scholarly journals Polymeric Nanofibers and Nanofiber Webs: A New Class of Nonwovens

2003 ◽  
Vol os-12 (1) ◽  
pp. 1558925003os-12 ◽  
Author(s):  
Timothy Grafe ◽  
Kristine Graham
Keyword(s):  
Glass Fibers ◽  
Value Added ◽  
Electrospun Nanofibers ◽  
Electrospinning Process ◽  
Synthetic Fiber ◽  
Air Filtration ◽  
New Class ◽  
Filtration Barrier ◽  
Polymeric Nanofibers ◽  
Micron Diameter

Nanofiber is a broad phrase generally referring to a fiber with a diameter less than 1 micron. While glass fibers have existed in the sub-micron range for some time and polymeric meltblown fibers are just beginning to break the micron barrier, 0.25 micron diameter electrospun nanofibers have been manufactured and used commercially for air filtration applications for more than twenty years. Several value-added nonwoven applications, including filtration, barrier fabrics, wipes, personal care, medical and pharmaceutical applications may benefit from the interesting technical properties of commercially available nanofibers and nanofiber webs. This paper will discuss the electrospinning process for making nanofibers and nonwoven nanofiber webs from synthetic fiber-forming polymers. The resulting physical characteristics of the nanofiber webs will be discussed. In order to provide a useful context for the nonwovens industry, nanofiber webs will be compared to both melt-blown and spunbond nonwovens. The description and comparison of the properties should provide product designers in the nonwovens industry with the tools to generate product and applications ideas about new uses for nanofibers.

Advancements in Electrospun Nanofiber Technology Reduce Gas Turbine Compressor Fouling

2005 ◽  
Author(s):  
Thomas C. Gahr ◽  
James D. Benson ◽  
Kristine Graham ◽  
Mark Gogins ◽  
Michael Brown
Keyword(s):  
Gas Turbine ◽  
Laboratory Testing ◽  
Electrospun Nanofibers ◽  
Air Filtration ◽  
Electrospun Nanofiber ◽  
Media Technology ◽  
Test Program ◽  
Filtering Efficiency ◽  
Micron Diameter ◽  
Gas Turbine Compressor

It is well established that sub-micron ambient aerosol contamination of the intake air can produce fouling of the gas turbine compressor and result in a reduction of power output. Application of electrospun nanofibers of 0.25 micron diameter to a conventional filter media substrate has been demonstrated to improve the efficiency of gas turbine intake filters to remove sub-micron contaminate. The benefits of nanofiber filtration have been proven through use in gas turbine intake air filtration and other industrial and defense filtration applications for over twenty years. Recent advancements in electrospun nanofiber media technology have increased the filtering efficiency of gas turbine intake filters, with minimal differences in filter element pressure loss. These advances have also improved the durability of nanofibers in high temperature and high humidity applications. This paper discusses the laboratory testing that demonstrates these performance and durability improvements. A comparative field test program demonstrates the capability of nanofiber filtration to significantly reduce the fouling of gas turbine compressors.

Antibacterial Polymeric Nanofibers from Zwitterionic Terpolymers by Electrospinning for Air Filtration

2020 ◽  
Author(s):  
Santosh Kumar ◽  
Jospeh Jang ◽  
Hyemin Oh ◽  
Byung Ju Jung ◽  
Yanghwa Lee ◽  
...  
Keyword(s):  
Air Filtration ◽  
Polymeric Nanofibers

scholarly journals Production of polymeric nanofibers with different conditions of the electrospinning process

2017 ◽  
Vol 22 (2) ◽  
Author(s):  
Bruna da Silva Vaz ◽  
Jorge Alberto Vieira Costa ◽  
Michele Greque de Morais
Keyword(s):  
Electrospinning Process ◽  
Polymeric Nanofibers

scholarly journals Energy-Saving Electrospinning with a Concentric Teflon-Core Rod Spinneret to Create Medicated Nanofibers

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2421 ◽  
Author(s):  
Shixiong Kang ◽  
Shicong Hou ◽  
Xunwei Chen ◽  
Deng-Guang Yu ◽  
Lin Wang ◽  
...  
Keyword(s):  
Energy Saving ◽  
Energy Savings ◽  
Ex Vivo ◽  
Low Cost ◽  
Electrospun Nanofibers ◽  
Electrospinning Process ◽  
Water Soluble ◽  
Drug Dissolution ◽  
Core Rod

Although electrospun nanofibers are expanding their potential commercial applications in various fields, the issue of energy savings, which are important for cost reduction and technological feasibility, has received little attention to date. In this study, a concentric spinneret with a solid Teflon-core rod was developed to implement an energy-saving electrospinning process. Ketoprofen and polyvinylpyrrolidone (PVP) were used as a model of a poorly water-soluble drug and a filament-forming matrix, respectively, to obtain nanofibrous films via traditional tube-based electrospinning and the proposed solid rod-based electrospinning method. The functional performances of the films were compared through in vitro drug dissolution experiments and ex vivo sublingual drug permeation tests. Results demonstrated that both types of nanofibrous films do not significantly differ in terms of medical applications. However, the new process required only 53.9% of the energy consumed by the traditional method. This achievement was realized by the introduction of several engineering improvements based on applied surface modifications, such as a less energy dispersive air-epoxy resin surface of the spinneret, a free liquid guiding without backward capillary force of the Teflon-core rod, and a smaller fluid–Teflon adhesive force. Other non-conductive materials could be explored to develop new spinnerets offering good engineering control and energy savings to obtain low-cost electrospun polymeric nanofibers.

Electrospun nanofibers for high-performance air filtration

2019 ◽  
Vol 15 ◽  
pp. 6-19 ◽  
Author(s):  
Yuyao Li ◽  
Xia Yin ◽  
Jianyong Yu ◽  
Bin Ding
Keyword(s):  
High Performance ◽  
Electrospun Nanofibers ◽  
Air Filtration

scholarly journals Nanostructured Fibers Containing Natural or Synthetic Bioactive Compounds in Wound Dressing Applications

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2407 ◽  
Author(s):  
Alexa-Maria Croitoru ◽  
Denisa Ficai ◽  
Anton Ficai ◽  
Natalia Mihailescu ◽  
Ecaterina Andronescu ◽  
...  
Keyword(s):  
Wound Healing ◽  
Healing Process ◽  
Electrospun Nanofibers ◽  
Natural Compounds ◽  
Electrospinning Process ◽  
Wound Dressings ◽  
Wound Healing Process ◽  
Skin Substitutes ◽  
Bioactive Constituents ◽  
Electrospinning Method

The interest in wound healing characteristics of bioactive constituents and therapeutic agents, especially natural compounds, is increasing because of their therapeutic properties, cost-effectiveness, and few adverse effects. Lately, nanocarriers as a drug delivery system have been actively investigated and applied in medical and therapeutic applications. In recent decades, researchers have investigated the incorporation of natural or synthetic substances into novel bioactive electrospun nanofibrous architectures produced by the electrospinning method for skin substitutes. Therefore, the development of nanotechnology in the area of dressings that could provide higher performance and a synergistic effect for wound healing is needed. Natural compounds with antimicrobial, antibacterial, and anti-inflammatory activity in combination with nanostructured fibers represent a future approach due to the increased wound healing process and regeneration of the lost tissue. This paper presents different approaches in producing electrospun nanofibers, highlighting the electrospinning process used in fabricating innovative wound dressings that are able to release natural and/or synthetic substances in a controlled way, thus enhancing the healing process.

Green Electrospun Nanofibers and Their Application in Air Filtration

2018 ◽  
Vol 303 (12) ◽  
pp. 1800336 ◽  
Author(s):  
Dan Lv ◽  
Miaomiao Zhu ◽  
Zhicheng Jiang ◽  
Shaohua Jiang ◽  
Qilu Zhang ◽  
...  
Keyword(s):  
Electrospun Nanofibers ◽  
Air Filtration

scholarly journals Fiber Generators in Needleless Electrospinning

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Haitao Niu ◽  
Tong Lin
Keyword(s):  
Production Rate ◽  
Scale Up ◽  
Electrospun Nanofibers ◽  
Scaling Up ◽  
Electrospinning Process ◽  
Recent Advances ◽  
Needleless Electrospinning ◽  
Application Potential

The conventional electrospinning often uses a needle-like nozzle to produce nanofibers with a very low production rate. Despite the enormous application potential, needle electrospun nanofibers meet difficulties in broad applications in practice, due to the lack of an economic and efficient way to scale up the electrospinning process. Recently, needleless electrospinning has emerged as a new electrospinning mode and shown ability to produce nanofibers on large-scales. It has been established that the fiber generator, also referred to as “spinneret” in this paper, in needleless electrospinning plays a key role in scaling up the nanofiber production. This paper summarizes the recent advances in the development of needleless spinnerets and their influences on electrospinning process, nanofiber quality, and productivity.

A Study on Electrospun Nanofibrous Mats for Local Antibiotic Delivery

2013 ◽  
Vol 829 ◽  
pp. 510-514 ◽  
Author(s):  
Mahboubeh Maleki ◽  
Mohammad Amani-Tehran ◽  
Masoud Latifi ◽  
Sanjay Mathur
Keyword(s):  
Structural Characteristics ◽  
Electrospun Nanofibers ◽  
Electrospinning Process ◽  
Static System ◽  
Antibiotic Drug ◽  
Paper Fabrication ◽  
Antibiotic Release ◽  
Reduced Toxicity ◽  
Local Antibiotic ◽  
Antibiotic Delivery

The demand for novel antibiotic-loaded electrospun nanofibrous structures has increased extremely in the recent years and has engaged the interests of scientists and engineers into a blend configuration of antibiotic drug and biocompatible polymers due to their unique applications in future of better therapeutic effect, reduced toxicity and sustained local antibiotic release over a period of time. One method to produce these antibiotic-loaded networks is by electrospinning process. However, it is very important to know structural characteristics and morphology of nanofibers for controlling the performance of the yields. In this paper, fabrication of electrospun nanofibers suited for antibiotic delivery system is investigated based on tetracycline hydrochloride as the antibiotic drug and poly (lactic-co-glycolic acid) as the biodegradable polymeric matrix. Furthermore, the effect of material and process parameters on morphology and release behavior of produced nonwovens is investigated. The efficacy of the medicated scaffolds using a static system for bacterial growth on agar plates was also proved.

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