A molecular-mechanical link in shear-induced self-assembly of a functionalized biopolymeric fluid.

ABSTRACT: ²³Na multiple quantum filtered (MQF) rheo-NMR methods were applied to probe the molecular foundation for flow induced self-assembly in 0.5% κ-carrageenan fluid. This method is sensitive enough to utilize an endogenous sodium ion concentration of approximately 0.02%. Rheo-NMR experiments were conducted at different temperatures and shear rates to explore varying molecular dynamics of the biopolymer in the fluid under shear. The temperature in the rheo-NMR experiments was changes from 288 K to 313 K to capture transition of κ-carrageenan molecules from helices to coils. At each temperature, the fluid was also tested for flow and oscillatory shear behaviour using bulk rheometry methods. It was found that the ²³Na MQF signals were observed for the 0.5% κ-car

SUBMITTER: Pavlovskaya GE 

PROVIDER: S-EPMC10155600 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature