Highly porous fibers prepared by electrospinning a ternary system of nonsolvent/solvent/poly(l-lactic acid)

Qi, Zhonghua; Yu, Hao; Chen, Yanmo; Zhu, Meifang

doi:10.1016/j.matlet.2008.10.059

Cited by 160 publications

(131 citation statements)

References 15 publications

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“…One of the polymers, either from the core or the shell of the spun fibers, is dissolved to achieve porous nanofibers. There are a few other methods for fabricating porous nanofibers, such as phase separation by vapor, non-solvent and thermally induced phase separation [97][98][99], rapid phase separation [100,101], selective dissolution [102], and selective calcination [102,103].…”

Section: Hollow and Porous Nanofibersmentioning

confidence: 99%

Recent Advances in the Synthesis of Metal Oxide Nanofibers and Their Environmental Remediation Applications

Mondal

2017

Inventions

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Recently, wastewater treatment by photocatalytic oxidation processes with metal oxide nanomaterials and nanocomposites such as zinc oxide, titanium dioxide, zirconium dioxide, etc. using ultraviolet (UV) and visible light or even solar energy has added massive research importance. This waste removal technique using nanostructured photocatalysts is well known because of its effectiveness in disintegrating and mineralizing the unsafe organic pollutants such as organic pesticides, organohalogens, PAHs (Polycyclic Aromatic Hydrocarbons), surfactants, microorganisms, and other coloring agents in addition to the prospect of utilizing the solar and UV spectrum. The photocatalysts degrade the pollutants using light energy, which creates energetic electron in the metal oxide and thus generates hydroxyl radical, an oxidative mediator that can oxidize completely the organic pollutant in the wastewater. Altering the morphologies of metal oxide photocatalysts in nanoscale can further improve their photodegradation efficiency. Nanoscale features of the photocatalysts promote enhance light absorption and improved photon harvest property by refining the process of charge carrier generation and recombination at the semiconductor surfaces and in that way boost hydroxyl radicals. The literature covering semiconductor nanomaterials and nanocomposite-assisted photocatalysis-and, among those, metal oxide nanofibers-suggest that this is an attractive route for environmental remediation due to their capability of reaching complete mineralization of organic contaminants under mild reaction conditions such as room temperature and ambient atmospheric pressure with greater degradation performance. The main aim of this review is to highlight the most recent published work in the field of metal oxide nanofibrous photocatalyst-mediated degradation of organic pollutants and unsafe microorganisms present in wastewater. Finally, the recycling and reuse of photocatalysts for viable wastewater purification has also been conferred here and the latest examples given.

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Section: Hollow and Porous Nanofibersmentioning

confidence: 99%

Recent Advances in the Synthesis of Metal Oxide Nanofibers and Their Environmental Remediation Applications

Mondal

2017

Inventions

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“…6 The lower porosity of fibers obtained using DMSO as the solvent system could be a result of its nonvolatile nature; however, the confined geometry of the outlet pipette had a significant impact on porosity as a result of spatial restriction. 50µm 10µm 10µm 5µm Figure 2 Field electron scanning electron microscopy images of porous microfibers extruded using CH 2 Cl 2 (20 mm in diameter (a)) and dimethylsulfoxide (5-10 mm in diameter (b)) as solvents.…”

Section: Resultsmentioning

confidence: 99%

Spontaneous extrusion of porous amphiphilic triblock copolymeric microfibers under microfluidic conditions

Marimuthu

Kim

2010

Polym J

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“…These have been employed in several areas of tissue engineering and drug delivery (encapsulation and controlled drug release systems) (65)(66)(67). Various biodegradable (e.g.…”

Section: Porous Polymeric Carriersmentioning

confidence: 99%

“…Various biodegradable (e.g. PCL (65), poly (Llactic acid) (PLLA) (66), PLGA (68)) and non-biodegradable (e.g. polystyrene (69)) polymers has been used.…”

Section: Porous Polymeric Carriersmentioning

confidence: 99%

Porous Inorganic Drug Delivery Systems—a Review

et al. 2017

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Innovative methods and materials have been developed to overcome limitations associated with current drug delivery systems. Significant developments have led to the use of a variety of materials (as excipients) such as inorganic and metallic structures; marking a transition from conventional polymers. Inorganic materials, especially those possessing significant porosity, are emerging as good candidates for the delivery of a range of drugs (anti-biotics, anti-cancer and anti-inflammatories), providing several advantages in formulation and engineering (encapsulation of drug in amorphous form, controlled delivery and improved targeting). This review focuses on key selected developments in porous drug delivery systems. The review provides a short broad overview of porous polymeric materials for drug delivery before focusing on porous inorganic materials (e.g. Santa Barbara Amorphous (SBA) and Mobil Composition of Matter (MCM)) and their utilisation in drug dosage form development. Methods for their preparation and drug loading thereafter are detailed. Several examples of porous inorganic materials, drugs used and outcomes are discussed providing the reader with an understanding of advances in the field and realistic opportunities.

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Highly porous fibers prepared by electrospinning a ternary system of nonsolvent/solvent/poly(l-lactic acid)

Cited by 160 publications

References 15 publications

Recent Advances in the Synthesis of Metal Oxide Nanofibers and Their Environmental Remediation Applications

Recent Advances in the Synthesis of Metal Oxide Nanofibers and Their Environmental Remediation Applications

Spontaneous extrusion of porous amphiphilic triblock copolymeric microfibers under microfluidic conditions

Porous Inorganic Drug Delivery Systems—a Review

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