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BIOBASED SPORE MICROCAPSULES FOR ASPHALT SELF-HEALING

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dc.creatorJOSÉ LUIS CONCHA FUENTEALBA
dc.creatorERIK ALPIZAR REYES
dc.creatorJOSÉ ERNESTO NORAMBUENA CONTRERAS
dc.date2022
dc.date.accessioned2025-01-10T15:30:34Z
dc.date.available2025-01-10T15:30:34Z
dc.date.issued2022
dc.description.abstractASPHALT PAVEMENTS AND BITUMINOUS COMPOSITES ARE MAJORLY DAMAGED BY BITUMEN AGING AND FATIGUE CRACKING BY TRAFFIC LOAD. TO ADD, MAINTENANCE AND REPARATION OF ASPHALT PAVEMENTS IS EXPENSIVE AND ALSO RELEASES SIGNIFICANT AMOUNTS OF GREENHOUSE GASES. THESE ISSUES CAN BE MITIGATED BY PROMOTING ASPHALT SELF-HEALING MECHANISMS WITH ENCAPSULATED REJUVENATORS. THE ABILITY OF THE REQUIRED MICROCAPSULES TO BE RESILIENT AGAINST HIGH TEMPERATURES, OXIDATION, AND MECHANICAL STRESS IS ESSENTIAL TO PROMOTE SUCH SELF-HEALING BEHAVIOR WITHOUT COMPROMISING THE FIELD PERFORMANCE OF THE ASPHALT PAVEMENT. THIS WORK PROPOSES, FOR THE FIRST TIME, THE USE OF EXTREMELY RESISTANT BIOBASED SPORES FOR THE ENCAPSULATION OF RECYCLED OIL-BASED REJUVENATORS TO PRODUCE MORE RESILIENT SELF-HEALING PAVEMENTS. SPORE ENCAPSULANTS WERE OBTAINED FROM NATURAL SPORES (LYCOPODIUM CLAVATUM) BY APPLYING DIFFERENT CHEMICAL TREATMENTS, WHICH ENABLED THE SELECTION OF THE BEST MORPHOLOGICALLY INTACT AND CLEAN SPORE ENCAPSULANT. THE PHYSICAL, MORPHOLOGICAL, AND PHYSICOCHEMICAL CHANGES WERE EXAMINED USING FLUORESCENCE IMAGES, ATR-FTIR, SEM, SIZE DISTRIBUTION, XRD, TGA AND DSC ANALYSES. SUNFLOWER OIL WAS USED AS THE ENCAPSULATED REJUVENATOR WITH AN OPTIMAL SOL COLLOIDAL MIXTURE FOR SPOROPOLLENIN?OIL OF 1:5 (GRAM-TO-GRAM). VACUUM, PASSIVE, AND CENTRIFUGAL ENCAPSULATION TECHNIQUES WERE TESTED FOR LOADING THE REJUVENATOR INSIDE THE CLEAN SPORES AND FOR SELECTING THE BEST ENCAPSULATION TECHNOLOGY. THE ENCAPSULATION EFFICIENCY AND THE PROFILES OF THE ACCELERATED RELEASE OF THE REJUVENATOR FROM THE LOADED SPORES OVER TIME WERE STUDIED, AND THESE PROCESSES WERE VISUALIZED WITH OPTICAL AND INVERTED FLUORESCENCE MICROSCOPY. VACUUM ENCAPSULATION WAS IDENTIFIED AS THE BEST LOADING TECHNIQUE WITH AN ENCAPSULATION EFFICIENCY OF 93.02 ± 3.71%. THE REJUVENATOR WAS SUCCESSFULLY ENCAPSULATED INTO THE CLEAN SPORES, AS OBSERVED BY OPTICAL AND SEM MORPHOLOGIES. IN AGREEMENT WITH THE TGA AND DSC, THE MICROCAPSULES WERE STABLE UP TO 204 °
dc.formatapplication/pdf
dc.identifier.doi10.1021/acsami.2c07301
dc.identifier.issn1944-8252
dc.identifier.issn1944-8244
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/12351
dc.languagespa
dc.publisherACS APPLIED MATERIALS & INTERFACES
dc.relation.uri10.1021/acsami.2c07301
dc.rightsPUBLICADA
dc.subjectsporopollenin
dc.subjectspores
dc.subjectspore microcapsules
dc.subjectself-healing
dc.subjectrejuvenators
dc.subjectmicrocapsules aged
dc.subjectbituminous materials asphalt
dc.subjectbitumen
dc.subjectbiobased spore
dc.titleBIOBASED SPORE MICROCAPSULES FOR ASPHALT SELF-HEALING
dc.title.alternativeMICROCÁPSULAS DE ESPORAS DE BASE BIOLÓGICA PARA LA AUTOCURACIÓN DEL ASFALTO
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionPROGRAMA DE ASISTENCIA TECNICA CON CO-FINANCIAMIENTO
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN MADERAS
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA CIVIL Y AMBIENTAL
ubb.SedeCONCEPCIÓN
ubb.SedeCONCEPCIÓN
ubb.SedeCONCEPCIÓN
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