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SUMMARY:Keynote 3\, Paavo Penttilä - X-ray and neutron scattering for str
 uctural analysis of lignocellulosics
DTSTART;VALUE=DATE-TIME:20220601T132000Z
DTEND;VALUE=DATE-TIME:20220601T140000Z
DTSTAMP;VALUE=DATE-TIME:20260531T141202Z
UID:indico-contribution-1477@lindico453.srv.lu.se
DESCRIPTION:Speakers: Paavo Penttilä (Aalto University\, Finland)\nX-ray 
 and neutron scattering provide powerful tools for the characterization of 
 plant cell wall nanostructures. They require minimal sample preparation an
 d offer possibilities for experiments at various external conditions\, suc
 h as under varying temperature or humidity. Statistically significant\, av
 eraged information of the sample structure over multiple levels of structu
 ral hierarchy can be obtained in a single measurement. Scattering methods 
 have therefore yielded significant new information on the structure of lig
 nocellulosic materials in their native\, hydrated state and for instance a
 s a function of moisture changes.\nWide-angle X-ray scattering (WAXS) is s
 ensitive to the crystalline portion of cellulose microfibrils\, whereas sm
 all-angle X-ray and neutron scattering (SAXS\, SANS) detect structures of 
 larger length scales. Especially in the case of wood\, SAXS and SANS can b
 e used to characterize the lateral size and moisture-sensitive bundling of
  the microfibrils in the secondary cell walls. The swelling of the microfi
 bril bundles with moisture is associated with changes in the cellulose cry
 stallites\, as observed with WAXS.\nThis presentation introduces scatterin
 g-based results on moisture in wood and the interactions of water with mic
 rofibril bundles. It includes newly developed tools for the data analysis 
 and complementary results with modelling. It will also cover examples of s
 mall-angle scattering analysis of biomimetic composites formed of bacteria
 l cellulose and wood hemicelluloses. These findings highlight the capabili
 ties of scattering methods in the structural characterization of lignocell
 ulosics.\n\nhttps://lindico453.srv.lu.se/event/280/contributions/1477/
LOCATION:Lund University Palaestra
URL:https://lindico453.srv.lu.se/event/280/contributions/1477/
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