Chemistry and Applications of Nanocrystalline Cellulose and Its Derivatives: A nanotechnology perspective

J Cai, L Zhang, E Cowling, K Gardner, J Blackwell, D Klemm, H.-P Fink
2016 Cellulose: Fascinating Biopolymer and Sustainable Raw Journal of Engineering   unpublished
This study focuses for improving the increase the solubility of fiber cellulose in sodium hydroxide solution in concentrations ranging from (4-12%), from one point of view and from other point of view in (sodium hydroxide and urea) solution concentration (6% NaOH + 4% urea), under low temperature (-15,-20 C o) , depending on the principle of reducing the degree of polymerization for fiber cellulose, which is represented in our tests cotton linter who its represent (Whatman filter paper, Grade
more » ... lter paper, Grade 1), some samples subjected to chemical pretreatment as simulation the method of decomposition of cellulosic materials by white or brown fungi that grow on trees, this method involves the use of chemical materials, including hydrogen peroxide (H 2 O 2) , oxalic acid C 2 H 2 O 4 and ferrous sulfate FeSO 4 to be reaction known (Fenton reaction or Fenton's reagent) which produce free radicals helps the decomposition of cellulose fibers. The results were as follows: The solubility of cellulose fiber in sodium hydroxide solution was up to 42% cellulose and the best sodium hydroxide concentration is 8% for treated simples in Fenton solution and for untreated simples were the best solubility of cellulose fiber up to 28% and the best temperature is-20 C o for both. For the solubility of cellulose fibers in sodium hydroxide and urea solution (6% NaOH + 4% urea) was more than 60% of treated cellulose in Fenton reaction , while for untreated cellulose was the best solubility ratio up to 35% and it was the best temperature-15 C o