HECOL170 Lecture Notes - Lecture 3: Dry Cleaning, Chemical Polarity, Hydrogen Bond
13 Jul 2018
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Document Summary
Seed hair fibres: have more similar properties to one another to other ones. shorter, softer, have ner diameter, bres that grow in the seed pod on plants cotton kapok milkweed. Bast fibres: brous bundles in the inner bark (or bast) of the stems of some plants, cant necessarily see the bre, have to rot away the bark and then extract the bre from within. Leaf fibres: bres which run lengthwise through the leaves of certain plants abaca sisal. Natural cellulosic bres: cellulose is the basic building block of all plant structures, properties of cellulose attributed to: Af nity for water: two glucose molecules, the chemical reactivity is related to the hydroxyl groups. Hydroxyl groups react with moisture, dyes, many nishes. Shape of cellulose molecule a strong, at, thin, long molecule can pack into organized crystalline regions all cellulose bres contain carbon (c), hydrogen (h), and oxygen (o)
