執行成果摘要
Six different algae were tested as raw materials for the study of nanocrystallinecellulose preparations. Wise method was used to analyze theholocellulose content of the algae. Except for Enteromorpha linza and E.intestinalis which has relatively low holocellulose content, all otheralgae contain holocellulose of ＞ 30%. As for ash content, the 2 Enteromorpha species had the highest content as much as 27%. For otheralgae, ash content ranged 7.2% to 19.7%. In addition, carbohydrateanalyses of all algae holocellulose indicated that talose was the mainingredient of all algae examined. Quantification of pentosan and hexosansuggested that the 2 Enteromorpha algae contained minute amounts ofpentosans, whereas the other algae, Cladophora sp., Spirulina platensis,Chlorellapyrenoidosa sp. and Nannochloropsis oculata had 100% hexosans.Crystallinity of holocellulose was the highest for the Enteromorpha algae and the lowest for Nannochloropsis oculata. Ball milling and TEMPO mediated oxidation methods were used to prepare algal nanocellulose. The TEMPO method generated nanocellulose with greater particle sizes, and its energy consumption was also lower. Thus, we deemed that the TEMPO method was superior. Among the 6 nano-celluloses obtained from the method, N.oculata had the best particle size of 115 nm.