scholarly journals POLY(VINYL ALCOHOL) AND POLY(VINYL ALCOHOL) /ZINC OXIDE COMPOSITE NANOFIBRE WEBS: QUALITY CONTROL WITH CONDUCTOMETER

2017 ◽  
Vol 3 ◽  
pp. 316
Author(s):  
Eva Trumsina ◽  
Zane Zelca ◽  
Silvija Kukle
Keyword(s):  
Quality Control ◽  
Zinc Oxide ◽  
Sample Preparation ◽  
Vinyl Alcohol ◽  
Textile Industry ◽  
Poly Vinyl Alcohol ◽  
Distilled Water ◽  
Textile Materials ◽  
It Impacts ◽  
Nano Size

In the market a wide variety of products are find that contains/releases metal nanoparticles, therefore topical become researches on it impacts on the environment and human health. In the textile industry important step is the development of testing methodology to monitor the quantity of nanoparticles that get into the environment from nanoparticles containing textile materials. In the study analyzed the method based on the use of conductometer for textiles testing with nano-size metal oxides content to determine the persistence of nanoparticles/ions in the water after textile soaking/washing. Compared results acquired in the experiments with nanofibre webs manufactured by electrospinning from pure polyvinyl alcohol (PVA) and PVA/ZnO composite. The nanofibre webs were soaked in distilled water and obtained samples of water tested with conductometer. The results of the experiments confirm that measurements taken with the conductometer are fairly stable and repeatable; the equipment is suitable for measurements in distilled water for nanoparticles/ions detection. The measurements of the solution’s specific electric conductance allows to pinpoint the nanoparticles/ions concentration, but for this purpose, must be created the database that contains the resources needed for the calculations and methodology for sample preparation.

scholarly journals Active Role of ZnO Nanorods in Thermomechanical and Barrier Performance of Poly(vinyl alcohol-co-ethylene) Formulations for Flexible Packaging

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 922 ◽  
Author(s):  
Francesca Luzi ◽  
Alessandro Di Michele ◽  
Luigi Torre ◽  
Debora Puglia
Keyword(s):  
Zinc Oxide ◽  
Vinyl Alcohol ◽  
Zno Nanorods ◽  
Accelerated Aging ◽  
Active Role ◽  
Zinc Oxide Nanorods ◽  
Poly Vinyl Alcohol ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Oxide Nanorods

Poly(vinyl alcohol-co-ethylene) (EVOH) films containing zinc oxide nanorods (ZnO Nrods) at 0.1, 0.5, and 1 wt%, were realized by solvent casting. The effect of ZnO Nrods content on morphological, thermal, optical, mechanical, and oxygen permeability properties were analyzed. In addition, moisture content and accelerated-aging test studies were performed, with the intention to determine the influence of zinc oxide nanofillers on the functional characteristics of realized packaging systems. Tensile properties showed increased values for strength and deformation-at-break in EVOH-based formulations reinforced with 0.1 and 0.5 wt% of zinc oxide nanorods. Results from the colorimetric and transparency investigations underlined that the presence of ZnO Nrods in EVOH copolymer did not induce evident alterations. In addition, after the accelerated-aging test, the colorimetric test confirmed the possibility for these materials to be used in the packaging sector. This behavior was induced by the presence of zinc oxide nanofillers that act as a UV block that made them useful as an efficient absorber of UV radiation.

Synthesis of Poly(vinyl alcohol)/Chitosan/Titanium Oxide Beads

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
Syazwan Liyana Sulaiman ◽  
Zawati Harun ◽  
Sufizar Ahmad ◽  
Hariati Taib
Keyword(s):  
Wastewater Treatment ◽  
Titanium Oxide ◽  
Alkaline Solution ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Distilled Water ◽  
Swelling Properties ◽  
Promising Alternative ◽  
Porous Beads ◽  
Mean Time

The application of photocatalytic beads in wastewater treatment application has gained attention of many researchers. In this study, the synthesised poly(vinyl alcohol)/chitosan/Titanium oxide (PVA/CS/TiO2) beads has been considered as a promising alternative to conventional means of wastewater treatment. The present study has successfully synthesised PVA/CS/TiO2 beads through simple dropwise method in which varied concentration of CS from 1.0 g to 2.5 g. Morphological analysis of the synthesised PVA/CS/TiO2 beads investigated by the FE-SEM technique revealed that porous beads were obtained regardless of the varied CS concentration content. Furthermore, solubility and swelling properties investigation of the beads were also performed within the prescribed time of 24h in three different medium which were acidic, distilled water and alkaline solution. Result of solubility test proved that PVA/CS/TiO2 beads were insoluble only in distilled water and alkaline solution. However, the beads were found to dissolve in acidic solution due to the CS content. Meanwhile, the swelling test revealed that increased concentration of CS leads to swelling of beads in distilled water and alkaline solution. Results revealed that beads with the highest CS composition which is 2.5 g recorded 82.6% and 118.4% of swelling in distilled water and alkaline solution, respectively. In the mean time, beads with the lowest CS composition which is 1.0 g only swell for 65.8% and 93.3% in distilled water and alkaline solution, respectively. As a conclusion, the synthesised beads in this study is feasible to be applied in natural to alkaline environment.

Defining Structure in Electrospun Polymer Fibres

2008 ◽  
Vol 55-57 ◽  
pp. 33-36
Author(s):  
G.R. Mitchell ◽  
M. Belal ◽  
F.J. Davis ◽  
D.E. Elliott ◽  
M. Kariduraganavar ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Polyethylene Oxide ◽  
Self Assembly ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
X Ray ◽  
Amorphous System ◽  
Composite Systems ◽  
X Ray Scattering ◽  
Nano Size

We use a combination of microscopy, x-ray scattering and neutron scattering to show how structure develops in micro and nano-size polymer fibres prepared by electrospinning. The technique has been applied to a range of different polymers, an amorphous system (polystyrene), a crystallisable polymer (poly-ε-caprolactone), a composite systems (polyethylene oxide or poly vinyl alcohol containing polypyrrole) and consider the possibility of self assembly (gelatin).

scholarly journals Oriented ZnO nanoflowers obtained after calcination of electrospinning poly(vinyl alcohol)/zinc oxide/zinc acetate composite mats

2021 ◽  
Author(s):  
Anchan Khankhean ◽  
Wantana Kuratsameethong ◽  
Somtop Santibenchakul ◽  
Apirat Laobuthee ◽  
Masataka Sugimoto ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Vinyl Alcohol ◽  
Zinc Acetate ◽  
Poly Vinyl Alcohol

Effect of ZnO Concentration on the Diameter of Electrospun Fibers from Poly(Vinyl Alcohol) Composited with ZnO Nanoparticles

2018 ◽  
Vol 759 ◽  
pp. 81-85
Author(s):  
Tongsai Jamnongkan ◽  
Supranee Kaewpirom ◽  
Amnuay Wattanakornsiri ◽  
Rattanaphol Mongkholrattanasit
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Vinyl Alcohol ◽  
Biomedical Applications ◽  
Processing Parameters ◽  
Poly Vinyl Alcohol ◽  
Electrospun Fibers ◽  
Zno Nanoparticle ◽  
The World ◽  
Potential Use

Recently, the composited nanofiber attraction has been growing from researchers across the world due to its exciting opportunities for use in biomedical applications. In this study, we fabricated electrospun fibers from poly (vinyl alcohol) (PVA) composited with Zinc Oxide (ZnO) nanoparticle for potential use in biomedical applications. From the experimental results, there was not any chemical bonding between the ZnO nanoparticles and the PVA molecules. The effect of concentration of ZnO nanoparticles in PVA solution on the diameter of electrospun fibers was found that the diameter of electrospun fibers increased with raising the concentration of suspended ZnO nanoparticles in solution. This is probably because the effect of nanoparticles on the diameter of electrospun fibers was through their effect on the viscosity of solution. In addition, we found that the diameter of electrospun fibers depended on the solution and processing parameters.

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