application of nanotechnology in fabric finishing

8/19/2019 Application of Nanotechnology in Fabric Finishing

http://slidepdf.com/reader/full/application-of-nanotechnology-in-fabric-finishing 1/5

Application of Nanotechnology in Fabric

Finishing

Nanotechnology - is considered one of the most promising technologies for the 21stcentury. It is an emerging interdisciplinary technology that has been booming in manyareas. It has the potential to improve the effectiveness of a number of existing consumer

and industrial products and is expected to have a substantial impact on the development

of new applications. The wave of nanotechnology has shown a huge potential in the

textile and clothing industry which is normally very traditional. The future success of nanotechnology in textile applications lies in areas where new functionalities are

combined into durable, multifunctional textile systems without compromising the

inherent favorable textile properties, including process-ability, flexibility, wash-abilityand softness.

The use of nanotechnology - in fabric finishing has increased rapidly due to its unique properties of applications. The present status of nanotechnology which is using in fabric

finishing is reviewed, with an emphasis on improving the properties of textile materials.ue to immense economical potentiality and unique properties of nano materials,

nanotechnology has attracted both the economical and scientists concern.

!anotechnology is increasingly attracting worldwide attention, because it is widely perceived as offering huge potential in worldwide range of end uses.

1. "# $iltration textiles

2. %otus effect

&. $lame retardant finishes

!eed for "# protection

irect exposure to "#-' energy attac(s the !) of bacteria and other microorganisms.

This energy starts a photochemical reaction that damages the !), destroying the

genetic information contained therein. )s a result, the organisms lose their reproductivecapacity and are destroyed.

"# protection

1. To protect against incident "# radiation by absorbing the "# rays

2. "sable nanoparticles are* Tio2,+n,i2,)l2&

&. In order to scatter "# radiation be 2nm to / nm, the optimum si0e of thenanoparticles should be 2-/nm.

/. "# bloc(ing for the cotton fabric developed by ol-el method

. ) thin layer of Tio2 nanoparticles were formed in the treated cotton fabric to provide excellent "# protection.

3y )ndrian 4i5ayono 6 Textile 7ngineering, TTTe(stil, 3andung, Indonesia



"#

protection

8hoto catalytic activity

1. Titanium dioxide, +inc oxide are photo catalyst9 once they are illuminated by

light with energy higher than its band gaps, the electrons in +n,Ti2 will 5umpfrom the valence band to the conduction band, and the electron :e-; and electric

hole :h<; pairs will form on the surface of the photo catalyst.

2. The negative electrons and oxygen will combine into 2-9 the positive electric

holes and water will generate hydroxyl radicals.

&. ince both are unstable chemical substances, when the organic compound falls onthe surface of the photo catalyst it will combine with 2 = and >- respectively,

and turn into carbon dioxide :'2; and water :>2;./. This cascade reaction is called ?oxidation-reduction@ .


http://www.textilehelpline.com/wp-content/uploads/2013/10/Need-for-uv-protection.jpg



8hoto catalytic activity

unscreen activity

1. "# impact vary between places as it will be absorbed, reflected bec( by clouds,

ad filtering activity of o0one layer.

2. "#-' and most of the "#-3 are filtered by o0one layer

7valuation of uv filteration

• "ntreated fabrics were tested in "#- #is pectroscopy- no specific absorbancefound

• "ntreated polyester fibres shows absorbance in the range of 2nm to &nm

• Treated fabric samples absorbs the entire spectrum

• "8$ :"# production factor; were assessed for the fabric samples

elf cleaning

• Aust imagine washing of our cloths while wal(ing in the rain

• !o laundry, no dry cleaning

• ) little water from s(iesB spray could be able to remove the stain in the fabric

• ) close loo( of lotus leaf provides a clue how it is being hydrophobic


http://www.textilehelpline.com/wp-content/uploads/2013/10/Photo-catalytic-activity.jpg



elf cleaning

$lame retardant finishes

• )sbestos fibers has been used by ancient romans

• In 1C&, 4yld recorded a patent of fire retardant finishing of cellulosic materials

using aluminium, ferrous and borax

• )lmost a century later, in1D21,%ussac published perhaps the first systematic

study of the use of flame retardants :$E;.

• These ideas laid the foundation for the early theories of flame retardancy of

textiles

Fechanisms of flame retardant finishing

• 'ondensed phase removal mechanisms

• Through fibre insulation

• Eemoval of heat from the fibre

• 'rosslin(ing and dehydration of the polymer to produce 'o2, >2o, 'har .

• as phase flame fighting methods

• The flame is controlled by slowing down B bloc(ing the pyrolysis

•

The flame actually consumes less fuel and generates less heat as the amount of vapor-phase flame retardant is increased.

• This decreases the amount of heat returned bac( to the polymer substrate and

slows or halts pyrolysis.

Eole of !ano

• !anoparticle coating of Tio2 investigated for durable finishing of the flame

retardant textiles.

• !anometer-si0e Ti2 particles may exhibit many special features due to the fact

that the band gap :the distance between the valence band and conduction electron

band; increases with the decrease of their si0e. )lso, small Ti2 particles offer

very large active surface area.• Eesearch has shown that the vast ma5ority of studies of Ti2 antimicrobials are

conducted in solution using suspensions or thin films.

• !anosols of ceramic components shows wear resistance property and applied

abrasion stability

• Improved abrasion resistance will result in durability of antyhing coated over the

textile surface.


http://www.textilehelpline.com/wp-content/uploads/2013/10/Self-cleaning.jpg



Tio2 !anoparticle as coating

• !ano scale Ti2 can greatly impact the anti aging property of the flame retardant

finish by bloc(ing the "# and absorbing

• )lso it could form an interpenetrating layer on the surface to enhance the

resitance of coating to moisture .

• )dsorption and absorption of the water will harm the flame retardant finishing• ols of i2 and Ti2 can be used to resist the heat upto &G '.

• 4hen the Ti2 is exposed to flame, it can form the ceramic li(e materials to

protect the substrate during the combustion process.

• It can also limit the oxygen diffusion to the coated substrate there by destroying

the fire triangle.

)nti-microbial !ano textiles in fabric finishing*

It is a well-(nown fact that the growth of bacteria and microorganisms in food or water is

prevented when stored in silver vessels due to its antibacterial properties. The anti-

bacterial properties of silver are now scientifically recogni0ed. ilver ions have broadspectrum of anti microbial activities. The method of producing durable silver containing

antimicrobial finish is to encapsulate silver compound or nano particle with a fibre

reactive polymer li(e poly :styrene co-maleic anhydride;

Eeferences*

1. !anofibers and !anotechnology in Textiles , 7dited by 8. A. 3rown and H.

tevens

2. Fodern )pplications f !anotechnology in Textile $inishing, ).8.. awhney, 3.'ondon, H.#. ingh, .. 8ang, . %i and avid >ui

&. http*BBtextilelearner.blogspot.comB21&B/Bapplication-of-nanotechnology-in.html/. !ano finishing of textiles -11C1&Jbhpapp2

. http*BBwww.slideshare.netBsandeepmittalJ2Bnano-finishing-of-textilesJ. !ano technology-application

C. http*BBwww.scribd.comBdocB2J//B!anotechnology-)pplications-in-Textiles

D. Textile !anotechnology by 3)%)"3E)F)!I)F.!


http://textilelearner.blogspot.com/2013/04/application-of-nanotechnology-in.html

http://textilelearner.blogspot.com/2013/04/application-of-nanotechnology-in.html

application of nanotechnology in fabric finishing

Documents