RT Journal Article
T1 Rapid in situ quantification of rheo-optic evolution for cellulose spinning in ionic solvents
A1 Du, Jianyi
A1 Páez Cabaleiro, Javier
A1 Otero, Pablo
A1 Sanchez Vazquez, Pablo Breogan
K1 3303 Ingeniería y Tecnología Químicas
AB It is critical to monitor the structural evolution of complex fluids for optimal manufacturing performance, including textile spinning. However, in situ measurements in a textile-spinning process suffer from the paucity of non-destructive instruments and interpretations of the measured data. In this work, kinetic and rheo-optic properties of a cellulose/ionic liquid solution are measured simultaneously while fibers are regenerated in aqueous media from a model wet-spinning process via a customized polarized microscope. This system enables to capture key geometrical and structural information of the fiber under spinning at varying draw ratios and residence time, including the flow kinematics extracted from feature tracking, and the flow-induced morphology and birefringent responses. A physics-oriented rheological model is applied to connect the kinematic and structural measurements in a wet-spinning process incorporating both shear and extensional flows. The birefringent responses of fibers under coagulation are compared with an orientation factor incorporated in the constitutive model, from which a superposed structure-optic relationship under varying spinning conditions is identified. Such structural characterizations inferred from the flow dynamics of spinning dopes exhibit strong connections with the mechanical properties of the fully-regenerated fibers, thus enabling to predict the spinning performance in a non-destructive protocol.
PB Carbohydrate Polymers
SN 01448617
YR 2023
FD 2023-11-15
LK http://hdl.handle.net/11093/6379
UL http://hdl.handle.net/11093/6379
LA eng
NO Carbohydrate Polymers, 320, 121229 (2023)
NO Agencia Estatal de Investigación | Ref. PRE2020-093158
DS Investigo
RD 21-sep-2024