Na-cellulose formation in a single cotton fiber studied by synchrotron radiation microdiffraction.
A cotton fiber was kept under slight tension and exposed locally to a stream of aqueous 1 N NaOH microdrops of 50 microm diameter. The resulting "macrodrop" of about 300 microm size was at the origin of the formation of Na-cellulose I domains extending about 550 microm from the center of the macrodrop along the fiber. The phase transformation zone between cellulose I and Na-cellulose I was mapped by scanning synchrotron radiation microdiffraction using a 300 nm x 300 nm beam. A stitching technique was used to limit radiation damage. Subsequent exposure of the NaOH containing macrodrop to a stream of H2O or HCl microdrops converted part of the Na-cellulose I back into cellulose I.
Schoeck
J
J
European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France.
Davies
R J
RJ
Martel
A
A
Riekel
C
C
D002482:Cellulose / Q000737:chemistry*; D032561:Cotton Fiber; D008832:Microchemistry / Q000379:methods; D044367:Phase Transition; D012542:Scattering, Radiation; D012964:Sodium / Q000737:chemistry*; D012972:Sodium Hydroxide; D017356:Synchrotrons
D012972:Sodium Hydroxide; D002482:Cellulose; D012964:Sodium