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Data on Nanowhiskers Reported by Researchers at Wuhan University

February 18, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- New research on Nanowhiskers is the subject of a report. According to news reporting originating from Wuhan, People's Republic of China, by NewsRx correspondents, research stated, "All-cellulose nanocomposites, comprising two different forms of cellulose nanowhiskers dispersed in two different matrix systems, are produced. Acid hydrolysis of both tunicate (T-CNWs) and cotton cellulose (CNWs) is carried out to produce the nanowhiskers."

Our news editors obtained a quote from the research from Wuhan University, "These nanowhiskers are then dispersed in a cellulose matrix material, produced using two dissolution methods; namely lithium chloride/N,N-dimethyl acetamide (LiCl/DMAc) and sodium hydroxide/urea (NaOH/urea). Crystallinity of both nanocomposite systems increases with the addition of nanowhiskers up to a volume fraction of 15 v/v%, after which a plateau is reached. Stress-transfer mechanisms, between the matrix and the nanowhiskers in both of these nanocomposites are reported. This is achieved by following both the mechanical deformation of the materials, and by following the molecular deformation of both the nanowhiskers and matrix phases using Raman spectroscopy. In order to carry out the latter of these analyses, two spectral peaks are used which correspond to different crystal allomorphs; cellulose-I for the nanowhiskers and cellulose-II for the matrix."

According to the news editors, the research concluded: "It is shown that composites comprising a LiCl/DMAc based matrix perform better than NaOH/urea based systems, the T-CNWs provide better reinforcement than CNWs and that an optimum loading of nanowhiskers (at 15 v/v%) is required to obtain maximum tensile strength and modulus."

For more information on this research see: Deformation micromechanics of all-cellulose nanocomposites: Comparing matrix and reinforcing components. Carbohydrate Polymers, 2014;100():31-39. Carbohydrate Polymers can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Carbohydrate Polymers - www.elsevier.com/wps/product/cws_home/405871)

The news editors report that additional information may be obtained by contacting T. Pullawan, Wuhan University, Dept. of Chem, Wuhan 430072, People's Republic of China. Additional authors for this research include A.N. Wilkinson, L.N.N. Zhang and S.J. Eichhorn (see also Nanowhiskers).

Keywords for this news article include: Asia, Urea, Wuhan, Nanowhiskers, Nanocomposite, Nanotechnology, Organic Chemicals, Emerging Technologies, People's Republic of China

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Source: Life Science Weekly


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