第187回定例オープンセミナー資料

2014年10月29日

題目

Structural investigations of cellulosic materials using x-ray and neutron scattering

発表者

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

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）

要旨

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.