Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 10/24/2011
Publication Date: 2/15/2011
Citation: Cheng, H.N., Biswas, A. 2011. Chemical modifications of renewable cellulosic materials (abstracts). 241st American Chemical Society National Meeting. Paper No. CELL 184.
Technical Abstract: In agriculture, there is a fair amount of byproducts and waste materials. These materials typically contain significant portions of cellulose and hemicellulose. A good opportunity is to take advantage of these relatively cheap renewable materials, carry out chemical reactions, and increase their value. An overview will be given in this presentation, showing several possible reactions. A particular example is given of the use of cotton burr and cottonseed hull, which are byproducts of the cotton process. They contain 28-34% cellulose, 6-25% hemicellulose, 17-21% lignin, and lesser amounts of protein and oil. These cotton byproducts can swell in aqueous NaOH-isopropanol solutions at high pH, in which state they become susceptible to reaction with sodium monochloroacetate. Part of these cotton byproducts can be converted into soluble products, consisting mostly of carboxymethyl xylan and carboxymethyl cellulose. These materials are soluble in water and form films when dried. NMR has been used to characterize these materials.