Journal Article

FZJ-2023-03207

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interchain Hydrodynamic Interaction and Internal Friction of Polyelectrolytes

Buvalaia, E.FZJ* ; Kruteva, M.FZJ* ; Hoffmann, I. ; Radulescu, A.FZJ* ; Förster, S.FZJ* ; Biehl, R. (Corresponding author)FZJ*

2023
ACS Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsmacrolett.3c00409  doi:10.34734/FZJ-2023-03207

Abstract: Polyelectrolytes (PE) are polymeric macromolecules in aqueous solutions characterized by their chain topology and intrinsic charge in a neutralizing fluid. Structure and dynamics are related to several characteristic screening length scales determined by electrostatic, excluded volume, and hydrodynamic interactions. We examine PE dynamics in dilute to semidilute conditions using dynamic light scattering, neutron spinecho spectroscopy, and pulse field gradient NMR spectroscopy. We connect macroscopic diffusion to segmental chain dynamics, revealing a decoupling of local chain dynamics from interchain interactions. Collective diffusion is described within a colloidal picture, including electrostatic and hydrodynamic interactions. Chain dynamics is characterized by the classical Zimm model of a neutral chain retarded by internal friction. We observe that hydrodynamic interactions are not fully screened between chains and that the internal friction within the chain increases with an increase in ion condensation on the chain.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Biology (2nd)

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Contributing Institute(s):

1. Neutronenstreuung (JCNS-1)
2. Heinz Maier-Leibnitz Zentrum (MLZ)
3. Neutronenstreuung und biologische Materie (IBI-8)
4. JCNS-FRM-II (JCNS-FRM-II)
5. JCNS-4 (JCNS-4)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2023

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Database coverage:
; ; ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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