Article
Materials Science, Multidisciplinary
Sonal Gupta, Udit Acharya, Hana Pistekova, Oumayma Taboubi, Zuzana Moravkova, Martina Kasparova, Petr Humpolicek, Patrycja Bober
Summary: The study investigated a one-step preparation of polypyrrole (PPy) assisted by an organic dye, acriflavine hydrochloride (AF), resulting in the development of PPy nanofibers with enhanced conductivity and capacitance, as well as improved antibacterial properties. The interaction between AF and PPy was confirmed by structural analysis, making the PPy tuned by an organic dye suitable for applications requiring both electroconductivity and antibacterial activity, such as wound healing, electrochemical sensors, and regenerative medicine.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Fatemeh Imani, Reza Karimi-Soflou, Iman Shabani, Akbar Karkhaneh
Summary: Neural tissue engineering scaffold containing polylactic acid (PLA) nanofibers, gelatin, and polypyrrole (PPy) was fabricated to combine electrospun nanofibers’ topography benefits with the versatile advantages of gelatin and PPy. The results revealed that scaffolds containing 15 and 20% polypyrrole could provide acceptable conditions for the adhesion and growth of nerve cells and can be introduced as a promising scaffold in nerve tissue engineering applications.
Review
Chemistry, Physical
Tomasz Jarosz, Przemyslaw Ledwon
Summary: The passage details the characteristics, biological activity, and applications of polypyrrole, focusing on the variety of copolymers and their material properties that can be produced electrochemically.
Article
Chemistry, Applied
Meiling Zhang, Shuai Jiang, Fuyi Han, Mengmeng Li, Ni Wang, Lifang Liu
Summary: The study successfully synthesized a recoverable, anisotropic cellulose nanofiber/chitosan aerogel with excellent properties such as deformation recovery ability, ultra-low density, high temperature-invariant, and high porosity. The composite aerogel demonstrated outstanding thermal insulation properties and oil absorption capacity, making it a potential material for thermal management and oil absorption applications.
CARBOHYDRATE POLYMERS
(2021)
Article
Materials Science, Paper & Wood
Lingling Fan, Wenfeng Zheng, Yuan Yang, Yan Sun, Songlin Peng, Jie Xu, Guangfu Yin
Summary: Bacterial cellulose/polypyrrole nanofibrous composites have been extensively studied for supercapacitors due to their large specific surface area and excellent tensile strength. However, the structural pulverization of polypyrrole leads to inferior cycling stability. In this study, nanofibrous composite membranes of MXene, PPy, and oxidized bacterial cellulose were prepared for flexible supercapacitor electrodes, showing enhanced performance.
Article
Polymer Science
Yulia I. Denisova, Georgiy A. Shandryuk, Marianna P. Arinina, Ivan S. Levin, Vsevolod A. Zhigarev, Maria L. Gringolts, Eugene Sh. Finkelshtein, Alexander Ya. Malkin, Yaroslav V. Kudryavtsev
Summary: By adjusting reaction conditions, a series of multiblock copolymers with different compositions and lengths can be synthesized to study their structure, thermal properties, and mechanical properties. The results show that even nearly random copolymers can retain some crystalline structure.
Article
Electrochemistry
Wenlong Luo, Yue Sun, Yongqin Han, Jianxu Ding, Tingxi Li, Chunping Hou, Yong Ma
Summary: MXene/polypyrrole (M-PPy) composite films were fabricated by vacuum-assisted suction filtration, and the optimized M-PPy3 exhibited high capacitance and excellent cycling performance. The flexible M-PPy3//MnO2 asymmetric supercapacitor showed high capacitance retention even after 6000 charge/discharge tests, demonstrating remarkable energy storage capacity. This study provides a better electrode structure for MXene and demonstrates its application in flexible wearable devices.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Ahmad A. Shamsabadi, Hui Fang, Danzhen Zhang, Anupma Thakur, Cindy Y. Y. Chen, Aixi Zhang, Haonan Wang, Babak Anasori, Masoud Soroush, Yury Gogotsi, Zahra Fakhraai
Summary: MXenes are 2D transition-metal carbides and nitrides with excellent electrical conductivity and unique optical properties. However, they tend to oxidize under ambient conditions, especially when heated. The intercalation of water also accelerates oxidation through hydrolysis. By using in situ spectroscopic ellipsometry (SE), the optical properties of three types of MXenes (Ti3C2Tx, Mo2TiC2Tx, and Ti2CTx) with different composition and atomic structures are characterized to investigate their thermal degradation. It is found that changes in MXene extinction and optical conductivity in the visible and near-IR regions correlate well with the amount of intercalated water and hydroxyl termination groups, as well as the degree of oxidation.
Article
Materials Science, Composites
Wen-yan Wang, Xiao Ma, Jing-hui Yang, Xiao-dong Qi, Yan-zhou Lei, Yong Wang
Summary: This study proposed an efficient method to construct thermal conductive paths in epoxy composites at extremely low filler content, achieving enhanced thermal conductivity and fracture toughness simultaneously. By coating PVP-modified carbon nanofibers on the 3D framework surface of melamine foam, the composites exhibited improved comprehensive properties with significantly enhanced thermal conductivity and fracture toughness.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Ying-Chuan Lin, Chieh-Tsung Lo
Summary: Electrospun carbon fibers were chemically activated using various KOH/carbon weight ratios and activation times. Activation increased the quantity of functional groups on the fiber surface and improved the electrode-electrolyte affinity, resulting in low charge-transfer resistance. However, excessive activation led to the destruction of fiber structure.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ying-Chuan Lin, Chieh-Tsung Lo
Summary: Electrospun carbon fibers were chemically activated using KOH to create porous structures and increase surface functionalities. This enhanced the affinity between the electrode and electrolyte, resulting in reduced charge-transfer resistance. However, excessive activation destroyed the internal structure of the fibers. Electrochemical testing showed that porosity parameters had a stronger impact on the specific capacitance than surface functionalities.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Jingping Wang, Jinan Cao, Youlong Xu, Haixia An, Xifei Li
Summary: This study presents a simple electro-polymerization method to fabricate flexible PPy films coated on PPy nanotubes, which can be used as flexible electrodes for supercapacitors. The optimized kinetics for ion transportation result in a significantly increased mass specific capacitance of the flexible porous PPy films. The flexible porous PPy films also exhibit minimal capacitance fading after 10,000 cycles due to the large free space for volume change.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Zhen Qin, Ziwen Wang, Dan Li, Biao Zhao, Yuhuan Lv, Kai Pan
Summary: A novel nanoparticle-reinforced graphene aerogel with improved mechanical properties has been developed in this study. The assembled flexible piezoresistive sensor and the high-efficiency oil/water separation performance of the porous graphene aerogel demonstrate its broad application prospects.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Polymer Science
Valentina Cavallo, Sebastien Pruvost, Jean-Francois Gerard, Alberto Fina
Summary: Poly(methylmethacrylate-co-methacrylic acid) (PMMA-co-MAA) polymers were synthesized with a high conversion rate of 98.5% and a final ratio of MMA/MAA equal to 63:37 mol%. These polymers were then used as a matrix for cellulose-based nanocomposites, with cellulose nanofibers (CNFs) dispersed using a solution with a mixture of solvents. The resulting transparent films of PMMA-co-MAA + CNF showed good dispersion of CNF in the matrix, leading to reinforced polymethacrylate matrix with increased tensile strength and optical transparency.
Article
Energy & Fuels
Wenhao Xu, Yunhua Lu, Haijun Chi, Hongbin Zhao, Junyi Hu, Guoyong Xiao
Summary: In this study, hydroxyl-containing polyimide (HPI) carbon nanofibers (HPICNFs) with abundant nitrogen and oxygen doping were prepared by electrospinning and thermal rearrangement. The HPICNFs showed high specific surface area and pore volume, as well as excellent electrochemical performance and cycling stability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Biomaterials
Rahul Goel, Swarita Gopal, Alka Gupta
JOURNAL OF MATERIALS CHEMISTRY B
(2015)
Article
Chemistry, Multidisciplinary
Rahul Goel, Ashwani Kumar Sharma, Alka Gupta
NEW JOURNAL OF CHEMISTRY
(2017)
Article
Biochemistry & Molecular Biology
Kriti Shivhare, Charu Garg, Ayushi Priyam, Alka Gupta, Ashwani Kumar Sharma, Pradeep Kumar
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2018)
Article
Chemistry, Physical
Shubhra Goel, Nasreen A. Mazumdar, Alka Gupta
APPLIED SURFACE SCIENCE
(2010)
Article
Chemistry, Multidisciplinary
Shubhra Goel, Nasreen A. Mazumdar, Alka Gupta
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2011)
Article
Polymer Science
Shubhra Goel, Nasreen A. Mazumdar, Alka Gupta
JOURNAL OF POLYMER RESEARCH
(2010)
Article
Polymer Science
Shubhra Goel, Nasreen A. Mazumdar, Alka Gupta
POLYMERS FOR ADVANCED TECHNOLOGIES
(2010)
Article
Materials Science, Multidisciplinary
Alka Gupta, Shubhra Goel, Ranjana Mehrotra, H. C. Kandpal
JOURNAL OF MATERIALS RESEARCH
(2007)
Article
Chemistry, Multidisciplinary
A. Gupta, S. Goel, K. P. Singh, R. Mehrotra, H. C. Kandpal
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY
(2006)
Article
Agronomy
R Mehrotra, A Gupta, J Tewari, H Chander, V Shanker
INTERNATIONAL SUGAR JOURNAL
(2006)
Article
Biology
Ranjana Mehrotra, Alka Gupta, Ajeet Kaushik, Neeraj Prakash, Hem Kandpal
INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY
(2007)
Article
Biochemistry & Molecular Biology
A Gupta, R Mehrotra, E Klimov, HW Siesler, RM Joshi, VS Chauhan
CHEMISTRY & BIODIVERSITY
(2006)
Article
Polymer Science
Zhongming Yuan, Hiroko Yamamoto, Shinji Kanehashi, Takeshi Shimomura
Summary: This study reports the synthesis of a flexible light-emitting polymer film using a solution blending method. The selective positioning of MEH-PPV molecules in the PS phase of the film was confirmed. The film exhibited a nanometer-scale luminescent domain with low aggregation quenching and showed good elastomeric characteristics.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2024)
