scholarly journals Effect of zno nanoparticles on diameter of bubbfil PVA/ZnO nanofibers

2015 ◽  
Vol 19 (4) ◽  
pp. 1447-1449
Author(s):  
Cui-Juan Ning ◽  
Hua Liu ◽  
Na Si ◽  
Ji-Huan He
Keyword(s):  
Size Distribution ◽  
Poisson Distribution ◽  
Gaussian Distribution ◽  
Zno Nanoparticles ◽  
Nano Zno ◽  
Fiber Size ◽  
Zno Nanofibers

The PVA/ZnO nanofibers are obtained by the bubbfil spinning. Distribution of fiber size is tenable by nano-ZnO concentration. Experiment reveals fiber size distribution changes from Gaussian distribution to Poisson distribution when ZnO concentration varies gradually from 2 wt.% to 15 wt.%.

Role of Zno Nanoparticles in Enhancing the Antimicrobial Property of Nitrocellulose Lacquer Wood Finish

2019 ◽  
Vol 12 (1) ◽  
pp. 91-98
Author(s):  
Shikhar Shukla ◽  
Shailendra Kumar ◽  
Ismita Nautiyal ◽  
Kishan Kumar V.S
Keyword(s):  
Antimicrobial Activity ◽  
Zno Nanoparticles ◽  
Antimicrobial Property ◽  
Economic Loss ◽  
Analysis Data ◽  
Wood Products ◽  
Mould Growth ◽  
Neem Oil ◽  
Nano Zno ◽  
Aesthetic Appearance

Background: Mould growth on coated wood products during shipment is the foremost apprehension for most of the wood industries in India. Well finished wood products tend to get deposited by staining moulds superficially in high humidity conditions during shipment. Though wood disfiguring fungi (stain moulds) normally have no significant effect on the mechanical properties of timber, they only affect the aesthetic appearance of the material without destructing the wood cell wall. This causes a huge economic loss to the manufacturer due to disfigurement of the appearance of wood products. Methods: The aim of this work is to test and enhance antimicrobial property of Nitrocellulose lacquer wood finish to prevent mould deposition on coated wood products. The work was carried out to screen and evaluate the antimicrobial activity of commercial Nitrocellulose lacquer. Several patents regarding antimicrobial activity of nano metal oxides have been visited. In order to enhance the mould resistance of this coating, its combinations with neem oil and ZnO nanoparticles were prepared and tested against the growth of staining moulds: Aspergillus niger and Penicillium sp. on the wood substrate of Melia dubia. The study was carried out for 500 hours under favorable conditions (Temperature and Relative Humidity (RH)) for the mould growth. The growth was analysed on the basis of surface area affected by stain moulds on coated wood samples. Results: The growth analysis data inferred that the ZnO nanoparticles had significant effect against the growth of stain moulds. The presence of ZnO nanoparticles increased the mould growth resistance of Nitrocellulose lacquer coating to a great extent compared to the ability of neem oil for the same. This finding demonstrates the potential use of nano ZnO for increasing the effectiveness of NC lacquer against mould growth without hampering its other properties. Conclusion: 1 % nano ZnO concentration in Nitrocellulose lacquer wood coating increased its efficacy against staining mould growth by 95 %.

scholarly journals A facile microwave-assisted synthesis of ZnO nanoparticles and their photocatalytic activity: Effect of pH

2021 ◽  
Vol 18 (2) ◽  
pp. 3-8
Author(s):  
Aura S. Merlano ◽  
Ángel Salazar
Keyword(s):  
Photocatalytic Activity ◽  
Zno Nanoparticles ◽  
Microwave Assisted Synthesis ◽  
Nano Zno ◽  
Effect Of Ph ◽  
Microwave Assisted ◽  
Activity Effect ◽  
Uv Visible

Este estudio reporta una síntesis fácil, libre de surfactantes y asistida por microondas para la producción de nanopartículas de óxido de zinc (ZnO). Se investigó el efecto del valor del pH sobre las propiedades químicas, ópticas, morfológicas y fotocatalíticas de las nanopartículas de ZnO. Las nanopartículas se caracterizaron mediante microscopía electrónica de barrido (SEM), espectroscopía infrarroja por transformada de Fourier (FTIR), espectroscopía de rayos X por dispersión de energía (EDS) y espectroscopía UV-visible (UV-Vis). El análisis SEM muestra que el tamaño de las partículas disminuye con el aumento del valor de pH. Los espectros UV-Vis muestran picos de absorción excitónica alrededor de 334-359 nm. Se encontró que la brecha de energía de las muestras disminuye con el aumento del valor de pH. Finalmente, se evaluó la eficiencia fotocatalítica de los nanomateriales de ZnO mediante la degradación de naranja de metileno (MO) bajo irradiación de luz UV-A y se logró una eficiencia de degradación del colorante del 93.04% para la muestra de ZnO con pH-13. Los resultados experimentales confirman que la ruta propuesta para producir ZnO es fácil, reproducible y amigable con el medio ambiente. Además, el nano ZnO tiene un gran potencial como fotocatalizador para eliminar compuestos orgánicos.

Self-Diffusion in Nano-ZnO

2010 ◽  
Vol 307 ◽  
pp. 27-35
Author(s):  
S.S. Kanmani ◽  
K. Ramachandran
Keyword(s):  
Isotope Effect ◽  
Zno Nanoparticles ◽  
Reaction Coordinate ◽  
Vacancy Mechanism ◽  
Nano Zno ◽  
Self Diffusion ◽  
Jump Frequencies

Self-diffusion, both cationic and anionic, in ZnO nanoparticles was studied here in accord with reaction coordinate theory. The jump frequencies at various temperatures were computed. The isotope effect revealed that self-diffusion occurred mainly via a vacancy mechanism in nano ZnO; a result not previously reported in the literature.

Preparation and Properties Research of Modified Nano-ZnO/HDPE Composite Films

2010 ◽  
Vol 174 ◽  
pp. 450-453 ◽  
Author(s):  
Ya Na Li ◽  
Kyong Ho Cha ◽  
Qing Hui He
Keyword(s):  
Tensile Strength ◽  
Water Vapor ◽  
Zno Nanoparticles ◽  
Composite Films ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Melt Blending ◽  
Molding Process ◽  
Nano Zno ◽  
Modified Zno Nanoparticles

Nanocomposite films of ZnO/HDPE were prepared via melt blending and hot compression molding process. The morphology, DSC, mechanical and barrier properties of the films were investigated. The results showed that a better dispersion of modified nanoparticles at content of 0.5wt% in HDPE matrix occurred and the improvement of the HDPE films in tensile strength and tear strength was achieved by incorporating modified-ZnO nanoparticles up to 0.5wt% in contrast with the original nano-ZnO/HDPE composite films. It was also found that the addition of modified nano-ZnO to neat HDPE caused to increase crystallinity and enhance the barrier property of nano-ZnO/HDPE composite films against water vapor and oxygen.

Green method for producing hierarchically assembled pristine porous ZnO nanoparticles with narrow particle size distribution

2015 ◽  
Vol 151 ◽  
pp. 282-287 ◽  
Author(s):  
A. Escobedo-Morales ◽  
D. Téllez-Flores ◽  
Ma. de Lourdes Ruiz Peralta ◽  
J. Garcia-Serrano ◽  
Ana M. Herrera-González ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Zno Nanoparticles ◽  
Narrow Particle Size Distribution ◽  
Green Method

scholarly journals Barrier Properties and Characterizations of Poly(lactic Acid)/ZnO Nanocomposites

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1310 ◽  
Author(s):  
Zhenya Tang ◽  
Fangling Fan ◽  
Zhuangzhuang Chu ◽  
Chunli Fan ◽  
Yuyue Qin
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Zno Nanoparticles ◽  
Food Packaging ◽  
Ternary Systems ◽  
Poly Lactic Acid ◽  
Vapor Permeability ◽  
Scanning Calorimetry ◽  
Electron Microscopic ◽  
Nano Zno

This study aimed to reinforce the barrier performance (i.e., oxygen–gas and water–vapor permeability) of poly(lactic acid) (PLA)-based films. Acetyltributylcitrate and zinc oxide nanoparticle (nano-ZnO), serving as plasticizer and nanofiller, respectively, were blended into a PLA matrix through a solvent-volatilizing method. The structural, morphological, thermal, and mechanical performances were then studied. Scanning electron microscopic images showed a significant dispersion of nano-ZnO in PLA ternary systems with low nano-ZnO content. The interaction between PLA matrix and ZnO nanoparticles was further analyzed by Fourier-transform infrared spectroscopy. Wide-angle X-ray scattering spectroscopy demonstrated high compatibility between PLA matrix and ZnO nanoparticles. Mechanical property studies revealed good tensile strength and low flexibility. Differential scanning calorimetry curves proved that an amorphous structure mostly existed in PLA ternary systems. The improvements in barrier property and tensile strength indicated that the PLA/nano-ZnO composite films could be used for food packaging application.

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