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

Explore the intricacies of textile fibers through microanalysis in the lab, learn about equipment and sample preparation techniques, and delve into the world of fabric structure. Discover the impact of polishing on sample clarity and the importance of using appropriate cloths for different materials. Witness ESEM images of various textiles and materials. Acknowledgments to the contributors and organizations involved in this educational experience.

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

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  1. The Power of WeaveAnalyzing Fibers of Textilesin the Microanalysis Lab Mentor: Mr. Robert E. Goddard Teachers: Mrs. Susan Goracke Mrs. Jessica Peddie

  2. Field Trip to the Textile Lab at FSU Equipment used to conduct a variety of tests on different fabric

  3. Our Primary EquipmentThe Environmental Scanning Electron Microscope (ESEM)

  4. In order to clearly view metal items on the ESEM, samples need to be polished to a mirror finish. If this doesn’t happen, the structure of the sample won’t be revealed. Just like looking in a scratched mirror gives a distorted image, scratched samples make it difficult to analyze the structure. Magnification 200x

  5. Options For Sample Preparation Grind/Polish Vibratory Polish

  6. A medium (cloth fabric such as a Q-tip or woven fabric) is needed to apply a polishing compound—such 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.

  7. 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

  8. silicon carbide paper ← diamondgrinding disc ←

  9. 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

  10. More Polishing Cloths Short nap synthetic ~12 • Neoprene~1.5-1.8 pores

  11. Teflon, Kevlar and Xylon are used in magnet design. Xylon with epoxy forms a composite material that can expand. This keeps “eruptions” localized.

  12. Other ESEM Images Microfiber 70/30% polyester polyamide Cotton Gore-Tex

  13. A Comparison of Materials on the ESEM

  14. 3-D GLASSES ON NOW! (Red over left eye)

  15. Cloth (cotton) Diaper 100x

  16. Polyester/Cotton Shirt

  17. Woven Wool Polishing Cloth

  18. 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

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