Unique Necklace‐Like Phenol Formaldehyde Resin Nanofibers: Scalable Templating Synthesis, Casting Films, and Their Superhydrophobic Property

Wang, Xing; Zhang, Mingqian; Kou, Ran; Lu, Lei‐Lei; Zhao, Yang; Xu, Xue-Wei; Liu, Guangming; Zheng, Yongmei; Yu, Shu‐Hong

doi:10.1002/adfm.201600907

Cited by 27 publications

(20 citation statements)

References 37 publications

(43 reference statements)

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“…The various elements produced by these multicomponent conjugants spinning methods are finally dissociated after a subsequent operation (dissolution or splitting process) to obtain nanofibers. A fourth group is dedicated to the methods using an electric field for the development of nanofibers [ 55 ]. They can be described as electrospinning methods.…”

Section: Production Of Nanofibersmentioning

confidence: 99%

“…Nanospider™ needle-free technology presented by Elmarco Company is a good example for this purpose. In addition to all these methods, there are some others such as drawing, template synthesis, self-assembly, phase separation, and flash spinning [ 55 , 56 , 57 , 58 , 59 ], but most of them are only limited to the laboratory scale.…”

Section: Production Of Nanofibersmentioning

confidence: 99%

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Electrospun PVDF Nanofibers for Piezoelectric Applications: A Review of the Influence of Electrospinning Parameters on the β Phase and Crystallinity Enhancement

et al. 2021

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Polyvinylidene fluoride (PVDF) is among the most attractive piezo-polymers due to its excellent piezoelectricity, lightweight, flexibility, high thermal stability, and chemical resistance. PVDF can exist under different forms of films, membranes, and (nano)fibers, and its piezoelectric property related to its β phase content makes it interesting for energy harvesters and wearable applications. Research investigation shows that PVDF in the form of nanofibers prepared by electrospinning has more flexibility and better air permeability, which make them more suitable for these types of applications. Electrospinning is an efficient technique that produces PVDF nanofibers with a high β phase fraction and crystallinity by aligning molecular dipoles (–CH2 and –CF2) along an applied voltage direction. Different nanofibers production techniques and more precisely the electrospinning method for producing PVDF nanofibers with optimal electrospinning parameters are the key focuses of this paper. This review article highlights recent studies to summarize the influence of electrospinning parameters such as process (voltage, distance, flow rate, and collector), solution (Mw, concentration, and solvent), and ambient (humidity and temperature) parameters to enhance the piezoelectric properties of PVDF nanofibers. In addition, recent development regarding the effect of adding nanoparticles in the structure of nanofibers on the improvement of the β phase is reviewed. Finally, different methods of measuring piezoelectric properties of PVDF nanofibrous membrane are discussed.

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Section: Production Of Nanofibersmentioning

confidence: 99%

Section: Production Of Nanofibersmentioning

confidence: 99%

Electrospun PVDF Nanofibers for Piezoelectric Applications: A Review of the Influence of Electrospinning Parameters on the β Phase and Crystallinity Enhancement

et al. 2021

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“…In colloidal synthesis, polymers uniformly cladding on nanowires can liquefy and further thermodynamically evolve into periodical shells as driven by the polymer− nanowire−solution three-phase interfacial energy. Such liquefaction and evolution behaviors of polymer shells on 1D nanowires due to Plateau-Rayleigh instability are general and have given rise to an array of periodically shelled nanowires 31,32 (Figure 3c-ii). Intriguingly, we found that this chemical transformation principle is applicable to inorganic superionic conductors.…”

Section: Regiospecific One-off Transformationmentioning

confidence: 99%

Axially Segmented Semiconductor Heteronanowires

Zhuang

Zhang

et al. 2020

Acc. Mater. Res.

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Conspectus Programming nanoscale functional objects into complex, sophisticated heterostructures that tremendously outperform their solo objects and even bring about exotic chemical/physical properties offers exciting routes toward a spectrum of applications in photonics and electronics. The development in synthetic chemistry over past decades has enabled a library of hybrid nanostructures, such as core–shell, patchy, dimer, hierarchical/branched ones, etc. Nevertheless, the material combinations of these non-van der Waals solids are largely limited by the rule of lattice-matched epitaxy thereof. As an emerging class of heterostructures, axially segmented nanowires (ASNWs) offer an alternative but effective approach to epitaxially integrating the conventional non-van der Waals solids. The large lattice-mismatch tolerance in ASNWs permits vast material combinations, broad size modulations, and flexible interfacial strain engineering, signifying the great potentials for engineering their photon utilizations, band structures, features of charge carriers or excitons, and some other emerging properties. Unfortunately, ASNWs with on-demand, high-precision control over composition, shape, dimension, crystal phase, interface, and periodicity remain so far synthetically challenging. By steering the chemoselective reactions, one has access to high-precision ASNWs. In this Account, we describe the state-of-the-art synthetic strategies for chemoselectivity control. We categorize them into (i) unidirectional/bidirectional sequential additions, which include selective area epitaxy, catalyzed growth, and end-facet-seeded growth, and (ii) regiospecific one-off transformations, which include ionic exchange reaction, strain/thermal induced phase segregation and transition, Plateau-Rayleigh instability, regioselective heterogeneous nucleation as ruled by lattice match, defect, and surface charges, and nanomasking. We uncover the chemical principles behind from thermodynamic and kinetic aspects. Then we further offer insights into their fundamental physics (including carrier/photon/phonon confinement, mixed dimensionality, quantum dot–nanowire interaction, and interdot coupling effect) that are strongly correlated with a spectrum of applications, highlighting how the precise control of compositions and structures ultimately dictates their properties and functions. In the end, we conclude by describing current challenges and future directions of this field in terms of material synthesis, growth mechanism, exotic physics, and performance optimization. By crafting ASNWs at atomic precision, high-performance ASNWs with sophisticated electronic and phonon structures can be envisioned ultimately for applications in diverse fields, spanning from solar energy conversion and thermoelectrics to optoelectronics and quantum communications.

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“…Moreover, when the glucose was replaced by other carbon sources, many other kinds of carbonaceous shells could be coated on the surfaces of Te NWs. For example, necklace‐like Te@PFR (PFR is the acronym for phenol‐formaldehyde resin) nanocables (Figure (6)) were prepared via a facile and scalable template‐directed hydrothermal process, and Te@N‐doped‐C nanocables (Figure (7)) with a diameter ranging from 40 to 540 nm were successfully obtained by the hydrothermal carbonization of glucosamine hydrochloride (C 6 H 13 NO 5 ·HCl) . Through a similar hydrothermal carbonization process, Te@Fe/N‐codoped‐C with a diameter of 150 nm could be prepared by changing the reaction precursor to ferrous gluconate and the cost‐effective biomass‐derived glucosamine hydrochloride (Figure (8)) …”

Section: G Te Nws and The Derived 1d Nanostructuresmentioning

confidence: 99%

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

Yang

Liang

et al. 2019

Advanced Materials

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1D nanomaterials with high aspect ratio, i.e., nanowires and nanotubes, have inspired considerable research interest thanks to the fact that exotic physical and chemical properties emerge as their diameters approach or fall into certain length scales, such as the wavelength of light, the mean free path of phonons, the exciton Bohr radius, the critical size of magnetic domains, and the exciton diffusion length. On the basis of their components, aspect ratio, and properties, there may be imperceptible connections among hundreds of nanowires prepared by different strategies. Inspired by the heredity system in life, a new concept termed the “nanowire genome” is introduced here to clarify the relationships between hundreds of nanowires reported previously. As such, this approach will not only improve the tools incorporating the prior nanowires but also help to precisely synthesize new nanowires and even assist in the prediction on the properties of nanowires. Although the road from start‐ups to maturity is long and fraught with challenges, the genetical syntheses of more than 200 kinds of nanostructures stemming from three mother nanowires (Te, Ag, and Cu) are summarized here to demonstrate the nanowire genome as a versatile toolbox. A summary and outlook on future challenges in this field are also presented.

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Unique Necklace‐Like Phenol Formaldehyde Resin Nanofibers: Scalable Templating Synthesis, Casting Films, and Their Superhydrophobic Property

Cited by 27 publications

References 37 publications

Electrospun PVDF Nanofibers for Piezoelectric Applications: A Review of the Influence of Electrospinning Parameters on the β Phase and Crystallinity Enhancement

Electrospun PVDF Nanofibers for Piezoelectric Applications: A Review of the Influence of Electrospinning Parameters on the β Phase and Crystallinity Enhancement

Axially Segmented Semiconductor Heteronanowires

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

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