Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: June 1, 2004
Publication Date: August 22, 2004
Citation: Finkenstadt, V.L., Willett, J.L. 2004. Preparation and characterization of functionalized electroactive biopolymers [abstract]. American Chemical Society. p.25. Technical Abstract: Biopolymers have the potential for use as a matrix for applications such as controlled release devices, environmentally sensitive membranes, mimic materials and energetic applications. Renewable resources (such as starch) can be utilized as polymer matrices for electroactive material. Natural polymers are generally more environmentally-friendly and biocompatible than existing synthetic products. Thermoplastic starch is naturally insulative; however, the chemical, electrical, and mechanical properties of the biopolymer matrix can be tailored for specific functionality in a continuous process utilizing reactive extrusion. Conductance can be measured in the solid state by a direct-current resistance method. Ion-conducting materials, produced by doping thermoplastic starch biopolymers with metal halides, have 5 orders of magnitude greater conductance than native materials. There is a correlation between polymer mobility and conductance. We have investigated several types of starch of different origin, derivatized starches, and plant or microbial biopolymers with ionic functional groups. These have shown promise for higher levels of conductance. The conductance approaches the level of synthetic polymer electrolytes.