Synthesis and characterization of a new cellulose ether derivative: sodium levulinate cellulose
Synthesis and characterization of a new cellulose ether derivative: sodium levulinate cellulose
Ananda S. Amarasekara(Prairie View A&M University); Lauren J. Leday(Prairie View A&M University); Deping Wang(Prairie View A&M University); Cristian D. Gutierrez Reyes(Texas Tech University)
31권 10호, 941~948쪽
초록
Sodium levulinate cellulose (SLC) was prepared as a new longer carbon chain analog for carboxymethyl cellulose (CMC) in 66–94% yield using the Williamson ether synthesis reaction between sodium hydroxide treated cellulose and brominated levulinic acid in aqueous iso-propanol medium under thermal and microwave conditions. Levulinate cellulose ether produced was characterized by FT-IR, TG–DTA, X-ray and proton NMR. The thermal reactions carried out at 90 °C for 3 and 24 h gave SLC products with degrees of substitutions of 0.48 and 0.86, respectively, whereas the microwave synthesis product showed a degree of substitution of 0.32 as determined by ASTM D1439-03 method used for CMC.
Abstract
Sodium levulinate cellulose (SLC) was prepared as a new longer carbon chain analog for carboxymethyl cellulose (CMC) in 66–94% yield using the Williamson ether synthesis reaction between sodium hydroxide treated cellulose and brominated levulinic acid in aqueous iso-propanol medium under thermal and microwave conditions. Levulinate cellulose ether produced was characterized by FT-IR, TG–DTA, X-ray and proton NMR. The thermal reactions carried out at 90 °C for 3 and 24 h gave SLC products with degrees of substitutions of 0.48 and 0.86, respectively, whereas the microwave synthesis product showed a degree of substitution of 0.32 as determined by ASTM D1439-03 method used for CMC.
- 발행기관:
- 한국고분자학회
- 분류:
- 고분자공학