Stimuli-Responsive Adhesives for Wearable Protection
Abstract
1.1 Design and synthesis of stimuli-responsive adhesives capable of chemical response to nerve agent simulants. Progress: 90% complete. A self-immolative polymer with end caps designed to react with fluoride ions was successfully synthesized (up to 3 g scale) and purified (>95% pure).Purity, structure, and thermal properties of the resulting polymeric material was characterized.1.2 Chemical actuation of the designed adhesives by nerve agents. Progress: 50% complete. Selective depolymerization of a self-immolative polymer with fluoride ions was studied with proton NMR and gel permeation chromatography. Chemical actuation was also studied with fluorescence spectroscopy.1.3 Design and synthesis of stimuli-responsive adhesives capable of chemical response to mustard agent simulants. Progress: 10% complete. An end cap for a self-immolative polymer was designed to react with a sulfur mustard mimic. COVID restrictions delayed this task due to restructuring of priorities.1.4 Chemical actuation of the designed adhesives by mustard agents. Progress: 10% complete. An end cap for a self-immolative polymer was designed to react with a sulfur mustard mimic. COVID restrictions delayed this task due to restructuring of priorities.1.5 Measurement of the rate of reaction of the designed adhesives with target chemicals. Progress: 90% complete. Studies focused on the depolymerization kinetic analysis for two sets of end caps on poly(phthalaldehyde): one set that has no known reactivity and one set that is cleaved with fluoride ions. The influence of acid strength on the depolymerization rate was also studied using benzoic acid and trifluoroacetic acid. Characterization methods include proton NMR, fluorescence spectroscopy, and gel permeation chromatography.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 29, 2022
- Accession Number
- AD1201368
Entities
People
- Katherine A. Mirica
Organizations
- Dartmouth College