Thermal analysis of polylactic acid under high CO2 pressure applied in supercritical impregnation and foaming process design
Samo za registrovane korisnike
2019
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Thermal properties of extrusion and injection grade polylactic acid (PLA) were analysed using high pressure differential scanning calorimetry (HP-DSC) under CO2 pressures of up to 50 MPa. The greatest depression of melting point and degree of crystallinity of the samples occurred at 20-30 MPa (similar to 97-115 degrees C). Batch and semi continuous processes for supercritical foaming and impregnation of PLA with thymol or thyme extract were performed at 30 MPa and 100-110 degrees C to prevent thymol degradation, decrease heating requirements and ease polymer processing. At these conditions, PLA foams containing 5.6% or 1.1% of thymol and 0.7% of thyme extract were obtained using static or dynamic batch impregnation and semi-continuous extraction-impregnation process for 7 h, respectively. DSC and HP-DSC analyses revealed more pronounced effect of scCO(2) plasticizing than foaming on PLA crystallinity. Neat and impregnated PLA foams with pores size of 15-200 pm have potential for food p...ackaging, biomedical and insulation applications.
Ključne reči:
High-pressure DSC / Polylactic acid / Supercritical impregnation / Supercritical foaming / Thymol / Thyme extractIzvor:
Journal of Supercritical Fluids, 2019, 144, 71-80Izdavač:
- Elsevier Science Bv, Amsterdam
Finansiranje / projekti:
- German Federal Ministry of Education and Research- BMBFFederal Ministry of Education & Research (BMBF) [FKZ 01PL11082B]
- Funkcionalni fiziološki aktivni biljni materijali sa dodatom vrednošću za primenu u farmaceutskoj i prehrambenoj industriji (RS-45017)
- German Academic Exchange serviceDeutscher Akademischer Austausch Dienst (DAAD) [57140416]
Napomena:
- Peer reviewed manuscript: http://technorep.tmf.bg.ac.rs/handle/123456789/5041
Povezane informacije:
- Verzija dokumenta
http://technorep.tmf.bg.ac.rs/handle/123456789/5041
DOI: 10.1016/j.supflu.2018.10.008
ISSN: 0896-8446
WoS: 000454371100010
Scopus: 2-s2.0-85055688745
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Kuska, Robert AU - Milovanović, Stoja AU - Frerich, Sulamith AU - Ivanović, Jasna PY - 2019 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4328 AB - Thermal properties of extrusion and injection grade polylactic acid (PLA) were analysed using high pressure differential scanning calorimetry (HP-DSC) under CO2 pressures of up to 50 MPa. The greatest depression of melting point and degree of crystallinity of the samples occurred at 20-30 MPa (similar to 97-115 degrees C). Batch and semi continuous processes for supercritical foaming and impregnation of PLA with thymol or thyme extract were performed at 30 MPa and 100-110 degrees C to prevent thymol degradation, decrease heating requirements and ease polymer processing. At these conditions, PLA foams containing 5.6% or 1.1% of thymol and 0.7% of thyme extract were obtained using static or dynamic batch impregnation and semi-continuous extraction-impregnation process for 7 h, respectively. DSC and HP-DSC analyses revealed more pronounced effect of scCO(2) plasticizing than foaming on PLA crystallinity. Neat and impregnated PLA foams with pores size of 15-200 pm have potential for food packaging, biomedical and insulation applications. PB - Elsevier Science Bv, Amsterdam T2 - Journal of Supercritical Fluids T1 - Thermal analysis of polylactic acid under high CO2 pressure applied in supercritical impregnation and foaming process design EP - 80 SP - 71 VL - 144 DO - 10.1016/j.supflu.2018.10.008 ER -
@article{ author = "Kuska, Robert and Milovanović, Stoja and Frerich, Sulamith and Ivanović, Jasna", year = "2019", abstract = "Thermal properties of extrusion and injection grade polylactic acid (PLA) were analysed using high pressure differential scanning calorimetry (HP-DSC) under CO2 pressures of up to 50 MPa. The greatest depression of melting point and degree of crystallinity of the samples occurred at 20-30 MPa (similar to 97-115 degrees C). Batch and semi continuous processes for supercritical foaming and impregnation of PLA with thymol or thyme extract were performed at 30 MPa and 100-110 degrees C to prevent thymol degradation, decrease heating requirements and ease polymer processing. At these conditions, PLA foams containing 5.6% or 1.1% of thymol and 0.7% of thyme extract were obtained using static or dynamic batch impregnation and semi-continuous extraction-impregnation process for 7 h, respectively. DSC and HP-DSC analyses revealed more pronounced effect of scCO(2) plasticizing than foaming on PLA crystallinity. Neat and impregnated PLA foams with pores size of 15-200 pm have potential for food packaging, biomedical and insulation applications.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Journal of Supercritical Fluids", title = "Thermal analysis of polylactic acid under high CO2 pressure applied in supercritical impregnation and foaming process design", pages = "80-71", volume = "144", doi = "10.1016/j.supflu.2018.10.008" }
Kuska, R., Milovanović, S., Frerich, S.,& Ivanović, J.. (2019). Thermal analysis of polylactic acid under high CO2 pressure applied in supercritical impregnation and foaming process design. in Journal of Supercritical Fluids Elsevier Science Bv, Amsterdam., 144, 71-80. https://doi.org/10.1016/j.supflu.2018.10.008
Kuska R, Milovanović S, Frerich S, Ivanović J. Thermal analysis of polylactic acid under high CO2 pressure applied in supercritical impregnation and foaming process design. in Journal of Supercritical Fluids. 2019;144:71-80. doi:10.1016/j.supflu.2018.10.008 .
Kuska, Robert, Milovanović, Stoja, Frerich, Sulamith, Ivanović, Jasna, "Thermal analysis of polylactic acid under high CO2 pressure applied in supercritical impregnation and foaming process design" in Journal of Supercritical Fluids, 144 (2019):71-80, https://doi.org/10.1016/j.supflu.2018.10.008 . .