APPLICATION OF NANO TECHNOLOGY IN TEXTILE FINISHING SUBMITTED TO: PROF. DEEPTI GUPTA SUBMITTED BY: ANUBHAV SHUKLA (2015TTF2385)

CONTENT NANO-TECHNOLOGY SYNTHESIS OF NANOPHASE MATERIALS NANOFINISHING APPLICATION NANOPARTICLES& ITS APPLICATIONS NEXT GENERATION NANO FINISHING FUTURE ASPECTS CONCLUSION

NANO-TECHNOLOGY We can define it by following means “It deals with structures whose area is smaller than 100 nm at least in one dimension” OR “Nanotechnology greatly focuses on handling, arranging and controlling of nanoscale structures to incorporate into large material structures and components”

SYNTHESIS OF NANOPHASE MATERIALS Top down approach It involves breaking down the bulk materials to nano sizes Bottom up approach Building atom by atom by self assembly

NANOTECHNOLOGY WHY?  Conventional methods used to impart different properties to fabrics Lower sustainability Reduce breathability Comfort  Nanotechnology can provide high durability for fabrics because: Smaller size large surface area-to-volume ratio high surface energy.  Coating of nano-particles on fabrics will not affect their breathability or hand feel.

APPLICATION OF NANOFINISHING FUNCTIONAL water repellent PROTECTION UV absorption DURABILITY color fastness DURABILITY abrasion SAFETY fire retardancy FUNCTIONAL HYGIENE Anti-microbial FUNCTIONAL PROTECTION Controlled release of additives Nano Treated Textile Textile FUNCTIONAL PROTECTION self-cleaning

NANOPARTICLES& ITS APPLICATIONS

WATER REPELLENT FINISHES PREVIOUSLY BY PARAFFIN WAX: Paraffin chains wrap themselves spiral-like around individual fibres, filaments or yarns in a very fine film Reduces surface tension water droplets and even mud with significantly higher surface tension simply run off Economic

WATER REPELLENT NANO FINISH SiO2, Al2O3 nanoparticles are mainly used for super water repellent finishes Fibres are coated with millions of 40 nanometer wide silicone nanofilaments Silicone is condensed into the fibres in the form of gas to form nanofilaments A permanent layer of air, trapped in silicone nanofilaments, that is present in the fabric, prevents the water from penetrating into the cloth

ANTIMICROBIAL NANOFINISH Nano particles have an extremely large relative surface area, thus larger contact with bacteria or fungi It suppresses respiration, the basal metabolism of the electron transfer system, and the transport of the substrate into the microbial cell membrane It adversely affect cellular metabolism and inhibit cell growth Nanosized silver, titanium dioxide and zinc oxide are used

CONT… Encapsulate a silver compound or nano particle with a fibre reactive polymer Silver nanoparticles are on the surface of the capsule In inner core perfume or thermo sensitive material Anti-microbial activity against various bacteria, fungi are achieved

DISADVANTAGE UF USING SILVER NPs High cost Incompatibility to aqueous system Tendency to cause decoloration in textile Loss in tensile sttength and elongation both L. Maleknia, A. S. Rashidi, “Preparation and Characterization of Nylon 6/Silver anocomposite Fibers for Permanent Antibacterial Effect”, Oriental Journal of Chemistry Vol 31;(2014);

PHOTOCATALYTIC SELFCLEANING FINISH

UVPROTECTION FINISH By TiO2, ZnO, SiO2 and Al2O3 nanoparticles Scattering is inversely proportional to the wavelength to the fourth power Light scattering predominates at approximately onetenth of the wavelength of the scattered light

LIMITATIONS Generation of waste chemical residues or wastewater during the production of self-cleaning fibrous materials Improper disposal of nanomaterials could lead to a large amount of nano-sized titanium dioxide entering the soil Earthworms can absorb nanoparticles from the contaminated soil and move up to the food chain Nano Tio2 induces oxidative DNA damage increases DNA strand breaks

NEXT GENERATION NANO FINISHING

NANOCARE Uses whishker like structure Features Superior Stain, Water and Oil Repellency Resists Wrinkles Breathable Fabric Preserves Original Hand Easy Care Dimension stabilizing finish Hooks Whiskers

SUPER HYDROPHOBIC: SELF CLEANING NANO FINISHES Billions of Nanowhiskers create a thin cushion of air above the cotton fabric, smoothing out wrinkles and allowing liquids to bead up and roll off without a trace. Water droplets form spherical globules Rough nanoscale surface picks up dirt Water and dirt roll off It doesn't affect the hand, breathability of fabric

NANO DRY USES NANONET STRUCTURE Hydrophilic finishing technology Nanonets alters the property of synthetic fibers like Polyester to give feel of cotton & linen. Wicks body moisture fast Dries quickly & gives cooling effect. Preserves Original Hand Durable Performance

NANO TOUCH Nano sheet wraps the fiber completely to cover it & alter its property. Strength and Durability. Improvement in colorfastness. Crease retention. Static resistance. Superior Refinement in a blended Fabric Luxurious Cotton like hand

FUTURE PROSPECT Future developments of nanotechnologies in textiles will have a two fold focus: Upgrading existing functions and performances of textile materials; Developing multifunctional finishes using nano technology The new functions with textiles to be developed include Nanofibres that would detoxify and filter toxic chemicals, warfare agents. Multiple and sophisticated protection and detection. Healthcare and wound healing functions

CONCLUSION Nanotechnology takes finishing to an advance level by covering demerits of conventional finishes Nano finish impart some valuable property to fabric but may have some disadvantage in terms of strength loss, toxicity. To overcome these barrier the research on nanofinish need to expand in direction of sustainable, ecofriendly nanofinish

REFERENCES S.Kathirvelu,“Nanotechnology applications in textiles”, Indian Journal of Science and Technology;Vol.1(2008);Pg.1-10 A. Ebissy,“Effect of nano ZnO on structural characteristic, tensile thermal properties of textile fabrics”,Journal of industrial textiles;(2015);Pg.1-13 Wing Sze Tung,“Self-cleaning fibers via nanotechnology: a virtual reality”, Journal of Materials Chemistry; Vol.21; (2011); Pg.7858–7869 Mehreen Ijaz,“Role of Nanotechnology in the Field of Textile Finishes”, RJSSM;Vol.03;(2013);Pg M. Joshi and A. Bhattacharyya Nanotechnology,“A New Route to High Performance and Functional Textiles”,Textile Progress;(2011) ; Pg Mohammad Mirjalili,“Antibacterial properties of nano silver finish cellulose fabric”,Journal Of Nanostructure in Chemistry; (2013); Pg.1-5 D. Gopalakrishnan,“Functional Nano Finishes ForTextiles”, Fibre2Fashion;2016;Pg.1-10 A.P.S.Sawhney,“Modern Applications of Nanotechnology in Textiles”, Textile Research Journal;Vol 78;2008;Pg

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