A5079047548- Natural Fiber Reinforced Composites
- Advanced Cellulose Research Studies
- Additive Manufacturing and 3D Printing Technologies
- biodegradable polymer synthesis and properties
- Dyeing and Modifying Textile Fibers
- Polymer Nanocomposites and Properties
- Microplastics and Plastic Pollution
- Electrospun Nanofibers in Biomedical Applications
- Biofuel production and bioconversion
- Recycling and Waste Management Techniques
- Polymer crystallization and properties
- Textile materials and evaluations
- Higher Education Teaching and Evaluation
- Advanced Sensor and Energy Harvesting Materials
- Asphalt Pavement Performance Evaluation
- Innovative concrete reinforcement materials
- Tribology and Wear Analysis
- Adsorption and biosorption for pollutant removal
- Food composition and properties
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- E-Learning and Knowledge Management
- Dye analysis and toxicity
- Innovations in Concrete and Construction Materials
- Occupational Health and Safety in Workplaces
Universitat Politècnica de Catalunya
2013-2024
University of California, San Francisco
2004-2006
University of California, Berkeley
2005
Université Claude Bernard Lyon 1
2004
Centre National de la Recherche Scientifique
2004
Universidad de Cádiz
1999
ABSTRACT Gelatin fibers were prepared by electrospinning of gelatin/acetic acid/water ternary mixtures with the aim studying feasibility fabricating gelatin nanofiber mats at room temperature using an alternative benign solvent significantly reducing acetic acid concentration. The results showed that nanofibers can be optimally electrospun low concentration (25%, v/v) combined concentrations higher than 300 mg/mL. Both solutions and (prepared different aqueous solutions) analyzed Fourier...
The increased environmental presence of micro-/nanoplastics (MNPLs) and the potential health risks associated with their exposure classify them as pollutants special concerns. Consequently, there is an urgent need to investigate secondary MNPLs. In this context, using "true-to-life" MNPLs, resulting from laboratory degradation plastic goods, may be a sound approach. These non-commercial MNPLs must labeled track presence/journeys inside cells or organisms. Because cell internalization...
Abstract With the growing emphasis on decreasing accumulation of used tyres in land fills, there has been significant scientific and technological interest to provide with solutions their recovery reuse. A new composite material based reused tyre powder as reinforcement recycled high‐density polyethylene matrix was studied this work. The effect chemical acidic pretreatments performed rubber particle size behavior were evaluated. Powder resulting from industrial grinding processes separated...
Ethylene Propylene Diene rubber (EPDM), is present in many applications. However, its crosslinked structure makes difficult recycling. The use of devulcanized EPDM, (dEPDM) as a component elastomeric composites, real possibility to reuse EPDM scraps. In this study, three matrices (natural (NR), styrene butadiene (SBR) and rubber) have been tested including recycled component. previously was using thermomechanical process followed by microwave irradiation. resulting blended with the matrixes...
Abstract The lignin and holocellulose of thirty different woods from the northern area Catalonia (Spain) were analyzed in detail by FTIR spectroscopy. Five bands three used to characterize differences between woods. location relative intensities these components could be differentiate hardwoods softwoods. It was also shown that amount crystallized cellulose I for each type wood.
The development of suitable biomimetic scaffolds is a fundamental requirement tissue engineering. Although electrospinning has emerged as an effective method for producing such nanometer-sized fibers, the influence solution characteristics on morphology resulting nanofibers depends each polymer system. In this study, gelatin and microfibers were prepared via using mixtures water acetic acid at different ratios solvents. viscosities solutions before analyzed two behaviors found function...
Four common waste keratin biofibers (human hair, dog chicken feathers, and degreased wool) have been used as biosorbents for the removal of heavy metal ions from aqueous solutions. Different parameters biosorption processes were optimized in batch systems. For multiple-metal systems, consisting a mixture eight [Cr(III), Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Pb(II)], total increased order: wool > feathers human hair hair. From kinetic models tested, pseudo-second-order model...
Properties of composites based on short regenerated cellulose lyocell fibers as a reinforcement and high-density polyethylene (HDPE) matrix were analyzed in this study. The effect the fiber content chemical pre-treatments (silane coupling agent, grafting polymethyl metacrylate, PMMA) composite mechanical physical properties investigated by tensile testing, water absorption test fracture surface microstructure analysis. Mechanical indicated that fiber-reinforced show higher modulus than pure...
Since the beginning of 2020, Peru has been exposed to inevitable spread Covid-19, a highly contagious disease that is increasing around world rapidly. Scientists and researchers propose various solutions mitigate its effects or reduce infections, from simple procedures complex systems such as robots vaccines. For this reason, innovative research was carried out 2020 2021 under supervision school Mechatronics Engineering at U niversidad Tecnologica del Peru, so, article, presents SCARA robot...
Abstract The aim of this study was to determine the influence N ‐isopropyl‐ ′‐phenyl‐ p ‐phenylenediamine (IPPD) antioxidant agent on degradation composites NBR/SiO 2 . inhibition early stages degrading process has been particularly analyzed. Several NBR‐SiO matrix samples with and without IPPD have exposed an oxidizing atmosphere at 140°C for periods between 0 120 h. Besides, alone subject same aging thermo‐oxidizing process. degraded characterized by ATR‐FTIR, TG, SEM. Mechanical...
In order to provide another way of reducing the stock used tyres and polyvinyl chloride waste, a new material is developed studied. Formulation includes matrix constituted by compound recycled with plasticized reinforcement ground tyre rubber. Acoustic mechanical properties different compositions chloride/ground rubber were tested in determine their suitability for applications fulfilling industry requirements. Sound absorption has been analyzed, showing interesting results at frequencies...
This study deals with the preparation and characterization of thermoplastic composites using polypropylene, high-density polyethylene polylactic acid matrices including whole chicken feathers as reinforcement. The behaviour was determined in terms physical mechanical properties, which were related to fibre–matrix compatibility analysed by Fourier transform infrared spectroscopy scanning electron microscopy. results showed that addition into a slight increase stiffness when small amounts...
Human hair is considered a ubiquitous waste product and its accumulation can cause environmental problems. Hence, the search for alternatives that take advantage of this as new raw material interest, contributes to idea circular economy. In study, chemically modified human was used low cost biosorbent removal heavy metal ions from aqueous solutions. The effect contact time, pH, concentration on biosorption process were investigated. Kinetic modeling indicated pseudo-second order kinetic...
The concern about the amounts of used tyres that end in landfills and environmental problems they produce have led to research on ways use these residues common applications. A general starting point recovering procedures is grinding order obtain a powder known as ground tyre rubber (GTR). This paper proposes an alternative way recycling by means new material composed polyolefin matrix, high-density polyethylene (HDPE) reinforced with GTR. crosslinked structure surface characteristics GTR...
The valorisation of chicken feathers waste was researched in this work through the preparation composites using ground as a filler (20% vol/vol) and polypropylene or low-density polyethylene matrices. In order to improve compatibility between matrices, two different strategies were followed: first, by chemical modification either acetylation silanization second, addition adhesion promoters like maleated polyethylene. effect those treatments on physical, mechanical structural properties...