed a further pH increment during neutralisation with maintained solution homogeneity. The synergetic effect of the pH increment and further hydrogen bonding due to the added glycerol improved the strength of the hydrogels substantially. SEM analyses showed highly cross-linked hydrogels (from high-pH solutions) with a hierarchical interlocking pore morphology. Hydrogel solutions showed more elastic flow properties and incipient gelation times decreased to just 2 to 3 min at 37 °C. Toluidine blue assay and SEM analyses showed that heparin formed a coating at the top layer of the hydrogels which contributed anionic bioactive surface features. The chick chorioallantoic membrane (CAM) assay confirmed significant enhancement of angiogenesis with chitosan-matrixed hydrogels comprising hydroxyapatite and small quantities of heparin (33 µg/mL) compared to basic chitosan hydrogels.

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Chuah, Clarence, Jing Wang, Javad Tavakoli y Youhong Tang. "Novel Bacterial Cellulose-Poly (Acrylic Acid) Hybrid Hydrogels with Controllable Antimicrobial Ability as Dressings for Chronic Wounds". Polymers 10, n.º 12 (29 de noviembre de 2018): 1323. http://dx.doi.org/10.3390/polym10121323.

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This investigation examines the combination of poly (acrylic acid) (PAA) and bacterial cellulose (BC) nanofibers to synthesize hydrogel hybrid composites used for wound dressing application. Amoxicillin (AM) was also grafted onto the composites for drug release. Fourier transform infrared analysis and scanning electron microscopy conducted revealed the structure and porosity of the composite being developed, as well as the successful fabrication of BC-PAA composites. The results of mechanical testing and hygroscopicity revealed that the composite shows higher stability than hydrogels which are currently used worldwide, albeit with a slight reduction in swelling capabilities. However, the composite was revealed to be responsive to a rise in pH values with an increase in composite swelling and drug release. These results together with their morphological characteristics suggest that BC-PAA hydrogel hybrid composite is a promising candidate for wound dressing application.

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Xiang, Yu, Li Bin Liu, Zhao Dang y Ting Li. "Progress of Graphene-Based Hydrogel". Materials Science Forum 852 (abril de 2016): 714–19. http://dx.doi.org/10.4028/www.scientific.net/msf.852.714.

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Graphene, a typical two-dimensional planar monolayer of sp2carbon atoms, has attracted significant attention due to its outstanding physical and chemical properties. Nowadays, many graphene-based composites have been synthesized. Among them, graphene hydrogels (including graphene oxide hydrogel and reduced graphene oxide hydrogel) as a kind of graphene-based composites have a wide application prospect. In this paper, the progresses of graphene-based hydrogels are reviewed, and the prospects for the development of graphene-based hydrogels are also discussed.

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Ahmad, Faheem, Bushra Mushtaq, Faaz Ahmed Butt, Muhammad Sohail Zafar, Sheraz Ahmad, Ali Afzal, Yasir Nawab, Abher Rasheed y Zeynep Ulker. "Synthesis and Characterization of Nonwoven Cotton-Reinforced Cellulose Hydrogel for Wound Dressings". Polymers 13, n.º 23 (25 de noviembre de 2021): 4098. http://dx.doi.org/10.3390/polym13234098.

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Hydrogels wound dressings have enormous advantages due to their ability to absorb high wound exudate, capacity to load drugs, and provide quick pain relief. The use of hydrogels as wound dressings in their original form is a considerable challenge, as these are difficult to apply on wounds without support. Therefore, the incorporation of polymeric hydrogels with a certain substrate is an emerging field of interest. The present study fabricated cellulose hydrogel using the sol–gel technique and reinforced it with nonwoven cotton for sustainable wound dressing application. The nonwoven cotton was immersed inside the prepared solution of cellulose and heated at 50 °C for 2 h to form cellulose hydrogel–nonwoven cotton composites and characterized for a range of properties. In addition, the prepared hydrogel composite was also loaded with titania particles to attain antibacterial properties. The Fourier transform infrared spectroscopy and scanning electron microscopy confirmed the formation of cellulose hydrogel layers inside the nonwoven cotton structure. The fabricated composite hydrogels showed good moisture management and air permeability, which are essential for comfortable wound healing. The wound exudate testing revealed that the fluid absorptive capacity of cellulose hydrogel nonwoven cotton composite was improved significantly in comparison to pure nonwoven cotton. The results reveal the successful hydrogel formation, having excellent absorbing, antimicrobial, and sustainable properties.

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Tesis sobre el tema "Hydrogels composites"

Lizardo, Daniel (Daniel H. ). "Architectural scale biomimetic composites based on chitosan and alginate hydrogels". Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98654.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, June 2015.
Cataloged from PDF version of thesis. "May 2015."
Includes bibliographical references (pages 44-46).
Developmental research and characterization was conducted on novel biomaterials for a larger project of product and architectural scale digital fabrication using natural bioplastics and hierarchical computational design carried out by the Mediated Matter team, led by Laia Mogas-Soldevila and Jorge Duro-Royo. Chitosan and alginate (among other natural polymers) are processed from shellfish waste and algae, respectively, and highly viscous solutions are extruded as a layer-by-layer printing material which dries into a solid, single material product with spatially variable functionality. Additional solid materials are added including cellulose microfibers and kaolinite platelets as volumetric aggregates, strengthening or stiffening aggregates, and as modes for directional properties. All materials used for aggregates, like that of the hydrogel matrices, were naturally sourced and recyclable. These composite materials were analyzed through microscopy and mechanical testing to begin to determine their agency in the aforementioned purposes. The most promising materials were selected and then discussed at length in an attempt to understand the factors behind ease of production, scalability, and potential for optimization, and as the research continues, they will be tested in the digital fabrication platform at the installation scale.
by Daniel Lizardo.
S.B.

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Roellinger, Bettina. "De nouveaux hydrogels composites pour la production et le stockage énergétique". Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLET053.

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Les hydrogels sont des matériaux poreux visco-élastiques formés d'un réseau tridimensionnel généralement de polymères capables d'absorber une grande quantité d'eau. Du fait de leurs propriétés, on les utilise principalement dans l'industrie pharmaceutique, agroalimentaire et dans le domaine des biotechnologies. Au cours de cette thèse, nous proposons d’ouvrir une voie encore peu exploitée qui est l’intégration des hydrogels pour le stockage et la production d’énergie. Dans un premier temps, les étapes qui ont conduit à la formulation ainsi qu’à la caractérisation physico-chimique d’une électrode poreuse à base d’alginate, un polyélectrolyte naturel,et de nanotubes de carbone sont décrites. Une première application consiste à encapsuler des bactéries électro-actives dans la matrice composite de carbone pour la production d’énergie. Le métabolisme particulier de la bactérie anaérobie Geobacter sulfurreducens permet des transferts d’électrons avec le milieu extérieur grâce à des réactions d’oxydo-réduction. Le suivi du courant dans le temps permet ainsi de montrer la prolifération et la viabilité des bactéries dans l’hydrogel jusqu’à déplétion du milieu en nutriments. Une seconde application est l’incorporation de particules d’intercalation du lithium dans cet hydrogel hybride, un matériau potentiellement utilisé dans des batteries en écoulement aqueuse. La caractérisation électro-chimique des couples redox MnO2/LiMn2O4 et FePO4/LiFePO4 au sein de l'hydrogel, montrera qu’il est possible de développer une batterie ion-lithium aqueuse d’une tension nominale de 0.65 V. Ce travail aura donc permis de mettre en avant l'intérêt et les perspectives de cet hydrogel conducteur pour le domaine énergétique
Hydrogels are highly water-absorbent three dimensional viscoelastic networks, mainly based on polymers used in numerous fields such as biotechnology, food and pharmaceutical industry. However, the potential use of these materials in the energy domain has not yet been fully investigated. To bring new insights and perspectives, we have developed during this PhD thesis a spherical macroporous electrode made of a conductive hydrogel. It is composed of sodium alginate, a polyelectrolyte that can form a biocompatible hydrogel when mixed with water in presence of divalent cations. The addition of carbon nanotubes in the solution before gelation leads to the formation of an electronically conductive network. The formulation and the physicochemical characterization are first discussed. Then two direct applications will be detailed. The first one consists in encapsulating electroactive bacteria inside the composite hydrogel. The peculiar metabolism of Geobacter sulfurreducens allows electron transfer with the external medium through oxydo-reduction reactions. Current monitoring allows us to show proliferation and viability of the cells until depletion of nutrients in the medium. The second one is the incorporation of intercalation lithium particles in the same matrix for semi-solid redox flow battery domain. Characterization of the redox couple MnO2/LiMn2O4 and FePO4/LiFePO4 inside the hydrogel, will enable us to develop a Li-ion battery with a 0.65 V nominal tension

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Samchenko, Yu M., S. O. Kryklia, T. P. Poltoratska, Леонід Федорович Суходуб, Леонид Федорович Суходуб, Leonid Fedorovych Sukhodub, Yu O. Isheikina, V. I. Makarenko y V. V. Konovalova. "Hybrid Hydrogel Materials with Incorporated Nanoparticles". Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35464.

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Synthesis and physico-chemical studies of new promising hybrid hydrogels based on polyvinyl alcohol (PVA) acetales and copolymer hydrogels based on vynil monomers have been studied. Acrylamide and Acrylnitrile were used as some of components that carry various fillers . Sponge acetales of polyvinyl alco-hol were used as enforcing net. The synthesized composites demonstrated high strength as compared to standard hydrogels- Yung-module varied in the range of 80 to 300 kPa depending on the extent of PVA ac-etale matrix filling with hydrogel component. The materials showed high sorbability to water and water solutions. Study of swelling kinetics as compared to solvents of various nature (water, ethanol, sunflower oil ) was carried out. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35464

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Marcasuzaa, Pierre. "Composites conducteurs à base de PANI : vers une architecture contrôlée de 2D à 3D". Pau, 2009. http://www.theses.fr/2009PAUU3047.

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Les polymères intrinsèquement conducteurs (PIC) sont une catégorie de matériaux qui connaissent actuellement un important essor. Cependant, leur principal inconvénient est leur insolubilité dans les solvants usuels. C’est pour cela que de nombreuses études les associent avec des matrices polymère pour former des composites. Lors de cette étude, nous avons synthétisé des copolymères à blocs conducteurs dont la structure chimique est contrôlée. Ces copolymères sont composés d’un bloc "matrice" et d’un second bloc conducteur. La première partie, polystyrène ou polyacrylate, est synthétisée par polymérisation radicalaire contrôlée (ATRP) afin de maîtriser les masses molaires (entre 5 000 et 15 000 g/mol) et la polymolécularité (Ip). La partie conductrice est un oligomère d’aniline. Puis, les deux blocs sont couplés pour former un copolymère dibloc. Cette synthèse est réalisée par voie conventionnelle (chauffage bain d’huile) et sous irradiation micro-onde. Une autre architecture de copolymère est réalisée, il s’agit du greffage de polyaniline sur un polymère naturel, le chitosane. En effet, celui-ci apporte des propriétés filmogène, mais également la possibilité de réaliser des hydrogels par réticulation du copolymère greffé. Ainsi un réseau dans lequel la PANI est répartie de façon homogène est obtenu
Intrinsically conducting polymers (ICPs) are a recent category of materials which currently make strong great strides. However, their main inconvenience is their insolubility in the usual solvents. That’s why lots of studies associate them with polymer matrices to make composites. During this study, conductive blocks copolymers with controlled architecture were obtained. These copolymers consist of a "matrix" block and a second conductive block. The first part, polystyrene or polyacrylate, is synthesized by controlled radical polymerization (ATRP) to control the molecular weight (between 5 000 and 15 000 g / mol) and the polydispersity (Ip). The conductive part is an oligomer of aniline. Then, both blocks are coupled to obtain a diblock copolymer. This synthesis is realized by conventional heating (bath of oil) and under microwave irradiation. Other architecture of copolymer is realized, it consists on the graft of polyaniline onto a natural polymer, the chitosane which brings coating properties, and the possibility of realizing hydrogels by crosslinking of grafting copolymer. So a network in which the PANI is distributed in a homogeneously is obtained

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Frayssinet, Antoine. "Hydrogels composites collagène/acide hyaluronique cellularisés et biomimétiques pour la régénération du Nucleus Pulposus". Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS312.

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50 % des douleurs dorsales chroniques sont associées à une dégénérescence du disque intervertébral (IVD). Nous avons émis l'hypothèse qu'un hydrogel biomimétique favoriserait la régénération du Nucleus Pulposus, la partie centrale de l’IVD, en fournissant des signaux physiques adéquats à des cellules souches mésenchymateuses (MSC) pour se différencier en nucléopulpocytes. Avec des teneurs différentes en acide hyaluronique fonctionnalisé (HA-Tyr), des hydrogels composites Collagène/HA-Tyr ont été synthétisés et caractérisés par microscopies électroniques à balayage et à transmission, rhéologie, DSC, par test de dégradation enzymatique in vitro accélérée et par tests de capacité à absorber l’eau. Des MSC ont ensuite été incorporées dans les composites Col/HA-Tyr, puis cultivées pendant 28 jours. La viabilité cellulaire a été évaluée, et leur différenciation en nucléopulpocytes analysée par PCR quantitative et par immunohistochimie indirecte. La présence de plusieurs marqueurs de différenciation des nucléopulpocytes, tels que le Collagène de type II, l'Agrécane et le KRT 18 a été suivie. Le processus de fabrication a permis la génération d'hydrogels hautement hydratés (> 90%), mécaniquement biomimétiques, résistants à la dégradation enzymatique et dans lesquels la fibrillogenèse du collagène a été préservée. En absence de facteur de différenciation, l’élasticité et la structure des hydrogels composites Col/HA-Tyr semble suffire pour induire la différenciation des MSC incorporées en nucléopulpocytes. Développée suivant une approche biomimétique, cette plateforme d'hydrogels composites Col/HA-Tyr parait donc prometteuse pour la régénération du disque intervertébral
Half of chronic back pain is associated with intervertebral disc (IVD) degeneration. We hypothesized that a biomimetic hydrogel would promote the regeneration of the Nucleus Pulposus, the central part of IVD. Hydrogels will provide cues to incorporated mesenchymal stem cells (MSC) to in situ differentiate into nucleopulpocytes. With different contents of functionalized hyaluronan (HA-Tyr), Collagen/HA-Tyr hydrogels were produced and characterized using scanning and transmission electron microscopy, rheology, DSC, accelerated in vitro enzymatic degradation and tested for their ability to absorb water. MSC were then incorporated within Col/HA-Tyr composites and cultured over 28 days. Cell viability was assessed and cell differentiation was analysed by quantitative PCR and indirect immunohistochemistry. The presence of several nucleopulpocytes differentiation markers, such as type II Collagen, Aggrecan and KRT 18 was monitored. The manufacturing process allowed the generation of highly hydrated hydrogels (> 90%), mechanically biomimetic, resistant against enzymatic degradation, in which collagen fibrillogenesis was preserved. Without any differentiation factor, both elasticity and structure of the Col/HA-Tyr composite hydrogels seems to be sufficient to induce the differentiation of the incorporated MSCs into nucleopulpocytes. In addition, the presence of collagen was necessary for an adequate cell adhesion. Developed according to a biomimetic approach, this platform of Col-HA-Tyr hydrogels appears promising for the intervertebral disc repair

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Mushi, Ngesa Ezekiel. "Chitin nanofibers, networks and composites : Preparation, structure and mechanical properties". Doctoral thesis, KTH, Biokompositer, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155528.

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Chitin is an important reinforcing component in load-bearing structures in many organisms such as insects and crustaceans (i.e. shrimps, lobsters, crabs etc.). It is of increasing interest for use in packaging materials as well as in biomedical applications. Furthermore, biological materials may inspire the development of new man-made material concepts. Chitinmolecules are crystallized in extended chain conformations to form nanoscale fibrils of about 3 nm in diameter. In the present study, novel materialshave been developed based on a new type of chitin nanofibers prepared from the lobster exoskeleton. Improved understanding about effects of chitin from crustaceans and chitin material preparation on structure is provided through Atomic Force Microscopy(AFM) (paper I&II), Scanning Transmission Electron Microscopy(STEM) (paper I&II), X-Ray Diffraction (XRD), Intrinsic Viscosity, solid state 13C Nuclear Magnetic Resonance (NMR) (paper II), Field Emission Scanning Electron Microscopy(FE-SEM) (paper I, II, III, IV & V), Ultraviolet-Visible Spectrophotometryand Dynamic Light Scattering (DLS) (paper III). The presence of protein was confirmed through colorimetric method(paper I & II). An interesting result from the thesis is the new features of chitin nanofiber including small diameter, high molar mass or nanofiber length,and high purity. The structure and composition of the nanofibers confirms this (paper I & II). Furthermore, the structure and properties of the corresponding materials confirm the uniqueness of the present nanofibers: chitin membrane (I & II), polymer matrix composites (III),and hydrogels (paper IV). Improved mechanical properties compared with typical data from the literature were confirmed for chitin nanofiber membranes in paper II, chitin-chitosan polymer matrix composites in paper III, and chitin hydrogel in paper IV. Mechanical tests included dynamic mechanical analysis and uniaxial tensile tests. Mechanical properties of chitin hydrogels were evaluated based onrheological and compression properties (paper IV). The values were the highest reported for this kind of chitin material. Furthermore, the relationships between materials structure and properties were analyzed. For membranes and polymer matrix nanocomposites, the degree of dispersion is an important parameter. For the hydrogels, the preparation procedure is very simple and has interesting practical potential. Chitin-binding characteristics of cuticular proteins areinteresting fornovel bio-inspired material development. In the present work(paper V), chitin nanofibers with newfeaturesincluding high surface area and low protein content were combined with resilin-like protein possessing the chitin-binding characteristics. Hydrated chitin-resilin nanocomposites with similar composition as in rubber-like insect cuticles were prepared. The main objective was to improve understanding on the role of chitin-binding domain on mechanical properties. Resilin is a rubber-like protein present in insects. The exon I (comprising 18 N-terminal elastic repeat units) together with or without the exon II (a typical cuticular chitin-binding domain) from the resilin gene CG15920 found in Drosophila melanogasterwere cloned and the encoded proteins were expressed as soluble products in Escherichia coli.Resilin-like protein with chitin-binding domain (designated as ResChBD) adsorbedin significant amount to chitin nanofiber surface andprotein-bound cuticle-like soft nanocomposites were formed. Although chitin bindingwas taking place only in proteinswith chitin-binding domain, the global mechanical behavior of the hydrated chitin-resilin nanocomposites was not so sensitive to this chitin-resilin interaction. In summary, chitin is an interesting material component with high potential as mechanical reinforcement in a variety of nanomaterials. The present study reports the genesisof novel chitin nanofibers and outlines the basic relationships between structure and properties for materials based on chitin. Future work should be directed towards both bio-inspired studies of the nanocomposite chitin structures in organisms, as well as the industrial applications of chitin waste from the food industry. Chitin nanofibers can strengthen the properties of materials, andprovide optical transparency as well as biological activities such as antimicrobial properties.

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Kryklia, S. O., Yu M. Samchenko, N. O. Pasmurtseva, V. V. Konovalova y S. M. Scherbakov. "Nano-Sized Hydrogel Composites Based on N-Isopropylacrylamide and Magnetite for Controlled Drug Delivery". Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42510.

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Synthesis and characterization studies of promising nano-sized hydrogel composites based on nisopropylacrylamide and magnetite have been studied. N-isopropylacrylamide (NIPA) gel component was used as a carrier of various drugs, magnetite was used as a magneto-responsive component. Presence of magnetite it was proved by EPR method. Composite nanoparticles were characterized by electron microscopy (TEM) and by dynamyc light scattering (DLS) method. It was shown that the average size of nanoparticles is 50 or 100 nm, depending on the method of preparation. The hydrogel is characterized by clear phase transition between swollen and collapsed state upon heating above 32⁰C. Rapid release of the incorporated drug (as a model was used the photosensibilizer -Methylene Blue) observed during thermoresponsive nanocomposite gels heating in the physiologically acceptable range, but still above phase transition temperature (up to 40–50 ⁰C), allows application of the discussed drug delivery systems in medical hyperthermia.

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Knudsen, Bernard. "A Rheological Examination of Polymer Composites: Including Functionalized Carbon Nanotubes, Viable Polyurethane Alternates, and Contact Lens Hydrogels". Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4522.

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From medicine to aerospace, innovation in multiple fields will not occur without addressing current questions that still exist in polymer behavior and manipulation. This dissertation represents the research carried out over the course of three separate experiments using rheometry as the key technique to explore the behavior of polymer composites. In all three studies, polymer composites were investigated for changes to their known physical properties caused through the addition of a filler or functionalization. Chapter Two examines the possibility of enhancing poly(4-methyl-1-pentene) through the use of soluble carbon nanotubes. In this series of experiments, carbon nanotubes were covalently functionalized using reductive alkylation with a dodecyl group to render them easily soluble in the same organic solvents as low molecular weight poly(4-methyl-1-pentene). The polymer and the functionalized nanotubes were dissolved together in carbon tetrachloride then the solvent is removed leaving the functionalized nanotubes uniformly dispersed in the polymer matrix. The composites were then compression molded and the changes to the physical properties were explored. The functionalized nanotube filler generally acted to plasticize the samples producing transparent but colored polymers. The samples had a lower modulus and glass transition which was the opposite found by Clayton et al. using sonicated pristine carbon nanotubes. Polyurethanes have a growing significance in the biomedical field, and we explore the possibility fine tuning the properties of a polyurethane for such uses in Chapter Three. Here, self healing Polycarbonate polyurethanes (PCU) were synthesized with two different soft segments, Nippollan 964 and T-5652, and characterized with dielectric analysis (DEA), differential scanning calorimetry (DSC) and rheometry. The extra methyl group acted to produce a crystalline-like ordered hard segment that caused the 964 PCU to become Arrhenius in the glass transition region where the 5652 PCU had followed WLF behavior. Results showed the pendent methyl group acted to impart a crystalline-like character to the 964 PCU making it a candidate for applications that would be suited to a stiffer polymer. In Chapter Four we explore the possibility of increasing the wearability and comfort of contact lenses through increased hydration. The hydrogels 2-hydroxyethylmethacrylate (HEMA) and glycidyl methacrylate (GMA) solutions were created in three concentrations; neat, 50/50 and 60/40. Into these samples [Cu2({μ2-CO2}R)4(axial)2] (Cu(II) 4-hydroxybenzoic acid (MHBC) were dissolved 0.05% by weight. The samples were then polymerized via UV polymerization and compression molded. The experiments performed included penetration resistance , water absorption, micro hardness and glass transition. Addition of the MHBC acted to increase the water uptake of the samples but also reduced their ability to withstand mechanical penetration. With further study into crosslinking of the polymers, the MHBC could show promise in increasing hydration for commercial use.

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Hawkins, Ashley Marie. "BIODEGRADABLE HYDROGELS AND NANOCOMPOSITE POLYMERS: SYNTHESIS AND CHARACTERIZATION FOR BIOMEDICAL APPLICATIONS". UKnowledge, 2012. http://uknowledge.uky.edu/cme_etds/10.

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Hydrogels are popular materials for biological applications since they exhibit properties like that of natural soft tissue and have tunable properties. Biodegradable hydrogels provide an added advantage in that they degrade in an aqueous environment thereby avoiding the need for removal after the useful lifetime. In this work, we investigated poly(β-amino ester) (PBAE) biodegradable hydrogel systems. To begin, the factors affecting the macromer synthesis procedure were studied to optimize the reproducibility of the resulting hydrogels made and create new methods of tuning the properties. Hydrogel behavior was then tuned by altering the hydrophilic/hydrophobic balance of the chemicals used in the synthesis to develop systems with linear and two-phase degradation profiles. The goal of the research was to better understand methods of controlling hydrogel properties to develop systems for several biomedical applications. Several systems with a range of properties were synthesized, and their in vitro behavior was characterized (degradation, mechanical properties, cellular response, etc.). From these studies, materials were chosen to serve as porogen materials and an outer matrix material to create a composite scaffold for tissue engineering. In most cases, a porous three dimensional scaffold is ideal for cellular growth and infiltration. In this work, a composite with a slow degrading outer matrix PBAE with fast degrading PBAE microparticles was created. First, a procedure for developing porogen particles of controlled size from a fast-degrading hydrogel material was developed. Porogen particles were then entrapped in the outer hydrogel matrix during polymerization. The resulting composite systems were degraded and the viability of these systems as tissue engineering scaffolds was studied. In a second area of work, two polymer systems, one PBAE hydrogel and one sol-gel material were altered through the addition of iron oxide nanoparticles to create materials with remote controlled properties. Iron oxide nanoparticles have the ability to heat in an alternating magnetic field due to the relaxation processes. The incorporation of these nanoscale heating sources into thermosensitive polymer systems allowed remote actuation of the physical properties. These materials would be ideal for use in applications where the system can be changed externally such as in remote controlled drug delivery.

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Butcher, Annabel Louise. "Deformation and fracture of soft materials for cartilage tissue engineering". Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277890.

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Damaged cartilage can cause severe pain and restricted mobility, with few long term treatments available. The developing field of tissue engineering offers an alternative to the currently used full joint replacement. Restoring damaged cartilage through tissue engineering would enable an active lifestyle to be recovered and retained, without restrictions to joint mobility. This is increasingly important as the prevalence of osteoarthritis rises. Tissue engineering requires biomaterial scaffolds that mimic the function of the tissue while cells develop, and so the scaffold must provide the appropriate biological, chemical and mechanical stimuli. In this work, methods were developed to enable the design of scaffolds that mimic the microstructure and mechanical properties of articular cartilage. Electrospinning was investigated as a method to mimic the nanoscale collagen fibres within cartilage extracellular matrix. A parametric study was conducted to determine how changes to a gelatin solution affect the mechanical properties of the non-woven fibrous mesh. The solution properties had a clear impact on the morphology of the fibres, but the effect on the mesh mechanical properties was convoluted. The results demonstrated the need for greater understanding of the 3D morphology of electrospun meshes, to establish how these may be altered in order to design scaffolds with desirable mechanical properties. The fracture mechanics of soft materials are complex, and are generally overlooked when designing tissue engineering scaffolds. The complexities have led to a lack of standardised testing, making comparisons between studies impractical. In this work, fracture testing methods were compared, using a viscoelastic polymer to mimic some of the complexities of soft tissue mechanics. Mode III trouser tear tests and mode I pure shear tests were found to provide reliable measurements. Due to the ease of testing small samples, trouser tear testing was concluded to be the most advantageous for determining the fracture resistance of soft tissue engineering scaffolds. Finally, electrospun meshes were combined with hydrogels to create biomimetic scaffolds, which were characterised using tensile and trouser tear fracture tests. Fibre-reinforcement was shown to enhance the mechanical properties of a weak hydrogel, but diminished those of a strong, tough polyacrylamide (PAAm)-alginate hydrogel. The PAAm-alginate hydrogel exhibited mechanical properties close to those of natural articular cartilage, but without the microstructure that would enhance its suitability for use as a cartilage tissue engineering scaffold. An alternative method for reinforcing PAAm-alginate was proposed, which shows promise for producing a biocompatible scaffold that mimics both the mechanics and the microstructure of articular cartilage. Ultimately, this thesis aimed to improve the design of biomimetic scaffolds for cartilage tissue engineering, and advance mechanical characterisation techniques within this field.

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Libros sobre el tema "Hydrogels composites"

H, Jones Russell, Ricker Richard E, Minerals, Metals and Materials Society., ASM International. Materials Science Division. y Conference on Environmental Effects on Advanced Materials., eds. Environmental effects on advanced materials. Warrendale, Pa: Minerals, Metals & Materials Society, 1991.

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Takahira, Kamigaki, Kubota Etsuo y United States. National Aeronautics and Space Administration., eds. Electrically conducting polymer-copper sulphide composite films, preparation by treatment of polymer-copper (II) acetate composites with hydrogen sulphide. Washington, DC: National Aeronautics and Space Administration, 1988.

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Fukassei ketsugō, fukassei bunshi no kasseika: Kakushinteki na bunshi henkan hannō no kaitaku = Bond activation and molecular activation. Kyōto-shi: Kagaku Dōjin, 2011.

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United States. National Aeronautics and Space Administration., ed. Trade study plan for reusable hydrogen composite tank system (RHCTS). [Downey, Calif.]: Rockwell Aerospace, Space Systems Division, 1994.

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United States. National Aeronautics and Space Administration., ed. Structural arrangement trade study: Reusable hydrogen composite tank system and graphite composite primary structures (GCPS) : executive summary. [Washington, DC: National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., ed. Selection process for trade study: Reusable hydrogen composite tank system (RHCTS). [Downey, Calif.]: Rockwell Aerospace, Space Systems Division, 1994.

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United States. National Aeronautics and Space Administration., ed. Addendum to structural arrangement trade study: Reusable hydrogen composite tank system (RHCTS) and graphite composite primary structures (GCPS). [Washington, DC: National Aeronautics and Space Administration, 1995.

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E, Lake R., Wilkerson C y George C. Marshall Space Flight Center., eds. Unlined reusable filament wound composite cryogenic tank testing. [Marshall Space Flight Center, Ala.]: National Aeronautics and Space Administration, Marshall Space Flight Center, 1999.

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George C. Marshall Space Flight Center., ed. Acoustic emission monitoring of the DC-XA composite liquid hydrogen tank during structural testing. MSFC, Ala: National Aeronautics and Space Administration, Marshall Space Flight Center, 1996.

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Capítulos de libros sobre el tema "Hydrogels composites"

Allamraju, K. Viswanath. "Green Hydrogels". En Green Composites, 225–49. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9643-8_8.

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Samal, Sangram K., Federica Chiellini, Cristina Bartoli, Elizabeth G. Fernandes y Emo Chiellini. "Hybrid Hydrogels Based on Poly(vinylalcohol)-Chitosan Blends and Relevant CNT Composites". En Hydrogels, 67–78. Milano: Springer Milan, 2009. http://dx.doi.org/10.1007/978-88-470-1104-5_7.

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Xu, Min y Hailong Huang. "Multifunctional Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 1–29. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76573-0_15-1.

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Xu, Min y Hailong Huang. "Multifunctional Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 375–403. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-77830-3_15.

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Panahi, Reza y Mahsa Baghban-Salehi. "Protein-Based Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 1–40. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76573-0_52-1.

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Rashid, Taslim Ur, Sadia Sharmeen, Shanta Biswas, Tanvir Ahmed, Abul K. Mallik, Md Shahruzzaman, Md Nurus Sakib, Papia Haque y Mohammed Mizanur Rahman. "Gelatin-Based Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 1–41. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76573-0_53-1.

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Reduwan Billah, Shah M., Md Ibrahim H. Mondal, Sazzad H. Somoal, M. Nahid Pervez y Md Obidul Haque. "Enzyme-Responsive Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 1–23. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76573-0_62-1.

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Panahi, Reza y Mahsa Baghban-Salehi. "Protein-Based Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 1561–600. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-77830-3_52.

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Rashid, Taslim Ur, Sadia Sharmeen, Shanta Biswas, Tanvir Ahmed, Abul K. Mallik, Md Shahruzzaman, Md Nurus Sakib, Papia Haque y Mohammed Mizanur Rahman. "Gelatin-Based Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 1601–41. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-77830-3_53.

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Reduwan Billah, Shah M., Md Ibrahim H. Mondal, Sazzad H. Somoal, M. Nahid Pervez y Md Obaidul Haque. "Enzyme-Responsive Hydrogels". En Polymers and Polymeric Composites: A Reference Series, 309–30. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-77830-3_62.

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Actas de conferencias sobre el tema "Hydrogels composites"

Obra, Johndel, James Quin Maranan, Denise Faye Lensoco y Terence Tumolva. "Synthesis and Characterization of NaCMC/HEC/ Activated Carbon Hydrogel Composites for the Desalination of Seawater". En 7th GoGreen Summit 2021. Technoarete, 2021. http://dx.doi.org/10.36647/978-93-92106-02-6.16.

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Current available methods for water desalination are energy intensive, expensive, and not feasible for small-scale applications. As an alternative, hydrogels and hydrogel composites may be utilized both as draw agent and semi-permeable membrane to desalinate water via forward osmosis. In this study, a non-toxic, biodegradable, and low-cost hydrogel composite is prepared by adding activated carbon (AC) as filler to a 3:1 blend of sodium carboxymethyl cellulose (NaCMC) and hydroxyethyl cellulose (HEC), with citric acid as crosslinking agent. A one factor-at-a-time (OFAT) analysis was performed to correlate the crosslinker concentration, crosslinking duration, and AC content to the swelling and desalination efficiency of the CMC/HEC/AC hydrogel composite. Results showed that the swelling of the hydrogel varies directly with the crosslinking duration but varies inversely with the crosslinking concentration. The experiments also showed that the addition of AC as filler significantly improves the desalination efficiency of the hydrogel composite; however, it was also observed that efficiency is reduced if the AC content is excessive.

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Marks, William H., Sze C. Yang, George W. Dombi y Sujata K. Bhatia. "Carbon Nanobrushes Embedded Within Hydrogel Composites for Tissue Engineering". En ASME 2013 2nd Global Congress on NanoEngineering for Medicine and Biology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/nemb2013-93122.

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The objective of this work is to study the effect of carbon nanobrushes embedded within hydrogel composites on tissue engineering. The carbon nanobrushes, providing electrical conductivity to the hydrogels, influence the growth and proliferation of clinically relevant cell lines within the hydrogel composite. The composite is comprised of carbon nanobrushes embedded in a biocompatible poloxamer gel. This work assesses the ability of such composite gels to support the growth of tissue by studying fibroblasts and myoctes, which serve as indicators on the feasibility of this platform eventually serving as a matrix to stimulate wound closure and repair injured tissue. In such a model, fibroblasts and myocytes are seeded separately on the composite hydrogel and bathed in culture medium. The experimental model assesses the ability of fibroblasts and myocytes to grow into and adhere to the gel containing carbon nanobrushes. The work demonstrates that carbon nanobrushes can be dispersed within poloxamer gels, and that fibroblasts and myoctyes can proliferate within a poloxamer gel containing homogenously dispersed carbon nanobrushes. The work also examines the role of the carbon nanobrushes in altering the physical properties of the hydrogel composite. This work has relevance for tissue engineering and tissue regeneration in clinical medicine, with a focus on utilizing biomimetic and bioinspired materials, like the carbon nanobrushes, to enhance growth capabilities.

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Bignotti, Fabio, Luciana Sartore y Gloria Spagnoli. "A versatile method for obtaining hydrophobically modified hydrogels". En 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045961.

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Bignotti, Fabio, Silvia Agnelli, Francesco Baldi, Luciana Sartore y Isabella Peroni. "Macroporous hydrogels with tailored morphology and mechanical properties". En VIII INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2016. http://dx.doi.org/10.1063/1.4949741.

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Dey, Kamol, Silvia Agnelli y Luciana Sartore. "High performance gelatin/polyethylene glycol macroporous hydrogels for biomedical applications". En 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045869.

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Sartore, L., K. Dey, S. Agnelli, F. Bignotti, N. Lopomo, M. A. Khan, V. Barbera y M. Galimberti. "Novel nanobiocomposite hydrogels based on gelatin/chitosan and functionalized graphene". En 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045978.

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Tomić, Simonida Lj, Marija M. Babić, Jovana S. Vuković, Marija D. Perišić, Vuk V. Filipović, Sladjana Z. Davidović y Jovanka M. Filipović. "2-hydroxyethyl metahcrylate/gelatin based superporous hydrogels for tissue regeneration". En VIII INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2016. http://dx.doi.org/10.1063/1.4949668.

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Salerno, Aurelio, Paolo A. Netti, A. D’Amore, Domenico Acierno y Luigi Grassia. "Porous Polyelectrolyte Hydrogels With Enhanced Swelling Properties Prepared Via Thermal Reverse Casting Technique". En V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2010. http://dx.doi.org/10.1063/1.3455639.

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Nobile, Lucio y Stefano Nobile. "Simple fracture testing of hydrogels for cartilage or bone tissue engineering". En 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045976.

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Cidade, M. T., D. J. Ramos, J. Santos, N. Calero, J. Muñoz y J. P. Borges. "Injectable hydrogels based on pluronic/water systems filled with alginate microparticles: Rheological characterization". En 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5045953.

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Informes sobre el tema "Hydrogels composites"

Li, Yuzhan, Vera Bocharova, Seung Pyo Jeong, Navin Kumar, Som Shrestha, Kyle Gluesenkamp y Diana Hun. Fabrication of New PCM Hydrogel Composites. Office of Scientific and Technical Information (OSTI), abril de 2021. http://dx.doi.org/10.2172/1779119.

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Ruckman, M. W., H. Wiesmann, M. Strongin, K. Young y M. Fetcenko. Composite Metal-hydrogen Electrodes for Metal-Hydrogen Batteries. Office of Scientific and Technical Information (OSTI), abril de 1997. http://dx.doi.org/10.2172/770461.

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Fort, III, William C., Richard A. Kallman, Miguel Maes, Edward G. Skolnik y Steven C. Weiner. Safety Evaluation Report: Development of Improved Composite Pressure Vessels for Hydrogen Storage, Lincoln Composites, Lincoln, NE, May 25, 2010. Office of Scientific and Technical Information (OSTI), diciembre de 2010. http://dx.doi.org/10.2172/1122334.

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Livingston, R. R. Test Plan for Composite Hydrogen Getter Materials. Office of Scientific and Technical Information (OSTI), noviembre de 2000. http://dx.doi.org/10.2172/767285.

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Giannis, S., A. S. Maxwell, F. Omoniyi y M. G. Veerabhadrappa. Hydrogen gas permeability through polymer composites - test setup development. National Physical Laboratory, noviembre de 2022. http://dx.doi.org/10.47120/npl.mat111.

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Newhouse, Norman L. Development of Improved Composite Pressure Vessels for Hydrogen Storage. Office of Scientific and Technical Information (OSTI), abril de 2016. http://dx.doi.org/10.2172/1249338.

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J. Douglas Way y Paul M. Thoen. Palladium/Copper Alloy Composite Membranes for High Temperature Hydrogen Separation. US: Trustees Of The Colorado School Of Mines, agosto de 2006. http://dx.doi.org/10.2172/898816.

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Ilias, S., F. G. King, N. Su y U. I. Udo-Aka. Separation of hydrogen using thin film palladium-ceramic composite membrane. Office of Scientific and Technical Information (OSTI), noviembre de 1995. http://dx.doi.org/10.2172/128538.

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J. Douglas Way. PALLADIUM/COPPER ALLOY COMPOSITE MEMBRANES FOR HIGH TEMPERATURE HYDROGEN SEPARATION. Office of Scientific and Technical Information (OSTI), agosto de 2004. http://dx.doi.org/10.2172/835876.

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J. Douglas Way y Paul M. Thoen. Palladium/Copper Alloy Composite Membranes for High Temperature Hydrogen Separation. Office of Scientific and Technical Information (OSTI), agosto de 2005. http://dx.doi.org/10.2172/860440.

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