Article
Materials Science, Ceramics
Nanao Ningthemcha, Dipankar Biswas, Rittwick Mondal, Anindya Sundar Das, Soumyajyoti Kabi, Deepanwita Ghosh, Loitongbam Surajkumar Singh, Bijan Deb
Summary: The influence of TeO2 and MoO(3 )content on optical and dielectric properties in the ZnO-P2O5 glass matrix has been studied. The dielectric constant and dielectric loss are affected by the mixed modifiers, and the ferroelectric relaxor properties are also observed.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Mayank Jaiswal, Geetanjali Srivastava, Sonam Mishra, Praveen Kumar Singh, Ravindra Dhar, Roman Dabrowski
Summary: The green synthesis of copper oxide nanoparticles (CuO NPs) was successfully achieved using a biological, eco-friendly, and cost-effective method without requiring an inert atmosphere. The synthesized CuO NPs were characterized and confirmed to have a size of 2-3 nm through X-ray diffraction, ultraviolet-visible spectroscopy, and Fourier transform infrared spectroscopy techniques. Two different weight percentages (0.2 and 0.5) of the CuO NPs were dispersed in a liquid crystalline material (4-pentyl-4'-cyanobiphenyl, 5CB), and the physical properties of the pure 5CB and its nanocomposites were studied. The results showed enhancements in the nematic-isotropic transition temperature and conductivity, as well as a decrease in the optical band gaps of the dispersed samples.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Optics
Dalal Abdullah Aloraini, Ashok Kumar, Aljawhara H. Almuqrin, M. Sayyed
Summary: The addition of BaO affects the optical and gamma ray shielding characteristics of the glasses, leading to an increase in optical band gap energy and a decrease in refractive index. The molar refractivity and molar electronic polarizability decrease with the substitution of BaO. The results indicate that increasing the BaO content in the glass system results in more desirable radiation shielding properties.
Article
Chemistry, Physical
Arulmani Marimuthu, Rajesh Narayana Perumal
Summary: In this study, a holmium doped rubidium titanyl phosphate single crystal was grown using a high-temperature flux method, confirming its structural nature and the impact of holmium doping on electrical and ferroelectric properties. However, the Curie point of the Ho: RTP single crystal remained unchanged compared to pure RTP.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Wenqiang Yang, Dou Yang, Hui Mei, Li Yao, Shanshan Xiao, Yongtao Yao, Chao Chen, Laifei Cheng
Summary: This study presents 3D printed PDC-SiOC ceramics modified with SiCnw, showing high permittivity in the X-band. The ceramics exhibit strong EMI shielding capabilities, with a certain level of mechanical properties at 900 degrees Celsius.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Manoj Kumar Anjana, Manoj Kumar Vyas, Amita Chandra
Summary: This study focuses on the synthesis and characterization of polymer nanocomposite (PNC) films composed of polyethylene oxide (PEO), inorganic salt lithium bis(trifluoromethane)sulfonimidate ([Li][TFSI]), ionic liquid 1-Hexyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide ([HMIM][TFSI]), MWCNTs, and CoFe2O4 nanoparticles through solution cast method. The addition of [Li][TFSI], [HMIM][TFSI], and MWCNTs in the polymer matrix leads to enhanced conductivity (mixed conduction of ions and electrons) and dielectric properties of the composite films as confirmed by complex impedance spectroscopy. The synergistic effect between the two fillers (MWCNTs and CoFe2O4) contributes to the improved shielding effectiveness (SE) through the connecting network provided by CNTs and magnetic losses from CoFe2O4. Furthermore, the combination of -CoFe2O4 and polymer electrolyte with 6 wt% MWCNTs (PECN0) allows for the tuned attenuation of incident electromagnetic waves (frequency range 8.2-12.4 GHz), achieving a commercially desired SE of approximately 47 dB in X-band.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Saurabh Raj, Shivesh Tripathi, Gaurav Upadhyay, Shiv Shanker Tripathi, Vijay Shanker Tripathi
Summary: This paper presents a novel antenna design for non-invasive measurement of glucose concentration in blood plasma, featuring a compact size and a wide bandwidth. The antenna, serving as an RF sensor, shows potential for real-time glucose level monitoring with satisfactory accuracy and sensitivity.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
M. A. Wederni, W. Hzez, A. Rached, R. Meftah, H. Rahmouni, K. Khirouni, S. Alaya, R. J. Martin-Palma
Summary: This study focuses on the development of novel lead-free materials that can replace lead-based compounds in high-temperature devices. By partially replacing Bi ions in Bi4Ti3O12 with Yb and Er, the researchers aimed to improve the material's physical properties. By adjusting the Yb content, they were able to control the conductivity, impedance, and permittivity of the material at different temperatures, opening up new possibilities for its application.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Xi-Xi Wang, Qi Zheng, Yuan-Jin Zheng, Mao-Sheng Cao
Summary: Benefiting from new materials, innovative structures, advanced techniques, and multiple mechanisms, electro-magnetic interference (EMI) shielding materials are developing vigorously. However, the electromagnetic pollution caused by excessive secondary reflection has not received enough attention in the pursuit of high-efficiency EMI shielding performance. Developing green EMI shielding is becoming a new hot topic.
Article
Materials Science, Ceramics
M. S. Sadeq, M. I. Sayyed, Abd El-razek Mahmoud, M. A. Abdo, H. Elhosiny Ali, H. Y. Morshidy
Summary: This paper investigates the significant improvements in the radiation shielding and optical properties of cadmium oxide and iron oxide sodium borate glasses by changing the CdO/B2O3 ratios. The results show that increasing CdO/B2O3 content leads to slightly decreased transparency and shifted absorption edges. The radiation shielding properties, such as mass attenuation coefficient and half-value layer, also show enhanced behaviors with additional CdO. These glasses are promising candidates in the radiation shielding field due to their enhanced properties.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Jiali Chen, Yunan Shi, Kaichao Pan, Jiang Du, Jun Qiu
Summary: This study innovatively constructs carbon nanofiber/conductive polymer metacomposites with 3D overlapping network structures to achieve negative permittivity characteristics in the radar wave frequency range. Convenient methods for adjusting the electromagnetic parameters are proposed. Furthermore, the study extensively discusses the valuable application of electromagnetic shielding in metacomposites.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Green & Sustainable Science & Technology
D. Mondal, D. Bhattacharya, T. Mondal, M. Kundu, S. Sarkar, T. K. Mandal, B. K. Paul, S. Das
Summary: Rare earth elements Gd3+ and Er3+ ions were successfully impregnated into the α-MnO(2) structure using a modified chemical synthesis route and hydrothermal technique. The material exhibited high electromagnetic interference (EMI) shielding effectiveness, effectively blocking electromagnetic waves in the microwave/GHz frequency range.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
N. A. Vanyushkin, A. H. Gevorgyan, S. S. Golik
Summary: In this study, a new method is proposed to calculate the reflection and transmission coefficients of an arbitrarily polarized electromagnetic plane wave incident on a one-dimensional dielectric medium with finite thickness. The method reduces the problem of plane wave scattering by an inhomogeneous layer to a system of first order differential equations that involve the derivative of the refractive index or dielectric permittivity of the layer. This method also allows for easy determination of the field strength distribution within the layer and provides comparable results to the analytical solution based on Mathieu functions.
Article
Computer Science, Information Systems
Hongje Jang, Myungryul Choi, Taesueng Song, Sungwook Kim
Summary: This paper proposes a method for measuring the shielding effectiveness (SE) of concrete based on the MIL-STD-188-125-1 standard. By using small concrete blocks as specimens, the accuracy is optimized in the frequency range of 600 MHz to 1.5 GHz. Results show that the proposed method can be used to ensure that buildings constructed with the same concrete have the same SE.
Article
Materials Science, Ceramics
Meenu Chahar, Samiksha Dabas, O. P. Thakur
Summary: This study synthesized nano-composites of Ni0.5Zn0.5Fe2O4/MWCNTs and investigated their properties using various analytical techniques. The synthesized materials exhibited crystalline phase formation and a hexagonal flake-like structure. The electromagnetic interference performance of the materials was tested using a Vector Network Analyzer, and the CM nano-composite showed excellent shielding effectiveness.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
N. K. Hota, N. Karna, K. A. Dubey, D. K. Tripathy, B. P. Sahoo
EUROPEAN POLYMER JOURNAL
(2019)
Article
Materials Science, Composites
Nanda Kumar Hota, Namita Karna, Deba Kumar Tripathy, Kumar Abhinav Dubey, Bibhu Prasad Sahoo
PLASTICS RUBBER AND COMPOSITES
(2019)
Article
Polymer Science
Ganeswar Sahu, Mamata Das, Mithilesh Yadav, Bibhu Prasad Sahoo, Jasaswini Tripathy
Article
Materials Science, Multidisciplinary
Kalyani Dash, Nanda Kumar Hota, Bibhu Prasad Sahoo
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Materials Science, Composites
Ganeswar Sahu, Jasaswini Tripathy, Bibhu Prasad Sahoo
POLYMER COMPOSITES
(2020)
Article
Materials Science, Multidisciplinary
Barsharani Priyadarshini, Bibhu Prasad Sahoo, Trilochan Sahoo, Tapas Ranjan Sahoo
Summary: The dielectric properties of nanoscale MgO and Zn-doped MgO nanoparticles were studied in this research, showing that the dielectric permittivity and dielectric loss of the materials increased with Zn doping at lower frequency, while the AC conductivity of doped nanoparticles gradually increased with frequency range. The impedance, both real and imaginary, decreased with an increase in the percentage of Zn doping.
Article
Polymer Science
Kalyani Dash, Bibhu Prasad Sahoo
Summary: Conductive polymer nanocomposites exhibit excellent dielectric characteristics and interesting relaxation behaviors, which can be effectively enhanced by adjusting the TiO2 loading level in the thermoplastic polyurethane/polyaniline/TiO2 nanocomposite films. The incorporation of 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid (IL) further improves the dielectric properties of the nanocomposite system.
POLYMER INTERNATIONAL
(2022)
Article
Polymer Science
Swatee Acharya, Lopamudra Swain, Bibhu Prasad Sahoo
Summary: Thermoplastic polyurethane/polypyrrole (TPU/PPy) dielectric composites film and lightweight foamyfilm were fabricated using simplified solvent casting and modified phase separation water immersion techniques. Chemical interaction and morphological investigations were analyzed through Raman spectroscopy and field emission scanning electron microscope (FESEM), respectively. The dielectric properties, including complex impedance, were determined over a wide range of frequencies and temperatures. The fabricated films exhibited low dielectric loss and can be used in energy storage and high-temperature sensing applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Debashish Meher, Swatee Suman, Swatee Acharya, Bibhu Prasad Sahoo
Summary: This study explores the significant enhancement in dielectric performance, thermal properties, and optical energy band gap of reduced form graphene oxide (RGO) based poly (vinylidene fluoride) (PVDF)/polyaniline (PANI) blend nanocomposites. The addition of RGO alters the energy band structure, as shown by the shifting of the optical energy band gap. The thermal stability of the nanocomposites is influenced by RGO and ionic liquid. Overall, this composite material is suitable for electromagnetic shielding applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Ganeswar Sahu, Bibhu Prasad Sahoo, Jasaswini Tripathy
Summary: Polymer nanocomposites based on single-walled carbon nanotubes and poly(vinyl alcohol) were successfully prepared using a solvent casting approach. The dispersion pattern of nanotubes and the mechanical and thermal stability of the films were analyzed. The dielectric relaxation behavior of the nanocomposites was investigated with varying nanotube loading and the presence of an ionic liquid.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Bibhu Prasad Sahoo
Summary: Developed electron beam crosslinked and MWCNT reinforced AEM nanocomposites exhibit significantly increased crosslink density and gel fraction with increasing EB dose and MWCNT loading, confirming the reinforcing effects of MWCNT. FESEM analysis shows uniformly dispersed MWCNT with closely spaced network structures in AEM matrix, leading to improved tensile strength and modulus. Increase in EB dose and MWCNT loading also result in higher tensile and storage modulus, as well as improved AC conductivity and dielectric permittivity of the nanocomposites.
MATERIALS TODAY-PROCEEDINGS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Nanda Kumar Hota, Bibhu Prasad Sahoo
Summary: In this study, electrically conductive nanocomposites based on TPU and SWCNT were successfully prepared, and their dielectric properties were analyzed. The increase in dielectric permittivity with increasing SWCNT loading is mainly attributed to an increase in polarizable dipoles. Furthermore, the increase in AC conductivity with increasing SWCNT loading is mainly due to frequent hopping and tunnelling mechanisms. Moreover, the capacitive characteristics and bulk resistivity of the nanocomposites are influenced by the distance between conductive channels and the incorporation of ionic liquid.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
