A review on the progress of polymer nanostructures with modulated morphologies and properties, using nanoporous AAO templates

Mijangos, Carmen; Hernández, Rebeca; Martı́n, Jaime San

doi:10.1016/j.progpolymsci.2015.10.003

Cited by 159 publications

(126 citation statements)

References 280 publications

(460 reference statements)

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“…Recently, many research groups have devoted attention to exploration of the effects of AAO nanoconfinement, which alters physical, chemical, and mechanical properties, on molecular dynamics, molecular orientation, morphology transformation , and so forth. Especially, nanoconfinement effects on various geometries have been reported to influence the thermal glass transition of amorphous polymers .…”

Section: Resultsmentioning

confidence: 99%

“…For fabrication of polymer nanofibers using an AAO nanoporous template, effective results of molten polymer fluidity and polymer solution fluidity in nanochannels have been clarified, generally emphasizing polymer properties , AAO properties, and wetting parameters such as time, pressure, temperature, nanochannel pore size, and an interfacial surface between the molten polymer and nanochannel surface . The molten polymer and polymer solution flowing ability depends strongly on filtration methods . Confinement of AAO porous walls alters the polymer molecular orientation and dynamics of polymer chains , and affects the nanostructure crystallization , glass temperature , polymer tacticity , and electron transportation .…”

Section: Introductionmentioning

confidence: 99%

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One-dimensional polymer nanofiber arrays with high aspect ratio obtained by thermal nanoimprint method

et al. 2016

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Polymer surface modification that mimicks natural behaviors has been a subject of great interest. Fabrication of polymer nanofiber arrays with various applications has been studied intensively. Avoidance of chemical solvents, reduction of processing time, improvement of the nanofiber size distribution and aspect ratios, and improvement of reproducibility have been sought for industrial value creation. This study examines an alternative fabrication methods for polymer nanofiber arrays using a combination of anodic aluminum oxide (AAO) nanoporous template and thermal nanoimprinting lithography for simple, precise processing. Based on those results, nanofiber arrays were fabricated with 40‐µm‐thick film and 50–100 nm fiber diameter polystyrene (PS) and polypropylene (PP). For this study, 50‐nm diameter PS nanofibers with 50 µm maximum length and a maximum aspect ratio of 1,000 were produced in addition to PP nanofibers having 130 µm maximum length and an aspect ratio of 2,600. The nanofiber lengths were affected considerably by molten polymer flow related to imprint processing conditions, polymer properties, AAO properties, and surface wettability between AAO and molten polymers. Moreover, AAO nanoconfinement demonstrated molecular orientation alignment of polymers that affect thermal properties, crystallinity, and mechanical properties of the obtained polymer nanofiber arrays. POLYM. ENG. SCI., 57:214–223, 2017. © 2016 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-dimensional polymer nanofiber arrays with high aspect ratio obtained by thermal nanoimprint method

et al. 2016

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“…Electrospinning has been considered as one of the simplest and most effective physical methods to prepare nanoscale 1D structures (nanofibers and nanorods) without any template [73,74]. The basic set up of electrospinning system includes three major components: high-voltage power supply, spinneret and an electrical conductive collector, as shown in Fig.…”

Section: Electrospinning Approachmentioning

confidence: 99%

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

et al. 2018

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“…Anodization is a spontaneous process that oxidizes a material while creating cylindrical nanopores parallel to each other and perpendicular to their underlying metallic substrate . The layer anodized during the initial step is allowed to reach symmetry and then dissolved, leaving ordered concave pits in the substrate which serve as nucleation sites during the second anodization step .…”

Section: Anodizationmentioning

confidence: 99%

“…Nanosphere lithography can be considered a hybrid approach; however, it is based on a bottom‐up self‐assembly of nanospheres. Anodization will be presented next; although, not widely applied for the fabrication of ultrathin membranes, this very well researched process has been successfully used for the production of nanoporous patterns and thick membranes. Although commonly considered a top‐down approach, nanoimprint techniques that utilize low‐cost or unique master molds have been included in this review.…”

Section: Introductionmentioning

confidence: 99%

Fabrication techniques enabling ultrathin nanostructured membranes for separations

Mireles

Gaborski

2017

Electrophoresis

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The fabrication of nanostructured materials is an area of continuous improvement and innovative techniques that fulfill the demand of many fields of research and development. The continuously decreasing size of the smallest patternable feature has expanded the catalog of methods enabling the fabrication of nanostructured materials. Several of these nanofabrication techniques have sprouted from applications requiring nanoporous membranes such as molecular separations, cell culture, and plasmonics. This review summarizes methods that successfully produce through-pores in ultrathin films exhibiting an approximate pore size to thickness ratio of one, which has been shown to be beneficial due to high permeability and improved separation potential. The material reviewed includes large-area, parallel, and affordable approaches such as self-organizing polymers, nanosphere lithography, anodization, nanoimprint lithography as well as others such as solid phase crystallization and nanosphere lens lithography. The aim of this review is to provide a set of inexpensive fabrication techniques to produce nanostructured materials exhibiting pores ranging from 10 to 350 nm and exhibiting a pore size to thickness ratio close to one. The fabrication methods described in this work have reported the successful manufacture of nanoporous membranes exhibiting the ideal characteristics to improve selectivity and permeability when applied as separation media in ultrafiltration.

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A review on the progress of polymer nanostructures with modulated morphologies and properties, using nanoporous AAO templates

Abstract: ABSTRACT

Cited by 159 publications

References 280 publications

One-dimensional polymer nanofiber arrays with high aspect ratio obtained by thermal nanoimprint method

One-dimensional polymer nanofiber arrays with high aspect ratio obtained by thermal nanoimprint method

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

Fabrication techniques enabling ultrathin nanostructured membranes for separations

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