FASH 250 Lecture Notes - Angora Goat, Spider Silk, Cashmere Goat
Document Summary
Fash 290 classes # 5&6 boardnotes: natural protein fibers (wool, specialty wools, silk) chapter 5 table: 5-1. Natural protein fibers are of animal origin: wool specialty wools (hair & fur of animals), & silk (secretion of silk caterpillar). Silk and wool differ in chemical composition & physical structure but both are protein fibers. Protein wool is keratin, while protein silk is fibroin. Wool molecule is bulkier & less compact than the silk molecule. Keratin: wool (protein found in fingernails, horns, hooves, human hair. Hygroscopic: (all protein fibers share this) absorb moisture without feeling wet. Protein fibers have various amino acids: that have been formed in nature into polypeptide chains w/high molecular weigths, containing carbon (c), hydrogen (h), oxygen (o), & nitrogen (n). they are amphoteric =have both acidic/basic reactive groups. Complex fiber: we have shared chemistry w/wool so we can be allergic to it.