Ma. del Pilar Carreón-Castro

Universidad Nacional Autónoma de México

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Maykel González–Torres

Instituto Nacional de Rehabilitación

R. Rodrı́guez

Universidad Nacional Autónoma de México

Omar G. Morales–Saavedra

Universidad Nacional Autónoma de México

Martín Caldera‐Villalobos

Universidad Autónoma de Coahuila

S. Vargas

Universidad Nacional Autónoma de México

Susana Vargas Muñoz

Autonomous University of Queretaro

J.G. Bañuelos

Universidad Nacional Autónoma de México

Miriam Estévez

Universidad Nacional Autónoma de México

Rosalba Castañeda

Universidad Nacional Autónoma de México

B. Leal-Acevedo

Universidad Nacional Autónoma de México

Cooperative Institutions

Universidad Nacional Autónoma de México

Autonomous University of Queretaro

Universidad Autónoma Metropolitana

Benemérita Universidad Autónoma de Puebla

The University of Texas at El Paso

University of North Texas

Universidad Autónoma de Coahuila

Universidad Autónoma del Estado de Hidalgo

Tecnologie Avanzate (Italy)

Consejo Nacional de Humanidades, Ciencias y Tecnologías

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Tribological and Mechanical Properties of Poly[(R)-3-hydroxybutyric acid] Grafted with Vinyl Compounds: Insight into Possible Application

International Journal of Polymer Analysis and Characterization (2015)

Maykel González‐Torres R. Rodrı́guez S. Vargas Miriam Estévez Ma. del Pilar Carreón-Castro

Biodegradable graft copolymers were prepared by gamma radiation-induced graft polymerization of two vinyl monomers, vinyl acetate and vinyl alcohol, onto poly[(R)-3-hydroxybutyric acid]. Success of the grafting reaction was verified by Fourier-transform infrared and nuclear magnetic resonance spectroscopy. Thermal remolding was used to create membranes from the copolymers. We determined tribological and mechanical properties of the membranes obtained. The lowest elongation at break in tensile testing is seen for P(3HB) and the highest for P(3HB-g-VA). Up to 5 N or so, the highest scratch resistance is exhibited by P(3HB-g-VA). Piezoelectric behavior is seen for P(3HB-g-VA) while P(3HB-g-VAc) and plain P(3HB) showed no electric response. Explanation of the piezoelectric behavior in terms of molecular structures is provided.

Vinyl alcohol

Vinyl acetate

10.1080/1023666x.2015.1036225

Cite

Citations (5)

Langmuir-Blodgett Films of Novel Diacetylene-Containing Polymers with High Second Order Nonlinear Optical Susceptibility

Molecular Crystals and Liquid Crystals (2006)

Ma. del Pilar Carreón-Castro J. G. Murillo Ramírez Margarita Rivera Takeshi Ogawa Yukie Kawazu

ABSTRACT Langmuir-Blodgett films of four polymers containing benzoate and cinnamate main chains and Disperse Red 19 in the side chains were prepared and characterized by means of BAM and AFM. The poly(para-benzoate) and poly(para-cinnamate) gave LB films with much higher ordered textures than the respective meta-polymers. The para-polymers apparently possess self-assembly capacity, and this is thought to be the cause of their high second order nonlinear optical susceptibility. The X-type films of the para-polymers showed second order nonlinear optical responses, suggesting that the para-polymers form self organized membranes with the chromophores orientated to the direction perpendicular to the substrate. Keywords: azo-polymersLB filmsSHG Acknowledgments This work is supported by a grant from DGAPA No. IN102401-3. One of the authors, M. Rivera acknowledges the grant from CONACYT (Project No. 36155-E) for acquisition of the AFM apparatus. Carreón-Castro expresses her thanks to CONACYT (Project No. J200.629/2003) and DGAPA-UNAM (Project No. IN102905). The authors also acknowledge to Antonio Ramírez and José Rangel for their technical assistance.

Diacetylene

Chromophore

Azo compound

Side chain

10.1080/15421400500374898

Cite

Citations (1)

Surface modification of poly(3-hydroxybutyrate- co -3-hydroxyvalerate) by direct plasma-radiation-induced graft polymerization of N-hydroxyethyl-acrylamide

Materials Letters (2016)

Maykel González‐Torres S. Vargas Alicia Del Real Álvaro de Jesús Ruíz-Baltazar Eric Reyes‐Cervantes

Surface Modification

Plasma polymerization

Biomaterial

Morphology

10.1016/j.matlet.2016.04.005

Cite

Citations (7)

Preparation of Fullerene (C₆₀) Based SiO₂ Sonogel Hybrid Composites: UV Laser Induced Photo-Polymerization, Morphological, and Optical Properties

Journal of Nanoscience and Nanotechnology (2008)

Omar G. Morales–Saavedra Rosalba Castañeda J.G. Bañuelos Ma. del Pilar Carreón-Castro

10.1166/jnn.2008.161

Cite

Citations (5)

Radiation-induced graft polymerization of chitosan onto poly(3-hydroxybutyrate)

Carbohydrate Polymers (2015)

Maykel González‐Torres Susana Vargas Muñoz Silvia G. Solís Rosales Ma. del Pilar Carreón-Castro Rodrigo Muñoz

Biocompatibility

Degree of polymerization

10.1016/j.carbpol.2015.07.032

Cite

Citations (26)

Graft-Copolymerization of Acrylate Monomers onto Chitosan Induced by Gamma Radiation: Amphiphilic Polymers and Their Behavior at The Air-Water Interface

Journal of Nuclear Physics Material Sciences Radiation and Applications (2020)

Martín Caldera‐Villalobos B. Leal-Acevedo V.M. Velázquez-Aguilar Ma. del Pilar Carreón-Castro

Graft polymerization induced by ionizing radiation is a powerful tool in materials science to modifying the physical properties of polymers. Chitosan is a biocompatible, biodegradable, antibacterial, and highly hydrophilic polysaccharide. In this work, we report the obtaining of amphiphilic polymers through graft polymerization of acrylic monomers (methyl acrylate, t-butyl acrylate, and hexyl acrylate) onto chitosan. The polymerization reaction was carried out by simultaneous irradiation of monomers and chitosan using a gamma radiation source of 60Co. The formation of Langmuir films of amphiphilic polymers was studied at the air-water interface through surface pressure versus main molecular area isotherms (Π-A) and hysteresis cycles of compression and decompression. Finally, it was analyzed the transferring of Langmuir films towards solid substrates to obtaining Langmuir-Blodgett films with potential application as an antibacterial coating. The microstructure of the Langmuir-Blodgett films was characterized by AFM microscopy observing a regular topography with roughness ranging between 0.53 and 0.6 μm.

Acrylic acid

10.15415/jnp.2020.72027

Cite

Citations (0)

Crystalline and spectroscopic characterization of poly(2-aminoethyl methacrylate hydrochloride) chains grafted onto poly[(R)-3-hydroxybutyric acid]

Vibrational Spectroscopy (2015)

Maykel González‐Torres R. Rodrı́guez Susana Vargas Muñoz Ma. del Pilar Carreón-Castro Eric M. Rivera‐Muñoz

Degree of polymerization

10.1016/j.vibspec.2014.12.003

Cite

Citations (11)

Preparation of Fullerene (C₆₀) Based SiO₂ Sonogel Hybrid Composites: UV Laser Induced Photo-Polymerization, Morphological, and Optical Properties

Journal of Nanoscience and Nanotechnology (2008)

Omar G. Morales–Saavedra Rosalba Castañeda J.G. Bañuelos Ma. del Pilar Carreón-Castro

Fullerene (C 60 ) spheres were successfully embedded by diffusion into a catalyst-free SiO 2 sonogel network. By this method, homogeneous and stable solid state hybrid samples suitable for optical characterization were produced. Due to the high porosity exhibited by the sonogel matrix on the nanometric length-scale, the preparation of several C 60 doped composites with variable dopant concentrations was achieved. The obtained bulk hybrids were irradiated with a pulsed Kr-F laser system in order to induce photo-polymerization of the implanted C 60 guest molecules at optimal experimental conditions established according to the pulsed laser photoacoustic technique (LPAT). The adequate purity level displayed by the sonogel route allowed us to perform optimal optical characterizations of these composites (reference hybrids and photo-polymerized samples) in order to evaluate their photo-physical properties for potential photonic applications. In this work the sonolysis process used to prepare amorphous catalyst-free SiO 2 :C 60 sonogel hybrids and their linear and nonlinear optical (NLO) properties are extensively discussed. UV-VIS absorption-, Photo Luminescent (PL)-, and Raman-spectroscopies in conjunction with nonlinear optical limiting (OL) measurements, gave experimental evidence of the inclusion of C 60 molecules within the sonogel environment, the laser induced photo-polymerization process and the induced changes of the optical and NLO-properties. Results are discussed in combination with atomic force microscopy (AFM) studies in order to explore the surface morphology of these samples.

Hybrid material

10.1166/jnn.2008.18328

Cite

Citations (6)

Simultaneous Grafting of Poly(Acrylic Acid) and Poly(Ethylene Glycol) onto Chitosan using Gamma Radiation: Polymer Networks for Removal of Textile Dyes

Journal of Nuclear Physics Material Sciences Radiation and Applications (2021)

Ma. del Pilar Carreón-Castro Martín Caldera‐Villalobos B. Leal-Acevedo A.M. Herrera

Chitosan is a bio-based polyelectrolyte with high potential for wastewater treatment. Chitosan can remove anionic dyes by adsorption but it has low performance in the removal of cationic dyes. In this work, we report the synthesis of chitosan-based graft-copolymers using gamma radiation. Acrylic acid and poly(ethylene glycol) were grafted successfully onto chitosan applying a radiation dose of 12 kGy at a dose rate of 8 kGyh-1. The grafted-copolymers have improved adsorptive properties for the removal of basic dyes reaching a maximum adsorption capacity higher than 300 mgg-1. The Lanmguir’s isotherm model described satisfactorily the interaction between the grafted copolymers and basic dyes. Freundlich’s isotherm model described the adsorption of anionic dye acid orange 52. The grafted copolymers removed successfully textile dyes from wastewater of the dyeing process. The best results were obtained in the removal of direct and basic dyes. Further, poly(ethylene glycol) grafted on the copolymer conferred better swelling behavior making easy the separation of the adsorbent after dye removal. The results showed that the adsorbent materials synthesized by radiochemical graftcopolymerization are more efficient than the beads, composite materials, and blends of chitosan.

Acrylic acid

Cationic polymerization

Methyl orange

10.15415/jnp.2021.82017

Cite

Citations (1)

Preparation, structural and NLO-optical characterization of LB-molecular films from asymmetric Bent-Core liquid crystals

P. García-Vázquez Omar G. Morales–Saavedra Ma. del Pilar Carreón-Castro G. Pelzl

Molecular mono- and multilayered films of a polar asymmetric bent-core (banana-shaped) liquid crystalline (LC) compound with hydrocarbon end-chain were prepared by the Langmuir-Blodgett (LB) technique. Langmuir films were characterized by surface pressure isotherms and Brewster angle microscopy (BAM). Likwise, LB-films deposited onto glass substrates were characterized by UV-VIS spectroscopy, the optical second hermonic generation (SHG) technique and atomic force microscopy (AFM). Results show that the asymmetric structure of bent-core liquid crystals may promotes and unstable multi-layered (n > 10 LB-layers) LB-architecture which leads to a rapid collapse of Z-type arrangements, giving rise to a drastic decrease of the nonliner optical (NLO) properties and film quality, Indeed, measurements evidence a tolerable and uniform molecular coverage on the glass substrates with anisotropic orientational distribution for a moderate number of layers only (n

Hyperpolarizability

Brewster's angle

Characterization

Cite

Citations (1)