News Column

Study Findings from University of Tokyo Broaden Understanding of Urea

February 18, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Researchers detail new data in Urea. According to news reporting originating from Tokyo, Japan, by NewsRx correspondents, research stated, "Transparent and flexible cellulose-clay (montmorillonite, MTM) nanocomposite films are prepared from cellulose/LiOH/urea solutions. The results show that the composites possess intercalated nanolayered structures."

Our news editors obtained a quote from the research from the University of Tokyo, "Almost no Na ions are present in MTM, probably because they are substituted by Li ions. The nanocomposite films possess high mechanical strength and gas barrier properties, and lower coefficients of thermal expansion than those of the original cellulose film. In particular, the composite film of 85% cellulose and 15% MTM has the highest tensile strength and Young's modulus 161 and 180% greater than those of the 100% cellulose film, and coefficient of thermal expansion and oxygen permeability at 50-75% RH decrease to 60 and 42-33%, respectively. Moreover, the initial hydrophilic nature of cellulose film changes to somewhat hydrophobic through incorporation of hydrophilic MTM platelets."

According to the news editors, the research concluded: "This is probably because the orientation of cellulose chains on the film surface changes by the formation of numerous hydrogen bonds between cellulose molecules and MTM platelets."

For more information on this research see: Cellulose-clay layered nanocomposite films fabricated from aqueous cellulose/LiOH/urea solution. Carbohydrate Polymers, 2014;100():179-184. Carbohydrate Polymers can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier -; Carbohydrate Polymers -

The news editors report that additional information may be obtained by contacting Q.L. Yang, University of Tokyo, Grad Sch Agr & Life Sci, Bunkyo Ku, Tokyo 1138657, Japan. Additional authors for this research include C.N. Wu, T. Saito and A. Isogai (see also Urea).

Keywords for this news article include: Asia, Urea, Tokyo, Japan, Organic Chemicals

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Source: Life Science Weekly

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