Article
Polymer Science
Amjad Albiladi, Lassaad Gzara, Hussam Organji, Nazeeha S. Alkayal, Alberto Figoli
Summary: The major challenge in membrane distillation (MD) is membrane wetting caused by pollutants. This study focused on fabricating hydrophobic membranes for brine treatment using electrospun PVDF-HFP nanofiber membranes. The effects of solvent composition and polymer concentration on the electrospinning process were investigated, and post-treatment was carried out to optimize membrane performance.
Article
Engineering, Electrical & Electronic
Ponnan Sathiyanathan, Lixin Wu, Thomas Walter Schmidt, Tianyuan Li, Gunasekaran Harini Bhuvaneswari, Hongdoo Kim, Arun Anand Prabu, Kap Jin Kim
Summary: This study investigated the changes in beta-crystalline phase in nanofibers using varying content of sulfonated Poly(phenylidene sulfide) as a filler. Among the different samples, the 5 wt.-% sulfonated Poly(phenylidene sulfide) content exhibited the maximum increase in beta-crystallinity, showing a nucleating effect in the nanofibers.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Chemical
Yewen Xiao, Feng Xiao, Wei Ji, Li Xia, Linlin Li, Minmin Chen, Hualin Wang
Summary: Janus membranes with unique asymmetric wettability have been developed for oil-water separation. The membrane exhibits superhydrophilicity and superhydrophobicity on opposite sides, which contribute to excellent separation efficiency. The separation mechanism is based on the asymmetric wettability. The membrane shows potential for the separation of oil/water mixtures and surfactant-stabilized emulsions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Applied
Yalong Liu, Fangyuan Kong, Binjie Xin, Zhuoming Chen, Yingqi Xu, Yan Liu, Lifeng Li, Md All Amin Newton
Summary: A poly(vinylidene fluoride)/graphite composite material was developed for efficient oil-water separation. The material showed superhydrophobicity and superoleophilicity, with a separation efficiency exceeding 99.9% for carbon tetrachloride-in-water emulsions. Even after 25 cycles, it maintained a high separation efficiency for immiscible oil-in-water mixtures and water-in-oil emulsions. This material has great potential for various oil-water separation applications.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Polymer Science
Ruru Wan, Xiaoli Sun, Zhongjie Ren, Haijun Wang, Huihui Li, Shouke Yan
Summary: Poly(vinylidene fluoride) (PVDF) films with polymorphic crystal structure were prepared and the effects of heat treatment on the crystal morphology and properties were studied. The results provide a useful way to induce the formation of polar PVDF phases.
Article
Polymer Science
Hanako Asai, Yuya Terada, Koji Nakane
Summary: This study investigated the effect of adding protic organic solvents to a spinning solution of PVDF for electrospinning and compared the sample formation process with film samples prepared by different methods. The results showed that the addition of organic solvents can enhance the formation of electroactive crystals in PVDF, and the mechanism was clarified through FT-IR spectra.
Article
Nanoscience & Nanotechnology
Mohammad A. Barique, Yoichiro Neo, Masaji Noyori, Lia Aprila, Masaya Asai, Hidenori Mimura
Summary: Highly-aligned and molecularly oriented P(VDF/TrFE) nanofiber webs were fabricated in this study, and a significant enhancement of the piezoelectric response was observed through systematic post-treatments. The output voltage and surface electric charge density of the nanofibers were greatly increased, indicating the potential for their use in wearable piezoelectric energy harvesters and flexible self-powered portable devices.
Article
Engineering, Environmental
Hai-Ming Song, Li-Jing Zhu, Gang Wang, Hao Yang, Zhi-Xiang Zeng, Ling-Hui Wang
Summary: PVDF porous membranes prepared by non-solvent induced phase separation exhibit various crystalline forms and micro/nanostructures, showing excellent oil permeation resistance and outstanding antifouling properties.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Polymer Science
Mohammad Mahdi Abolhasani, Sara Azimi, Masoud Mousavi, Saleem Anwar, Morteza Hassanpour Amiri, Kamyar Shirvanimoghaddam, Minoo Naebe, Jasper Michels, Kamal Asadi
Summary: Piezoelectric polymers are promising materials for pressure sensing devices, especially in wearable applications, due to their flexibility compared to inorganic materials. Efforts have been made to improve their weak piezoelectric voltage coefficient, including creating composites with PVDF and graphene, and producing porous nanofibers with different porosities. By solidifying composite fibers in specific regions of a phase diagram, it was shown that graphene loading can significantly enhance the piezoelectric output, making the sensors biocompatible and highly sensitive to body motion.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhuizhui Fan, Mingwei Hu, Keru Hou, Kaili Jin, Hong Zhao, Zaisheng Cai
Summary: In this study, a hydrophobic PVDF membrane was fabricated using an ethanol/water/glycerol ternary coagulation bath system, leading to significant changes in the micromorphology and performance of the membrane. Introducing glycerol into the coagulation bath finely regulated the precipitation process, inhibiting solid-liquid separation and promoting liquid-liquid separation. The resulting membrane exhibited improved mechanical properties, a more uniform pore size, and a symmetrical interconnected fibrous and spherulitic structure.
Article
Chemistry, Physical
Seyed Mohsen Seraji, Xing Jin, Zhifeng Yi, Chunfang Feng, Nisa V. Salim
Summary: This study demonstrates the crystalline transformation of PVDF influences aerogel formation and compressible sensing properties of a graphene composite. The fabricated PVDF/graphene foams and aerogels show high sensitivity and improved compressive strength. The results provide new pathways for fabricating porous composites with lighter density and high mechanical and electrical properties.
Article
Engineering, Environmental
Xiao-lei Liao, De-xiang Sun, Sheng Cao, Nan Zhang, Ting Huang, Yan-zhou Lei, Yong Wang
Summary: The study demonstrates the high oil/water separation ability and super-hydrophilicity of PVDF porous fibrous membranes, showing potential for application in wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Gurneet Kaur, Jagan Singh Meena, Manjeet Jassal, Ashwini K. Agrawal
Summary: This study proposes a simple and cost-effective method to enhance the piezoelectric effect of PVDF by mixing a small amount of PU in PVDF-PU nanofibers. This method improves the stretchability and mechanical stability of PVDF-based piezoelectric nanogenerators, making them more suitable for harvesting energy from human articular motions. By integrating stretchable electrodes with the S-PENG device, the designed nanogenerator demonstrates excellent electrical and mechanical stability.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Li-Jing Zhu, Ming Yang, Gang Wang, Zhi-Xiang Zeng, Zheng-Feng Jia
Summary: Superoleophobic and anti-oil adhesion membranes were prepared using vapor-induced phase separation and sulfonated dopamine deposition. The resulting membranes showed excellent performance in removing emulsified toluene from water.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Tong Li, Minghe Qu, Corey Carlos, Long Gu, Fei Jin, Tao Yuan, Xiaowei Wu, Jijun Xiao, Ting Wang, Wei Dong, Xudong Wang, Zhang-Qi Feng
Summary: The research introduces a new strategy for fabricating soft piezoelectric nanomaterials with excellent performance and stability. A highly sensitive all-fiber-based soft sensor has been successfully developed and demonstrated high accuracy and sensitivity for physiological mechanical stimulation in in vivo experiments.
ADVANCED MATERIALS
(2021)
Article
Polymer Science
Mohammad Mahdi Abolhasani, Amin Jalaei, Reza Tavana, Fahimeh Kashani
Article
Materials Science, Textiles
Elham Eftekhari, Hossein Hasani, Hossein Fashandi
Summary: The batch-adsorption technique evaluated the adsorption capacity of nonwovens made from lignocellulosic milkweed fibers for removing heavy metal ions, particularly Pb2+ and Ni2+, from aqueous solutions. The results showed that the equilibrium concentration of heavy metal ions varied with solution pH, with the lowest concentration observed at pH = 6. The removal percentage of Ni2+ ions reached 65.58% at 60 minutes, while Pb2+ ions had a removal percentage of 96.16% at 90 minutes. Operating temperature had a slight impact on the removal percentages of both ions. Freundlich and Langmuir isotherm models were followed by milkweed fibers for Pb2+ and Ni2+ ions, respectively, with the pseudo-second order model best describing the adsorption kinetics.
JOURNAL OF INDUSTRIAL TEXTILES
(2021)
Article
Construction & Building Technology
Rouhollah Rostami, Mohammad Zarrebini, Khaled Sanginabadi, Davood Mostofinejad, Sayyed Mahdi Abtahi, Hossein Fashandi
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Pharmacology & Pharmacy
Mohsen Ashjari, Farnoosh Panahandeh, Zahra Niazi, Mohammad Mahdi Abolhasani
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Mohammad Mahdi Abolhasani, Minoo Naebe, Morteza Hassanpour Amiri, Kamyar Shirvanimoghaddam, Saleem Anwar, Jasper J. Michels, Kamal Asadi
Article
Chemistry, Multidisciplinary
Hosna Soleymani, Mohammad Noormohammadi, Mohammad Almasi Kashi, Morteza Hassanpour Amiri, Jasper J. Michels, Kamal Asadi, Mohammad Mahdi Abolhasani
Summary: Piezoelectric PVDF nanowires are highly sensitive to small vibrations, making them ideal for energy harvesting. A new method combining template-wetting and anisotropic solvent-nonsolvent phase inversion has been developed to produce PVDF nanowires with significantly enhanced power output. Numerical simulations show that the sausage-like nano-generators increase power density by 280%, with finite element modeling explaining the enhancement in piezoelectric performance due to the higher deformability of these structures.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Polymer Science
Rouhollah Ahmadi, Hossein Fashandi, Vajihe Akbari
Summary: The study produced antibacterial low-melting-point PET fibers through modification and characterized the fibers. It was found that increasing AAm concentration enhances the rechargeable antibacterial properties of the fibers while maintaining their structural properties.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2021)
Article
Materials Science, Composites
Reyhaneh Laghaei, Hossein Fashandi, Seyyed Mahdi Hejazi, Samira Shaghaghi, Alireza Shamaei-Kashani
Summary: Using cellulose nanocrystals (CNCs) to reinforce epoxy-based composites can significantly enhance mechanical properties, particularly tensile strength, fracture toughness, and impact strength. It was found that using hardener as the mixing medium resulted in superior results during manufacturing process.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Chemistry, Physical
Pedram Mohammadi Esfarjani, Hossein Fashandi, Mehdi Karevan, Ahmad Moheb
Summary: Water scarcity is a global issue, and water desalination has been proposed as a viable solution. In this study, PVC membranes were fabricated using a distillation technique for water desalination. Various parameters in the membrane production process were adjusted to optimize the PVC membrane morphology for vacuum membrane distillation (VMD), showing a significant influence on membrane performance. By altering the PVC concentration in the casting solution, membranes with suitable macrovoids and cellular pores can be produced, balancing membrane flux and liquid entry pressure for optimal VMD performance. Additionally, the study found that operational parameters during VMD can affect membrane flux positively without impacting salt rejection, highlighting the importance of PVC concentration in membrane production.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Textiles
Reyhaneh Laghaei, Seyyed Mahdi Hejazi, Hossein Fashandi, Saleh Akbarzadeh, Samira Shaghaghi, Alireza Shamaei-Kashani
Summary: Incorporation of hollow fibers in polymer base composites has attracted great interest due to their flexibility and lightweight structure. This study aimed to investigate the fracture toughness and impact resistance of E-glass/epoxy composites hybridized with a layer of polyethylene terephthalate hollow fibers. The results showed that PETHF-STs weakened the mechanical performance, while PETHF-FIs enhanced the fracture toughness and impact resistance.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Engineering, Biomedical
Parisa Amiri, Zahra Talebi, Dariush Semnani, Rouhollah Bagheri, Hossein Fashandi
Summary: Surface-modified nanofibers in dental composites can significantly enhance mechanical properties and color by forming semi-interpenetration network between nanofibers and resin matrix and achieving uniform distribution of nanofibers in the resin. However, increasing nanofiber content may lead to a decrease in mechanical properties of the composite materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2021)
Article
Construction & Building Technology
Mahnaz Hajimohammadi, Parham Soltani, Dariush Semnani, Ebrahim Taban, Hossein Fashandi
Summary: This study investigates the acoustic performance of fibrous sound absorbers incorporating nanofibrous structures. The results show that electrospinning nanofibrous structures on the back side of the nonwoven fabric enhances viscosity resistance absorption, while electrospinning on the front side changes the absorption mechanism to resonance type. Hollow nanofibers demonstrated superior acoustic behavior compared to core-shell structures. The increase of membrane thickness improved the acoustic performance at low and middle frequencies.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Environmental
Nazanin Mokhtari, Mohammad Dinari, Hossein Fashandi
Summary: The shortage of water resources and the increased demand for clean water have led to focused investigations on wastewater treatment. Mixed matrix membranes (MMMs) have been introduced as economic and efficient tools for removing contaminants from wastewater. This study synthesized a hydrazone-linked covalent organic framework (Hz-TFPTZ-COF) and incorporated it into a polysulfone (PSf)/poly N-vinylpyrrolidone (PVP) matrix to obtain MMMs with different concentrations of Hz-TFPTZ-COF. The results showed that even at a low concentration of 1.0 wt%, the MMMs exhibited superior performance in terms of pure water permeability and dye rejection.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Mehdi Pourbafrani, Sara Azimi, Narges Yaghoobi Nia, Mahmoud Zendehdel, Mohammad Mahdi Abolhasani
Summary: Polyvinylidene fluoride and its copolymers have potential applications in energy harvesting and environmental sensing. Increasing the concentration and feed rate of the polymer solution can result in larger nanofiber diameter and decrease in the output voltage of the nanofibers.
Article
Materials Science, Multidisciplinary
Mehrdad Asadolahi, Hossein Fashandi
Summary: Membrane distillation is an effective solution to global water scarcity. However, membrane wetting threatens the long-term performance and feasibility of this technique. In this study, an omniphobic membrane was developed using a single-step nanoparticle-free technique, which showed excellent resistance against membrane wetting in membrane distillation experiments.
ACS APPLIED POLYMER MATERIALS
(2023)