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Nanofibers: Current Status and Role on Future of Technical Textiles

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Future of Nanotechnology for Textiles in Indian Context Availability of Science and Technology Product Development Value Addition Marketing Approach Domestic and ... – PowerPoint PPT presentation

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Title: Nanofibers: Current Status and Role on Future of Technical Textiles


1
Nanofibers Current Status and Role on Future of
Technical Textiles
Gajanan Bhat Professor MSE Director,
UTNRL University of Tennessee, Knoxville, TN,
USA gbhat_at_utk.edu
TECHNOTEX 2011, Mumbai, India August 26, 2011
2
Nanotechnology
  • The science, engineering and technology related
    to the understanding and control of matter at the
    scale length of approximately 1 to 100
    nanometers. However, nanotechnology is not merely
    working with matter at the nanoscale, but also
    research and development of materials, devices
    and systems that have novel properties and
    functions due to their nanoscale dimensions and
    components

The National Nanotechnology initiative at Five
years Assessment and Recommendations of the
National Nanotechnology Advisory Panel,
Presidents Council of Advisors on Science and
Technology, Washington, DC, May 2005, p7.
3
Nanotechnology
  • Has not reached the state of application that
    draws public interest
  • Can be a big investment - a lot at stake
  • Lot of research and developmental activity in
    this area
  • In general technology lags behind science
  • Textiles technology may be ahead of science

4
Nanotechnology
  • Relevance to Textiles
  • Nanofibers
  • Coating
  • Finishing
  • Modification
  • Characterization

5
Nanofibers
  • Diameter
  • High specific surface area
  • Higher filtration efficiency

6
Nanofiber Research Publications
7
Cotton Structure Nanofibers?
8
Wool Structure Nanofibers?
9
Production Techniques for Nanofibers
  • Splitting (IS)
  • Drawing
  • Electrospinning
  • Forcespinning
  • Modified Melt Blowing (MB)

10
Production Techniques for Nanofibers
  • Splitting of bi-/multi-component fibers
  • From multicomponent spinning and dissolution of
    some components
  • Hard to precisely control the fiber dimensions
  • Solvent

11
Electrospinning Process
  • Simple process at lab scale
  • Fine fibers possible
  • Scalability
  • Solvents
  • Dielectric requirements
  • Not suitable for PP

12
Forcespinning Fiberrio
  • By using Centrifugal Force
  • Both solutions and Melts
  • No high voltage, no hot air
  • New Process many unknowns

13
Melt Blowing Process
  • Fiber Diameter (2-5 µ)
  • Air permeability/Hydrohead
  • Filtration efficiency
  • Porosity, pore size Distribution
  • Mechanical Properties
  • Composite structures
  • Suitable for any thermoplastic polymer No
    solvents

14
Nanofiber Melt Blowing
  • Figure 6 Nanofiber Melt Blowing

15
Nanofiber Melt Blowing
  • Modular Dies
  • AGR/NTI
  • Hills


16
Melt Blown Nanofibers
17
Melt Blown Nanofibers
18
20-inch Meltblowing Line
19
Melt blown Nano and Sub-Micron Fibers
20
(No Transcript)
21
Where are We?
  • Consistently produce NF MB webs from several
    thermoplastic polymers
  • Narrow fiber diameter distribution
  • Optimize Processing Conditions
  • Understand the Morphology Development
  • Evaluating Composite Structures

22
Applications of Melt Blown Nanofibers
23
Applications of Melt Blown Nanofibers
  • Scaffolds
  • Controlled Rate of Drug Delivery
  • Tissue engineering
  • Wound dressing

24
Applications of Melt Blown Nanofibers
  • Detoxification/Decontamination,
  • Enhanced reactivity of the Catalysts, Biocides,
  • Enhanced oxidative/
  • hydrolyzing activity
  • of Catalysts (nano
  • MgO, ?-Cyclodextrin), biocides
    (N-Halamines),
    have against
    wide spectrum of
    of CBWA Polymer
  • nanofiber membrane
  • to capture chemical agents

25
Applications of Melt Blown Nanofibers
  • Figure 10 Functionalized nanofibers for
    protective clothing

26
Applications of Melt Blown Nanofibers
  • Nanocomposites

  • Oil Adsorbents
  • Accidental oil spills
  • Fuel cell membranes, battery and fuel cell
    separators, catalysis

27
Applications of Melt Blown Nanofibers
  • Filtration Media
  • Lower pressure drop
  • Higher permeability
  • Higher particle capture efficiency
  • Quality factor
  • Air water purification filters, chemical
    filtration, HEPA filtration devices, face masks,
    filters for furnace

28
Applications of Melt Blown Nanofibers
29
Nanofiber Arrays Dramatically Boost Battery
Energy Storage New method allows a dramatic boost
in capacity for a given weight
http//www.nano.org.uk/news/1571/
30
Future Prospects of Melt Blown Nanofibers
  • Future Prospects
  • The global market should reach 176 million in
    2012 and grow to 825 million by 2017
  • 1 trillion are market in textile
  • 100 billion market in electronic packaging
  • Scaffolds for the 10 billion tissue engineering
    by 2020
  • The mechanical/chemical sector is projected to
    account for 73.5 of total revenues in 2007

31
Nanofiber Market Projection BCC Research
32
Nanotechnology for Textiles
  • Nanocomposite fibers
  • CNT and nanoclay
  • Finishes
  • Water repellency
  • UV protection
  • Antibacterial
  • Wrinkle resistance
  • Reactivity
  • Functionality without sacrificing physical
    properties

33
Nanotechnology for Textiles BASF
34
Nanoparticle Application on Textiles
  • Continuous Spraying system
  • Sonication to achieve dispersion of nanoparticles
  • Uniform application on nonwovens and other
    textiles

35
Other Nonwoven Related Research Projects at UTNRL
  • Nanoparticle Reinforced Fibers, Webs and Films
    (Corp)
  • Nanoparticle Reinforced Composites (ONR)
  • Thermal Bonding Fundamentals
  • Melt Blowing Processing, Polymers and
    Fundamentals
  • Nanofiber Composites
  • Biodegradable Nonwovens Composites
  • Coating of textiles, webs and films
  • Multifunctional Composites (NASA)
  • Flame Retardant Nonwovens (USDA Cotton Inc.)
  • High Temperature Polymeric Fibers (Corp)
  • Fiber Formation Fundamentals (corp)
  • Other Proprietary work Various companies.

36
Future of Nanotechnology for Textiles in Indian
Context
  • Availability of Science and Technology
  • Product Development
  • Value Addition
  • Marketing
  • Approach
  • Domestic and Global
  • Creativity and Engineering will lead to
    tremendous growth
  • where do you want to be?

37
Thank You
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