A5033891064- Carbon Nanotubes in Composites
- Advanced Sensor and Energy Harvesting Materials
- Smart Materials for Construction
- Conducting polymers and applications
- Graphene research and applications
- Mechanical Behavior of Composites
- Cellular and Composite Structures
- Structural Analysis of Composite Materials
- Fiber-reinforced polymer composites
- Composite Structure Analysis and Optimization
- Force Microscopy Techniques and Applications
- Nanotechnology research and applications
- Mechanical and Optical Resonators
- Copper Interconnects and Reliability
- Metal and Thin Film Mechanics
- Polymer Nanocomposites and Properties
- Boron and Carbon Nanomaterials Research
- Advanced MEMS and NEMS Technologies
- Thermal properties of materials
- Polymer Foaming and Composites
- Textile materials and evaluations
- Polymer composites and self-healing
- Concrete Corrosion and Durability
- Ultrasonics and Acoustic Wave Propagation
- Microfluidic and Bio-sensing Technologies
Secretaría de Investigación, Innovación y Educación Superior
2016-2025
Yuba City Unified School District
2022
Material (Belgium)
2007-2022
Autonomous University of Yucatán
2012-2016
Florida Atlantic University
2005-2006
Instituto Politécnico Nacional
2003-2005
Center for Research and Advanced Studies of the National Polytechnic Institute
2003-2005
Electrical conductivity of 150-200 μm thick polysulfone films loaded with 0.05-0.75%w/w multiwall carbon nanotubes was systematically investigated for two types dispersion states, uniformly dispersed and agglomerated at the micro-scale.The percolation threshold found 0.11% 0.068% w/w films, respectively.Overall, higher than that ones, marked differences 2 to 4 orders magnitude loadings in upper vicinity (0.1-0.3% w/w).The increased state is explained by nanotube-to-nanotube contact after...
Previous and current research on piezoresistivity of polymer composites filled with carbon nanostructures is reviewed. The review covers the use coupled electro‐mechanical response these materials to self‐sense their strain damage during mechanical loading. mechanisms yielding changes in electrical resistance upon loading are first discussed. Published knowledge then summarized, starting framework literature black graphite moving more recent nanotubes, exfoliated graphite, few‐layer graphene...
The dynamics of multiwall carbon nanotube (MWCNT) alignment inside viscous media using electric fields is investigated. Electrical current measurements were performed in situ during the application an field to liquid solutions deionized water or dissolved polymer containing MWCNTs. variation electrical over time was associated MWCNT network formation. influence magnitude and frequency on formation studied. migration towards negative electrode observed when a direct applied, whereas aligned...
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 piezoresistive response of multiwalled carbon nanotube/vinyl ester composites containing 0.3, 0.5 and 1% w/w nanotubes (CNTs) loaded in tension compression is investigated. change electrical resistance (ΔR) under loading was positive showed a linear relationship with the applied strain up to failure, slightly increased sensitivity for decreased CNT content. In compression, nonlinear non-monotonic behavior observed, ΔR initially decreasing elastic regime, leveling off at onset yielding...
The role of the physical properties multiwall carbon nanotubes on strain-sensing piezoresistive behavior nanotube/polymer composites is systematically studied using three types as fillers a brittle thermosetting (vinyl ester) and tough thermoplastic (polypropylene) polymers under quasi-static tensile loading. Two investigated have similar length, aspect ratio, structural ordering, surface area, while third group contains longer with higher ordering. results indicate that ordering yield...
Chemical functionalization of multi-wall carbon nanotubes (MWCNTs) is conducted by means acid oxidation, direct silanization the as-received MWCNTs and a sequential treatment based on oxidation silanization.Polymer composites made from functionalized vinyl ester resin are fabricated tested in compression.It found that although could be achieved without assistance previous oxidative treatment, oxidizing HNO 3 /H 2 O prior to yields significantly better attachment silane molecules CNT surface...
Abstract Multiwall carbon nanotube (MWCNT)/elastomeric composite films were fabricated using two segmented polyurethanes: an in‐house synthesized one (SPU) and a commercial medical grade (Tecoflex®, TF). Electrical, mechanical, electromechanical (piezoresistive) properties of both composites evaluated as function the MWCNT weight concentration (1–10 wt %). An increase in electrical conductivity for types polymers was observed concentrations low 1 %. The MWCNT/TF higher than that achieved...
In uniaxial tension and compression experiments, carbon nanotube (CNT)-polymer nanocomposites have demonstrated exceptional mechanical coupled electrostatic properties in the form of piezoresistivity. order to better understand correlation piezoresistive response with CNT dispersion at mesoscale, a 3D computational multiscale micromechanics model based on finite element analysis is constructed predict effective macroscale CNT/polymer nanocomposites. The key factors that may contribute...