Chapter 10 Wool Fibers Yiping Qiu Donghua university
Chapter 10 Wool Fibers Yiping Qiu Donghua University
Morphology A FIGURE 10.2Photomicro graph of wool fiber showing the surface scales overlapping toward the tip of the fiber and an oval cross-section 50μm(eft H 10 um(right)
Morphology
Structures of wool fibers 口 Submicrostructure Cotex core of the wool fiber >90% of the fiber volume consists of countless long, spindle-shaped cells held together by intercellular cement
Structures of wool fibers ❑Submicrostructure – Cotex ➢ core of the wool fiber: ➢ 90% of the fiber volume, ➢ consists of countless long, spindle-shaped cells held together by intercellular cement
Wool fibers under polarized optical microscope
Wool fibers under polarized optical microscope
Structures of wool fibers 口 Submicrostructure Cotex can be divided into 2 sections Orthocotex containing less cystine, and thus less s-s b onas Paracortex containing more cystine, absorbing less water two sections spiral around each other along the fiber length the two sections respond to heat and moisture differently forming 3-D crimp
Structures of wool fibers ❑Submicrostructure – Cotex ➢ can be divided into 2 sections: – Orthocotex containing less cystine, and thus less S-S bonds – Paracortex containing more cystine, absorbing less water. – two sections spiral around each other along the fiber length. – the two sections respond to heat and moisture differently forming 3-D crimp