Gotowe bibliografie tematyczne / Bland- Nanocomposites

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Gotowa bibliografia na temat „Bland- Nanocomposites”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Bland- Nanocomposites"

Sekulić, Zorana, Jasmina Grbović Novaković, Bojana Babić, Milica Prvulović, Igor Milanović, Nikola Novaković, Dragan Rajnović, Nenad Filipović i Vanja Asanović. "The Catalytic Effect of Vanadium on Sorption Properties of MgH2-Based Nanocomposites Obtained Using Low Milling Time". Materials 16, nr 15 (5.08.2023): 5480. http://dx.doi.org/10.3390/ma16155480.

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The effects of catalysis using vanadium as an additive (2 and 5 wt.%) in a high-energy ball mill on composite desorption properties were examined. The influence of microstructure on the dehydration temperature and hydrogen desorption kinetics was monitored. Morphological and microstructural studies of the synthesized sample were performed by X-ray diffraction (XRD), laser particle size distribution (PSD), and scanning electron microscopy (SEM) methods, while differential scanning calorimetry (DSC) determined thermal properties. To further access amorph species in the milling blend, the absorption spectra were obtained by FTIR-ATR analysis (Fourier transform infrared spectroscopy attenuated total reflection). The results show lower apparent activation energy (Eapp) and H2 desorption temperature are obtained for milling bland with 5 wt.% added vanadium. The best explanation of hydrogen desorption reaction shows the Avrami-Erofeev model for parameter n = 4. Since the obtained value of apparent activation energy is close to the Mg-H bond-breaking energy, one can conclude that breaking this bond would be the rate-limiting step of the process.

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Tekay, Emre. "Preparation of tough, high modulus, and creep-resistant PS/SIS/halloysite blend nanocomposites". Journal of Thermoplastic Composite Materials 33, nr 8 (9.06.2020): 1125–44. http://dx.doi.org/10.1177/0892705720930777.

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In this work, polystyrene (PS)/poly(styrene-b-isoprene-b-styrene) (SIS)/organophilic halloysite nanotube (Org-HNT) blend nanocomposites were produced by melt compounding technique. The significant improvements in both toughness and impact strength values were obtained in PS/SIS blends containing 20%, 30%, and 40% SIS elastomer as compared to neat PS. Among them, PS-30SIS blend with a co-continuous morphology exhibited moderate tensile and impact properties and its nanocomposites having 3, 5, 7 and 10 phr Org-HNT were prepared through the melt mixing method. All the nanocomposites exhibited continuous/fibrillar morphologies with smaller elastomer domains and higher tensile modulus and toughness as compared to PS-30SIS blend. Among them, the nanocomposite having 7 phr Org-HNT and 30% SIS phase (7H-30SIS) exhibited the highest impact strength with enhanced tensile properties. The same nanocomposite exhibited about 21% and 100% increments in the modulus and toughness in comparison to its blend, respectively. The 7H-30SIS nanocomposite increased storage moduli of PS-30SIS blend at glass transition regions of both polyisoprene and PS phases and also at room temperature. Moreover, the rubbery storage moduli of the nanocomposites were found to be about 37% and 53% higher for 7 and 10 phr Org-HNT loaded nanocomposites, respectively, in comparison with that of PS-30SIS blend. The creep deformation and permanent deformation of the blend both decreased via introduction of the nanotubes which is in agreement with aforementioned improvements in the stiffness.

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Asgari, Alireza, Hassan Ebadi-Dehaghani, Davoud Ashouri, Saman Mousavian i Navid Jaberzadeh Ansari. "An Investigation on Polypropylene/Nylon 66/TiO₂ Blend Nanocomposites: Rheological Models". Advanced Materials Research 739 (sierpień 2013): 111–16. http://dx.doi.org/10.4028/www.scientific.net/amr.739.111.

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Nanocomposites based on polypropylene (PP), polyamide 66 (nylon 66) and PP/nylon 66 immiscible blends containing 5wt% TiO2nanoparticles were prepared via melt compounding. The influences of TiO2on the rheology of nanocomposites and blend nanocomposites were investigated. Scanning electron microscopy results revealed the size of inclusion phase was smaller in PP/PA 66/TiO275/25/5 comparing to the PP/PA 66/TiO225/75/5. A co-continuos phase was observed at 50/50 composition. Melt dynamic rheology showed that the moduli of the PP increased with incorporation of TiO2nanoparticles at the moderate frequencies, while this effect was reverse in PA 66 nanocomposite. Several rheological and rheo-morphological models were used for prediction of rheological parameters. The well-known models for rheology of suspensions proposed by Einstein, Roscope and Eilers-van Dijck were successful for prediction of viscosity of PA nanocomposite. Palierne model was fitted to the experimental values especially for the: PP/PA 66/ TiO225/75/5 blend nanocomposite.

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Mohammed, K. J. "Study the effect of CaCO3 nanoparticles on physical properties of biopolymer blend". Iraqi Journal of Physics (IJP) 16, nr 39 (5.01.2019): 11–22. http://dx.doi.org/10.30723/ijp.v16i39.97.

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Chitosan (CH) / Poly (1-vinylpyrrolidone-co-vinyl acetate) (PVP-co-VAc) blend (1:1) and nanocomposites reinforced with CaCO3 nanoparticles were prepared by solution casting method. FTIR analysis, tensile strength, Elongation, Young modulus, Thermal conductivity, water absorption and Antibacterial properties were studied for blend and nanocomposites. The tensile results show that the tensile strength and Young’s modulus of the nanocomposites were enhanced compared with polymer blend [CH/(PVP-co-VAc)] film. The mechanical properties of the polymer blend were improved by the addition of CaCO3 with significant increases in Young’s modulus (from 1787 MPa to ~7238 MPa) and tensile strength (from 47.87 MPa to 79.75 MPa). Strong interfacial bonding between the CaCO3 nanoparticles and the [CH/(PVP-co-VAc)), homogenous distribution of the nanoparticles in the polymer blend, are assistance of noticeably raised mechanical durability. The thermal conductivity of the polymer blend and CaCO3 nanocomposite films show that it decreased in the adding of nanoparticle CaCO3. The solvability measurements display that the nanocomposite has promoted water resistance. The weight gain lowered with the increase of nano CaCO3. Blending chitosan CH with (PVP-co-VAc) enhanced strength and young modules of the nanocomposites and increased the absorption of water because hydrophilic of the blended polymers films. The effect of two types of positive S.aurous and negative E. coli was studied. The results showed that the nanocomposites were effective for both types, where the activity value ranged from (12 ~ 21). The best results were found for S.aurous bacteria.

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Thomas, Saliney, Shaji Thomas, Sujit A. Kadam, Thomasukutty Jose, Jiji Abraham, Soney C. George i Sabu Thomas. "Multiwalled carbon nanotubes reinforced flexible blend nanocomposites membranes for pervaporation separation of aromatic-aliphatic mixtures". Polymers and Polymer Composites 30 (styczeń 2022): 096739112110690. http://dx.doi.org/10.1177/09673911211069009.

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Multiwalled carbon nanotubes (MWCNT) reinforced NR-NBR blend nanocomposite membranes were prepared and potentially employed for the pervaporation separation of aliphatic – aromatic mixtures. For a 50 wt% benzene feed, the blend nanocomposite membranes had a total flux of 1.265 kgm−2h−1 and separation factor of 1.59 at room temperature. The blend membranes exhibited aromatic selectivity for the separation of aromatic – aliphatic mixtures. 2 phr MWCNT/blend nanocomposite membranes exhibited similar trend for the separation of 10 wt% feed toluene mixture. Trasmission electron microscopy (TEM) images of the blend nanocomposites revealed the well dispersion and distribution of MWCNT in the polymer matrix. The well dispersed MWCNT/blend membranes selectively separate aromatic components from aliphatic – aromatic mixtures.

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khanmohammadi, Sina, Ramin Karimian, Mojtaba Ghanbari Mehrabani, Bahareh Mehramuz, Khudaverdi Ganbarov, Ladan Ejlali, Asghar Tanomand i in. "Poly (ε-Caprolactone)/Cellulose Nanofiber Blend Nanocomposites Containing ZrO2 Nanoparticles: A New Biocompatible Wound Dressing Bandage with Antimicrobial Activity". Advanced Pharmaceutical Bulletin 10, nr 4 (9.08.2020): 577–85. http://dx.doi.org/10.34172/apb.2020.069.

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Purpose : In the present study, the poly (ε-caprolactone)/cellulose nanofiber containing ZrO2 nanoparticles (PCL/CNF/ZrO2 ) nanocomposite was synthesized for wound dressing bandage with antimicrobial activity. Methods: PCL/CNF/ZrO2 nanocomposite was synthesized in three different zirconium dioxide amount (0.5, 1, 2%). Also the prepared nanocomposites were characterized by Infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). In addition, the morphology of the samples was observed by scanning electron microscopy (SEM). Results: Analysis of the XRD spectra showed a preserved structure for PCL semi-crystalline in nanocomposites and an increase in the concentrations of ZrO2 nanoparticles, the structure of nanocomposite was amorphous as well. The results of TGA, DTA, DSC showed thermal stability and strength properties for the nanocomposites which were more thermal stable and thermal integrate compared to PCL. The contact angles of the nanocomposites narrowed as the amount of ZrO2 in the structure increased. The evaluation of biological activities showed that the PCL/CNF/ZrO2 nanocomposite with various concentrations of ZrO2 nanoparticles exhibited moderate to good antimicrobial activity against all tested bacterial and fungal strains. Furthermore, cytocompatibility of the scaffolds was assessed by MTT assay and cell viability studies proved the non-toxic nature of the nanocomposites. Conclusion: The results show that the biodegradability of nanocomposite has advantages that can be used as wound dressing.

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Agarwal, Shalini, Y. K. Saraswat i Vibhav K. Saraswat. "Study of Optical Constants of ZnO Dispersed PC/PMMA Blend Nanocomposites". Open Physics Journal 3, nr 1 (26.08.2016): 63–72. http://dx.doi.org/10.2174/1874843001603010063.

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Present research work deals with the optical study of Zinc Oxide (ZnO) dispersed Polycarbonate/Polymethylmethacrylate (PC/PMMA) blend nanocomposites. ZnO nanoparticles have been prepared by simple chemical route and their average size has been confirmed by Transmission Electron Microscopy (TEM). The average particle size of the nanoparticles has been found to be ~11 nm. Formation of PC/PMMA blend nanocomposites has been confirmed by means of X-ray Diffraction (XRD). Absorption spectra, recorded using UV-Visible spectrophotometer, have been used to determine optical constants such as band gap, extinction coefficient, refractive index and real & imaginary part of dielectric constant. It has been found that band gap decreases as ZnO wt% increases in the blend nanocomposites. Lowest band gap has been found for PC25%/PMMA75% with ZnO 3 wt% blend nanocomposite. Increase in refractive index has also been found with increasing ZnO content. These types of blend nanocomposites have applications in UV-shielding and wave guide technologies.

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AlFannakh, Huda, S. S. Arafat i S. S. Ibrahim. "Synthesis, electrical properties, and kinetic thermal analysis of polyaniline/ polyvinyl alcohol - magnetite nanocomposites film". Science and Engineering of Composite Materials 26, nr 1 (28.01.2019): 347–59. http://dx.doi.org/10.1515/secm-2019-0020.

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AbstractPolyaniline-poly vinyl alcohol (PANI-PVA) conducting blends containing 15 wt% aniline were synthesized by in situ polymerization of aniline. Three-phase polymer blended nanocomposites with different contents of magnetite (5, 10 and 15 wt.%) were also synthesized. We measured the current-voltage (I-V) curves for the conducting blend and its magnetite nanocomposite. We also measured their thermal stability, and performed kinetic analysis through thermogravimetric analysis. We observed that the three phase nanocomposites showed enhanced electrical conductivity compared with that of the conductive blend, and no electrical hysteresis. The PVA/PANi blend was more stable above 350∘C and the addition of Fe3O4 enhanced the thermal stability of the conductive blend. The apparent activation energy of the three phase nanocomposites was greater than those of both the pure PVA and PVA/PANi samples. These results suggest that such three phase nanocomposites could be used in a range of applications.

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Kausar, Ayesha, Safia Haider i Bakhtiar Muhammad. "Nanocomposite based on polystyrene/polyamide blend and bentonite". Nanomaterials and Nanotechnology 7 (1.01.2017): 184798041770278. http://dx.doi.org/10.1177/1847980417702785.

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Novel organomodified nanoclay (bentonite) was reinforced in polystyrene, polyamide, and polystyrene/polyamide blend matrix to develop a series of nanocomposites using a solution processing technique. Modification of bentonite nanoclay was performed via an ion-exchange method with l-serine amino acid. Properties of polystyrene/modified bentonite, polyamide/modified bentonite, and polystyrene/polyamide/modified bentonite nanocomposites were studied using Fourier transform infrared spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, and cone calorimetry techniques. A unique honeycomb-like pattern was observed for polystyrene/polyamide blend with 0.5 g modified bentonite content. The morphology analysis revealed a co-continuous structure in which nanoclay particles were trapped. The polystyrene/polyamide/modified bentonite nanocomposite also showed fine improvement in thermal properties of the system, that is, initial decomposition temperature = 309–321°C and maximum weight loss temperature = 390–400°C. Glass transition temperature (351–385°C) of the series was also higher than the polystyrene/modified bentonite and polyamide/modified bentonite series. Increasing nanoclay content decreased the peak heat release rate of polystyrene/polyamide/modified bentonite 0.5 nanocomposite to 145 kW m−2, indicating improvement in nonflammability. Moreover, the blend and nanoclay series possess better flame retardancy than the blend and other nanocomposite series developed.

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Pandey, Pratima, Rajashree Sahoo, Khusbu Singh, Sanghamitra Pati, Jose Mathew, Avinash Chandra Pandey, Rajni Kant i in. "Drug Resistance Reversal Potential of Nanoparticles/Nanocomposites via Antibiotic’s Potentiation in Multi Drug Resistant P. aeruginosa". Nanomaterials 12, nr 1 (30.12.2021): 117. http://dx.doi.org/10.3390/nano12010117.

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Bacteria employ numerous resistance mechanisms against structurally distinct drugs by the process of multidrug resistance. A study was planned to discover the antibacterial potential of a graphene oxide nanosheet (GO), a graphene oxide–zinc oxide nanocomposite (GO/ZnO), a graphene oxide-chitosan nanocomposite (GO–CS), a zinc oxide decorated graphene oxide–chitosan nanocomposite (GO–CS/ZnO), and zinc oxide nanoparticles (ZnO) alone and in a blend with antibiotics against a PS-2 isolate of Pseudomonas aeruginosa. These nanocomposites reduced the MIC of tetracycline (TET) from 16 folds to 64 folds against a multidrug-resistant clinical isolate. Efflux pumps were interfered, as evident by an ethidium bromide synergy study with nanocomposites, as well as inhibiting biofilm synthesis. These nanoparticles/nanocomposites also decreased the mutant prevention concentration (MPC) of TET. To the best of our knowledge, this is the first report on nanomaterials as a synergistic agent via inhibition of efflux and biofilm synthesis.

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Rozprawy doktorskie na temat "Bland- Nanocomposites"

Zhang, Wei. "Controllable growth of porous structures from co-continuous polymer blend". Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39608.

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Due to their large internal surface area, microporous materials have been widely used in applications where high surface activity is desired. Example applications are extracellular scaffolds for tissue engineering, porous substrates for catalytic reaction, and permeable media for membrane filtration, etc. To realize these potential applications, various techniques such as TIPS (thermal induced phase separation), particle leaching, and SFF (solid freeform fabrication) were proposed and investigated. Despite of being able to generate microporous for specific applications, these available fabrication techniques have limitations on controlling the inner porous structure and the outer geometry in a cost-effective manner. To address these technical challenges, a systematic study focusing on the generation of microporous structures using co-continuous polymer blend was conducted. Under this topic, five subtopics were explored: 1) generation of gradient porous structures; 2) geometrical confining effect in compression molding of co-continuous polymer blend; 3) microporous composite with high nanoparticle loading; 4) micropatterning of porous structure; 5) simulation strategy for kinetics of co-continuous polymer blend phase coarsening process.

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WEGRZYN, MARCIN. "Nanocomposites of Multiphase Polymer Blend Reinforced with Carbon Nanotubes: Processing and Characterization". Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/36869.

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This thesis presents the study of nanocomposites based on immiscible polymer blend of polycarbonate and acrylonitrile-butadiene-styrene (PC/ABS) filled with multi-walled carbon nanotubes (MWCNT). The aim is to achieve an improvement of mechanical properties and electrical conductivity of the nanocomposites. In an initial stage, a twin-screw extruder was used to obtain nanocomposites by melt compounding. Three methods of carbon nanotubes addition were studied: direct addition, dilution from a masterbatch and feeding of MWCNT suspension in ethanol. For each method, the influence of nanofiller content and processing parameters on morphology and final properties of the nanocomposite was analyzed. Furthermore, the influence of two types of carbon nanotubes modifications was studied: covalent modification by surface-oxidation (MWCNT-COOH) and non-covalent modification by an addition of surfactant promoting the nanofiller-matrix interactions. A good dispersion of the MWCNT was obtained for masterbatch dilution and suspension feeding. Both methods showed preferential localization of carbon nanotubes in polycarbonate phase (PC). Samples processed by masterbatch dilution showed the 30 % increase of rigidity and a decrease of ductility of PC/ABS for 0.5 wt. % MWCNT. Electrical conductivity was influenced by processing temperature and carbon nanotubes type. The percolation threshold value was 2.0 wt. % for pristine MWCNT and 1.5 wt. % for modified MWCNT-COOH. Better balance of mechanical properties and electrical conductivity was achieved in the samples obtained by the masterbatch route. These properties were studied in a subsequent phase, when the extruded nanocomposite was injection molded in order to obtain a defined geometry.
Wegrzyn, M. (2014). Nanocomposites of Multiphase Polymer Blend Reinforced with Carbon Nanotubes: Processing and Characterization [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/36869
TESIS

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Bock, Thorsten R. "Catalytic phosphonation of high performance polymers and POSS novel components for polymer blend and nanocomposite fuel cell membranes /". [S.l.] : [s.n.], 2007. http://www.freidok.uni-freiburg.de/volltexte/2881.

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Wang, Sheng. "Phosphorus-Containing Polymers, Their Blends, and Hybrid Nanocomposites with Poly(Hydroxy Ether), Metal Chlorides, and Silica Colloids". Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/26789.

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Phosphorus-containing high performance polymers have been extensively studied during the last 10 years. These materials are of interest for a variety of optical and fire resistant properties, as well as for their ability to complex with the inorganic salts. This dissertation has focused on the nature of the phosphonyl group interactions with hydroxyl containing polymers, such as the poly(hydroxy ether)s. These may be considered linear models of epoxy resins and are also closely related to dimethacrylate (vinyl ester) matrix resins that are important for composite systems. It has been shown that bisphenol A poly(arylene ether phosphine oxide/sulfone) homo- or statistical copolymers are miscible with a bisphenol A-epichlorohydrin based poly(hydroxy ethers) (PHE), as shown by dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC), infrared spectroscopy and , solid state cross polarization-magic angle spinning nuclear magnetic resonance (CP-MAS). These measurements illustrate the strong hydrogen bonding between the phosphonyl groups of the copolymers and the pendent hydroxyl groups of the PHE as the miscibility inducing mechanism. Complete miscibility at all blend compositions was achieved with as little as 20 mole% of phosphine oxide units in the poly(arylene ether) copolymer. Replacement of the bisphenol A moiety by other diphenols, such as hydroquinone, hexafluorobisphenol A and biphenol did not significantly affect blend miscibilities. Miscible polymer blends with PHE were also made by blending poly(arylene thioether phosphine oxide), and fully cyclized phosphine oxide containing polyimides based on (prepared from 2,2'-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) and bis(m-aminophenyl) methyl phosphine oxide (DAMPO)) or bis(m-aminophenyl) phenyl phosphine oxide). Additional research has focused on the influence of these materials on the property characteristics of vinyl ester matrix resins and has shown that the concentration of phosphonyl groups controls the homogeneity of both oligomers and the resulting networks. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and fracture toughness measurements further confirmed the qualitative observations. Metal salts, such as CoCl2 and CuCl2 had earlier been demonstrated to form complexes/nanocomposites with phosphorus-containing poly(arylene ethers). It has been possible to prepare transparent films with 100 mol% of metal chlorides, based upon the phosphonyl groups. The films are transparent, unlike the opaque polysulfone control systems. FTIR results suggested the formation of inorganic salt and polymer complexes at low concentrations. TEM showed homogeneous morphology at low concentrations and excellent dispersion even at high mole % of salts. Cobalt materials reinforce the basic poly(arylene ether)s to provide higher modulus values and influence positively the char yield generated after TGA experiments in air. The cobalt salt/BPADA-DAMPO polyimide composites also yield transparent films, implying very small dimensions. Silica-polymer nanocomposites were also produced by mixing commercial silica colloid/N,N-dimethylacetamide (DMAc) fine dispersions (~ 12 nm) with bisphenol A poly(arylene ether phenyl phosphine oxide). The dry films produced by solution casting are transparent and silica colloids are evenly dispersed (~ 12 nm) into the polymer matrix as shown by TEM. These nanocomposites increased char yield compared with the polymer control, suggesting their fire retardant character. In comparison, the silica/polysulfone hybrid films prepared by the same methods were opaque and the char yield was not improved. This different phase behavior has been explained to be due to the hydrogen bonding between phosphonyl groups and silanol hydroxyl groups on the surface of the nanosilica.
Ph. D.

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Holliday, Nathan. "Processing and Properties of SBR-PU Bilayer and Blend Composite Films Reinforced with Multilayered Nano-Graphene Sheets". University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1458300045.

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Blanchard, Anthony. "Amélioration des propriétés barrière d'un copolymère EVOH par les approches nanocomposites et mélanges de polymères : relations structure-morphologie-propriétés". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1349.

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L’EVOH est un copolymère thermoplastique semi-cristallin composé de segments de polyéthylène et d’alcool polyvinylique de proportion variable. Grâce notamment à une importante densité d’énergie cohésive lui conférant d’excellentes propriétés barrière à l’oxygène et aux arômes en condition anhydre, ce matériau est aujourd’hui largement utilisé dans l’élaboration d’emballages alimentaires multicouches. Sa grande sensibilité à l’eau, provoquant une détérioration importante des propriétés du matériau en conditions hydratées, reste cependant la principale problématique liée à son utilisation actuelle. Dans ce contexte, les travaux ont dans un premier temps porté sur la compréhension approfondie du comportement d’hydratation de l’EVOH afin de mettre en évidence des relations propriétés-structure, ce qui n’avait pas été réalisé jusqu’à présent. Deux axes de recherches ont ensuite été développés dans le but d’améliorer les propriétés barrière du matériau aussi bien à l’état anhydre qu’à l’état hydraté, tout en conservant une bonne transparence et une tenue mécanique correcte: le mélange de polymère d’une part, et l’approche nanocomposite d’autre part. Le choix de la voie fondu, procédé de mise en œuvre peu décrit dans la littérature pour ces systèmes, et celui des charges ont été guidés par la possibilité de transposer facilement les études à l’échelle industrielle
EVOH is a semi-crystalline thermoplastic copolymer composed of polyethylene and polyvinyl alcohol segments in various contents. Thanks to an important cohesive energy density leading to excellent oxygen and food aromas barrier properties in anhydrous state, this material is currently widely used in the elaboration of multilayer food packaging. Its high moisture sensitivity, causing an important deterioration of the properties of the material in hydrated conditions, still constitutes the main inconvenient for its current use. In this context, the studies were firstly focused on the detailed comprehension of the hydration behavior of EVOH in order to underline properties-structure relations, which was still unrealized. Two research axes were then developed in order to improve the barrier properties of the material in both dry and hydrated states, while remaining mechanical behavior and transparency stable: the polymers blend, on the one hand, and the nanocomposite approach on the other hand. The choice of the melting way, rarely described in the literature for these systems, and the one of the fillers nature were dictated by the possibility to easily transpose the experiments to an industrial scale

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Levchenko, Volodymyr. "Morphologie et propriétés électrophysiques de nanocomposites à base de polymères thermoplastiques et de nanotubes de carbone". Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00862137.

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La thèse détermine les principaux paramètres de la formation des structures de la phase conductrice de nanocomposites polymères chargés avec des nanotubes de carbone (NTC) ou des nanocharges combinées, pour étudier l'influence de la morphologie de la structure hétérogène du composite et l'interaction des nanocharges sur les propriétés électriques, thermophysiques et mécaniques des composites. Les trois types de systèmes polymères ont été étudiés, à savoir: 1) les systèmes ségrégés avec distribution ordonnée de nanocharges, 2) les mélanges polymère conducteur; 3) les composites avec des charges binaires où les nanotubes de carbone ont été combinés avec des composés organo-argileux modifiés (MOC) dans un cas et des nanoparticules métalliques d'autre part. Les résultats sur les composites polymères ségrégés chargés avec des NTC ont montré que dans de tels systèmes, la charge conductrice crée un réseau continu conducteur au sein de la matrice polymère. Cela conduit à un seuil de percolation ultra faible avec la valeur de φc~0,045vol.%. Il a été démontré que les systèmes conducteurs à base de mélanges de polymères ont un seuil de percolation inférieur en raison d'effet de double percolation. Il a été constaté que l'introduction simultanée de composés MOC et de NTC dans la matrice thermoplastique permet une meilleure répartition des nanotubes de carbone, ce qui empêche leur agrégation. Il en résulte une diminution du seuil de percolation des composites. Il a été démontré que la formation de la phase conductrice est plus efficace avec des charges mixtes CNT/nanométal en comparaison avec les charges individuelles

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紘宜, 松本, i Koki Matsumoto. "二軸押出機を用いたナノコンポジットの分散混合に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13071692/?lang=0, 2018. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13071692/?lang=0.

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Banerjee, Ritima. "Studies on the foaming behaviour of sebs based blends and nanocomposites". Thesis, 2018. http://localhost:8080/xmlui/handle/12345678/7681.

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(8676840), Sung Ho Yook. "Anisotropic Polymer Blend and Gel Nanocomposites Using External Electric or Magnetic Fields". Thesis, 2020.

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In this dissertation, new ways for controlling the internal structures of a system of polymer composites, polymer blends, and hydrogel composites by means of external electric or magnetic fields are presented. The first part of this study addresses the development of an anisotropic phase-separated morphology in polymer blends by using electrically pre-oriented clay particles. It was observed that electrically pre-oriented montmorillonite clay particles in a homogenous single-phase blend lead to anisotropic phase-separated morphology of the blends, undergoing demixing upon temperature shift to a two-phase regime. The initial co-continuous microstructure developed into a coarsened and directionally organized phase-separated morphology parallel to the direction of oriented clay particles (applied AC electric field direction) over the annealing time. It was also found that the degree of clay orientation under AC electric field was linearly proportional to the degree of polymer-phase orientation. The temporal morphological evolution was thoroughly analyzed by electron microscopy and X-ray diffraction studies. The second part of the study covers anisotropic hydrogel nanocomposites developed by orienting magnetically sensitive nontronite clay minerals under the strong magnetic fields. Anisotropic hydrogel nanocomposites were formed by magnetic-field assisted orientation of nontronite clays suspended in a hydrogel precursor solution followed by a gelation process. The degree of orientation of nontronite minerals was quantitively characterized by birefringence and small-angle X-ray scattering. The resultant hydrogels exhibited anisotropic optical, mechanical, and swelling properties along the direction of oriented clay minerals. Anisotropic water swelling behaviors can be particularly applied in medical dressing materials, where vertical wicking of fluid into the wound dressing is sought after for minimizing periwound maceration damage.

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Książki na temat "Bland- Nanocomposites"

Thomas, Sabu, Maciej Jaroszewski i Ajitha A. R. Polymer Blend Nanocomposites for Energy Storage Applications. Elsevier, 2023.

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James, Jose, Sabu Thomas i Hanna J. Maria. Polymer Blend Nanocomposites and IPNS: Interfacial Characteristics. de Gruyter GmbH, Walter, 2022.

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Thomas, Sabu, Maciej Jaroszewski i Ajitha A. R. Polymer Blend Nanocomposites for Energy Storage Applications. Elsevier, 2023.

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James, Jose, Sabu Thomas i Hanna J. Maria. Polymer Blend Nanocomposites and IPNS: Interfacial Characteristics. de Gruyter GmbH, Walter, 2022.

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James, Jose, Sabu Thomas i Hanna J. Maria. Polymer Blend Nanocomposites and IPNS: Interfacial Characteristics. de Gruyter GmbH, Walter, 2022.

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Design and Applications of Nanostructured Polymer Blend and Nanocomposite Systems. Elsevier Science & Technology Books, 2015.

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Części książek na temat "Bland- Nanocomposites"

Sandhya, P. K., M. S. Sreekala i Sabu Thomas. "Biopolymer-Based Blend Nanocomposites". W Handbook of Biopolymers, 1–28. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6603-2_20-1.

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Sandhya, P. K., M. S. Sreekala i Sabu Thomas. "Biopolymer-Based Blend Nanocomposites". W Handbook of Biopolymers, 551–77. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-0710-4_20.

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Nayak, Ganesh Chandra, i Chapal Kumar Das. "LCP Based Polymer Blend Nanocomposites". W Liquid Crystalline Polymers, 251–72. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22894-5_8.

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Mene, Ravindra U., Ramakant P. Joshi, Vijaykiran N. Narwade, K. Hareesh, Pandit N. Shelke i Sanjay D. Dhole. "Polymeric Blend Nano-Systems for Supercapacitor Applications". W Polymer Nanocomposites in Supercapacitors, 189–220. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003174646-11.

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Davoodabadi, Maliheh, Marco Liebscher, Massimo Sgarzi, Leif Riemenschneider, Daniel Wolf, Silke Hampel, Gianaurelio Cuniberti i Viktor Mechtcherine. "Electrical and Sulfate-Sensing Properties of Alkali-Activated Nanocomposites". W Lecture Notes in Civil Engineering, 285–96. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_29.

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AbstractWe investigated the formation of the conductive network of carbon nanotubes (CNTs) in alkali-activated nanocomposites for sulfate-sensing applications. The matrix was a one-part blend of fly ash and ground granulated blast-furnace slag, activated by sodium silicate and water. Sodium dodecylbenzenesulfonate was used as the surfactant for dispersion of the CNTs in the aqueous media. The nanocomposites were investigated by a laboratory-developed setup to study the electrical and sensing properties of the alkali-activated material. The electrical properties (i.e., conductivity) were calculated and assessed to discover the percolation threshold of the nanocomposites. Furthermore, the sensing behavior of nanocomposites was studied upon sulfate ($${\mathrm{SO}}_{4}^{2-}$$ SO 4 2 - ) exposure by introduction of sulfuric acid ($$({\mathrm{H}}_{2}{\mathrm{SO}}_{4})$$ ( H 2 SO 4 ) ) and magnesium sulfate ($${\mathrm{MgSO}}_{4}$$ MgSO 4 ). The sensors were able to preliminarily exhibit a signal difference based on the introduced media ($${\mathrm{H}}_{2}{\mathrm{SO}}_{4} \&\mathrm{ Mg}{\mathrm{SO}}_{4}$$ H 2 SO 4 & Mg SO 4 ), CNT content and $${\mathrm{H}}_{2}{\mathrm{SO}}_{4}$$ H 2 SO 4 volumetric quantity. The results of this research demonstrated a sensing potential of CNT alkali-activated nanocomposites and can be applied in the concrete structural health monitoring.

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Huang, Chongwen, i Wei Yu. "Rheology And Processing of Nanoparticle Filled Polymer Blend Nanocomposites". W Rheology and Processing of Polymer Nanocomposites, 491–550. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781118969809.ch15.

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Yuhana, Nor Yuliana. "Ternary System of Epoxy/Rubber Blend Clay Nanocomposite". W Handbook of Epoxy Blends, 339–70. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-40043-3_5.

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Yuhana, Nor Yuliana. "Ternary System of Epoxy/Rubber Blend Clay Nanocomposite". W Handbook of Epoxy Blends, 1–32. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-18158-5_5-1.

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Arif, P. Mohammed, Jemy James, Jiji Abraham, K. Nandakkumar i Sabu Thomas. "Double Percolating EMI Shielding Materials Based on Polymer Blend Nanocomposites". W Advanced Materials for Electromagnetic Shielding, 393–408. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119128625.ch17.

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Samal, S. K., S. Mohanty i S. K. Nayak. "Fabrication and Characterization of Polypropylene/Ethylene-Octene Copolymer Blend Nanocomposites". W Advanced Materials and Processing IV, 267–70. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-466-9.267.

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Streszczenia konferencji na temat "Bland- Nanocomposites"

Mallick, Shoaib, Zubair Ahmad i Farid Touati. "Polymer Nanocomposite-based Moisture Sensors for Monitoring of the Water Contents in the Natural Gas Pipelines". W Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0073.

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In this study, the polymer-based humidity sensors were investigated for humidity sensing applications. The key advantages of polymers that have garnered this attraction are their lightweight, easy preparation, and low cost of both materials and fabrication process. Different techniques are used to enhance the surface morphology and sensitivity of polymeric films, which include synthesis of nanocomposites, copolymerization techniques, and blending of polymers. The incorporation of nanoparticles to the polymer matrix improves the electrical and mechanical properties of the polymeric film. We have investigated different polymer nanocomposites based humidity sensors on enhancing the sensitivity of the sensor, on achieving faster response and recovery time and lower hysteresis loss as compared to the polymeric humidity sensors. In the first phase, we investigated the PLA-TiO2 nanocomposite for humidity sensing applications. We have optimized the concentration of TiO2 in the PLA-TiO2 nanocomposite and apply acetone for the surface treatment of the sensing film. In the second phase, we studied the PVDF-TiO2 nanocomposite-based humidity sensor, achieved a linear response of the sensor, and optimized the concentration of PVDF. In the third phase, we incorporated the BaTiO3 nanoparticles within optimized PVDF and studied the dielectric property of the nanocomposite film. PVDF-BaTiO3 sensors show a smaller hysteresis response. In the 4th phase, we blend the PVDF with SPEEK polymer; the optimized concentration of SPEEK improves the sensitivity of the humidity sensors at a lower humidity level.

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Ji, Yali, Isaac Rodriguez i Gary L. Bowlin. "Electrospinning of Chitin Whisker-Reinforced Nanocomposite Fibrous Scaffolds". W ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80104.

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Chitin is the second most abundant biopolymer next to cellulose and possesses many favorable properties such as non-toxicity, high crystallinity, biocompatibility and biodegradability. Acid-treatment of chitin can dissolve regions of low lateral order, resulting in elongated rod-like nanocrystals, termed “whiskers”. Chitin whiskers (CWs) are an emerging and novel nanofiller that have been shown to bring about reinforcing effects on both synthetic and natural polymeric structures. The biocompatibility and biodegradability also make it one of the most promising fillers.1 However; it was thought that CWs can only well disperse in aqueous solution, and poorly disperse in organic solvents, which to some extent restricts the development of CW-based nanocomposites. In a previous study, we found that the CW can be well dispersed in 1,1,1-trifluoroethanol (TFE) solvent which is a good solvent for commonly used biodegradable polymers such as polycaprolactone (PCL), polylactide (PLA) and polydioxanone (PDO). Thus, it is possible to blend CWs with these biopolymers to prepare nanocomposite scaffolds. Electrospinning is a rather simple and promising technique to fabricate scaffolds, since the resulting microstructures are similar to the extracellular matrix (ECM) with potential facilitate the design of surgical implants and promote tissue regeneration. Thus, the focus of this work was to develop CW-reinforced nanocomposite fiber scaffolds via electrospinning and investigate their mechanical and biological properties, expecting them to be potential candidates for bone tissue engineering applications.

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Zhao, Jun-Feng, i Han-Xiong Huang. "Migration of Nanoclay in PP/PS Blend and Effect of Its Localization on Cell Structure". W ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68660.

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In this work, the migration of clay in polypropylene/polystyrene (PP/PS) blend and the effect of its final localization on cell structure of microcellular foamed blend nanocomposites were studied. To observe the clay migration, a multilayered blend, alternatively superposed PS and PP/clay films with a thickness of 0.2 mm, was subjected to low shear flow. Batch foaming was performed on obtained blend nanocomposites to study the influence of the nanoclay localization on cell structure by using CO2 as the foaming agent. When subjected to flow, most clay dispersed in PP phase migrated into PS gradually. The migration of nanoclay caused smaller mean cell diameter and higher cell density to foamed PS. With the reduction of nanoclay content in PP phase, the cell density of PP foam decreased due to the reduction of heterogeneous nucleation sites and the mean cell diameter became smaller.

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Singh, R., A. Indolia i M. S. Gaur. "Preparation and characterization of polymer blend nanocomposites". W 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2012. http://dx.doi.org/10.1109/icpadm.2012.6318946.

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Huang, Han-Xiong, Xiao-Hui Sun i Jian-Kang Wang. "Effect of Nano-Particles on Cellular Structure of Foamed PP-HDPE Blend Using Supercritical Fluid". W ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43906.

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Microcellular foaming of general polypropylene (PP) is a hot subject, but there are some difficulties in its foaming due to its low melt strength, narrow foaming temperature window, and so on. This work attempted to the improvement of PP microcellular foaming by adding nano-montmorillonite and nano-calcium carbonate into PP-high-density polyethylene (HDPE) blend. The nanocomposites were prepared using a twin-screw extruder. The foaming was carried out by a batch process with supercritical carbon dioxide as a blowing agent. Microstructure of the nanocomposites was examined using transmission electron microscopy. The cellular structure of foams was examined using a scanning electron microscope. The effects of nano-particle concentration and type on the cellular structure, cell density, cell diameter, and sample density were investigated. The results showed that the main factor controlling the cellular structure of foamed nanocomposites is the distribution of nano-particles.

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Guastavino, F., L. Della Giovanna, E. Torello, M. Hoyos i P. Tiemblo Magro. "Electrical treeing in LDPE-EVA blend based nanocomposites". W 2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP 2014). IEEE, 2014. http://dx.doi.org/10.1109/ceidp.2014.6995879.

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Kadhim, Bahjat B., Ridha H. Risan, Auday H. Shaban i Kareem A. Jasim. "Electrical characteristics of nickel/epoxy - Unsaturated polyester blend nanocomposites". W XIAMEN-CUSTIPEN WORKSHOP ON THE EQUATION OF STATE OF DENSE NEUTRON-RICH MATTER IN THE ERA OF GRAVITATIONAL WAVE ASTRONOMY. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5116989.

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Zicans, Janis, Remo Merijs Meri, Tatjana Ivanova, Rita Berzina, Martins Kalnins i Roberts Maksimovs. "Nanoclay modified polycarbonate blend nanocomposites: Calorimetric and mechanical properties". W TIMES OF POLYMERS (TOP) AND COMPOSITES 2014: Proceedings of the 7th International Conference on Times of Polymers (TOP) and Composites. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4876861.

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Guastavino, F., L. Della Giovanna, F. Porcile, E. Torello, P. Tiemblo Magro i M. Hoyos Nunez. "Electrical behavior of nanocomposites based on LDPE-EVA blend". W 2013 IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP 2013). IEEE, 2013. http://dx.doi.org/10.1109/ceidp.2013.6748263.

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Zhao, Haibin, i Xiangfang Peng. "The Effect of Nanoclay on the Rheological Properties of Polylactic Acid/Polyhydroxybutyrate-Valerate Blends". W ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9223.

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In this article, the effects of nanoclay (CN) on the rheological behavior of polylactic acid (PLA)/polyhydroxybutyrate–valerate (PHBV) blends was investigated. The rheological behavior of PLA/PHBV blends showed a Newtonian plateau that converted to strong shear thinning behavior over the full range of frequency by the incorporation of nanoclay. The results indicate that the storage modulus and complex viscosity of PLA/PHBV blends were sensitive to nanofillers. An obvious pseudo-solid-like behavior over a wide range of frequency in PLA/PHBV/CN nanocomposites showed that the strong interaction between the PLA/PHBV blend and the nanoclay restricted the relaxation process of the polymer chains. Therefore, the PLA/PHBV/CN nanocomposites possess a higher modulus and greater melt strength, which are desirable for creating an improved foamed structure when manufactured via microcellular injection molding.

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