Exploració per tema "Nanocomposites"

Ara es mostren els items 20-39 de 40

    • Melt Electrospinning of Polymer: Additives, Nanocomposites and Blending 

      Bachs Herrera, Anna (Universitat Politècnica de Catalunya, 2020-10-26)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Instituto Politecnico do Porto
      En l’última dècada, s’ha desenvolupat el melt electrospinning com a un procés ecològic i lliure de dissolvent per disminuir la bretxa entre els avantatges que presenta l’electrospinning en solució i la necessitat d’una ...

    • Micro-molding with ultrasonic vibration energy: New method to disperse nanoclays in polymer matrices 

      Planellas Oates, Marc; Sacristan, Matias; Rey, Lorena; Olmo Osuna, Cristian; Aymami Bofarull, Juan; Casas Becerra, María Teresa; Valle Mendoza, Luis Javier del; Franco García, María Lourdes; Puiggalí Bellalta, Jordi (2014-07)
      Article
      Accés restringit per política de l'editorial
      Ultrasound technology was proved as an efficient processing technique to obtain micro-molded specimens of polylactide (PLA) and polybutylene succinate (PBS), which were selected as examples of biodegradable polyesters ...

    • Nanoclay effect into the biodegradation and processability of poly(lactic acid) nanocomposites for food packaging 

      Oliver Ortega, Helena; Vandermoortele, Victor; Bala, Alba; Julian, Fernando; Méndez González, José Alberto; Espinach, Francesc Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2021-08-16)
      Article
      Accés obert
      One of the most promising expectations in the design of new materials for food packaging is focused on the development of biodegradable systems with improved barrier character. In this sense PLA reinforced with nanoclay ...

    • Nanocomposites materials of PLA reinforced with nanoclays using a masterbatch technology: a study of the mechanical performance and its sustainability 

      Oliver Ortega, Helena; Tresserras, Josep; Julian, Fernando; Alcalà, Manel; Bala, Alba; Espinach, Francesc Xavier; Méndez González, José Alberto (Multidisciplinary Digital Publishing Institute (MDPI), 2021-06-29)
      Article
      Accés obert
      Packaging consumes around 40% of the total plastic production. One of the most important fields with high requirements is food packaging. Food packaging products have been commonly produced with petrol polymers, but due ...

    • Non-isothermal cure and exfoliation of tri-functional epoxy-clay nanocomposites 

      Shiravand, Fatemeh; Hutchinson, John M.; Calventus Solé, Yolanda (Budapest University of Technology and Economics, 2015)
      Article
      Accés obert
      The non-isothermal cure kinetics of polymer silicate layered nanocomposites based on a tri-functional epoxy resin has been investigated by differential scanning calorimetry. From an analysis of the kinetics as a function ...

    • Nucleation and antinucleation effects of functionalized carbon nanotubes on cyclic and linear Poly(e-caprolactones) 

      Perez, Ricardo A.; Lopez, Juan V; Hoskins, Jessica N.; Zhang, Boyu; Grayson, Scott M.; Casas Becerra, María Teresa; Puiggalí Bellalta, Jordi; Muller, Alejandro J. (American Chemical Society (ACS), 2014-06-10)
      Article
      Accés restringit per política de l'editorial
      Novel nanocomposites were prepared by blending linear or cyclic poly(e-caprolactones) with two types of chemically modified carbon nanotubes (CNTs). The low-polydispersity cyclic PCL samples (C-PCLs) were synthesized by ...

    • Obtaining of a PET-CaF2 hybrid multifilament: non-isothermal crystallization studies 

      Riba Moliner, Marta; Mijas Vélez, Gabriela Dayana; Sánchez-Loredo, María Guadalupe; Cayuela Marín, Diana (Elsevier, 2020-02)
      Article
      Accés obert
      Poly(ethylene terephthalate) (PET) has been mixed with fluorite (CaF2) particles to obtain micro- and nanocomposites aiming to obtain a hybrid multifilament. In first term, the use of two montanic waxes and an amide wax ...

    • Orientation of polylactic acid–chitin nanocomposite films via combined calendering and uniaxial drawing: Effect on structure, mechanical, and thermal properties 

      Singh, Shikha; Kumar Patel, Mitul; Geng, Shiyu; Teleman, Anita; Herrera, Natalia; Schwendemann, Daniel; Maspoch Rulduà, M. Lluïsa; Oksman, Kristiina (2021-12-06)
      Article
      Accés obert
      The orientation of polymer composites is one way to increase the mechanical properties of the material in a desired direction. In this study, the aim was to orient chitin nanocrystal (ChNC)-reinforced poly(lactic acid) ...

    • PLA/SiO2 composites: influence of the filler modifications on the morphology, crystallization behaviour and mechanical properties 

      Bin Raja-Nazri, Raja Nazrul Hakim; Cailloux, Jonathan; Santana Pérez, Orlando Onofre; Bou Serra, Jordi; Sánchez Soto, Miguel; Odent, Jeremy; Raquez, Jean-Marie; Dubois, Philippe; Carrasco Alonso, Félix Ángel; Maspoch Rulduà, M. Lluïsa (Wiley, 2017-06-14)
      Article
      Accés obert
      Films of an architecturally modified poly(lactic acid) (PLAREx) with three different types of fumed silica nanofillers (SiO2) were processed through reactive extrusion-calendering in a pilot plant. The effects of the SiO2 ...

    • Preparation and characterization of electrically conductive foams made of Polyethermide (PEI) filled with graphene nanoparticles 

      Abbasi, Hooman (Universitat Politècnica de Catalunya, 2014-07-09)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      The aim of this study is to develop a novel multi-functional polymer nanocomposite for potential usage in aerospace. It is based on facile approach to produce microcellular PEI based foams reinforced with graphene nanoplatlets ...

    • Preparation and Characterization of PMMA/CNF nanocomposite 

      Ramón Moreno, Marc (Universitat Politècnica de Catalunya, 2019-09-04)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Les Nanofibres de cel·lulosa (NFC) són nanomaterials cel·lulòsics transparents i vermiformes que exhibeixen una superfície remarcable, així com una amplària nanomètrica que proporciona innombrables propietats reològiques ...

    • Preparation of micro-molded exfoliated clay nanocomposites by means of ultrasonic technology 

      Díaz Andrade, Angélica María; Franco García, María Lourdes; Casas Becerra, María Teresa; Valle Mendoza, Luis Javier del; Aymami Bofarull, Juan; Olmo Osuna, Cristian; Puiggalí Bellalta, Jordi (2014-10-15)
      Article
      Accés restringit per política de l'editorial
      Ultrasound micro-molding technology has been tested as a new method to get polymer/clay nanocomposites. Biodegradable polylactide (PLA) and poly (nona-methylene azelate) (PE99) have been used as polymer matrices, whereas ...

    • Properties of poly(lactic acid) in presence of cellulose and chitin nanocrystals 

      Singh, Shikha (2020-10-09)
      Tesi
      Accés obert
      Plastic based materials are widely used for packaging applications. However, disposal of such petroleum-based materials e.g. polyethylene (PE) and polypropylene (PP) has become a huge threat to the environment due to its ...

    • Recent advances in carbon-based polymer nanocomposites for electromagnetic interference shielding 

      Abbasi, Hooman; Antunes, Marcelo de Sousa Pais; Velasco Perero, José Ignacio (2019-06)
      Article
      Accés obert
      Carbon-based nanoparticles have recently generated a great attention, as they could create polymer nanocomposites with enhanced transport properties, overcoming some limitations of electrically-conductive polymers for high ...

    • Research on the strengthening advantages on using cellulose nanofibers as polyvinyl alcohol reinforcement 

      Tarrés Farrés, Joaquim Agustí; Oliver Ortega, Helena; Alcalà, Manel; Espinach, Francesc Xavier; Mutjé Pujol, Pere; Delgado-Aguilar, Marc (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-22)
      Article
      Accés obert
      The present work aims to combine the unique properties of cellulose nanofibers (CNF) with polyvinyl alcohol (PVA) to obtain high-performance nanocomposites. CNF were obtained by means of TEMPO-mediated ((2,2,6,6-Tetramet ...

    • Structural transitions of nylon 47 and clay influence on its crystallization behavior 

      Morales Gámez, Laura Teresa; Casas Becerra, María Teresa; Franco García, María Lourdes; Puiggalí Bellalta, Jordi (2013-06)
      Article
      Accés restringit per política de l'editorial
      Basic diffraction data on nylon 47 pointed out a peculiar structure of hydrogen bonds along two directions. Nylon 47 showed reversible polymorphic transitions during heating/cooling processes that were analyzed by real ...

    • Study of nanocomposites prepared from polyamides and biodegradable polyesters and poly(ester amide)s 

      Morales Gámez, Laura Teresa (Universitat Politècnica de Catalunya, 2012-01-23)
      Tesi
      Accés obert
      Polymer clay nanocomposites of polyamides and biodegradable polymers with three kinds of organomodified clays were prepared by different techniques (in situ polymerization, solution casting, and melt mixing). The polymers ...

    • The application of thermal analysis to the study of epoxy–clay nanocomposites 

      Hutchinson, John M. (Springer, 2016-08)
      Article
      Accés obert
      The development of polymer layered silicate (PLS) nanocomposites goes back over 20 years now, and yet they still have not achieved their full potential. A principal reason for this is the difficulty of obtaining a truly ...

    • Thermal analysis of polymer layered silicate nanocomposites. Identification of nanostructure development by DSC 

      Shiravand, Fatemeh; Fraga Rivas, Iria; Cortés Izquierdo, María Pilar; Calventus Solé, Yolanda; Hutchinson, John M. (2014-11-01)
      Article
      Accés restringit per política de l'editorial
      It has been shown, for three different polymer layered silicate (PLS) nanocomposite systems, how differential scanning calorimetry (DSC) can identify the different reactions of homopolymerisation and of crosslinking that ...

    • Thermally Switching On/Off the Hardening of Soaked Nanocomposite Materials 

      Pérez Madrigal, Maria del Mar; O'Reilly, Rachel K. (2017-08-23)
      Article
      Accés obert
      The area of smart materials is a hot topic as it allows access to adaptive/responsive materials with self-healing, shape memory, or actuation behavior. Indeed, scientists can make all manner of materials on-scale with ...