Creation of a cellulosic material with maintaining highly-controlled 3D structure was prepared by optimizing chemical treatment. Though alkaline processing and alcoholysis are effective approach to remove the lignin from lignified cell wall, neither chemical treatment is insufficient for bamboo block. However, we found the combination of alkaline processing and alcoholysis followed by repetition of bleaching treatment using sodium chlorite enabled to get rid of non-cellulosic components including hemicellulose and lignin from bamboo’s cell wall of parenchyma as well as that of vascular bundles.<br/>Then, multiple structural assessments from anatomical- to nano-level was performed by using X-ray CT (computed tomography), X-ray diffraction and transmission electron microscopy incorporated with TEMPO-mediated oxidation technique. X-ray CT was initially applied to observe the anatomical structure and inner architecture, which revealed that the typical cell arrangement was maintained. Next, X-ray diffraction analysis demonstrated microfibril orientation in the cell wall as well as natural crystalline structure of cellulose were unaltered. Lastly, cellulose nanofiber was obtained by applying TEMPO-mediated oxidation technique to evaluate the microfibril morphology. TEM observation image showed that the normal morphology of cellulose microfibrils was also kept. As abovementioned, multidirectional assessment revealed the White-Colored Bamboo" maintained its inherent hierarchical structure, which will prompt to produce new functional biomaterials. In addition, we will present a distribution of silica particles on the epidermis even in "White-Colored Bamboo".

Development of a cellulosic 3D structure white-colored bamboo”

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.