Article
Polymer Science
Niamh Bayliss, Gokhan Yilmaz, Alexander Plucinski, C. Remzi Becer, Bernhard V. K. J. Schmidt
Summary: Aqueous two-phase systems (ATPS) have gained attention in polymer chemistry due to their biocompatibility and applications in biomaterials and biology. This study investigated ATPS formed from poly(N,N-diethylacrylamide) (PDEA) with dextran and poly(ethylene glycol), and observed a significant shift in PDEA's cloud point temperature in the ATPS compared to pure aqueous solutions. This effect on thermoresponsive behavior opens up new possibilities for water-based polymer systems in areas such as multicompartment hydrogels or biotechnology.
Article
Nanoscience & Nanotechnology
Simadri Badatya, Dhiraj Kumar Bharti, Natarajan Sathish, Avanish Kumar Srivastava, Manoj Kumar Gupta
Summary: The study successfully prepared PVDF-CNT foam material, achieving the goal of converting mechanical energy into electricity for the first time. The foam exhibited high piezoelectric output performance and good moisture resistance, generating high voltage output even under small pressure, demonstrating potential application prospects.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Alexander Plucinski, Marko Pavlovic, Mairi Clarke, David Bhella, Bernhard V. K. J. Schmidt
Summary: The study investigated the aggregation behavior of high molar mass block copolymer in an organic solvent, revealing unprecedented behavior under specific conditions. Potential future applications in photonics and templating of inorganic structures were envisioned for this new thermo-responsive block copolymer.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Polymer Science
Julie Stastna, Vladislav Ivaniuzhenkov, Lenka Hanykova
Summary: The combination of swelling experiments and NMR spectroscopy was used to investigate the sensitivity of hydrogels with a single- and double-network structure to various stimuli. The behavior of the double network was found to be significantly affected by the introduction of the second component and the formation of the interpenetrating structure.
Article
Chemistry, Multidisciplinary
Omita Nanda, Nidhi Gupta, Ashok M. Biradar, Kanchan Saxena
Summary: This study investigates the effect of humidity on the electrical properties of different conductivity grades of PEDOT:PSS polymers and their nanocomposites with SWCNT. It was found that the resistance of pristine low and high conductivity grade PEDOT:PSS films show opposite trends with respect to humidity, while this trend reverses in their nanocomposites containing CT-SWCNT. This research provides valuable information for researchers in the field of polymer nanocomposite based devices and applications.
Article
Chemistry, Physical
Biaolan Liu, Xiaoshuang Yan, Zhihui Zhao, Jian Wang, Jiwen Feng
Summary: The solvation behaviors and intermolecular interactions of PDEA gel network in water/DMSO and water/acetone mixtures were investigated. Unlike PNIPAM gel, distinct phase transition behaviors were observed for PDEA gel, which are attributed to the different polymer-cosolvent interactions in water/acetone and water/DMSO systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Mitsuhiro Matsumoto, Taka-Aki Asoh, Tatsuya Shoji, Yasuyuki Tsuboi
Summary: This study demonstrates liquid-liquid phase separation of a thermoresponsive polymer through near-infrared laser-induced coacervation and coil-to-globule phase transition. By focusing a laser beam, single polymer microdroplets can be formed and trapped at the focal point, allowing for selective analysis. The results indicate that PDEA undergoes dehydration and coacervation in addition to a coil-to-globule phase transition.
Article
Materials Science, Composites
Carlos Bruno Barreto Luna, Eduardo da Silva Barbosa Ferreira, Danilo Diniz Siqueira, Edcleide Maria Araujo, Emanuel Pereira do Nascimento, Eliton Souto Medeiros, Tomas Jeferson Alves de Melo
Summary: In this study, toughened and electrical nanocomposites of polyamide 6 (PA6)/acrylonitrile-butadiene-styrene (ABS) were prepared and compatibilized with maleic anhydride-grafted acrylonitrile-butadiene-styrene (ABS-MA). Functionalized multi-walled carbon nanotubes (MWCNTf) were used as conductive nanofillers. The developed nanocomposites exhibited improved mechanical, electrical, and thermomechanical properties, showing great technological potential for application in antistatic packaging.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Xiangming Fu, Yanqiu Wang, Liang Xu, Atsushi Narumi, Shin-ichiro Sato, Xiande Shen, Toyoji Kakuchi
Summary: A method for the sequential organocatalyzed polymerizations of vinyl-based and lactone-based monomers using GTP and ROP was developed to synthesize thermoresponsive amphiphilic diblock copolymers. The organocatalysts were switched between the two stages, enabling a one-pot synthesis. The resulting diblock copolymers consist of poly(N,N-diethylacrylamide) and biodegradable polyesters (poly(epsilon-caprolactone), poly(trimethylene carbonate), and poly(l-lactide)) in various ratios. The aqueous solutions of these block copolymers below their T-cp were characterized, showing a close relationship between their structures, T-cp, and micellar forming properties below the T-cp.
Article
Chemistry, Physical
Di Zhou, Ling-Shu Wan, Zhi-Kang Xu, Kenji Mochizuki
Summary: Raman-MCR was used to study the changes in the hydration shell around poly(N,N-diethylacrylamide) (PDEAM) upon heating, compared to poly(N-isopropylacrylamide) (PNIPAM). It was found that PDEAM has a less-ordered and smaller hydration shell than PNIPAM, and that the hydration-shell structure of PDEAM is not affected by the clouding transition, allowing for coil-globule transition and aggregation of multiple chains without structural transformation of the hydration shell.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Polymer Science
Gyorgy Kasza, Timea Stumphauser, Mark Bisztran, Gyorgyi Szarka, Imre Hegedus, Endre Nagy, Bela Ivan
Summary: Responsive polymers, particularly P(DEAAm), have gained interest for advanced applications. A novel thermoresponsive copolymer, P(DEAAm-co-GMA), was successfully synthesized and shown to efficiently conjugate with enzymes to form enzyme-polymer nanoparticles with reversible thermoresponsive behavior. The copolymer's cloud and clearing points decrease linearly with increasing GMA content.
Article
Polymer Science
Hansong Liu, Yan Zhao, Fan Chen, Na Li, Mingchen Sun, Tianyi Zhang, Tianpei Sun, Kai Wang, Shanyi Du
Summary: The research focuses on improving the interface between carbon fiber and thermoplastic resin composites by using a PEI sizing involving CNTs. The results indicate that the modified CF/PEEK composites show enhanced interfacial properties and increased mechanical performance, providing insights for industrial applications of CF reinforced high-performance engineering plastic composites.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Gianluca Ciarleglio, Elisa Toto, Maria Gabriella Santonicola
Summary: In this study, conductive composite hydrogels were synthesized by embedding carboxyl-functionalized multi-walled carbon nanotubes (MWCNT-COOH) in a poly(N-isopropylacrylamide) (PNIPAM) matrix through a two-step photopolymerization method. The concentration of the carbon nanotubes was varied to obtain thermo-responsive hydrogels with controlled hydrophilicity and conductivity. The results showed that increasing the nanotube concentration shifted the endothermic peak associated with the temperature-induced volume phase transition (VPT) to higher temperatures, indicating a stronger hydrogen bond dissociation. In PBS solution, the swelling ratios and VPT temperatures were reduced, and the electrical resistivity decreased by a factor of 10 compared to water-swollen hydrogels.
Article
Chemistry, Multidisciplinary
Su Ding, Tong Yin, Shucheng Zhang, Dingyi Yang, Houlin Zhou, Shouchen Guo, Qikun Li, Yong Wang, Yang Yang, Biaolin Peng, Rusen Yang, Zhi Jiang
Summary: Carbon nanotubes and hydrophilic polymers were mixed to form a composite, which resulted in humidity sensors with high response and fast response/recovery time. The sensors showed strong adhesion and bending durability, and were able to monitor human breathing, detect finger movements, and handshaking.
Article
Materials Science, Composites
Fuyou Ke, Xiao Yang, Meirong Zhang, Ye Chen, Huaping Wang
Summary: PEI composite fibers were successfully prepared using ionic liquids and carbon nanotubes. The combination of these materials improved the tensile strength and antistatic properties of the fibers, leading to enhanced overall performance.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.
