A5073633022- biodegradable polymer synthesis and properties
- Polymer crystallization and properties
- Electrospun Nanofibers in Biomedical Applications
- Polymer Nanocomposites and Properties
- Acupuncture Treatment Research Studies
- Polymer composites and self-healing
- Bone Tissue Engineering Materials
- Additive Manufacturing and 3D Printing Technologies
- Heart Rate Variability and Autonomic Control
- Carbon dioxide utilization in catalysis
- Carbon Nanotubes in Composites
- Thermal and Kinetic Analysis
- Solar Radiation and Photovoltaics
- Orthopaedic implants and arthroplasty
- Cardiovascular Syncope and Autonomic Disorders
- Graphene and Nanomaterials Applications
- Advanced Sensor and Energy Harvesting Materials
- Microplastics and Plastic Pollution
- Conducting polymers and applications
- Tissue Engineering and Regenerative Medicine
- Photovoltaic System Optimization Techniques
- Graphene research and applications
- Parkinson's Disease and Spinal Disorders
- Nerve injury and regeneration
- Polymer Foaming and Composites
Secretaría de Investigación, Innovación y Educación Superior
2014-2024
Autonomous University of Yucatán
2015-2023
Material (Belgium)
2022
University of Minho
2005
Universitat Politècnica de València
2005
Polymeric blends are employed in the production of filaments for additive manufacturing to balance mechanical and processability properties. The thermal properties polymeric made poly (lactic acid) (PLA), polyhydroxyalkanoates (PHA), its blend (PLA-PHA) investigated herein correlated their measured structural physicochemical PLA exhibits highest stiffness tensile strength, but lower toughness. PLA-PHA were similar those PLA, with a significantly higher Despite neat PHA, incorporating small...
The crystallization kinetics of poly(l-lactide), PLLA, is slow enough to allow a quasi-amorphous polymer be obtained at low temperature simply by quenching from the melt. PLLA process was followed differential scanning calorimetry and optical microscopy after nucleation isothermal treatments temperatures just below (53 °C) above (73 glass transition temperature. exotherm shown in heating thermograms shifts toward lower as annealing time 73 °C increases. same effect lesser extent when sample...
Biomaterial scaffolds are a key part of cardiac tissue engineering therapies. The group has recently synthesized novel polycaprolactone based polyurethane-urea copolymer that showed improved mechanical properties compared with its previously published counterparts. aim this study was to explore whether indirect three-dimensional (3D) printing could provide means fabricate novel, biodegradable polymer into scaffold suitable for engineering. Indirect 3D carried out through water dissolvable...
Articular cartilage is a specialized tissue that provides smooth surface for joint movement and load transmission. Unfortunately, it has limited regenerative capacity. Tissue engineering, combining different cell types, scaffolds, growth factors, physical stimulation become an alternative repairing regenerating articular cartilage. Dental Follicle Mesenchymal Stem Cells (DFMSCs) are attractive candidates engineering because of their ability to differentiate into chondrocytes, on the other...
Abstract A series of segmented poly(urethane‐urea) polymers have been synthesized varying the hard segments content, based on combination polycaprolactone diol and aliphatic diisocyanate (Bis(4‐isocyanatocyclohexyl)methane), using diamine (1,4‐Butylenediamine) as chain extender. The microstructure properties material highly depend content (from 14 to 40%). These PUUs with segment above 23% elastomeric behaviors that allow high recoverable deformation. chemical structure hydrogen bonding...
The synthesis, thermal, dielectric and conductivity properties of functionalized chitosan polymer derivatives are evaluated to determine their potential uses as a nontoxic electrolyte/separator for lithium batteries. Deacetylated (DAC) at 97% is used precursor prepare two derivatives: N-propylsulfonic acid (SC), with zwitterionic pendant groups (ZWC). These increase the polar character pure chitosan, significantly improve its solubility. Likewise, they thermally stable up 220 °C, glass...
Abstract A calorimetric study for estimating crosslinking densities of polydimethylsiloxane (PDMS) networks is presented. It involves the experimental determination heat capacities polymer with ( C ) and without crosslinking. The theoretical basis method described as well procedure used p s. PDMS networks, determined by absorbency (swelling) measurments, using Flory‐Rehner equation, here, are compared. PDMS, obtained anionic synthesis octamethylcyclotetrasiloxane, was analyzed gel permeation...
Indices obtained from the second derivative of digital volume pulse waveform have been proposed to characterize vascular aging, arterial rigidity, and effects vasoactive drugs. The purpose this study was assess manual needling PC6 on SD(DVP) indices in healthy untreated hypertensive subjects. AI, B:A, D:A indices, based height wave components SD(DVP), 40 subjects 25 were compared. DVP by measuring infrared light transmission through finger. For each subject, 20-min-long registration...
Nowadays, the use of renewable energy continues growing, particularly solar photovoltaic, due to photovoltaic cells cost reduction and grid connection ability, however a major challenge encourage their use, is rely on method estimate potential generated by at specific location, it important sustain its viability or generation projects in large small scale. The cell conversion efficiency (η) maximum power point (Pmpp), reduced radiation (E) temperature (T) variation, affecting output current...
Carbon nanotube yarns (CNTYs) are outstanding hierarchical fibers with electrical properties that depend on temperature and mechanical stimuli, which makes them attractive as smart materials for sensing applications. In order to better understand the response of CNTYs under a combination dynamic loading variations temperature, their monotonic cyclic tensile response, in situ Raman spectroscopy, hysteresis, analysis (DMA) investigated herein. The piezoresistivity thermoresistivity were...
Paliperidone palmitate 6-monthly (PP6M) is the first long-acting antipsychotic injectable (LAI) to allow for only two medication administrations per year, though there presently limited insight into its effectiveness and potential added value in real clinical practice conditions.To present our ongoing study draw preliminary data on patient characteristics initiating PP6M adherence during year of treatment.The paliperidone 2 (P2Y) a 4-year, multicentre, prospective mirror-image pragmatic...
Abstract The kinetic parameters for the polymerization reactions of two polyurethane systems were determined by using an improved method differential scanning calorymetry (DSC). calculated activation energy, reaction order, and Arrhenius prefactor show good correlation with experimental results. used here shows several improvements as respects to other DSC methods: three can be directly; it is more accurate than methods; requires only one heating rate, during calorimetric experiments,...
Electrospinning has proven to be a suitable technique for the production of small diameter tubes, with diverse applications, in field tissue engineering. In this work, tubular scaffolds were prepared by electrospinning polycaprolactone/polylactic-co-glycolic acid (PLGA) blend and then treated polypyrrole plasma possible application urethral tissue. Scanning electron microscopy micrographs showed that 10% 20% PLGA blend, microfibers, varying diameters, free defects. The elastic modulus was...
This paper presents a practical method for calculating the electrical energy generated by PV panel (kWhr) through MATLAB simulations based on mathematical model of cell, which obtains “Mean Maximum Power Point” (MMPP) in characteristic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>V</mml:mi></mml:mrow></mml:math>-<mml:math id="M2"><mml:mrow><mml:mi>P</mml:mi></mml:mrow></mml:math>curve, response to evaluating historical climate data at specific location....
Abstract Blends of two highly crystalline polymers containing an elastomer were prepared to study the glass transition confined elastomer. The chosen high density poly ethylene (HDPE), polypropylene (PP), and elastomers a different nature: natural number (NR) EPDM. dynamic mechanical analyzer (DMA) technique was used analyze storage modulus blends with content from 0% 30% by weight, remainder made up equal amounts HDPE PP, 10% elastomer, but varied ratios polyolefins. We differentiation...
Abstract Differential scanning calorimetry (DSC) has been utilized in several studies on polymerization kinetics, at different heating rates. However, there are factors affecting the precision of kinetic parameters. In this work, activation energy urethane‐bond formation between 2,6‐tolylene diisocyanate and diethylene glycol is reported, latter being excess order to minimize problems such as thermal transitions incomplete reaction final step. The DSC technique was applied Both equal...