更新日: 2015/05/28

開催日時 2014/10/29(水曜日)
題目 Structural investigations of cellulosic materials using x-ray and neutron scattering
関連ミッション ミッション 1 (環境計測・地球再生)
ミッション 2 (太陽エネルギー変換・利用)


Paavo A. Penttilä (京都大学生存圏研究所・外国人共同研究者)


X-ray and neutron scattering methods are able to provide information on the structure of lignocelluloses on a wide range of length scales. Wide-angle x-ray scattering (WAXS) can be used to study the crystalline proportion of cellulose, yielding parameters such as crystal size, crystallinity, and fibrillar orientation. Small-angle x-ray and neutron scattering (SAXS and SANS), on the other hand, can be used to probe the nanoscale structure of these materials, including the short-range order of cellulose microfibrils and pore structure under both dry and wet states. This presentation surveys the structural information obtainable by WAXS and SAXS/SANS from fibrillar cellulosic materials. In particular, examples related to the effects of pressurized hot water treatment on birch sawdust and of enzymatic hydrolysis on cellulosic substrates will be presented.

Paavo A. Penttila: 第176回定例オープンセミナー資料(2014年10月29日) 図

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