The Power of Weave Analyzing Fibers of Textiles in the Microanalysis Lab

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The Power of WeaveAnalyzing Fibers of
Textilesin the Microanalysis Lab

• Mentor Mr. Robert E. Goddard
• Teachers Mrs. Susan Goracke
• Mrs. Jessica Peddie

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Field Trip to the Textile Lab at FSU
Equipment used to conduct a variety of tests on
different fabric
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Our Primary EquipmentThe Environmental Scanning
Electron Microscope (ESEM)
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In order to clearly view metal items on the ESEM,
samples need to be polished to a mirror finish.
If this doesnt happen, the structure of the
sample wont be revealed. Just like looking in a
scratched mirror gives a distorted image,
scratched samples make it difficult to analyze
the structure.
Magnification 200x
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Options For Sample Preparation

• Grind/Polish

• Vibratory Polish

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A medium (cloth fabric such as a Q-tip or woven
fabric) is needed to apply a polishing
compoundsuch as diamonds. Sandpaper scratches
out a groove causing a stress in the material
that can be as deep as the groove itself. A
section deeper than the groove itself must be
taken off.
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Preparing Samples for Viewing
Fine grinding (with 5 µm sandpaper) disturbs the
sample as deep as 70 µm. Rough polishing (using 3
µm diamonds) disturbs the sample as deep as 15
µm. Final polishing (etch sample with base or
acid ) disturbs less than 4 µm
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silicon carbide paper ? diamondgrinding
disc ?
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Different cloths are used for different pressures
and different metals. For example, copper is a
softer metal. A softer material with space
between fibers acts as a springboard for the
diamonds. On the other hand, Titanium is only
slightly softer than diamonds and requires a much
sturdier cloth.
Rayon 14-16 µm
Synthetic 8-12 µm
Wool 8 µm
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More Polishing Cloths

• Neoprene1.5-1.8 pores

Short nap synthetic 12
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Teflon, Kevlar and Xylon are used in magnet
design. Xylon with epoxy forms a composite
material that can expand. This keeps eruptions
localized.
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Other ESEM Images
Microfiber 70/30 polyester polyamide
Cotton
Gore-Tex
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A Comparison of Materials on the ESEM
Item Materials) Width of fibers in um
bathrobe silk 8.21-13.62
hosiery nylon 17.84-18.68
Cloth Diaper Cotton 20
T-Shirt 60 Cotton 40 poly. Knit 9 13-16
Shirt 65 Polyester 35 Cotton 10
T-Shirt 100micro poly-outer 100 Cotton-inner 10.512
ultra-mirofiber cloth 80 polyester/20 polyamide 8.48
Eurocloth microfiber 70polyester/30 polyamide 6
parachute nylon 19-21
Gore-tex sealant Gore-tex 1.5-2
Bullet-proof vest Kevlar 10
DP-Plan Polishing Woven Synthetic 8-12
DP-Mol Polishing Wool Woven 15-20
MD-Mol Wool Woven 8
DP-Micro Cloth Rayon on Cotton 14-16
MD-Chem Cloth Neoprene pores 1.5-1.8
DP/OP Nap Short nap-synthetic 11.9-12.3
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3-D GLASSES ON NOW!
(Red over left eye)
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Cloth (cotton) Diaper 100x
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Polyester/Cotton Shirt
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Woven Wool Polishing Cloth
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We would like to thank the following.

• The National High Magnetic Field Laboratory
• National Science Foundation
• Mr. Robert E. Goddard
• Captain Kelly Burke, Tallahassee Police Dept.
• Dr. Rinn Cloud, FSU Textiles Dept.
• Dr. Pat Dixon, Ms. Gina LaFrazza-Hickey, and
  other staff at the Center for Integrating
  Research and Learning