Non-solvent induced phase separation as a method for making high-performance chemiresistors based on conductive polymer nanocomposites

Danesh, Ehsan; Ghaffarian, Seyed Reza; Molla-Abbasi, Payam

doi:10.1016/j.snb.2011.01.008

Cited by 28 publications

(17 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During recent decades, phase separation has become a precious tool in material science, especially biological and macromolecular‐related applications 1,2 . As one of the effective types, nonsolvent‐induced phase separation (NIPS) has been widely used in the fabrication of porous polymeric systems for sensors, 3 membranes, 4 coatings, 5 and so on. More specifically, the NIPS method has been extensively employed for the fabrication of superhydrophobic films and coatings 6‐8 .…”

Section: Introductionmentioning

confidence: 99%

Effect of nano‐size nodular structure induced by CNT‐promoted phase separation on the fabrication of superhydrophobic polyvinyl chloride films

Molla-Abbasi

2020

Polymers for Advanced Techs

View full text Add to dashboard Cite

The nonsolvent‐induced phase separation (NIPS) method was employed to fabricate the porous films based on polyvinyl chloride loaded with carbon nanotubes (CNTs). The combinational addition of CNTs and a proper nonsolvent (ethanol) resulted in a porous surface layer with the nano‐size nodular structure possessing an exact superhydrophobic behavior (water contact angle [WCA] = 157° and sliding angle [SA] <5°). The size of PVC nodules at the surface layer varies in the range of 200 to 800 nm depending on the nonsolvent concentrations, and polymer molecular weight. The effects of various nonsolvent concentrations as well as PVC molecular weight on the surface properties of the films were also investigated. Morphological and roughness analyses revealed the pronounced role of PVC molecular weight on the size of nodules, and the structural uniformity of the surface morphology based on the thermodynamic parameters such as relaxation time and dynamic of polymer chains. The concurrent use of CNTs and nonsolvent led to promote the NIPS process due to the nucleating role of CNTs, which were localized within the polymer‐rich phase leading to an ultra‐fine and packed nodular surface structure. Transmission electron microscopy results also proved the very well dispersion quality of CNTs. Glass transition temperature of PVC was also assessed, and the results were correlated to the associating ability of CNTs with polymer chains during the phase separation process. Overall, the promising potential of CNT/ethanol combination on the surface porosity and hydrophobicity of PVC nanocomposite films was revealed in this study, which could further extend its application window.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of nano‐size nodular structure induced by CNT‐promoted phase separation on the fabrication of superhydrophobic polyvinyl chloride films

Molla-Abbasi

2020

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…An automatic vapor generation system (AVGS) was used as the sensing apparatus . This system consists of nitrogen flow, solvent flask (a 100 ml, round‐bottomed glass flask), mass flow controllers (MFCs), and a three‐way solenoid valve, controlled with a computer.…”

Section: Methodsmentioning

confidence: 99%

“…Conductive polymer composites (CPCs) are one of the most interesting sensitive layers for detection of a wide range of stimuli. This is because of the relatively simple and inexpensive fabrication methods, such as spray layer by layer , casting , spin‐coating , etc. and the ease of interfacing them to processing electronics.…”

Section: Introductionmentioning

confidence: 99%

Wrapping carbon nanotubes by biopolymer chains: Role of nanointerfaces in detection of vapors in conductive polymer composite transducers

2015

Self Cite

View full text Add to dashboard Cite

Chitosan (CS) and hydrophobic-modified chitosan (HM-CS) chains were wrapped onto multiwalled carbon nanotubes (MWNTs) and introduced to polyvinyl alcohol (PVA) matrices as nanohybrid conductive polymer composites (CPCs) for detection of polar vapors. The effect of grafted alkyl groups on polarity of CS chains were studied by quantum mechanics (QM). The designed composites were applied as sensitive layers to clarify the response mechanism in CPCs gas sensors. It was realized that the wrapped biopolymers intensely influenced the sensitivity of the composites. Experiment results specified that the nature of biomacromolecules and their interactions with vapor molecules affects the resistance change in CPCs. The higher interaction of CS with polar vapor molecules caused more plasticization of polymer segments in the MWNTs connections. Such phenomenon enhanced the resistance change in the presence of analytes. Moreover, it was inferred that the semiconductor character of MWNTs has an important effect in the final signals. The more polar structure of CS in comparison with HM-CS enhanced the adsorption of vapor molecules on the surface of MWNTs, and the electron donor analytes decreased the conductivity of p-type MWNTs increasing the final responses. The presented results corroborate that the performance of CPCs gas sensors could be finely tuned through manipulation of the nanointerfaces. POLYM. COMPOS., 00:000-000, 2015.

show abstract

“…Thin polymer‐carbon composite films are a particularly promising group of materials for use as sensors e.g., chemiresistors. Factors that influence their effectiveness include low and uniform thickness, as well as repeatable and controllable chemical composition . Conventional solvent‐based techniques for the preparation of polymer films, such as spin coating, drop/dip coating, and spray coating necessitate the use of a high evaporation‐rate solvent for the deposited material, which limits the use of certain polymeric materials, and for these methods ensuring good adhesion to the substrate often becomes an issue …”

Section: Introductionmentioning

confidence: 99%

“…Factors that influence their effectiveness include low and uniform thickness, as well as repeatable and controllable chemical composition. [1][2][3][4] Conventional solvent-based techniques for the preparation of polymer films, such as spin coating, drop/dip coating, and spray coating necessitate the use of a high evaporation-rate solvent for the deposited material, which limits the use of certain polymeric materials, and for these methods ensuring good adhesion to the substrate often becomes an issue. [2,5] As a result, physical methods, such as vacuum evaporation, RF sputtering, plasma evaporation, ion beam sputtering, and pulsed laser deposition are of great interest, as they enable very thin layers (even below 100 nm) to be deposited with a good accuracy.…”

mentioning

confidence: 99%

Poly(propylene)/carbon composite thin films obtained by pulsed electron‐beam deposition

Jędrzejewski

Piwowarczyk

Jędrzejewska

et al. 2018

Plasma Processes & Polymers

View full text Add to dashboard Cite

For the first time pulsed electron beam deposition (PED) was used to deposit thin films composed of polymer‐carbon composite material. The targets were polypropylene‐carbon (PP/C) composites, with different carbon fillers: carbon black, nanotubes, or graphene. It was confirmed that coatings with composite structure were obtained – the PED method enables complex structures, including nanotubes, to be ablated whole from the target, transported toward substrate, and incorporated into the polymer matrix. These breakthrough results can contribute significantly to improved understanding of the mechanism of electron beam ablation of polymer and composite materials, and open up new possibilities for the deposition of complex composite thin films for use in, for example, advanced sensor applications.

show abstract

Non-solvent induced phase separation as a method for making high-performance chemiresistors based on conductive polymer nanocomposites

Cited by 28 publications

References 17 publications

Effect of nano‐size nodular structure induced by CNT‐promoted phase separation on the fabrication of superhydrophobic polyvinyl chloride films

Effect of nano‐size nodular structure induced by CNT‐promoted phase separation on the fabrication of superhydrophobic polyvinyl chloride films

Wrapping carbon nanotubes by biopolymer chains: Role of nanointerfaces in detection of vapors in conductive polymer composite transducers

Poly(propylene)/carbon composite thin films obtained by pulsed electron‐beam deposition

Contact Info

Product

Resources

About