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
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
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
Chemistry, Physical
Qingting Liu, Yuqing Luo, Shoukun Yang, Yuyue Xiong, Rongxin Wang, Xudong Fu, Rong Zhang, Shengfei Hu, Xujin Bao, Chenxi Xu
Summary: A novel transfer-free in-situ method was developed to prepare poly(2,5-benzimidazole)-grafted electrolytic graphene oxide (ABPBI-EGO) composites for high-temperature proton exchange membrane (PEM) fuel cells. By constructing fast proton-conducting channels through single or few-layered GO nanosheets, the composite membranes exhibited superior proton conductivities over the temperature range of 120-180 degrees C. The ABPBI-0.5EGO composite membrane-based fuel cell achieved significantly higher power density compared to the original ABPBI membrane, showing promise for developing high-performance HT-PEMs.
JOURNAL OF POWER SOURCES
(2023)
Article
Biochemistry & Molecular Biology
Raja Rafidah Raja Sulaiman, Rashmi Walvekar, Wai Yin Wong, Mohammad Khalid, Ming Meng Pang
Summary: Graphene oxide plays a crucial role in high-temperature proton exchange membrane fuel cells, and this study compared the effects of sulfonated graphene oxide and phosphonated graphene oxide on the properties of polybenzimidazole membranes, with phosphonated graphene oxide showing superior performance in enhancing proton conductivity.
Article
Engineering, Chemical
Zhuang Rao, Minqiu Lan, Deyu Zhu, Lipei Jiang, Zhengyun Wang, Huihai Wan, Beibei Tang, Hongfang Liu
Summary: This study investigated the potential of one-dimensional and two-dimensional nanomaterials as proton conduction accelerators. Functionalized nanotubes and graphene oxide showed improved proton conductivity and enhanced proton transfer pathways in the codoped proton exchange membrane, leading to significant enhancement in proton conductivity and peak power density.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Energy & Fuels
Eunji Kim, Seunghwan Song, Seoeun Choi, Jung Ock Park, Junghwan Kim, Kyungjung Kwon
Summary: The study compares MEA systems using different membranes, analyzes the evolution and impact of parameters, simulates optimal performance, and predicts MEA performance.
Article
Polymer Science
Xuhui Zhao, Bohua Nan, Yunhua Lu, Chunyan Zhao, Shiai Xu
Summary: A novel PGO-reinforced PBI composite membrane with high tensile strength and excellent proton conductivity has promising applications in high-temperature proton exchange membrane fuel cells.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Engineering, Chemical
Jian Wang, Guoliang Liu, Ailian Wang, Wenxi Ji, Longgui Zhang, Taoyi Zhang, Jing Li, Hongfei Pan, Haolin Tang, Haining Zhang
Summary: Development of a simple synthetic strategy for polybenzimidazole-based membranes with high uptake and retention ability of phosphoric acid is crucial for long-term practical applications of high temperature proton exchange membrane fuel cells. In this study, N, N-dimethylacetamide was used as a deacid reagent and solvent for the synthesis of imidazolium cations-grafted polybenzimidazole. The resulting membranes exhibited improved phosphoric acid uptake and retention ability compared to pristine polybenzimidazole membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Gongyi Wei, Yuwei Liang, Shichao Wang, Peng Wang, Jinwu Peng, Bibo Yin, Lei Wang
Summary: This study successfully constructed different porous structures in high-temperature membranes using copper(II) oxide nanowires and nanoparticles as templates. The results indicate that constructing continuous porous proton-transfer channels positively affects the performance of membrane fuel cells, and using nanowires allows for more effective channels at lower template content.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Gongyi Wei, Yuwei Liang, Shichao Wang, Peng Wang, Jinwu Peng, Bibo Yin, Lei Wang
Summary: This study used copper(II) oxide nanowires and nanoparticles as porogens to construct proton-transfer channels in high-temperature membranes. Membranes with different porous structures were successfully prepared. The results showed that continuous porous proton-transfer channels improved the performance of membrane fuel cells, and nanowires were more effective than nanoparticles.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Chemical
Yang Jiao, Mengdi Liu, Qi Wu, Peijun Zheng, Wei Xu, Bangjiao Ye, Hongjun Zhang, Ruilan Guo, Shuangjiang Luo
Summary: In this study, high-performance polybenzimidazole (PBI) membranes were developed with well-defined microporosity and size-sieving ability for helium and hydrogen recovery. The incorporation of hierarchical triptycene units and polyprotic acid doping resulted in significantly enhanced gas permeability and selectivity compared to previous PBI membranes. The triptycene-based polybenzimidazole (TPBI) composite membranes exhibited the highest gas selectivities among existing polymeric gas separation membranes, making them highly attractive for helium and hydrogen separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Donglin He, Guoliang Liu, Ailian Wang, Wenxi Ji, Jianing Wu, Haolin Tang, Weiran Lin, Taoyi Zhang, Haining Zhang
Summary: This study fabricates high-temperature proton exchange membranes with high phosphoric acid uptake and retention ability by solvent casting, which exhibit high anhydrous proton conductivity and stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Textiles
Jing Zhao, Xiangqing Duan, Di Song, Jing Jia, Ning Wang, Yangyang Jing, Quantong Che
Summary: This study proposed a novel strategy for constructing anhydrous proton conductive aramid membranes by grafting Kevlar micro-fibrils with phosphoric acid, ensuring fine performance in proton conduction processes. The introduction of PA molecules in the structure proved to be more effective in constructing conductive membranes compared to other strategies. This research shows promising potential in the preparation of membrane electrolytes and provides a facile method for developing efficient proton conductive aramid membranes.
FIBERS AND POLYMERS
(2021)
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
Materials Science, Multidisciplinary
Santosh Khanal, Yunhua Lu, Dandan Jin, Shiai Xu
Summary: In this study, LDHs were combined with IFR to prepare flame retardant high density polyethylene composites, showing improved thermal and flame retardant properties. The LDHs resulted in reduced PHRR in the composites, compact char residue with high graphitic degree, but no significant increase in tensile strength.
FIRE AND MATERIALS
(2022)
Article
Polymer Science
Ran Wang, Shiai Xu
Summary: In this study, transparent powder with a refractive index similar to PVC was used as filler to prepare PVC composite film with high transparency. The modified powder significantly improved the mechanical properties and transparency of the PVC composite film, with optimal loading at 7.5 phr.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Santosh Khanal, Yunhua Lu, Li Dang, Shiai Xu
Summary: The use of layered nanomaterials in combination with intumescent flame retardant provides an excellent means of preparing high-performance flame retardant composites, with P-MMT showing better performance in reducing peak heat release rate compared to A-MMT.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Applied
Li Gao, Dandan Jin, Yunhua Lu, Santosh Khanal, Shiai Xu
Summary: In this study, titanium dioxide-loaded layered double hydroxides were synthesized and used as thermal and light stabilizers for PVC. The resulting composite exhibited excellent thermal stability and UV-shielding property, significantly improving the thermal stability and anti-UV aging performance of PVC.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Chemistry, Applied
Jinzhi Han, Mucun Zhang, Haiqi Zhang, Hongming Liu, Shiai Xu
Summary: In this study, a novel environmentally friendly plasticizer AETBC was synthesized and used to plasticize PVC. The plasticized PVC showed improved mechanical properties and migration stability compared to commonly used plasticizers like DOP, TBC, and ATBC. AETBC also enhanced the thermal stability of PVC.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Chemistry, Applied
Li Gao, Dandan Jin, Yunhua Lu, Shiai Xu
Summary: By incorporating nanomaterials loaded with TiO2@ZnAlSn and PETMP into plasticized PVC composites, this study successfully improved the mechanical properties, thermal stability, flame retardancy, and smoke suppression of the composites. Experimental and theoretical investigations provided evidence for the effectiveness of this approach.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Polymer Science
Guoliang Pang, Miao Yi, Xin Yin, Wenliang Wu, Shiai Xu
Summary: In this study, ultraviolet-induced graft polymerization combined with wet chemical treatment was used to immobilize chitosan (CS) onto the surface of polyether ether ketone (PEEK). The grafting degree of CS could be controlled by adjusting the CS solution concentration, and CS-grafted PEEK exhibited higher hydrophilicity compared to unmodified PEEK. Furthermore, the CS-grafted PEEK demonstrated good antibacterial activity.
IRANIAN POLYMER JOURNAL
(2022)
Article
Chemistry, Analytical
Lei Ma, Qiuyan Bi, Yuanhui Tang, Chao Zhang, Fuju Qi, Hao Zhang, Yifan Gao, Shiai Xu
Summary: A positively charged nanofiltration (NF) membrane was prepared by depositing polydopamine-coated graphitic carbon nitride as the interlayer and carrying out interfacial polymerization. This membrane showed good separation performance and fouling resistance for lithium recovery from brine.
Article
Polymer Science
Jiajun Xu, Shiai Xu
Summary: This study developed a chromate-free method for surface modification of aluminum foil using polydopamine functionalization after titanium chemical conversion in response to the need for increased adhesive strength and durability of the adhesive joint in the Al/polymer laminated film of soft package lithium-ion battery. The results showed that the amine and catechol groups of the polydopamine improved the interfacial adhesion between the adhesive and aluminum foil by enhancing wettability and interfacial interaction.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jiyuan Liu, Rui Yuan, Qi Sang, Li Dang, Li Gao, Benhua Xu, Shiai Xu
Summary: This study investigates the effects of acetylation modification on the plasticization properties of citrates and provides insights into the underlying mechanisms using experimental and molecular dynamics simulation approaches. The results show that acetylated citrates have better plasticizing efficiency compared to non-acetylated citrates. The study also explores the toxicity of acetylated citrates. Overall, this research contributes to a better understanding of the plasticizing mechanisms of citrates and proposes an optimized citrate structure with higher performance.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Rujie Li, Shiai Xu, Jiajun Xu, Tongtong Pan, Beibei Sun, Li Dang
Summary: The poor processing and rheological properties of highly filled composites caused by the high loading of fillers can be improved with the use of maleic anhydride grafted polyethylene wax (PEWM) as compatibilizer and lubricant. Two PEWMs with different molecular weights were synthesized and characterized. The addition of PEWM significantly improved the processability and fluidity of the composites, while reducing viscosity. However, both PEWM and polyethylene wax (PEW) had adverse effects on flame retardancy.
Article
Polymer Science
Rujie Li, Beibei Sun, Li Dang, Tongtong Pan, Jiajun Xu, Shiai Xu
Summary: The addition of maleic anhydride grafted polypropylene (MAPP) with high melt flow index (MFI) improves the processability and flowability of magnesium hydroxide (MH)/linear low-density polyethylene (LLDPE) composites, leading to a reduction in viscosity and the formation of a transition layer. In addition, the simultaneous addition of MH and MAPP has a synergistic smoke suppression effect.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Xiao-Tong Su, Guo-Cheng Jin, Shi-Ai Xu
Summary: In this study, a tissue adhesive with excellent mechanical properties, tissue affinity, antibacterial properties, and coagulation performances was prepared by incorporating MPEG-co-PCL and SNPs into BCA. The optimal formulation showed significantly improved adhesion strength, flexibility, and antibacterial properties compared to BCA alone. This work provides an effective strategy for developing adhesives with potential clinical applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Xiaofei Sun, Mucun Zhang, Haiqi Zhang, Hongming Liu, Shiai Xu
Summary: In this study, the mechanical properties of PVC gloves were improved by incorporating modified fillers. The n-Octadecyl mercaptan-modified CaCO3/PVC composite films showed higher light transmittance, lower moisture permeability, and higher tensile properties, making them suitable for low-temperature conditions.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Beibei Sun, Li Dang, Qiuyan Bi, Rujie Li, Qiuhui Gong, Zhihao Wan, Shiai Xu
Summary: In this study, maleic anhydride-modified polymers were used as bulking agents to improve the processing and mechanical properties of highly filled composites. The addition of the compatibilizer significantly enhanced the mechanical properties of the composites, but had a negative impact on their flame retardancy.