Abstract
Strategies for the synthesis of a new class of porous and nonporous biodegradable microparticles (MPs) based on poly(D,L-lactic acid)-poly(ethylene glycol)-COOH (PDLLA-PEG-COOH) or poly(D,L-lactide-co-glycolide) (PLGA) copolymers have been investigated. Further, these MPs were coated with polyethylenimine (PEI) in order to compare the performance of the naked and PEI-capped MPs for the gas phase capture of model aldehyde VOCs, hexanal and octanal. The removal efficiencies of the different MP formulations ranged from 50% reduction to 97% reduction of VOC vapors. By coupling the intrinsic gas adsorption properties of the parent, naked MPs with the potential for covalent capture by means of PEI-surface coating, we have generated new materials exhibiting a dual modality for VOC capture. These materials represent a new matrix for the remediation of VOCs based on renewable, sustainable polymers.
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