Periodic disorder, composed of the repeating of crystalline and amorphous domains, sheds light on the structure of regenerated cellulose fibers. The presence of periodic disorder has been reported on two regenerated cellulose fibers, Rayon fiber (19.3 nm) and Fortisan (16.5 nm). However, in this report, the relationship between periodic disorder and the other structural parameters were unclear due to the limited number of samples. Here, we would like to propose small angle neutron scattering (SANS) experiment using Ioncell and several regenerated fibers from Lenzing AG. Ioncell is a regenerated cellulose fiber from an ionic liquid ([DBNH]OAc), and we can control the structural parameters of Ioncell by adjusting the spinning parameters. We will study these controlled samples to interconnect the periodic disorder system and structure model in regenerated fibers. In addition to standard fibers, we will apply Ioncell composite fibers with several additive polymers to pursue the change of periodic disorder. SANS with selective deuteration will be used to enhance the contrast between amorphous and crystalline cellulose.

2019