Opening size determination of technical textiles used in agricultural applications

Nanofibers produced by electrospinning method are widely used for drug delivery, as tissue scaffolding materials and filtration purposes where specific pore characteristics are required. For continued growth in these areas, it is critical that the nanofibers be properly designed for these applications to prevent failure. Most of the current methods only provide an indirect way of determining pore structure parameters and contain inherent disadvantages. In this study, we developed a novel image analysis method for measuring pore characteristics of electrospun nanofiber webs. Five electrospun webs with different pore characteristics were analyzed by this method. The method is direct, very fast, and presents valuable and comprehensive information regarding pore structure parameters of the webs. Two sets of simulated images were generated to study the effects of web density, fiber diameter and its variations on pore characteristics. The results indicated that web density and fiber diameter significantly influence the pore characteristics, whereas the effect of fiber diameter variations was insignificant.

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“…The ratio equals 1 for uniform openings and increases with decreasing uniformity of the openings [11].…”

Section: July 2008mentioning

confidence: 92%

“…Nevertheless, for two-dimensional textiles such as woven fabrics and relatively thin nonwovens it is often assumed that porosity and POA are equal [11].…”

Section: July 2008mentioning

confidence: 99%

Evaluation of electrospun nanofiber pore structure parameters

Ziabari

Mottaghitalab

Haghi

2008

Korean J. Chem. Eng.

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“…Relative open area (ROA) was then calculated by computing the area fraction of background to nanofiber material. Fiber porosity and ROA have been found to be equivalent in randomly organized structures [74]. Based on the inherent randomness of fiber alignment, this assumption was applied to our porosity assessment.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of poly(lactic-co-glycolic acid) and poly( dl -lactide-co-ε-caprolactone) electrospun fibers for the treatment of HSV-2 infection

Aniagyei

Sims

Malik

et al. 2017

Materials Science and Engineering: C

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More diverse multipurpose prevention technologies are urgently needed to provide localized, topical pre-exposure prophylaxis against sexually transmitted infections (STIs). In this work, we established the foundation for a multipurpose platform, in the form of polymeric electrospun fibers (EFs), to physicochemically treat herpes simplex virus 2 (HSV-2) infection. To initiate this study, we fabricated different formulations of poly(lactic-co-glycolic acid) (PLGA) and poly(DL-lactide-co-ε-caprolactone) (PLCL) EFs that encapsulate Acyclovir (ACV), to treat HSV-2 infection in vitro. Our goals were to assess the release and efficacy differences provided by these two different biodegradable polymers, and to determine how differing concentrations of ACV affected fiber efficacy against HSV-2 infection and the safety of each platform in vitro. Each formulation of PLGA and PLCL EFs exhibited high encapsulation efficiency of ACV, sustained-delivery of ACV through one month, and in vitro biocompatibility at the highest doses of EFs tested. Additionally, all EF formulations provided complete and efficacious protection against HSV-2 infection in vitro, regardless of the timeframe of collected fiber eluates tested. This work demonstrates the potential for PLGA and PLCL EFs as delivery platforms against HSV-2, and indicates that these delivery vehicles may be expanded upon to provide protection against other sexually transmitted infections.

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“…The POA ε of a woven geotextile under certain strains is expressed as follows: The equivalent diameter of a pore can be calculated from its area. The equivalent square area of a rectangular or irregular opening is used to determine the equivalent dimension (Dierickx, 1999), as shown in Fig. 3.…”

Section: Analytical Solution Of the Per Cent Open Areamentioning

confidence: 99%

“…Then, the equivalent pore size of each pore can be calculated from the method of Dierickx (1999). The experimental pore size distributions (PSDs) of the selected strains were obtained according to the cumulated frequency of the equivalent pore size, as presented in Fig.…”

Section: Pore Size Distributionmentioning

confidence: 99%