Recycled polypropylene for food contact: employment of a-C:H thin films by plasma deposition and degradation in the presence of contaminants

• Grant number: 16/25703-2
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2017
• End date: June 30, 2020
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Sandra Andrea Cruz
• Grantee: Sandra Andrea Cruz
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• City of the host institution: São Carlos
• Associated scholarship(s): 17/24316-8 - Degradation study of clarified polypropylene in presence of a-C:H contaminants and films: use of parallel plate rheometer and thermal analysis, BP.TT

Abstract

In this project, initially the clarified polypropylene will be contaminated with a series of contaminants stipulated by FDA. After that the samples will be recovered and reprocessed by extrusion. Different chemical structures of a-C:H thin films (diamond like carbon and polymer like carbon) are evaluated as functional barrier. The thin films will be deposited by Plasma Enhanced Chemical Vapor Deposition (PECVD). The chemical structure will be evaluated by infrared reflection-absorption spectroscopy and RAMAN. Before the deposition processes, the samples will be treated with oxygen plasma and the superficial modification evaluated by contact angle as well as atomic force microscopy. The functional barrier will be evaluated by migration tests. At a later stage, the influence of the presence of contaminants as well as the a-C:H films on the degradation of clarified PP during the recycling process will be analysed. The degradation will be evaluated by DSC, OIT, TGA, DMTA and parallel plate rheometry. (AU)

Scientific publications

(10)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

PAIVA, ROBERT; WRONA, MAGDALENA; NERIN, CRISTINA; VERONEZE, ISABELLY BERTOCHI; GAVRIL, GEORGIANA-LUMINITA; CRUZ, SANDRA ANDREA. Importance of profile of volatile and off-odors compounds from different recycled polypropylene used for food applications. Food Chemistry, v. 350, JUL 15 2021. (16/25703-2)

VERONEZE, ISABELLY BERTOCHI; ONOUE, LETICIA AKEMI; CRUZ, SANDRA ANDREA. Thermal Stability and Crystallization Behavior of Contaminated Recycled Polypropylene for Food Contact. JOURNAL OF POLYMERS AND THE ENVIRONMENT, v. N/A, p. 9-pg., 2022-04-21. (16/25703-2, 17/24316-8)

FITARONI, LAYS B.; CACURO, THIAGO A.; COSTA, CARLOS A. R.; LANZONI, EVANDRO M.; GALANTE, DOUGLAS; ARAUJO, JOYCE R.; HOMEM, MANOEL G. P.; WALDMAN, WALTER R.; CRUZ, SANDRA A.. Polymeric nanowrinkles: surface modification of polypropylene films in the VUV energy range. Journal of Materials Science, v. 56, n. 15, p. 9532-9543, MAY 2021. (15/08258-2, 16/24936-3, 16/25703-2)

DE LIMA, JULIANA A.; FITARONI, LAYS B.; WALDMAN, WALTER R.; CRUZ, SANDRA A.. Compatibilizer prevents the catalytic role of sepiolite in the thermal degradation of PP/Sep nanocomposites. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, v. 146, n. 6, p. 2481-2487, DEC 2021. (16/24936-3, 16/25703-2)

GIMENEZ, JESSICA CAROLINE FERREIRA; BONATTI, SOPHIA HELENA FELISBINO; BASAGLIA, MARCOS VINICIUS; GARCIA, RODRIGO HENRIQUE DOS SANTOS; DOS SANTOS, ALEF; STAFFA, LUCAS HENRIQUE; SAMARA, MAZEN; BETTINI, SILVIA HELENA PRADO; DE AZEVEDO, EDUARDO RIBEIRO; HELAL, EMNA; et al. ¹H Time Domain Nuclear Magnetic Resonance and Oscillatory Rheology as a Tool for Uncovering the Impact of UV-C Radiation on Polypropylene. POLYMERS, v. 17, n. 20, p. 18-pg., 2025-10-11. (16/25703-2)

PAIVA, ROBERT; VERONEZE, ISABELLY BERTOCHI; WRONA, MAGDALENA; NERIN, CRISTINA; CRUZ, SANDRA ANDREA. he Role of Residual Contaminants and Recycling Steps on Rheological Properties of Recycled Polypropylen. JOURNAL OF POLYMERS AND THE ENVIRONMENT, v. 30, n. 2, JUN 2021. (16/25703-2)

DE LIMA, JULIANA A.; FITARONI, LAYS B.; WALDMAN, WALTER R.; CRUZ, SANDRA A.. Compatibilizer prevents the catalytic role of sepiolite in the thermal degradation of PP/Sep nanocomposites. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, FEB 2021. (16/24936-3, 16/25703-2)

PAIVA, ROBERT; WRONA, MAGDALENA; NERIN, CRISTINA; CRUZ, SANDRA ANDREA. Hydrogenated amorphous carbon film deposited by plasma on recycled polypropylene as a functional barrier to hazardous migrants. FOOD PACKAGING AND SHELF LIFE, v. 33, p. 10-pg., 2022-09-01. (16/25703-2)

PAIVA, ROBERT; VERONEZE, ISABELLY BERTOCHI; WRONA, MAGDALENA; NERIN, CRISTINA; CRUZ, SANDRA ANDREA. The Role of Residual Contaminants and Recycling Steps on Rheological Properties of Recycled Polypropylene. JOURNAL OF POLYMERS AND THE ENVIRONMENT, v. 30, n. 2, p. 10-pg., 2021-06-22. (16/25703-2)

ONUE, LETICIA A.; RIBEIRO, LARA K.; GONCALVES, MARIANA O.; LONGO, ELSON; DE SOUSA, CRISTINA PAIVA; ASSIS, MARCELO; CRUZ, SANDRA A.. Unveiling Antimicrobial Properties and Crystallization Induction in PLA Using α-Ag₂WO₄ Nanoparticles. ACS APPLIED POLYMER MATERIALS, v. 6, n. 6, p. 10-pg., 2024-03-12. (13/07296-2, 16/13423-5, 16/25703-2)

Filed patent(s) as a result of this research project