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- 저자 : Hermínio C. de Sousa (검색결과 1 건)
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Eco-friendlier and sustainable natural-based additives for poly(vinyl chloride)-based composites
Sofia Marceneiro,Irene Lobo,Isabel Dias,Elizabete de Pinho,Ana M.A. Dias,Hermínio C. de Sousa 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
This work presents novel natural-based and solvent-free additives for poly(vinyl chloride) (PVC), namelycalcium soaps, obtained for the first time from naturally occurring epoxidized soybean and linseed oils(ESO/ELO); and biogenic calcium carbonate, obtained from chicken eggshells (EG) after different acidand/or thermal pre-treatments. Results show that these additives were able to: i) reduce the concentrationof volatile organic compounds released from PVC films, including alcohols, aldehydes, esters andphthalates (97,95,90 and 84% chromatographic peak area reduction, respectively), originating safer materials;ii) improve the long-term thermal stability of PVC-based materials, while maintaining theirmechanical performance and when compared to control samples formulated with a high-performancecommonly employed solvent-based thermal stabilizer. Films formulated with ESO-based calcium soapsand with EG powders treated with acid and thermal treatment (200 C) presented the best performancein terms of heat aging and long-term thermal stability. The former also slightly improved the thermomechanicalproperties of the films indicating that these additives are also working as secondary plasticizersfor PVC. This work gives an important contribution towards the safety and sustainability of highperformancePVC-based materials, by allowing the substitution of commercially available thermal stabilizersby new eco-friendlier and safer alternatives obtained from renewable sources.
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