Preparation of aligned Fe3O4@Ag-nanowire/poly(vinyl alcohol) nanocomposite films via a low magnetic field

Li, Na; Huang, Guan‐Jhong; Xiao, Hong‐Mei; Fu, Shao‐Yun

doi:10.1016/j.compositesa.2015.06.019

Cited by 23 publications

(12 citation statements)

References 48 publications

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“…Polyvinyl alcohol (PVA), a representative of this family, possesses many superiorities, such as excellent mechanical and barrier properties, favorable biocompatibility, and great thermal stability. − PVA foams are usually produced by the solution method, because of their water solubility. − Nevertheless, the method is time-consuming and cumbersome; thus, many efforts have been devoted to the simple and efficient thermoplastic process. , Unfortunately, as a consequence of the high density of intramolecular and intermolecular hydrogen bonds (H-bonds) among the polymer chains, PVA has a narrow thermoplastic processing window, making it difficult to be processed with the thermoplastic method . Usually, the addition of plasticizers is a feasible solution to obtain a broad thermoplastic processing window. , In our earlier study, a PVA sheet was obtained through thermoplastic processing with the aid of polyol, and then, PVA foam was obtained through a subsequent scCO 2 batch foaming process .…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Strategy to Improve the Processiblity and Properties of Poly(vinyl alcohol) Foams Based on a 3D Hydrogen-Bond Network

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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Poly(vinyl alcohol) (PVA) foams are advantageous for their biocompatibility and high cost/performance ratio. However, their processibility and comprehensive properties are difficult to achieve. Herein, we report an eco-friendly strategy for preparing PVA foams with improved mechanical properties and thermal stability by constructing a 3D hydrogen-bond (H-bond) network among PVA, lignosulfonic acid (LA), and water. The influences of foaming parameters and LA content on the foaming process and foam structures were investigated. Compared to PVA foam, PVA−LA foam showed improved cell morphology, higher glass transition temperature, and better compressive properties because of the strong H-bond interaction between PVA and LA. The H-bond interactions between LA and water also improved the thermal processing stability of the composite by depressing water evaporation during processing. Furthermore, the additives employed, LA, and water are eco-friendly. It is therefore believed that this work will provide a sustainable and facile strategy for fabricating PVA-based composite foam.

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Section: Introductionmentioning

confidence: 99%

Eco-Friendly Strategy to Improve the Processiblity and Properties of Poly(vinyl alcohol) Foams Based on a 3D Hydrogen-Bond Network

Zhang

et al. 2020

Ind. Eng. Chem. Res.

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“…5,22,77,81,82 Here, poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), a widely used transparent hole injection 30,58,83−85 and electrochromic layer material, 50,86−88 is deposited in aqueous dispersion on flexible poly(ethylene terephthalate) (PET) substrate, without additional wettability-enhancing dopants as required in previous studies with similar materials. 4,25,58,73,79,89−92 Polyvinyl alcohol (PVA), a nonhazardous dielectric barrier and mask material in other printed composite films, 43,93 is codeposited in aqueous solution as a support material defining the conductive stripe pattern. The resulting process control over pattern morphology and film thickness is investigated and compared to the conventional approach using slot die coating.…”

Section: Introductionmentioning

confidence: 99%

Scalable, Alternating Narrow Stripes of Polyvinyl Alcohol Support and Unmodified PEDOT:PSS with Maintained Conductivity Using a Single-Step Slot Die Coating Approach

Parsekian

Harris

2019

ACS Appl. Mater. Interfaces

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Slot die coating has been established as an economical approach for deposition of parallel narrow stripes, a constituent pattern feature in many printed device applications. However, the minimum feature size that can be achieved using this approach is constrained by wetting and liquid bridge phenomena at the deposition region. We hypothesize that pattern resolution and process control can be improved by co-depositing a support fluid to stabilize the pattern. Electrically conductive poly(3,4ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is slot die-coated in parallel stripes on flexible poly(ethylene terephthalate) substrate, without wettability-enhancing dopants or substrate pretreatment. A miscible liquid phase, polyvinyl alcohol, is used as the support material. Feature size performance and conductivity of PEDOT:PSS stripe regions are evaluated across a range of process conditions. Narrow PEDOT:PSS stripes produced using our technique range from 400 to 850 μm and exhibit conductivity approaching 1.5 S cm −1 . This electrical performance falls within the upper range expected prior to standard conductivity-enhancing post-treatments. Significantly, dewetting effects normally present with undoped PEDOT:PSS on the plastic substrate are fully mitigated with our deposition technique. These results indicate high ease of processing and good feature size performance, with few inherent drawbacks to the functional properties of the patterned films.

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“…Also, the large shear force upon brushing led to the deformation or breaking of the nanowires [20]. In the second type, either optical [22–24], electric [25–29] or magnetic [30–32] field force was used to control the orientation of nanowires. An optical tweezer could align nanowires into arbitrary patterns generated by computer aided design.…”

Section: Introductionmentioning

confidence: 99%

Patterned electromagnetic alignment of magnetic nanowires

Beheshti

Choi

Geng

et al. 2018

Microelectronic Engineering

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A combination of electromagnetic alignment and topological pattern assisted alignment to position magnetic nanowires, which is referred to as the Patterned Electromagnetic Alignment (PEA), is developed and examined. Electrodeposited, FeNiCo nanowires with different lengths were used as the test nanomaterial, and the microscale grooved surface was formed by UV nanoimprint lithography. The accuracy of the PEA with FeNiCo nanowires was evaluated by measuring the deviation angle from the direction of the magnetic field line for different magnetic field strengths and nanowire lengths, and a statistical alignment distribution was reported for different nanowire length groups. The results were compared with those of the electromagnetic alignment on flat surfaces and in grooved-patterned substrates without electromagnetic alignment. Overall, the deviation angle for the PEA was lower than that for the electromagnetic alignment when all other experimental conditions were identical, indicating that the alignment accuracy along the direction of the magnetic field lines was enhanced in the presence of surface micro grooves. This can be attributed to the fact that, upon attachment of nanowires to the substrate surface, the surface micro grooves in the PEA add additional deterministic characteristics to the otherwise stochastic nature of the nanowire deposition and solvent evaporation processes compared to the sole electromagnetic alignment.

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Preparation of aligned Fe3O4@Ag-nanowire/poly(vinyl alcohol) nanocomposite films via a low magnetic field

Cited by 23 publications

References 48 publications

Eco-Friendly Strategy to Improve the Processiblity and Properties of Poly(vinyl alcohol) Foams Based on a 3D Hydrogen-Bond Network

Eco-Friendly Strategy to Improve the Processiblity and Properties of Poly(vinyl alcohol) Foams Based on a 3D Hydrogen-Bond Network

Scalable, Alternating Narrow Stripes of Polyvinyl Alcohol Support and Unmodified PEDOT:PSS with Maintained Conductivity Using a Single-Step Slot Die Coating Approach

Patterned electromagnetic alignment of magnetic nanowires

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