دانلود رایگان مقاله لاتین نانوالیاف الکتروریسی استات سلولز از سایت الزویر
عنوان فارسی مقاله:
جذب بالا نانوالیاف الکتروریسی استات سلولز برای استفاده بهداشت زنان
عنوان انگلیسی مقاله:
High absorbency cellulose acetate electrospun nanofibers for feminine hygiene application
سال انتشار : 2016
برای دانلود رایگان مقاله نانوالیاف الکتروریسی استات سلولز اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
Menstrual hygiene is an important issue for every woman, as poor menstrual hygiene increases the vulnerability toward reproductive tract infections (RTIs) [1]. There are different types of feminine hygiene products commercially available, such as sanitary napkins, tampons, panty shields, wipes, and cosmetic removal pads. Among these, feminine sanitary pad/napkin is an important disposable absorbent hygiene product. Its functions are to absorb and retain menstrual fluid discharge and isolate it from skin, along with maintaining comfort, preventing odor, and staying in place [2]. To accomplish all these requirements, sanitary pads constitute different layers like cover stock, acquisition and distribution layer, absorbent core, back sheet, tissue, elastic wing, and siliconized paper [2]. Absorbent core gives the desired absorption capacity to sanitary pads and is mainly made up of hydrophilic cellulosic fibers such as wood-derived fluff pulp or viscose rayon [2]. As the diameter of these cellulosic fibers present in commercially available products is in the range offew tens of microns,their absorption capacity is less owing to their lower surface area. To improve the absorption capacity, some of the commercially available feminine hygiene products use superabsorbent polymers (SAPs) either in the form of granules within cellulosic fiber matrix or in the form of composite fabric layer [2].SAPs are commonly divided into two main classes, i.e., synthetic (petrochemical-based) and natural (polysaccharide- and polypeptide based) [3]. Most of these superabsorbents are produced from acrylic acid, its salt, and acrylamide [3]. The superabsorbents available in the market today are primarily based on cross-linked sodium polyacrylate (SPA) gels [2]. It facilitates in increasing the liquid absorption capacity and liquid retention capacity tremendously, thus allowing the product to be thinner with improved performance [2]. However,there are some harmful chemicals presentin the commercially available sanitary napkins. For example, dioxins are used to bleach the cotton/material used for making absorbent core, and it is responsible for side effects in the body such as pelvic inflammatory disease, ovarian cancer, immune system damage, impaired fertility and diabetes [4]. As mentioned above, SAPs are added to increase the absorption capacity, but in 1980s, use of SAPs was restricted in tampons due to its possible link with toxic shock syndrome, a potentially fatal illness caused by a bacterial toxin [5]. Further, as SAPs are petroleum-based products and therefore do not degrade readily in landfills, their use is not eco-friendly as well. Therefore, the objective of this work is to minimize the use of SAPs in feminine hygiene products considering their possible adverse health effects. For this, we intend to fabricate cellulosebased nanofibers and suggest their use as absorbent core in feminine hygiene products. The increased specific surface area of nanofibers as compared to micron-sized fibers present in commercial products also justifies well this objective and may compensate for the absorption capacity achieved by using SAPs.Electrospinning is one of the simple and cost-effective method used to synthesize fibers with diameter ranging from 10 nm to 10 m [6,7]. This method was invented by Formhals in 1934 [8]. Electrospinning process uses high electric field as a driving force to draw fibers from electrically charged polymer solution or polymer melt [6–10]. Electrospun fibers possess characteristics such as high surface-to-volume ratio, tunable porosity, and flexible morphology with controllable diameter [11], making them suitable for use in wide range of applications. Here, as we discussed above, we primarily aim to exploit the large surface area of electrospun nanofibers in achieving the high absorption capacity. In literature, cellulosic fibers have been used for absorption of water and other aqueous fluids [12]. However, solvents used for cellulose, such as ionic liquids, are not completely volatile and require coagulation step to get stable fibers [12]. On the other hand, cellulose derivatives such as cellulose acetate, hydroxypropyl cellulose and hydroxypropyl methyl cellulose [11,12], can be easily dissolved in different volatile solvents that makes them suitable for electrospinning. Among these derivatives, cellulose acetate is biocompatible, and a biopolymer which is easily available and has low cost[13]. It shows good hydrolytic stability and can be recycled in the environment by biodegradation [14]. Therefore, we choose cellulose acetate as a material to prepare nanofabric mat for its use as an absorbent core. In this article, electrospun nanofibers of cellulose acetate, with and without SPA encapsulation, were fabricated and characterized in terms of their surface morphology, mechanical properties, and comfort. To demonstrate their use in female hygiene application, different tests such as free absorbency, equilibrium absorbency, absorbency under load and percentage residue were performed in different mediums, i.e., distilled water, saline solution, and synthetic urine. The results obtained were then compared with some of the known commercially available feminine sanitary napkins.
برای دانلود رایگان مقاله نانوالیاف الکتروریسی استات سلولز اینجا کلیک نمایید.
کلمات کلیدی:
PDF]High absorbency cellulose acetate electrospun nanofibers for ... iranarze.ir/wp-content/uploads/2016/10/E266.pdf Here, we demonstrate the potential use of electrospun cellulose acetate (CA) nanofibers as a material for absorbent core in feminine sanitary napkins. [PDF]Nanofibers of Cellulose and Its Derivatives Fabricated Using Direct ... www.mdpi.com/1420-3049/20/5/9139/pdf by K Ohkawa - 2015 - Cited by 6 - Related articles May 19, 2015 - described a polymer material, cellulose acetate (CA), the nanofiber ... network of very thin fibers, are called “Electrospun Non-Woven Fabrics (ESNWs)”. ..... except for decreases in peak area due to absorption; Right, Only ... [PDF]Polyelectrolyte-Functionalized Nanofiber Mats Control the Collection ... www.mdpi.com/1996-1944/9/4/297/pdf by KA Rieger - 2016 - Related articles Apr 19, 2016 - promote hemostasis, fluid absorption, cell respiration, and gas ... cellulose nanofibers hydrolyzed from electrospun cellulose acetate nanofibers ... Electrospun Cellulose Acetate Nanofibers for Female Hygiene ... gyti.techpedia.in/project-detail/electrospun-cellulose-acetate-nanofibers-for.../3667 Dec 30, 2014 - Electrospun Cellulose Acetate Nanofibers For Female Hygiene ... of micro level cellulose derived fibers. the absorbency of these fibers are not ... Cellulose acetate electrospun nanofibrous membrane: fabrication ... link.springer.com/article/10.1007/s12034-016-1162-6 by N SULTANA - 2016 - Cited by 1 - Related articles The drug-loaded CA nanofibres showed antibacterial activity against ... Electrospinningscaffoldcellulose acetatecharacterizationdrug loadingantibacterial. Superhydrophobic, Hybrid, Electrospun Cellulose Acetate ... pubs.acs.org/doi/pdf/10.1021/acsami.6b05429 by O Arslan - 2016 - Cited by 3 - Related articles ABSTRACT: Electrospun cellulose acetate nanofibers (CA-NF) have been modified with perfluoro alkoxysilanes ... absorption characteristics, thermal stability,. Nanotech Could Give Us Safer, Greener Diapers and Sanitary Products https://www.elsevier.com/.../nanotech-could-give-us-safer,-greener-diapers-and-sanita... Sep 27, 2016 - Nanofibers are more absorbent and better for the environment, say ... a new material – made of electrospun cellulose acetate nanofibers ...
