Article
Chemistry, Physical
Harilal, Avanish Shukla, Prakash Chandra Ghosh, Tushar Jana
Summary: The study successfully enhanced the structural and mechanical stability of pyridine-bridged oxypolybenzimidazole (PyOPBI) membranes in concentrated phosphoric acid, and significantly improved proton conductivity by incorporating bulky substituents and flexible aryl ether backbones. The membranes exhibited good stability and high proton conductivity at high temperatures, attributed to the bulky pendent groups and flexible backbone, showing promising potential for advanced PBI-based HT-PEM fuel cells.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Polymer Science
Rambabu Koyilapu, Suchismita Subhadarshini, Shuvra Singha, Tushar Jana
Summary: In this study, in-situ RAFT polymerization of poly(N-vinylimidazole) (PNVI) was successfully carried out in the intergalleries of Cloisite nanoclay to synthesize PNVI of different molecular weights. The PNVI modified clays were used to prepare nanocomposite membranes, with the results showing that the clay containing high molecular weight PNVI demonstrated the most effective enhancement of membrane properties.
Article
Chemistry, Physical
Suchismita Subhadarshini, J. Shanthi Sravan, Omprakash Sarkar, S. Venkata Mohan, Tapta Kanchan Roy, Tushar Jana
Summary: In this study, a high-molecular weight sulfonated oxybispolybenzimidazole (MSOPBI) membrane was synthesized and tested in a microbial fuel cell (MFC). Compared to the traditional Nafion membrane, the MSOPBI membrane displayed better properties including moderate ion exchange capacity, good proton conductivity, low dimensional swelling, and enhanced mechanical strength. The MFC operation with the MSOPBI membrane showed higher power density and increased bioelectrochemical activity. Therefore, the newly synthesized MSOPBI membrane proves effective for the production of renewable energy and wastewater treatment in MFCs.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Anupam Das, Nilanjan Mukherjee, Tushar Jana
Summary: In this study, graphene oxide (GO) was functionalized by growing polymer chains on its surface to make a highly efficient nanocomposite-based proton exchange membrane (PEM) with oxypolybenzimidazole (OPBI). Three different types of polymer-g-GO, which were pAAM-g-GO, pAMPS-g-GO, and pSPAK-g-GO, were obtained by polymerizing different monomers on the activated GO surface. The effects of grafted polymer structure and chain length on nanocomposite PEM properties were studied. The nanocomposite PEM exhibited excellent thermal stability, improved tensile properties, increased proton conductivity, and superior phosphoric acid (PA) retention. When 2.5 wt% pSPAK-g-GO was mixed with OPBI, the resulting PEM showed significantly enhanced proton conductivity compared to the pristine OPBI membrane. This is the first report on the utilization of polymer-g-GO in polybenzimidazole membranes for high-temperature PEM application.
ACS APPLIED NANO MATERIALS
(2023)
Review
Biochemistry & Molecular Biology
Junyu Chen, Jiamu Cao, Rongji Zhang, Jing Zhou, Shimin Wang, Xu Liu, Tinghe Zhang, Xinyuan Tao, Yufeng Zhang
Summary: By modifying PBI membranes in both hydrogen-air PEMFCs and DMFCs to improve proton conductivity, it is possible to address the issues of low CO tolerance of the Pt electrode catalyst and methanol permanence, thus enhancing the performance of fuel cells.
Article
Chemistry, Physical
Yan Wang, Zihan Xia, Hui Ding, Ziwei Fan, Hui Guo, Peng Sun, Zhongfang Li
Summary: A cross-linkable proton conductor SHBPBI was synthesized by sulfonating hyperbranched polybenzimidazole. A high-temperature proton exchange membrane was prepared with excellent thermal stability and proton conductivity. The composite membrane showed potential applications in proton exchange membrane fuel cells and direct methanol fuel cells due to its good performance in proton conduction, durability, and low leaching rate.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Junghwan Kim, Kihyun Kim, Taeyun Ko, Jusung Han, Jong-Chan Lee
Summary: By using ImGO as a filler, the PBI composite membrane shows improved mechanical properties and proton conductivity compared to traditional filler GO. The compatibility of ImGO with PBI matrix is better, resulting in better overall performance of the membrane.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Hui Ding, Peng Sun, Yan Wang, Zihan Xia, Ping Li, Chengzhi Cui, Mingyu Li, Zhongfang Li
Summary: In this study, a flexible branched polymer, a cross-linkable water-soluble proton conductor, and a multi-functional cross-linker were designed to fabricate high-temperature proton exchange membranes with good comprehensive performances. The branched structure of the polymer and the cross-linker improved proton conductivity and mechanical properties, while the cross-linking process enhanced membrane strength and oxidative resistance. However, excessive cross-linking or branching can deteriorate membrane performances.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
J. O. Leader, Y. Yue, M. R. Walluk, T. A. Trabold
Summary: High-temperature proton exchange membrane fuel cells (HT-PEM) have advantages such as improved fuel impurity tolerance and increased electrode kinetics. This study investigated the voltage degradation of HT-PEM fuel cells operating at 200 degrees C under continuous load conditions and during start-stop cycling. The results showed relatively high degradation rates, but with decreasing average degradation rates over cycles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Biochemistry & Molecular Biology
Igor I. Ponomarev, Dmitry Y. Razorenov, Kirill M. Skupov, Ivan I. Ponomarev, Yulia A. Volkova, Konstantin A. Lyssenko, Anna A. Lysova, Elizaveta S. Vtyurina, Mikhail I. Buzin, Zinaida S. Klemenkova
Summary: High molecular weight film-forming pre-polymers were obtained by polyamidation for the first time and then thermal cyclization to form N-methoxyphenyl substituted polybenzimidazoles for proton-conducting membrane in HT-PEM fuel cells. The self-phosphorylation of PBI membranes during operation significantly increased proton conductivity, reaching 100 mS/cm, and improved the current-voltage characteristics, achieving a peak power of 680 mW/cm(2) at 180°C, surpassing the commercial standard. This approach can reduce the cost and ensure the environmental friendliness of PBI membrane production.
Review
Polymer Science
Sivasubramaniyan Neelakandan, Li Wang, Boping Zhang, Jiangpeng Ni, Meishao Hu, Chunmei Gao, Wai-Yeung Wong, Lei Wang
Summary: Recent progress in branched polymer membranes as electrolyte materials for proton exchange membrane fuel cells has shown improved chemical stability, proton conductivity, and good solubility. The branching degree and the structure of the branching agent are essential factors in determining the characteristics of the polymer membranes.
Review
Chemistry, Physical
Erli Qu, Xiaofeng Hao, Min Xiao, Dongmei Han, Sheng Huang, Zhiheng Huang, Shuanjin Wang, Yuezhong Meng
Summary: This review summarizes the recent progress in high temperature proton exchange membranes (HT-PEMs), focusing on phosphoric acid doped polybenzimidazoles (PBIs) and non-PBI based proton conducting polymers as promising materials. The challenges and future directions for further development of HT-PEMs are also addressed.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Yaping Jin, Xuefu Che, Yixin Xu, Jianhao Dong, Chao Pan, David Aili, Qingfeng Li, Jingshuai Yang
Summary: Development of high temperature polymer electrolyte membranes is crucial for advanced energy conversion and storage technologies. In this study, a new imidazolium type ionic liquid was synthesized and used to modify a polymer membrane, resulting in improved solubility and proton conductivity. The modified membrane exhibited excellent performance at high temperature, achieving a high power density.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Energy & Fuels
Khadijeh Hooshyari, Hamidreza Rezania, Vahid Vatanpour, Mohadese Rastgoo-Deylami, Hamid Reza Rajabi
Summary: This study focused on the synthesis of SPEKIS and preparation of new nanocomposite blend membranes using ZnS FQDs to enhance the proton conductivity and fuel cell performance of PBI membranes. The interactions between thiazole rings and functional groups of SPEKIS and ZnS FQDs, along with PBI groups, were shown to improve the proton conductivity. The best fuel cell performance was achieved with the SPEKIS/PBI/ZnS FQDs nanocomposite blend membranes, demonstrating promising potential for high-temperature fuel cells.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Chemical
Ping-Yen Chen, Tse-Han Chiu, Fan-Jie Lin, Jyh-Chien Chen
Summary: Two novel tetraamines have been synthesized, and polybenzimidazoles with outstanding thermal stability, solubility, and oxidative stability have been prepared. The resulting membranes exhibit excellent tensile strength, proton conductivity, and peak power density, making them promising candidates for high-temperature proton exchange membrane fuel cell (HT-PEMFC) applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Mostofa Shamim, Kausik Dana
BULLETIN OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Ceramics
Somnath Sinhamahapatra, Kausik Dana, Sunanda Mukhopadhyay, Himansu Sekhar Tripathi
CERAMICS INTERNATIONAL
(2019)
Article
Polymer Science
Balakondareddy Sana, Anupam Das, Tushar Jana
Article
Polymer Science
Billa Narasimha Rao, P. U. Sastry, Tushar Jana
EUROPEAN POLYMER JOURNAL
(2019)
Article
Chemistry, Applied
B. Satheesh Kumar, Balakondareddy Sana, G. Unnikrishnan, Tushar Jana, K. S. Santhosh Kumar
REACTIVE & FUNCTIONAL POLYMERS
(2020)
Article
Polymer Science
Moumita Dhara, Nitai Giri, B. Narasimha Rao, A. K. Patra, P. U. Sastry, Mahesh Shrikishan Ingole, Tushar Jana
EUROPEAN POLYMER JOURNAL
(2020)
Article
Materials Science, Characterization & Testing
Rambabu Koyilapu, Shuvra Singha, Balakondareddy Sana, Tushar Jana
Article
Materials Science, Ceramics
Madhuchhanda Sarkar, Kausik Dana
Summary: The study investigated the influence of replacing Metakaolin with red ceramic waste in geopolymer formulation on geopolymerization and properties. Results showed that moderate replacement of red ceramic waste can improve compressive strength of geopolymer mortars, but excessive replacement leads to a significant decrease in strength.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
P. Das, S. Sinhamahapatra, K. Dana, S. Mukhopadhyay
CERAMICS INTERNATIONAL
(2020)
Article
Engineering, Electrical & Electronic
Debanwee Ghosh, Nilotpal Choudhury, S. Balaji, Kausik Dana, Anirban Dhar
Summary: This study reports the synthesis of Tm2O3-doped Lu2O3 nanoparticles using a homogeneous co-precipitation method and characterizes its material/optical properties. The research found that the particle size steadily increased with increasing calcination temperature, and the photoluminescence spectra exhibited characteristic Tm emission peaks, demonstrating the potential of the synthesized material for eye-safe laser applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Madhuchhanda Sarkar, Kausik Dana
Summary: The study investigated the intercalation of different cation exchange capacity (CEC) montmorillonite clays with dialkyl ammonium cations of varying alkyl chain lengths. The results showed that the basal spacing of intercalated clays increased with longer alkyl chain lengths. The arrangement of the intercalated cations changed from flat bilayer to paraffinic, and the highest CEC clay showed the greatest expansion in the clay interlayer. The conformation of the intercalated ammonium cations also changed with longer alkyl chain lengths, indicating greater ordered conformations.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
Dipanjan Karmakar, Nilotpal Choudhury, Sultan Khan, Kausik Dana, Kalyandurg Annapurna, Deepak Jain, Mukul Chandra Paul, Anirban Dhar
Summary: In this study, Yb3+-activated Lu2O3 nanoparticles were synthesized using the homogeneous coprecipitation method and their material and optical properties were characterized. Five different samples were synthesized with different concentrations of Cetyl Trimethyl Ammonium Bromide (CTAB) as a cationic surfactant and different Yb-Lu ratios in the presence/absence of aluminium (Al) as an additional dopant, followed by calcination at different temperatures. The synthesized nanoparticles exhibited Yb absorption and emission peaks without interference with Lu2O3. The emission intensity and fluorescence lifetime of the nanoparticles depended on the Yb concentration, average particle size, and presence of aluminium as a co-dopant. An optical preform was developed using the synthesized nanoparticles as the Yb source through modified chemical vapor deposition (MCVD) coupled with solution doping (SD) technique, and the initial performance of the preform was reported.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
Sudipta Goswami, Shubhankar Mishra, Kausik Dana, Ashok Kumar Mandal, Nitai Dey, Prabir Pal, Biswarup Satpati, Mrinmay Mukhopadhyay, Chandan Kumar Ghosh, Dipten Bhattacharya
Summary: Room-temperature magnetoelectric multiferroicity is observed in c-axis oriented GaFeO3 thin films grown on (100)Si substrates. The films exhibit both epitaxial and chemical strain, resulting in the formation of finer magnetic domains and a large magnetoelectric coupling. The presence of both smaller and larger magnetic domains is confirmed by magnetic force microscopy. The strong multiferroicity of these epitaxial GaFeO3 thin films on (100)Si substrates opens up opportunities for integration with Si-based electronics.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Ceramics
Somnath Sinhamahapatra, Paromita Das, Kausik Dana, Himanshu Shekhar Tripathi
Summary: Magnesium aluminate (MA) is a rare spinel material with advantageous properties. Due to its scarcity in nature, it needs to be synthesized. This review discusses the crystal structure, synthesis methods, properties, and applications of MA.
TRANSACTIONS OF THE INDIAN CERAMIC SOCIETY
(2022)
Article
Polymer Science
Satheesh Kumar B, Balakondareddy Sana, G. Unnikrishnan, Tushar Jana, Santhosh Kumar K. S.
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.