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Dissolution of cellulose with NMMO by microwave heating
- Doganand, Hacer, Hilmioglu, Nilufer Durmaz
- Carbohydrate polymers 2009 v.75 no.1 pp. 90-94
- cellulose, microwave treatment, heat treatment, crystal structure, polymerization, cellulosic fibers, temperature
- Environmentally friendly microwave heating process was applied to the dissolution of cellulose in N-methylmorpholine-N-oxide (NMMO) with 105-490 W and 2450 MHz microwave energy until the dissolution completed. Microwave heating caused the decrease in the dissolution time and energy consumption. Cellulose/NMMO/water solutions with different cellulose concentrations were converted to the membrane to measure the crystallinity and degree of polymerization. It was shown that microwave heating with the power of 210 W is an alternative heating system for dissolution of cellulose in NMMO. The membranes obtained with two different heating methods showed the same crystallinity and degree of polymerization. As a result, microwave heating has an advantage in shortening reaction times, compared to conventional heating.