HECOL476 Lecture Notes - Lecture 7: Hydrolysis, Photodegradation, Sericin

• School: University of Alberta
• Department: Human Ecology
• Course: HECOL476
• Professor: Jane Batcheller

Document Summary

Lecture 7 & 8: chemical degradation ph is spoken of when you want to determine how basic or acidic a solution is. Refers to the hydrogen ion concentration in a solution [h+] mol/l. Some water molecules will dissociate from h2o to h3o+ or to oh- Water itself is neutral with a ph of 7. Need to be able to recognize cellulose structure, change to a cellulose molecule. When an acid attacks a textile, it will enter the amorphous regions rst. This is where acid hydrolysis will occur rst. Acid hydrolysis = breaking with water, under acidic conditions. Chain splits apart, and a termination of oh occurs on either end. Once this occurs, the acid may spread to the crystalline areas. The number of available sites accessible to acid migration. As temperature rises, gives energy to the reaction. If the cellulose is already broken down or altered, it is more sensitive to acid degradation.