By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Nanocrystals are presented in a new report. According to news reporting originating from Beijing, People's Republic of China, by NewsRx correspondents, research stated, "Cellulose nanocrystals (CNCs) have drawn tremendous attention because of their extraordinary physical and chemical properties as well as renewability and sustainability. In this work, after a range of pretreatments, such as freeze-drying, ball-milling, mercerization, N-methylmorpholine-N-oxide dissolution and ionic liquid dissolution, various CNCs with different crystalline properties and morphologies were obtained by hydrolysis or oxidation."
Our news editors obtained a quote from the research from Beijing Forestry University, "XRD and AFM were used to determine the influences of pretreatments on the crystalline properties and morphologies of CNCs. New methods, i.e., specific pretreatments followed by sulfuric acid hydrolysis or 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation, were developed to obtain sphere-like CNCs. It was found that sphere-like CNCs were more likely to be obtained from cellulose materials possessing high accessibility. Pretreatments produced cellulose with various crystallinities and polymorphs, and therefore changed the yields of CNCs and influenced their morphology. CNCs prepared by TEMPO oxidation generally had smaller size than the corresponding products obtained by sulfuric acid hydrolysis."
According to the news editors, the research concluded: "In addition, for the dissolved/regenerated cellulose, TEMPO oxidation was a better method to yield sphere-like CNCs than sulfuric acid hydrolysis."
For more information on this research see: Effects of pretreatments on crystalline properties and morphology of cellulose nanocrystals. Cellulose, 2013;20(5):2427-2437. Cellulose can be contacted at: Springer, Van Godewijckstraat 30, 3311 Gz Dordrecht, Netherlands. (Springer - www.springer.com; Cellulose - www.springerlink.com/content/0969-0239/)
The news editors report that additional information may be obtained by contacting D. Yang, Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, People's Republic of China. Additional authors for this research include X.W. Peng, L.X. Zhong, X.F. Cao, W. Chen and R.C. Sun (see also Nanocrystals).
Keywords for this news article include: Asia, Beijing, Chemicals, Chemistry, Sulfur Acids, Nanotechnology, Sulfuric Acids, Emerging Technologies, People's Republic of China
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