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SUMMARY:Changes to the Nanostructure of Collagen in Skin During Leather Pr
 ocessing
DTSTART;VALUE=DATE-TIME:20141120T063000Z
DTEND;VALUE=DATE-TIME:20141120T080000Z
DTSTAMP;VALUE=DATE-TIME:20260413T234539Z
UID:indico-contribution-686@events01.synchrotron.org.au
DESCRIPTION:Speakers: Katie H. Sizeland (Massey University)\nLeather is a 
 complex biomaterial largely composed of collagen fibrils. As skins are pro
 cessed to produce leather\, chemical and physical changes take place that 
 affect the physical properties of the material. The structural foundation 
 of these changes at the collagen fibril level is not fully understood and 
 formed the basis of this investigation. Synchrotron-based small-angle X-ra
 y scattering was used to quantify fibril orientation and D-spacing through
  eight stages of processing from fresh green ovine skins to staked dry cru
 st leather. Both these structural aspects were found to change with proces
 sing. At a higher pH\, both D-spacing and the fibril orientation index are
  lower.  The elastic modulus also changes with high salt concentrations an
 d low pH conditions associated with materials that have a low elastic modu
 lus. This study shows that there are structural changes taking place durin
 g the processing of skin to leather. It is proposed the change in D-spacin
 g is due to pH affecting the H-bonding within the tropocollagen unit and t
 he decrease in OI is due to the relaxation of tension in the fibrils enabl
 ing the collagen fibrils to bend or distort more. This understanding infor
 ms the influence of the chemistry at different stages of processing on the
  development of the final physical characteristics of leather. By understa
 nding the structural changes of collagen that occur when skin is subjected
  to chemical and mechanical treatments\, it may be possible to modify some
  of these processing steps to alter the final properties of leather.\n\nht
 tps://events01.synchrotron.org.au/event/3/contributions/686/
LOCATION: NCSS Exhibition Area
URL:https://events01.synchrotron.org.au/event/3/contributions/686/
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