Article
Engineering, Electrical & Electronic
R. Atoche-Ensenat, E. Perez, A. Hernandez-Benitez, A. Balam, Johan J. Estrada-Lopez, J. Vazquez-Castillo, F. Aviles, A. Castillo-Atoche
Summary: Recent advances in nanomaterials enable the fabrication of tactile sensors suitable for electronic skin, haptic interfaces, and biomedical applications. The problem of complex inertial measurements during the tactile process of polymer composites can be solved using artificial intelligence (AI). However, implementing AI-based signal processing on embedded devices is still an untapped opportunity for designing the next generation of smart wearable sensor systems. This study proposes a novel nanostructured smart tactile sensing system for wearable applications, utilizing a 3-D-printed structure with embedded electronic devices. The integration of electronic circuits for signal processing of an artificial neural network (NN) on a digital controller unit improves tactile interpretation in the wearable embedded device. Experimental results demonstrate 98% accuracy in pressure classification on MWCNT/PP composites.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Composites
Mario Bragaglia, Lorenzo Paleari, Francesca R. Lamastra, Debora Puglia, Francesco Fabbrocino, Francesca Nanni
Summary: In this study, strain monitoring epoxy-based coatings with different nanofillers were produced and applied on composite materials for strain sensing. Despite having the same initial electrical resistivity, the coatings showed different strain sensing performance and gauge factors at low strain, influenced by the initial distance among conductive particles of the nanofillers. The theoretical analysis revealed that the GNP samples had the highest gauge factor, MWCNT samples had the lowest, and the mixed system was in between.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2021)
Article
Polymer Science
Bangwei Wan, Yang Yang, Rongxin Guo, Zhengming Fan, Peng Deng, Shibo Zhang
Summary: A MWCNT/VMQ composite was prepared using DCP and DBPMH as vulcanizing agents, and the effects of the different agents on the properties of the composite were investigated. The DCP-vulcanized composites showed better mechanical properties and stability, as well as a more stable damage-reconstruction mechanism for the MWCNT network during deformation. An analytical model based on the tunnel effect theory confirmed the potential of this composite for real-time strain monitoring for large deformation structures.
Article
Polymer Science
Olesja Starkova, Klara Aniskevich, Jevgenijs Sevcenko, Olga Bulderberga, Andrey Aniskevich
Summary: Assessing the accumulated irreversible strains in polymer composites is crucial for controlling dimensional stability and remaining life of structural components. An empirical relationship between residual and total creep strain has been established through analysis of creep-recovery data, enabling a quick evaluation of long-term accumulated residual strains.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
A. Balam, R. H. Cruz-Estrada, A. Castillo-Atoche, F. Aviles
Summary: The study investigated the electrical conductivity and piezoresistivity of multiwall carbon nanotube/polypropylene composites obtained by extrusion, focusing on directional effects during the process. Higher electrical conductivity was observed in the extrusion direction, while piezoresistive sensitivity was similar in all directions. Reproducibility in changes in electrical resistance was observed, with small accumulation of local plasticity near electrodes as cycles increased. These irreversible material changes are expected to lead to permanent changes in electrical resistance.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Polymer Science
Angela Ries
Summary: Self-reinforced polypropylene composites have a wide range of applications, but maintaining self-reinforcement throughout processing presents challenges. Processing temperatures and pressures influence the orientation of fibers and tapes, impacting the microstructure and properties of the composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Mojtaba Ajorloo, Maryam Ghodrat, Won-Hee Kang
Summary: The study investigated the feasibility of utilizing waste materials such as recycled Polypropylene (PP) and fly ash in auto parts formulation. It was found that using recycled PP in composites affects mechanical properties but can lead to improvements in tensile strength due to better filler dispersion. The hybrid system of recycled PP and fly ash offers advantages in cost reduction and sustainable production.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Materials Science, Composites
Bowen Ding, Yuancheng Zhang, Jiqiang Wang, Shuxiang Mei, Xiaoyin Chen, Siyuan Li, Wei Zhao, Xiaomeng Zhang, Ge Shi, Yanjie He, Zhe Cui, Peng Fu, Xinchang Pang, Minying Liu
Summary: A novel mixed powder composed of laboratory-made thermoplastic polyether-block-amide (TPAE) and multi-walled carbon nanotubes (MWCNTs) was prepared using an environment-friendly approach. The resulting nanocomposite devices produced through selective laser sintering (SLS) process demonstrated a conductive network structure. The electrical properties, strain sensing ability, and electro-induced shape memory effect of the TPAE/MWCNTs nanocomposites were thoroughly investigated. The study found that the TPAE/MWCNTs nanocomposites exhibited increased conductivity with higher content of MWCNTs due to the interconnected conductive network of MWCNTs. The SLS-processed flexible sensor showed regular, fast, sensitive, and stable cyclic response during compressing tests with different deformation strain and speed, indicating its great potential in applications such as artificial electronic skin, human-machine interface, and health monitoring. Additionally, the TPAE-5.0C nanocomposite demonstrated excellent shape recovery ability during the electro-induced shape memory cycle triggered by Joule heat under DC voltage. The MWCNTs-TPAE powder developed in this study provides a novel material for SLS 3D printing, and SLS-processed devices with outstanding performance and multiple functions could be utilized in the future for the development of flexible and lightweight wearables.
COMPOSITES COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Yunbo Guo, Andreas Rosenkranz, Yumeng Xu, Yinxiang Lu
Summary: In this study, a multilayer composite based on PET and carbon nanotubes was designed with integrated sensing and shielding functions. The composite showed high sensitivity and linear range in glucose oxidation reaction, as well as good electromagnetic shielding effectiveness. The protective effect and serviceability of the composite were validated through simulation calculation and tensile tests.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhong Zheng, Jishi Liu, Jiafeng Tao, Jing Li, Wenqian Zhang, Xiuhong Li, Huan Xue
Summary: This study investigated the effects of electroless coatings on the microstructure and composition of the interface between multi-walled carbon nanotubes and a Cu matrix, as well as the resulting mechanical properties and wear behavior of the copper matrix composites. The Ni coating was found to be more continuous and dense than the Cu coating, leading to enhanced properties in the Ni@MWCNTs/Cu composite along the drawing direction. The ultimate tensile strength, compressive strength, friction coefficient, and wear rate were significantly improved compared to pure Cu samples.
Article
Polymer Science
Gang Li, Yanpei Fei, Tairong Kuang, Tong Liu, Mingqiang Zhong, Yanbiao Li, Jing Jiang, Lih-Sheng Turng, Feng Chen
Summary: This study explored the injection foaming process of in situ fibrillation reinforced polypropylene composites. The results showed that in situ fibrillation of PTFE can significantly influence the melt strength and viscoelasticity, thus improving the foaming performance. Additionally, the addition of MWCNTs endows the material with conductive properties. These findings are expected to be applied in the lightweight, antistatic, and high-performance automotive industry.
Article
Agricultural Engineering
Emese Pregi, Gabor Faludi, David Kun, Janos Moczo, Bela Pukanszky
Summary: Hybrid composites of polypropylene, lignin, and flax fibers were prepared with the use of a functionalized coupling agent. The combination of lignin and flax fibers resulted in materials with improved stiffness and strength, reduced carbon footprint, and acceptable price. However, a coupling agent is necessary to overcome the poor interaction between PP and natural reinforcements.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Green & Sustainable Science & Technology
Varsha Raj Govindaraju, Kempahanumakkagari Sureshkumar, Thippeswamy Ramakrishnappa, Sreeramareddygari Muralikrishna, Devaramani Samrat, Ranjith Krishna Pai, Vanish Kumar, Kumar Vikrant, Ki-Hyun Kim
Summary: Graphitic carbon nitride (g-C3N4) has great potential in photocatalytic applications, but its electrochemical applicabilities are limited by low electrical conductivity. Enhancing electrocatalytic activity through doping and alloying can unlock greater potential for g-C3N4 in environment and energy sectors in the future.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Nanoscience & Nanotechnology
Fuxi Liu, Deqiao Xie, Fei Lv, Lida Shen, Zongjun Tian, Jianfeng Zhao
Summary: This study utilizes digital light processing (DLP) to prepare flexible sensors with pore structures by dispersing fillers in a light-sensitive resin. Results demonstrate that the 1.2 wt% MWCNTs-GN/TPU material exhibits excellent sensing performance, with higher sensitivity and suitability for human body. This method provides new ideas for rapid formation of flexible sensors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Composites
Ashish Kaushal, Vishal Singh
Summary: This study investigates the dc conductivity, mechanical properties, and EMI shielding response of MWCNT reinforced polypropylene nanocomposites prepared by melt processing. The results show improved tensile strength and electrical conductivity, with significant EMI shielding effectiveness achieved at 5 wt% MWCNT load in the X-band frequency range. The prepared nanocomposite is considered suitable for industrial shielding applications due to its mechanical durability.
POLYMER COMPOSITES
(2021)
Article
Engineering, Biomedical
Hector A. Lobato-Aguilar, Gabriel Lizama-Uc, Jorge A. Uribe-Calderon, Juan Cauich-Rodriguez, Nayeli Rodriguez-Fuentes, J. Manuel Cervantes-Uc
JOURNAL OF BIOMATERIALS APPLICATIONS
(2020)
Article
Chemistry, Applied
Saul Sanchez-Valdes, Eduardo Ramirez-Vargas, Jose Alberto Rodriguez-Gonzalez, Jorge Alonso Uribe-Calderon, Luis Francisco Ramos de-Valle, Jose David Zuluaga-Parra, Juan Guillermo Martinez-Colunga, Silvia Guadalupe Solis-Rosales, Anhely Carolina Sanchez-Martinez, Rodolfo Flores-Flores, Ruben Saldivar-Guerrero
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2020)
Article
Polymer Science
Silvia Argelia Peraza-Ku, Jose Manuel Cervantes-Uc, Beatriz Escobar-Morales, Jorge Alonso Uribe-Calderon
Article
Polymer Science
Cynthia Guerrero-Bermea, Sofia Vazquez-Rodriguez, Saul Sanchez-Valdes, Jorge Alonso Uribe-Calderon
Summary: This study reports the production of hybrid organoclays composed of Cloisite 20A and modified graphene oxide (r-mGO) at different proportions, and their effect on the properties of PP composites. The results show that the laminated hybrid material exhibited homogeneous intercalation of Cloisite 20A and r-mGO, resulting in a rigid polymeric composite with improved mechanical properties at low filler content.
Article
Engineering, Electrical & Electronic
Luis Santiago Solis-Mendez, Jose Martin Baas-Lopez, Daniella Esperanza Pacheco-Catalan, Jorge Alonso Uribe-Calderon
Summary: The study investigated the effect of PANI nanofibers content on the electrochemical properties of composites based on SnO2 nanoflakes. It was found that the composites exhibited higher specific capacitance and capacitance, with high coulombic efficiencies (> 90% after 5000 cycles). Furthermore, the capacitance of composites increased, and resistance to charge transfer decreased with the PANI content, showing a synergetic effect of the electrode materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Applied
J. N. Saucedo-Zuniga, S. Sanchez-Valdes, E. Ramirez-Vargas, L. Guillen, L. F. Ramos-deValle, A. Graciano-Verdugo, J. A. Uribe-Calderon, M. Valera-Zaragoza, T. Lozano-Ramirez, J. A. Rodriguez-Gonzalez, J. J. Borjas-Ramos, J. D. Zuluaga-Parra
Summary: This study focuses on the preparation and characterization of a multilayer film reservoir with clay/essential oil composites for aroma-controlled release. Two types of clays and essential oils were analyzed, with MMT clay showing higher adsorption and interaction. The multilayer film encapsulated clay/EO composites showed continuous aroma release, indicating potential applications in pest control and food packaging.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Food Science & Technology
Patricia Martinez, Darcy Vilcarromero, Diego Pozo, Fiorela Pena, Jose Manuel Cervantes-Uc, Jorge Uribe-Calderon, Carmen Velezmoro
Summary: This study evaluated the starch characteristics of ten native potato varieties grown in Cusco, revealing subtle differences in protein content, amylose content, phosphorus content, morphology, structure, thermal properties, and viscosity among the starches. These variations make the starches suitable for different applications in the food industry.
JOURNAL OF FOOD SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Silvia Argelia Peraza-Ku, Beatriz Escobar-Morales, Nayeli Rodriguez-Fuentes, Jose Manuel Cervantes-Uc, Jorge Alonso Uribe-Calderon
Summary: This study suggests an alternative method for producing drug delivery systems using Ceiba pentandra fibers. Crosslinked Ceiba pentandra fibers showed promising drug release kinetics and low cytotoxicity in vitro studies, indicating their feasibility for drug release applications.
CARBOHYDRATE RESEARCH
(2021)
Article
Engineering, Biomedical
Baptiste Levenez, Tania Gil-Cortes, Nayeli Rodriguez-Fuentes, Juana Enriquez Jimenez, Wilberth Herrera-Kao, Maria Loria-Bastarrachea, Alejandro May-Pat, Cynthia Guerrero-Bermea, Jorge Uribe-Calderon, Jose M. Cervantes-Uc
Summary: The study aimed to enhance the mechanical properties of acrylic bone cement by modifying graphene oxide (GO) with various concentrations of organosilane and found that using 1% of silane coupling agent achieved the best mechanical performance without compromising cytocompatibility and hemocompatibility. The results suggest that the interaction between nanofillers and polymeric matrices can be improved through surface treatment of GO, leading to enhanced mechanical properties in acrylic bone cement formulations.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2021)
Article
Materials Science, Multidisciplinary
Carlos Bellaner Diaz-Arriaga, Daniella Esperanza Pacheco-Catalan, Jorge Uribe-Calderon
Summary: In this study, Polypyrrole/Palygorskite (PPy/Pal) nanocomposites were prepared using acid treatments on Pal templates, resulting in enhanced electrochemical properties compared to PPy alone. The acid-treated Pals showed potential as natural and low-cost templates for producing one-dimensional PPy/Pal nanocomposites for use as electrodes in electrochemical capacitors.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
J. David Zuluaga-Parra, Luis F. Ramos-deValle, Saul Sanchez-Valdes, Jose Roman Torres-Lubian, Oliverio S. Rodriguez-Fernadez, Ernesto Hernandez-Hernandez, Luciano da Silva, Jose Alberto Rodriguez-Gonzalez, Javier J. Borjas-Ramos, Sofia Vazquez-Rodriguez, Jorge A. Uribe-Calderon
Summary: Phosphorylated avocado seed can be utilized as a renewable biofiller for polymer composites with enhanced flame-retardant properties, exhibiting a significant reduction in peak heat release rate and total heat released. The chemical modification greatly improves the thermal stability of avocado seed, while maintaining similar tensile strength and modulus in bio-composites compared to LDPE/EVA blend.
FIRE AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Soledad Cecilia Pech-Cohuo, Jovani Hernandez-Colula, Nancy G. Gonzalez-Canche, Ivan Salgado-Transito, Jorge Uribe-Calderon, Jose Manuel Cervantes-Uc, Juan Carlos Cuevas-Bernardino, Teresa Ayora-Talavera, Neith Pacheco
Summary: The study evaluated the effect of extractive solution on starch isolation from Ramon seed flour, finding that both distilled water and NaOH solution extraction methods yielded similar starch morphology, functional groups, and crystallinity values, suggesting their suitability. The isolated starches also exhibited similar thermal behavior, indicating their comparable quality.
Article
Polymer Science
Soledad Cecilia Pech-Cohuo, Hector Martin-Lopez, Jorge Uribe-Calderon, Nancy Guadalupe Gonzalez-Canche, Ivan Salgado-Transito, Alejandro May-Pat, Juan Carlos Cuevas-Bernardino, Teresa Ayora-Talavera, Jose Manuel Cervantes-Uc, Neith Pacheco
Summary: The properties of biological-chemical chitosan (BCh) films prepared from marine-industrial waste and a non-conventional Ramon starch (RS) were investigated. The blended films of BCh/RS with quercetin showed good thermal stability, improved antioxidant and antimicrobial activity. These films have potential applications as coating materials in food packaging.
Article
Engineering, Biomedical
A. D. Abreu-Rejon, W. Herrera-Kao, A. May-Pat, A. Avila-Ortega, N. Rodriguez-Fuentes, J. A. Uribe-Calderon, J. M. Cervantes-Uc
Summary: Surface modification of Tecoflex SG-80A Polyurethane films using polyethylene glycol (PEG) chains resulted in improved surface properties. The PEG-grafted polyurethane extracts showed increased viability of osteoblasts but had no significant effect on fibroblasts. Lower PEG grafting densities promoted healthier cell morphology.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2022)
Article
Materials Science, Multidisciplinary
Carlos Bellaner Diaz-Arriaga, Jose Martin Baas-Lopez, Daniella Esperanza Pacheco-Catalan, Jorge Uribe-Calderon
