The comparative study of nursing pads by electrospun cellulose acetate, polyethylene oxide and thermoplastic polyurethane nanofibers

This study summarizes the general information about nursing pads and novel electrospun nanofiber mats as potential component for nursing pads. It also compares electrospun thermoplastic polyurethane (TPU), cellulose acetate (CA) and polyethylene oxide (PEO) nanofibers with a polypropylene conventional disposable nursing pad (NP) in terms of hydrophilicity, breathability, air permeability and swelling properties. Nanofiber mats prepared by the electrospinning method have unique properties such as smooth surface, high specific surface area and high porosity with fine pores which will lead to improved wicking properties. These properties make nanofibers potential component for disposable nursing pads. Mean diameters of produced nanofibers were 284.39, 609.70 and 219.30 nm for CA, TPU and PEO, respectively. Water contact angle measurement revealed that these nanofibers show good wettability properties better than commercial nonwoven nursing mat and air permeability results revealed that these nanofibrous mats have considerably adequate permeability. Besides, water vapor permeability results showed these nanofibers still show good breathability despite their compact structure. © Published under licence by IOP Publishing Ltd

AUTEX 2009 - World textile conference

The ninth annual conference of the Association of Universities for Textiles (AUTEX) was held in Turkey on 26-28 May 2009. The conference involved presentations on innovative and intelligent production for high added value textiles and oriented fibrous materials for civil engineering applications. A session on e-activities and supply chain management, comprised presentations on a new concept of supply chain model in the Egyptian garment industry, measuring QR in globalized apparel supply chains, and a research on electronic trade and web-based 3-D modeling. The sessions on technical textiles involved presentations on synthesis of hydrogels for macro and micro forms of final polymeric networks and the development of composite materials reinforced by nonwoven structures based on esparto grass. The effects of polymer concentration on the properties of electrospun polyester nanosurfaces along with the development of durable nanosol coatings were also discussed in the conference

The Removal of Reactive Red 141 from Wastewater: A Study of Dye Adsorption Capability of Water-Stable Electrospun Polyvinyl Alcohol Nanofibers

The dye production and its use in textile and related industries resulted in discharge of dye to wastewater. Adsorption for color removal is known as equilibrium separation process, and the resultant decolorization is influenced by physicochemical factors such as adsorbent surface area. The nanofiber membranes prepared by the electrospinning method have controllable nanofiber diameter and pore size distribution (PSD) with a high surface area to volume or mass ratio. In this study, polyvinyl alcohol (PVA) nanofibrous membranes were prepared by the electrospinning method at different collection times such as 3, 5 and 10 h and heat fixated at 130, 150 and 170°C for 10 min, and then, the adsorption capability of PVA nanofiber membranes for Reactive Red 141 from aqueous solution was investigated. In order to make PVA nanofibers stable to water, the nanofibrous membranes were chemically cross-linked by a polycarboxylic acid (1,2,3,4 butanetetracarboxylic acid (BTCA)). PVA nanofibrous membranes were characterized by scanning electron microscopy, thermogravimetric analysis, swelling tests and pore size analysis. The results indicated that BTCA crosslinking improved the thermal and water stability of the nanofibrous structure but has no significant effect on the pore sizes of the membranes. Adsorption of Reactive Red 141 was studied by the batch technique, and it was observed that PVA nanofibers removed approximately >80% of the dye. © 2019 Çigdem Akduman et al., published by Sciendo

The treatment of waste water of dyeing by fenton oxidation in presence and absence of ultrasound

In this study, degradation of Reactive Red 141 (RR141) present in textile dyeing waste water was investigated by catalytic wet hydrogen peroxide oxidation over iron-containing ZSM-5 zeolite catalysts prepared by ion-exchange and hydrothermal synthesis methods. Higher decolorization (18.3%) and degradation (17.6%) degrees were obtained by waste water of dyeing with 0.5 wt% over ion-exchanged FeZSM-5 catalyst than those with waste water of dyeings in high dye concentration. Color removal was increased with H2O2 amount (up to 5 mmol) added to the reaction mixture. Decolorization degree increased from 15.7% to 18.6% in the combination of CWPO and ultrasound for waste water of dyeing with 0.5 wt%. However, as the concentration of dye in the waste water increased, the positive effect of ultrasound on decolorization disappeared

Preparation and characterization of naproxen-loaded electrospun thermoplastic polyurethane nanofibers as a drug delivery system

The design and production of drug-loaded nanofiber based materials produced by electrospinning is of interest for use in innovative drug delivery systems. In the present study, ultra-fine fiber mats of thermoplastic polyurethane (TPU) containing naproxen (NAP) were successfully prepared by electrospinning from 8 and 10% (w/w) TPU solutions. The amount of NAP in the solutions was 10 and 20% based on the weight of TPU. The collection period of the drug-loaded electrospun TPU fibers was 5, 10 and 20 h, and they were characterized by FTIR, DSC and TGA analysis. The morphology of the NAP-loaded electrospun TPU fiber mats was smooth, and the average diameters of these fibers varied between 523.66 and 723.50 nm. The release characteristics of these fiber mats were determined by the total immersion method in the phosphate buffer solution at 37°C. It was observed that the collection period in terms of the mat thickness played a major role in the release rate of NAP from the electrospun TPU mats. © 2016 Elsevier B.V. All rights reserved

Equalizing Effect of ß-cyclodextrin on dyeing or polyamide 6,6 woven fabrics with acid dyes

Cyclodextrins (CD) are produced from starch by the action of cyclodextrin glycosyltransferase (CGTase) enzyme. Structurally, cyclodextrins consist of 6, 7, or 8 (?, ß, and y cyclodextrins, respectively) D-glucopyranosyl units connected by ?-(1,4) glycosidic linkages. Having polar and hydrophilic outer sides and hydrophobic cavitation gives cyclodextrins a chance to form inclusion complexes with dyes in hydrophilic mediums. In this research, the equalizing effect of ß-cyclodextrins in dyeing of polyamide 6,6 wo ven fabrics with 6 different acid dyes were investigated. From the experimental results, it was determined that the ß-cyclodextrin shows a retarding and equalizing effect in dyeings carried out with the dyes that show interaction with ß-CD. © 2006 Wiley Periodicals, Inc

Development and characterization of naproxen-loaded poly(vinyl alcohol) nanofibers crosslinked with polycarboxylic acids

Poly(vinyl alcohol) (PVA) hydrogel nanofibers are a potential candidate for textile-based drug-release applications. Polycarboxylic acids 1,2,3,4-butanetetracarboxylic acid (BTCA) and citric acid (CA) are low-cost alternatives reported to easily crosslink electrospun PVA hydrogel. These can be directly added into the spinning solutions. One of the most efficient non-steroidal anti-inflammatory drugs (NSAIDs), Naproxen (NAP), was selected as a model drug for this study. The release mechanisms of drug-loaded electrospun PVA nanofibers are based on the diffusion of the drugs through the swollen PVA fibrous matrix and the release due to partial dissolution of the matrix. Control over drug-release characteristics can be provided through partial crosslinking of the PVA fibrous matrix. © 2018, American Association of Textile Chemists and Colorists. All rights reserved

Energy and exergy analysis of stenter exhaust air heat recovery system for heat-setting processes [Termofi'ksaj i'şlemleri' i'çi'n ramöz atik havasindan isi geri' kazanim si'stemi'ni'n enerji' ve ekserji' anali'zi']

Energy recovery applications are of great importance for sustainable production with regard to efficient use of natural sources. Textile finishing processes generates large amount of waste energy. Recovery of this waste energy provides both economic and environmental benefits. In the scope of this study, heat recovery from the exhaust air of textile stenters was analysed. Process water is heated by the exhaust air of thermosetting process in an industrial scale heat recovery system retrofitted to a stenter. Thermodynamic model of the system was presented by energy and exergy analyses. Mass flow rate of water was observed to be the most significant parameter that affects the temperature of water outlet. 70-75 °C water outlet temperatures can be obtained at lower waste water mass flow rates. Decrease in the mass flow rate of water led to decrease in exergy destruction and increase in exergy efficiency. Exergy efficiency of the system was calculated between 10% and 30% depending on the mass flow rate of water

The effects of activator on whiteness and hydrohility during the hydrogen peroxide bleaching

Hydrogen peroxide bleaching is a common bleaching process in the textile finishing. Rate of hydrogen peroxide decreasing is very important for effective, economical and problem-free bleaching process. Optimal temperature, pH, concentrations of hydrogen peroxide and stabilizers are used in the bleaching bath to bleach the cotton fabric effectively. In the study, it is tried to optimize the bleaching recipes in terms of hydrophility and whiteness degree