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
Chemistry, Physical
Aogui Wu, Jianfa Liu, Jinzhen Huang, Yu Min, Yitong Wang, Shichao Wang, Lei Wang
Summary: Constructing high-density hydrogen bonding networks is important for improving the proton conductivity of proton exchange membranes (PEMs) and the single-cell output power of high-temperature fuel cells (HTFCs). In this study, a series of benzimidazole polymers containing a pyridine group were successfully synthesized via copolymerization. The high-density hydrogen network was constructed by blending different polymers and using a cross-linking agent. The results showed significantly enhanced proton conductivity and output power density of the single cell.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Erli Qu, Min Xiao, Dongmei Han, Sheng Huang, Zhiheng Huang, Wei Liu, Shuanjin Wang, Yuezhong Meng
Summary: A semi-aromatic polybenzimidazole (DPBI) was synthesized and a crosslinked DPBI membrane (DPBI-xPVBC) was obtained by adding poly((vinylbenzyl chloride) (PVBC) as a macromolecular crosslinker. The DPBI-xPVBC membrane exhibited excellent antioxidative stability, high proton conductivity, and enhanced mechanical strength compared to the pristine DPBI membrane. Furthermore, the PA-doped DPBI-10PVBC membrane showed improved performance in terms of proton conductivity and H-2/O-2 single cell power density, demonstrating the effectiveness of in-situ crosslinked DPBI with PVBC as a macromolecular crosslinker for high performance HT-PEMFCs.
Article
Environmental Sciences
Kuan Shiong Khoo, Wen Yi Chia, Kexin Wang, Chih-Kai Chang, Hui Yi Leong, Muhammad Nasrulhazim Bin Maaris, Pau Loke Show
Summary: This review summarizes the application of ionic liquids in high-temperature proton exchange membrane fuel cells, discusses their advantages when combined with polybenzimidazole, and evaluates and discusses the research development and issues of ILs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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
Jinyi He, Tianhui Li, Yingying Liu, Ao Wang, Wenxing Jiang, Chengwei Deng, Junbo Hou, Xiaodong Zhuang, Junliang Zhang, Changchun Ke
Summary: This study investigates the influence of impurities in industrial 3,3'-diaminobenzidine (DAB) on the synthesis of polybenzimidazole (PBI) and explores the possibility of synthesizing PBI using purified low cost & high impurity industrial DAB. The results show that impurities adversely affect the properties of PBI, but the performance can be improved using a purification method. The application performance of PBI synthesized using purified industrial DAB in HT-PEMFC is evaluated.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
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)
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.
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, Multidisciplinary
Ping Xiong, Sangshan Peng, Leyuan Zhang, Aimin Li, Yuyue Chen, Sisi Xiao, Qing He, Guihua Yu
Summary: In this work, a pseudo-nanophase separation strategy enabled by supramolecular interactions was utilized to construct fast and selective ion-transport channels in polymeric membranes. The simplified membrane preparation process and protection of the polymer backbone from chemical degradation resulted in high-performance membranes for aqueous acidic redox flow batteries (RFBs), exhibiting high efficiency and good cycling stability.
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)
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
Chemistry, Multidisciplinary
Li-Cheng Jheng, Afira Ainur Rosidah, Steve Lien-Chung Hsu, Ko-Shan Ho, Chun-Jern Pan, Cheng-Wei Cheng
Summary: Carbon nanofibers functionalized with aminobenzoyl groups were prepared and incorporated into hexafluoroisopropylidene-containing polybenzimidazole (6FPBI) composite membranes. The functionalized CNFs showed better mechanical reinforcement and acid doping level improvement for the nanocomposite membranes compared to pristine CNF. SEM observation confirmed the good compatibility between the CNF-aminobenzoyl fillers and the 6FPBI matrix, leading to enhanced physicochemical properties.
Article
Engineering, Chemical
Yutong Zhao, Bo Lv, Wei Song, Jinkai Hao, Junfang Zhang, Zhigang Shao
Summary: Traditional high-temperature proton exchange membranes using phosphoric acid (PA) as a proton conductor have limitations such as PA loss, poor mechanical stability, and catalyst poisoning. This study investigated the use of solid acids as an alternative to PA and prepared two composite membranes to examine the effects of the structure of polybenzimidazole (PBI) on the anchoring of solid acids. The results showed that the CsH5(PO4)2-doped membranes had excellent mechanical properties and the CsH5(PO4)2 was uniformly dispersed on the surface and cross-section of both membranes, facilitating the formation of proton transport channels.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Polymer Science
Balakondareddy Sana, Rambabu Koyilapu, Sengottuvelu Dineshkumar, Athianna Muthusamy, Tushar Jana
JOURNAL OF POLYMER RESEARCH
(2019)
Article
Polymer Science
Shuvra Singha, Rambabu Koyilapu, Kausik Dana, Tushar Jana
Article
Polymer Science
Billa Narasimha Rao, Kuruma Makappa, Nagendra Kumar, Tushar Jana
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
Polymer Science
B. Satheesh Kumar, Balakondareddy Sana, G. Unnikrishnan, Tushar Jana, K. S. Santhosh Kumar
JOURNAL OF APPLIED POLYMER SCIENCE
(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
Review
Polymer Science
Shuvra Singha, Mikael S. Hedenqvist
Article
Polymer Science
Satheesh Kumar B, Balakondareddy Sana, G. Unnikrishnan, Tushar Jana, Santhosh Kumar K. S.
Article
Nanoscience & Nanotechnology
Baku Nagendra, Angel Mary Joseph, Balakondareddy Sana, Tushar Jana, E. Bhoje Gowd
ACS APPLIED NANO MATERIALS
(2018)
Proceedings Paper
Polymer Science
Konda Reddy Kunduru, Billa Narasimha Rao, Tushar Jana
MACROMOLECULAR SYMPOSIA
(2018)
Article
Chemistry, Multidisciplinary
Bikash Kumar Sikder, Tushar Jana
Article
Chemistry, Physical
Kuruma Malkappa, Billa Narasimha Rao, Gandham Suresh, Ch. Venkata Ramana, Tushar Jana
COLLOID AND POLYMER SCIENCE
(2018)
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.