Article
Chemistry, Multidisciplinary
E. I. Chereches, A. A. Minea
Summary: This study focuses on the applications of nanocolloids based on [C4mim][BF4] ionic liquid and investigates the electrical conductivity of the ionic liquid and three types of nanoparticles suspended in it. The results show that the electrical conductivity variation with temperature is linear, and the loading of nanoparticles has a significant impact on the conductivity of the suspensions.
Article
Polymer Science
Tar-Hwa Hsieh, Lin-Chia Ho, Yen-Zen Wang, Ko-Shan Ho, Cheng-Hsien Tsai, Li-Fan Hung
Summary: The hydrophilic initiator potassium persulfate was transformed into a hydrophobic molecule by forming a complex with cetyltrimethylammonium bromide, allowing for inverse emulsion polymerization to take place inside micelles. The resulting iron compound, after calcination, exhibited superparamagnetic properties with a high saturation magnetization, which decreased over time when exposed to the atmosphere.
Article
Polymer Science
Sanhanut Kesornsit, Chatrawee Direksilp, Katesara Phasuksom, Natlita Thummarungsan, Phimchanok Sakunpongpitiporn, Kornkanok Rotjanasuworapong, Anuvat Sirivat, Sumonman Niamlang
Summary: Poly(3-hexylthiophene) (P3HT) was synthesized by chemical oxidative polymerization using ferric chloride (FeCl3) as the oxidizing agent and various surfactants as shape templates. The effects of mole ratios, polymerization times, and surfactant types and concentrations on the electrical conductivity and particle properties were investigated. The results showed that P3HT synthesized with dodecylbenzenesulfonic acid (DBSA) at Critical Micelle Concentration (CMC) 6 had the highest electrical conductivity and particle size of 1530 +/- 227 nm. The thermal analysis revealed that surfactant-synthesized P3HT had higher stability and char yields. The electrical conductivity of DBSA-synthesized P3HT was further enhanced by doping with HClO4.
Article
Materials Science, Composites
Tengfei Lin, Haojie Yu, Li Wang, Qinghua Ma, Haiyu Huang, Li Wang, Md Alim Uddin, Fazal Haq, Dmitry A. Lemenovskiy
Summary: In this study, PANI/C-60 composites were synthesized using in-situ chemical oxidative polymerization method, and the effects of different reaction conditions on the properties of the products were investigated. The composites exhibited good electromagnetic interference shielding performance.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Anton B. Kornberg, Michael R. Thompson, Shiping Zhu
Summary: A polyethylene film with a nano-dispersed polyaniline conductive network was developed using controlled crazing in a high-pressure reactor immersed in an emulsified medium of aniline in chloroform. The resulting conductive material exhibited moderate electron conductivity while maintaining the ductility of the polyethylene matrix. The embedded polyaniline fibers acted as both nucleating agents for controlled crazing and submicrometer conductive nodes, contributing to the increased electrical permeability of the secondary phase.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Loan F. Calheiros Souto, Bluma G. Soares
Summary: In this study, polyaniline doped with dodecylbenzene sulfonic acid (PAni.DBSA) was synthesized using in situ inverted emulsion polymerization method and the composites with ethylene vinyl acetate (EVA) copolymer were explored as potential microwave absorbing materials. The findings reveal that the microwave absorption performance of EVA@PAni composites is influenced by the PAni content, with the optimal attenuation achieved by the composite with 33 vol % PAni, displaying a minimum reflection loss of -39 dB (99.99% attenuation) at 16.65 GHz.
Article
Nanoscience & Nanotechnology
Xiaojiang Xu, Feichong Yao, Ola A. Abu Ali, Wenhao Xie, Samy F. Mahmoud, Peitao Xie, Salah M. El-Bahy, Mina Huang, Chuntai Liu, Runhua Fan, Zhanhu Guo, Ai Du, Diana Estevez, Faxiang Qin, Huaxin Peng, David P. Young, Hongbo Gu
Summary: This work presents a novel approach to develop hollow carbon nanofibers/polyaniline (HCNFs/PANI) nanocomposites with adjustable core-sheath architecture, negative permittivity, and outstanding electromagnetic interference (EMI) shielding performance. The effect of polyaniline sheath thickness on the electrical property and EMI performance of HCNFs/PANI nanocomposites is studied in detail. Results show that the HCNFs/PANI nanocomposites with a HCNFs loading of 50 wt% exhibit the highest electrical conductivity and the largest EMI shielding effectiveness within the X-band range. The excellent electrical conductivity, changeable dielectric resonance, and internal multiple scattering at interfaces contribute to the unique EMI shielding performance of HCNFs/PANI nanocomposites.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Fariba Moshtaghi, Mardali Yousefpour, Ali Habibolahzadeh
Summary: Polyaniline-Bi-Sb-Te-Se thin films were fabricated on aluminum substrate using electrodeposition and electrochemical reaction method. The structure and morphology of the films were analyzed by FTIR, XRD, FE-SEM, and EDS. The electrical and thermoelectric properties of the films were evaluated, and it was found that the chemical composition and applied potential greatly influenced the thermoelectric properties. Furthermore, a slight change in the chemical compound improved the thermoelectric properties by approximately 65%.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Polymer Science
Ariadna Jimenez-Victoria, Rene D. Peralta-Rodriguez, Enrique Saldivar-Guerra, Gladis Y. Cortez-Mazatan, Lluvia de Abril A. Soriano-Melgar, Carlos Guerrero-Sanchez
Summary: This study investigates the use of an ionic liquid as a surfactant in emulsion polymerization. The selected amphiphile cationic oligoether performs similarly to the conventional surfactant and demonstrates the capability to stabilize the polymerization process.
Article
Polymer Science
Svitlana Railian, Yasemin Fadil, Vipul Agarwal, Tanja Junkers, Per B. Zetterlund
Summary: The modification of graphene oxide (GO) sheets and their application in emulsion polymerization were explored in this study, showing that stable latexes and nanocomposite films can be successfully obtained using GO and GO-COOH, while encountering colloidal instability when synthesizing GO-PMMA and GO-PDEGA.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Jiancheng Wang, Han Sun, Zhiyao Yang, Yudong Wang, Xiaopeng Zhao, Jianbo Yin
Summary: A composite ER polishing particles composed of PIL ER active particles covalently attached with commercial Al2O3 nanoabrasives is reported, offering a solution to the insufficient performance of traditional ER polishing fluids. The composite particles, prepared by polymerization of a Pickering emulsion, effectively overcome the phase separation issue and exhibit significantly better ER effect and polishing property compared to simple mixtures. By integrating ER effect and polishing property into a particle system, this study provides a new direction for improving ER polishing technology.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
He Zhang, Liang Zou, Yanhong Feng
Summary: Microcapsules containing conductive ionic liquid (IL) were synthesized using a novel microencapsulation technique, and their high potential for conductivity restoration in conductive pastes for printed circuits was verified. The prepared IL microcapsules have good dispersibility, solidity, and tunable properties.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Yunlan Shi, Shuhui Liu, Shuhui Wang, You Yu, Xin Chen, Xiao Zhu
Summary: Two new azole-based ionic liquids [HDBN][Im] and [HDBN][Tri] were synthesized and their properties were investigated. The density and viscosity of the pure ILs and their binary mixtures with alcohols were measured. The temperature dependence of viscosity was analyzed and the activation energy for viscous flow was calculated. The relationship between viscosity and molar conductivity was discussed, and the excess properties and excess Gibbs energy of activation for viscous flow in ILs + alcohol mixtures were determined.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Bingying Wang, Zaisheng Zhu, Jiayu Yin, Xiaoxing Lu
Summary: The present study introduces a novel surface-active ionic liquid (SAIL) that has potential for preparing stable microemulsion (ME). The SAIL exhibits higher surface activity compared to common surfactants. It is capable of solubilizing various oil components and water, forming stable ME in a wide range of water-to-oil ratios. The optimal salinity conditions for ME stability were determined, and the presence of monovalent ions was found to enhance the stability of the ME system.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Ilaria Ragazzini, Riccardo Castagnoli, Isacco Gualandi, Maria Cristina Cassani, Daniele Nanni, Francesca Gambassi, Erika Scavetta, Elena Bernardi, Barbara Ballarin
Summary: Ambient humidity is an important parameter that affects the manufacturing and storage of industrial and agricultural goods. This paper reports the development of a low-cost humidity sensor made of cellulose and polyaniline, which shows similar performance to a commercial sensor. The sensor has potential applications in agriculture, food monitoring, and medical and industrial environments.
Article
Engineering, Environmental
Ariadne Leao, Tamara Indrusiak, Marysilvia F. Costa, Bluma G. Soares
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2020)
Article
Polymer Science
Ana Maria G. Silva, Iaci M. Pereira, Tamara Silva, Manoel R. da Silva, Renata A. Rocha, Merces C. Silva
Summary: In this study, electromagnetic radiation absorbent materials were prepared and the effects of porosity and charge content on radiation attenuation were investigated. The results showed that the increase in nanomagnetic content compensated for the action of the charge as a cell opener in absorbing incident radiation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Ketly Pontes, Tamara Indrusiak, Bluma G. Soares
Summary: The conductive blends of PVDF-co-HFP/PAni were prepared by in situ polymerization and dry blending approach, showing that samples prepared in H2O/toluene medium exhibited better performance. Different preparation methods and material compositions have significant effects on conductivity and electromagnetic interference shielding effectiveness.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Tamara Indrusiak, Iaci M. Pereira, Ana P. Heitmann, Jeferson G. Silva, Angelo M. L. Denadai, Bluma G. Soares
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Engineering, Mechanical
L. R. Orlandini, I. R. Henriques, D. A. Castello, L. A. Borges, B. G. Soares
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2020)
Article
Chemistry, Applied
Loan F. Calheiros Souto, Bluma G. Soares
PROGRESS IN ORGANIC COATINGS
(2020)
Article
Chemistry, Physical
Ruan R. Henriques, Bluma G. Soares
Summary: This study discusses the performance of sepiolite modified with phosphonium-based ionic liquids as anti-corrosive pigment for epoxy resin coatings, showing enhanced corrosion resistance and outstanding barrier properties provided by the modified sepiolite with ionic liquids for epoxy resins.
APPLIED CLAY SCIENCE
(2021)
Article
Polymer Science
Alessandra de Alencar Padua Gabino, Bluma Guenther Soares, Adriana Anjos Silva
Summary: Electrically conductive thermoplastic vulcanizates based on polypropylene/nitrile rubber blends loaded with multiwalled carbon nanotubes were prepared by dynamic vulcanization. Two different mixing sequences were used to incorporate the CNT, both of which favored the location of CNT inside the PP phase and achieved low percolation threshold and good conductivity performance. The TPV samples prepared by both methods showed an overall electromagnetic attenuation of around 70% in the X-band frequency range.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Camila Mouta Caldas, Bluma Guenther Soares, Tamara Indrusiak, Guilherme Mariz Oliveira Barra
Summary: By modifying PMMA nanocomposites and incorporating GNP with different fluorinated ionic liquids, composites with high thermal stability and conductivity can be obtained, showing excellent absorption properties in terms of microwave absorption.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Characterization & Testing
Juliana M. Farias da Silva, Bluma G. Soares
Summary: Epoxidized cardanol-based prepolymer (ECP) from cashew nut shell liquid (CNSL) was successfully utilized as a biobased compatibilizer/chain extender for PLA/PBAT blends, improving mechanical, dynamic-mechanical and thermal properties, and offering new possibilities for cost-effective biobased and/or biodegradable materials for food packaging applications.
Article
Materials Science, Multidisciplinary
Isabela Pinto Ferreira, Alex da Silva Sirqueira, Taiane Andre dos Santos, Monica Feijo Naccache, Bluma Guenther Soares
Summary: Research on bio-plasticizers in polymer blends is strategically important. The bio-plasticizer CNSL was found to improve mechanical properties of EVA and SBS blends, as well as influencing creep and recovery behavior. The concentration of the bio-plasticizer significantly correlated with rheological test results, leading to an increase in the elastic phase.
JOURNAL OF ELASTOMERS AND PLASTICS
(2021)
Review
Materials Science, Composites
Bluma Guenther Soares, Guilherme M. O. Barra, Tamara Indrusiak
Summary: This review article provides an overview of existing methods to produce intrinsically conducting polymers and their blends for electromagnetic shielding applications. These materials have good conductivity and corrosion resistance, can interact with electromagnetic radiation through absorption and reflection mechanisms, thus expanding the field of application.
JOURNAL OF COMPOSITES SCIENCE
(2021)
Article
Polymer Science
Bluma Guenther Soares, Adriana A. Silva, Veronica D. Lima, Deborah N. Barros, Sebastien Livi
Summary: A novel toughened epoxy system cured with anhydride-based hardener was successfully prepared by incorporating nonpolar liquid polybutadiene functionalized with isocyanate groups. The resulting ER-PB-ER triblock copolymer displayed cocontinuous-like morphology and led to a significant improvement in toughness and impact resistance, while also increasing the glass transition temperature of the system. The excellent physic-mechanical performance was attributed to the unique morphology achieved through the addition of the modified polybutadiene.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.
