The effect of MWNTs concentration and nanofiber orientation on mechanical properties of PAA nanocomposite nanofibrous web

Ebadi, Seyed Vahid; Fakhrali, Aref; Gharehaghaji, Ali Akbar; Mazinani, Saeedeh; Siadat, Seyed Omid Ranaei

doi:10.1002/pc.23512

Cited by 12 publications

(10 citation statements)

References 43 publications

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“…Furthermore, as the increasing of ANFs layers, the curves showed much steeper slope, indicating that the Young's modulus of these ANFs/PET composite membranes was greatly increased due to that the ANFs bonded the PET fibers and prevented themselves from slipping. The results were good agreement with the previous observations .…”

Section: Resultssupporting

confidence: 93%

Layer‐by‐layer self‐assembly of aramid nanofibers on nonwoven fabric for liquid filtration

Yuan

Liu

et al. 2016

Polymer Composites

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The composite ultrafiltration membranes were fabricated by self-assembling the aramid nanofibers (ANFs) on nonwoven fabric (NF) via layer-by-layer technique. Different numbers of ANFs layers (8, 10, 12) have been selfassembled on the NF. The surface morphology, surface wettability, tensile strength, and filtration performance of as-prepared composite membranes were investigated. The results demonstrated that the surface assembled NF with the deposition of ANFs could improve their hydrophilicity and mechanical properties. The filtration experiments indicated that the composite membranes could efficiently remove the nanoparticles from water system. When the number of ANFs layers reaches 12, 10 nm Au nanoparticles can be removed from the feed solution with a rejection rate above 90%. This work presents the feasibility of liquid filtration by using the ANFs selfassembled composite membranes, which exhibits a potential application in ultrafiltration. POLYM. COMPOS.,

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Section: Resultssupporting

confidence: 93%

Layer‐by‐layer self‐assembly of aramid nanofibers on nonwoven fabric for liquid filtration

Yuan

Liu

et al. 2016

Polymer Composites

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“…The beads in the nanofiber structure were removed and smooth nanofibers were formed by increasing the polymer concentration. 39 Similar results were obtained for polymer molecular weight. 40 The voltage and feeding rate also influence the diameter of electrospun nanofibers.…”

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confidence: 76%

Electrospun PGS/PCL nanofibers: From straight to sponge and spring‐like morphology

Fakhrali

Semnani

Salehi

et al. 2020

Polymers for Advanced Techs

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Poly(glycerol sebacate) (PGS) is an attractive polymer that has many applications in medical fields, especially in tissue engineering. In this study, the influence of solvent system on electrospinnability, forming of bead-free nanofibers and the morphology of PGS nanofibers was investigated and discussed. Among different solvents, the acidic solvent as a benign solvent was used for electrospinning. The steps were as follows: (a) Synthesis the PGS pre-polymer and analysis its chemical structure by Fourier-transform infrared spectroscopy (FTIR); (b) Electrospinning of the PGS by mixing PCL in eight different solvent systems; (c) evaluation the morphology of produced nanofibers using the scanning electron microscope (SEM); (d) the study of biocompatibility of produced nanofibers by MTT assay. The average diameter of nanofibers in different solvent systems turned out to vary from 260 ± 63 to 4588 ± 970 nm and nanofibers with different morphologies were produced by changing the solvent system. Among the produced straight nanofibers, the best samples were FA 30,15 (formic acid), FA/AC 30,15 (formic acid/Acetone), FA/AA 30,15 (formic acid/acetic acid), CF/DMF 20,15 (chloroform/N,N-dimethylformamide), FA/AA 35,15 , and CF/DMF 23,15 , respectively (based on size and morphology). Also, the produced nanofibers in CF/ET (chloroform/ethanol) had a rough surface. When AA was used as solvent and polymer concentration was kept 35% w/v, sponge-like scaffold was produced. Moreover, spring-like nanofibers were fabricated by using DMF, (at 30% w/v) and AC (in all polymer concentrations). MTT results also demonstrated that CF/DMF 20,15 as produced sample via hazardous solvents (class 3) is biocompatible. These scaffolds can be used in different tissue engineering applications according to their morphology.

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“…Polymer nanofibers are a class of fibers with diameter less than 1 μm. Because of extremely high specific surface area and highly porous structures provided by nanofibers, they have found use in many areas including sensors and biosensors, tissue engineering, drug delivery, filtration, energy storage, enzyme immobilization, composite reinforcement, protective clothing, sutures, and insulation . Nanofibers have been made using a variety of techniques, among which the electrospinning has generated enormous interest due to its simplicity, versatility, and continuous production capability .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of a novel polyurethane/polypyrrole‐p‐toluenesulfonate (PU/PPy‐pTS) electroactive nanofibrous bending actuator

Ebadi

Semnani

Fashandi

et al. 2019

Polymers for Advanced Techs

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Electroactive actuators based on conductive polymers currently have attracted a great deal of attention. In this study, a nanofibrous structure of polypyrrole (PPy) was used to fabricate an electroactive bending actuator. For this purpose, polyurethane/PPy (PU/PPy) nanofibrous bending actuator was fabricated through the combined use of electrospinning and in-situ chemical polymerization. The response surface methodology (RSM) was considered to find the optimal electrospinning conditions for producing PU nanofibers with the minimum diameter. The in-situ chemical polymerization method was then used to prepare a conductive layer of PPy on the surface of optimum electrospun nanofibers with p-toluenesulfonate (pTS) as the dopant. The coated nanofibers were used in the fabrication of PU/PPy-pTS nanofibrous bending actuator. The morphology and electrical, thermal, electrochemical, and electrochemomechanical properties of the fabricated actuator were investigated. By using optimum conditions of electrospinning, PU nanofibers were obtained with a diameter of 221 nm. The results showed that the produced PU/PPy-pTS nanofibers enjoy good thermal stability and have an electrical conductivity of about 276.34 S/cm. The obtained cyclic voltammetric and dynamo-voltammetric responses showed that the dominant mechanism of actuation in the fabricated PU/PPy-pTS nanofibrous actuator is the exchange of perchlorate anions with a partial exchange of lithium cations in 1M lithium perchlorate electrolyte solution. The fabricated actuator was capable of undergoing 141°r eversible angular displacement during a potential cycle. The results demonstrated that, given high porosity, large specific surface area, flexibility, and desirable electrical properties, PU/PPy nanofibrous electroactive actuator provides a lot of potential for developing artificial muscle applications.

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The effect of MWNTs concentration and nanofiber orientation on mechanical properties of PAA nanocomposite nanofibrous web

Cited by 12 publications

References 43 publications

Layer‐by‐layer self‐assembly of aramid nanofibers on nonwoven fabric for liquid filtration

Layer‐by‐layer self‐assembly of aramid nanofibers on nonwoven fabric for liquid filtration

Electrospun PGS/PCL nanofibers: From straight to sponge and spring‐like morphology

Synthesis and characterization of a novel polyurethane/polypyrrole‐p‐toluenesulfonate (PU/PPy‐pTS) electroactive nanofibrous bending actuator

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