Article
Biotechnology & Applied Microbiology
Qianjun Long, Yunxia Zhang, Qiang Zhang, Kaibo Xu, Liqin Cao, Li Zhang
Summary: The design of multifunctional hydrogel sensor materials with comprehensive properties is discussed. A conductive, semi-interpenetrating network hydrogel was constructed using poly (vinyl alcohol), polyaniline (PANI), and poly (dimethyl diallyl ammonium chloride) (PDDA), with the assistance of the Hofmeister effect. The hydrogel exhibited excellent conductivity, mechanical strength, and sensitivity as a strain sensor material, along with temperature sensitivity, frost resistance, self-healing capability, and reusability.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Haiyan Du, Jiaying Wang, Zemin Wu, Zhubo Liu
Summary: This paper investigates the effect of ionic liquid content on the structure and properties of flexible solid-state supercapacitors. Binder-free polymer electrodes with outstanding electrochemical performance and mechanical properties were fabricated using poly (vinyl alcohol)/ionic liquid (PVA/IL) composite films as substrates. At the optimal content, the electrode demonstrated ideal capacitance and conductivity. The electrode was used to assemble a polymer supercapacitor, which exhibited excellent electrochemical performance and flexibility.
Article
Nanoscience & Nanotechnology
Lianjie Zhao, Hao Zhang, Ning Tang, Min-Hui Li, Jun Hu
Summary: Phytic acid-assisted PANi/PVA hydrogel with self-reinforcing features is developed, showing enhanced mechanical performance. Phytic acid plays a crucial role in salinizing aniline and forming hydrogen bonds with PVA, resulting in conductive PANi and structure orientation. The hydrogel exhibits improved fracture strength, Young’s modulus, and toughness after repetitive stretching, attributed to the anisotropic structures fixed by hydrogen bonds. The PVA/PA/PANi hydrogel shows good mechanical durability and reusability, making it a reliable strain sensor.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Yifan Zheng, Hong Huang, Yan Wang, Jing Zhu, Junrong Yu, Zuming Hu
Summary: This study presents a facile and low-cost design strategy for a transparent, gradient cross-linked, patternable and reprogrammable humidity-responsive actuator based on PVA. The actuator is capable of humidity-responsive ability, gradient cross-linking, and photo-controlled reversible cross-linking. It demonstrates fast actuation speed, large actuation amplitude, and complex shape deformation control.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Environmental
Wei Lyu, Jiaqiang Li, Miroslava Trchova, Guang Wang, Yaozu Liao, Patrycja Bober, Jaroslav Stejskal
Summary: In this study, three-dimensional polyaniline/poly(vinyl alcohol)/montmorillonite (PANI/PVAL/MMT) hybrid aerogels with easy separation performance and highly effective reusable adsorption on both anionic and cationic dyes were successfully fabricated by a simple in-situ polymerization method. The resulting hybrid aerogels showed a well-defined hierarchical structure with PANI nanofibers coated on the skeleton wall. The adsorption performance of the hybrid aerogels on anionic and cationic dyes was systematically studied, demonstrating their excellent adsorption capacity.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Polymer Science
Yutaka Ohsedo, Wakana Ueno
Summary: By studying the formation behavior and properties of molecular hydrogels composed of polymer hydrogelators and water-soluble polymers, this research discovered a new type of molecular hydrogel material with thixotropic behavior and spinnable characteristics, which has potential importance in healthcare and medical applications.
Article
Engineering, Chemical
Julien Muller, Xianyu Ding, Amine Geneste, Jerzy Zajac, Benedicte Prelot, Sophie Monge
Summary: This study focuses on the chemical modification of poly(vinyl alcohol) (PVA) with ethylene diamine tetraacetic acid (EDTA) groups to obtain new water-soluble polymers, named PVA(EDTA). The modified polymers showed enhanced sorption properties for heavy metal ions and good selectivity. The results demonstrated the potential of modifying basic commercial polymers with chelating agents for further applications in Polymer Enhanced Ultrafiltration (PEUF) processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Hakimeh Ziyadi, Mitra Baghali, Mina Bagherianfar, Fatemeh Mehrali, Reza Faridi-Majidi
Summary: This study investigated parameters affecting the electrospinning of PVA/kefiran composite nanofibers. The optimal condition for nanofiber fabrication was found to be 18 kV, 200 mm, and 1 mL/h, producing uniform nanofibers without knots or adhesion. Concentration was identified as the most effective parameter influencing the diameter of nanofibers, and phase separation did not occur between the two polymers according to TEM images.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Haiyan Du, Shaoze Liu, Feng You, Jinfeng Wang, Zhe Ren, Zemin Wu
Summary: The study successfully fabricated a flexible free-standing polyaniline/poly(vinyl alcohol) composite electrode with excellent capacitance performance and shape memory behavior, demonstrating good specific capacitance and remarkable flexibility, suitable for applications in flexible energy storage devices and high stretchable electronic devices.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2021)
Article
Polymer Science
Seong Baek Yang, Mohammad Rezaul Karim, Jungeon Lee, Jeong Hyun Yeum, Sabina Yeasmin
Summary: Novel poly(vinyl alcohol)/poly(vinyl butyral-vinyl alcohol) films with improved hydrophobicity were prepared by saponification of poly(vinyl acetate)/poly(vinyl butyral) blend films. The saponification process was confirmed by various analysis techniques. The hydrophobicity of the films increased with increasing poly(vinyl butyral) content. The saponified films exhibited improved mechanical properties and unique surface characteristics. These films have potential applications in biomaterials, filters, and medical devices.
Article
Engineering, Chemical
Chia-Yu Lai, Yi-Ming Sun, Ying-Ling Liu
Summary: This study aimed to improve the performance of poly (vinyl alcohol) (PVA) membranes by adding water-soluble ozonated lignin (Ws-OL) as an additive to increase the water permeation flux. The modified PVA membranes showed enhanced surface hydrophilicity, reduced crystallinity, and smaller crystallite sizes compared to the neat PVA membrane. Under the optimized condition, the PVA membranes modified with 50% Ws-OL and cross-linked with 4-sulfophthalic acid (SPTA) exhibited a water permeation flux of 78,630 g m-2 h-1 and a salt rejection of 99.91% in a 3.5% NaCl(aq) solution at 25 degrees C.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Polymer Science
Yang Feng, Shao-Cong Dai, Khoon Lim, Yogambha Ramaswamy, Ahmad Jabbarzadeh
Summary: Polymeric PVA-based composite hydrogels were fabricated with gellan gum (GG) and their rheological and tribological properties were investigated. Increasing the concentration of GG enhanced the storage modulus of the hydrogels, making them suitable for cartilage regeneration applications. Furthermore, the addition of GG reduced the friction coefficient, increasing the chance of survival under mechanical shear stresses.
Article
Engineering, Chemical
Martin Petkovsek, Andrej Krzan, Alenka Smid, Ema Zagar, Mojca Zupanc
Summary: Water-soluble poly(vinyl alcohol) (PVOH) poses an environmental threat as it is often washed down the drain unnoticed and unobstructed. This study focuses on the laboratory-scale degradation of PVOH using acoustic and hydrodynamic cavitation with or without an oxidative agent. The results show that mechanical degradation is the main mechanism in acoustic cavitation, while chemical effects also play a significant role in hydrodynamic cavitation.
Article
Polymer Science
Qi Kang, Hiroaki Takehara, Takanori Ichiki
Summary: In this study, the electrical conductivity of PANI/PVAc/HCSA composite films was investigated. It was found that the presence of PVAc led to an increase in conductivity when the HCSA/PANI weight ratio was lower than 1.50. The hydrogen bonding interactions between PANI and PVAc were found to improve the conductivity of the composite films.
Article
Biochemistry & Molecular Biology
Jianzhen Wu, Xiuzhicheng Wu, Fujian Yang, Xiaonan Liu, Fanjun Meng, Qinglin Ma, Yuju Che
Summary: Building multiple chemical crosslinks is an effective strategy to improve the mechanical properties and diversify the final application of polysaccharide nanoparticles reinforced poly(vinyl alcohol) physical hydrogels.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(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.
