DESIGN AND ANALYSIS OF ZINC OXIDE NANOPARTICLES USING

FIBER REINFORCED COMPOSITES

Presented By :

Sai Likitha Siddanathi

Rama Vinay Wairagkar

Sathyabama university,chennai

INTRODUCTION

ZnO nanoparticlesProperties of ZnOSynthesis process of ZnOTestingFabrication processLamination processApplications of ZnOResult

PROPERTIES OF ZINC OXIDECHEMICAL PROPERTIES Reaction with acidsZnO + 2 HCl → ZnCl2 + H2O

Reaction with basesZnO + 2 NaOH + H2O → Na2[Zn(OH)4]

Obtaining the Zn metalZnO + C → Zn + CO

PHYSICAL PROPERTIES The 2 main crystallization forms ZnO are horizontal wurtzite

and cubic zinc blend. Zinc and oxide centers are tetrahedral.

MECHANICAL PROPERTIES Properties are good for ceramics. Zn has highest piezo electric tensors.

ELECTRICAL PROPERTIES ZnO has the ability to sustain large electric field, electronic

noise, high temperature and high power operation.

SYNTHESIS PROCESS OF ZnO WET CHEMICAL PROCESS• ZnO is prepared using Zn nitrate, sodium hydroxide precursors

and soluble starch.• 0.1% of soluble starch is dissolved in 500ml of distilled water

then 0.1mol of Zn nitrate is added to the solution.• After dissolving Zn nitrate,0.2mol of NaOH is added to the

solution by constant stirring.• The reaction takes place in 2hrs and the solution is left for the

whole night and supernatant solution is discarded carefully.• The obtained nanoparticles are washed thrice using distilled

water to remove the byproducts.

ZINC NANO POWDER

TESTINGX-RAY DIFFRACTION METHOD X-ray diffraction method is a versatile non destructive method which

occurs in wave form i.e. distance of penetration is equal to wavelength. For certain geometries X-ray’s get scattered from crystalline solids and

produce a diffracted beam, according to bragg’s equation, nλ=2dsinθ, Where,

λ-wavelength of x-ray

d- interplaner spacing

θ-diffraction angle

n-0,1,2,3…. X-ray diffraction is recorded from 20˚ to 90˚,with accelerating voltage

of 40KV. The analysing is done by scherres formula,

P = 0 . 9 λ

β cos θ

Where,

p-crystallite size

 λ –wave length(1.54A)

β –full maxima half width

θ –diffraction angle

SCANNING ELECTRON MICROSCOPE

SEM uses high energy electrons to generate variety of signals on the surface of solid structures.

A certain area is selected and 2-d image is generated which gives spatial variations.

This is used to determine quantitative and semi quantitative chemical composition of the crystalline structure.

SEM SEM OF ZnO

FABRICATION PROCESS

TYPES OF MOULDING

CLOSE MOULDING PROCESS

OPEN MOULDING PROCESS

VACUUM BAG

MOULDING

RESIN TRANSFER MOULDING

SPRAY LAY UP

HAY LAY UP

DESIGN OF LAMINATE ANALYSIS MECHANICAL TERMINOLOGY

APPLICATIONS OF ZINC OXIDE COMPOSITESZno is mainly used to apply over fibers mixed with resins to improve

mechanical properties of composites.

It also protect the composite from UV light.

COATINGUsed as anticorrosive agents for coating metals. Main application is

galvanizing iron. They also retain flexibility of iron.

ELECTRONIC APPLICATIONSZnO has wide band gap due to which its application includes in leser

diodes and light emitting diodes. They have strong enhabcement of electric fields due to pointed tips.

RESULTS IMPACT TESTThe laminate with and without Nano particles is cut into different sizes in

order to undergo Impact testing.

% increase for sample-1 is 22.72%

%increase for sample-2 is 19.04%

SAMPLES NORMAL COMPOSITES

NANO COMPOSITES

SAMPLE-1 2.2J 2.7J

SAMPLE-2 2.1J 2.5J

NORMAL COMPOSITE AFTER TESTING

NANO COMPOSITE AFTER TESTING

CONCLUSIONNano composites differ from conventional composite

materials due to their exceptionally high surface to volume ratio and their high aspect ratio as a result; products of nanotechnology are more

reactive than microtechnology.

In this presentation the ZnO nanoparticles are synthesied and subjected to SEM test to determine

their size.

These nanoparticles are implemented in kevlar /glass epoxy laminate. Impact strength, failure strengths of nano composite is determined and compared with kevlar /glass epoxy laminate without nano

particles.