Electroanalytical Studies of Transport Phenomena and Electrostatic Interactions in Polyacrylate Gels.

reportActive / Technical Report | Accession Number: ADA365807 | Open PDF

Abstract:

The transport of uncharged electroactive probes, 1,1-ferrocenedimethanol and 4-hydroxy-TEMPO, and electroactive cations, Tl, was studied in polyacrylate hydrogels using steady-state voltammetry at platinum and mercury film microelectrodes, and conductance measurements. It was found that for concentrations of polymer less than 1.5, the diffusion coefficient of uncharged probes does not differ significantly from that observed in aqueous solutions without a polymeric network. For the probe cation, strong electrostatic interactions were observed between Tl and anionic polymeric networks those interactions resulted in a significant decrease in the diffusivity of Tl cations. Experimental data for Tl transport in sodium polyacrylate gels were compared with predictions of Mannings theory for polyelectrolyte solutions. Electrostatic interactions between Tl and anionic polyacrylate three dimensional gel network were found stronger than those predicted for solutions of an equivalent polyelectrolyte. Theoretical expressions for conductivity as a function of polyacrylic acid neutralization degree were developed based on Mannings line charge model.

Author(s):
Hyk, Wojciech ; Ciszkowska, Malgorzata
Author Organization(s):
BROOKLYN COLL NY DEPT OF CHEMISTRY
Descriptive Note:
Technical rept. 1 Oct 98-30 Jun 99,
Pagination:
0011

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-4
Contract/Grant Number(s):
N00014-98-1-0244
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_JCA_4.1.2_Sustain the Force; JCA_4.1_Deployment and Distribution; JCA_6_Net Centric; JCA_6.1_Information Transport; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_8_Building Partnerships
Communities of Interest:
Materials and Manufacturing Processes
Descriptor(s):
*POLYMERS, *TRANSPORT PROPERTIES, *ACRYLATES, *GELS, STEADY STATE, CATIONS, CONDUCTIVITY, POLYELECTROLYTES, THIN FILMS, ELECTROCHEMISTRY, ELECTRODES, MERCURY, PLATINUM, DIFFUSION COEFFICIENT, VOLTAMMETRY, ANIONS, ELECTROSTATICS, SOLID STATE CHEMISTRY, ANALYTICAL CHEMISTRY, THALLIUM, ACRYLIC ACID, ION MOLECULE INTERACTIONS, AQUEOUS SOLUTIONS
Field(s)/Group(s):
Polymer Chemistry, Atomic and Molecular Physics and Spectroscopy
Keyword(s):
*POLYACRYLATES, ELECTROACTIVE PROBES, 1 1 FERROCENEDIMETHANOL, 4 HYDROXY TEMPO, TEMPO(TETRAMETHYLPIPERIDINYLOXY), HYDROGELS, CONDUCTANCE MEASUREMENTS, MANNING S THEORY
Report Date:
1999 Jul 15
Creation Date:
1999 Jul 28