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Continuous extrusion foaming process of biodegradable nanocomposites based on poly(lactic acid)/carbonaceous nanoparticles with different geometric shapes : An insight into involved physical, chemical and rheological phenomena

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00007276
URN zum Zitieren der Version auf EPub Bayreuth: urn:nbn:de:bvb:703-epub-7276-9

Titelangaben

Soleimanpour, Amirali ; Khonakdar, Hanieh ; Mousavi, Seyed Rasoul ; Banaei, Nastaran ; Hemmati, Farkhondeh ; Arjmand, Mohammad ; Ruckdäschel, Holger ; Khonakdar, Hossein Ali:
Continuous extrusion foaming process of biodegradable nanocomposites based on poly(lactic acid)/carbonaceous nanoparticles with different geometric shapes : An insight into involved physical, chemical and rheological phenomena.
In: Journal of Applied Polymer Science. Bd. 140 (2023) Heft 19 . - e53822.
ISSN 1097-4628
DOI der Verlagsversion: https://doi.org/10.1002/app.53822

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Abstract

Abstract One-step extrusion foaming process of biodegradable poly(lactic acid) (PLA)-based nanocomposites in the presence of chemical foaming agent and chain extender has great complexity to control. In this work, PLA-based nanocomposites containing different carbonaceous nanoparticles with different geometric shapes were obtained through a co-rotating twin-screw extrusion process to get insight into the dominant phenomena, which control the structural and final properties of PLA foams. The reactive extrusion foaming of PLA melt was investigated in the presence of carbon black, carbon nanotubes (CNTs), graphene oxide (GO), and a chain extender additive as well as a chemical foaming agent. Nanoparticles affect the continuous extrusion foaming of PLA melt through several phenomena, including providing bubble heterogeneous nucleation sites, intensifying the chemical decomposition of the foaming agent, improving the PLA structural modification reaction, increasing PLA molecular weight and restricting the dissolved gas removal from the melt. By influencing the involved phenomena in process, the nanoparticles at low levels, especially CNT and GO, increased the void content and cell size of PLA foams. The incorporation of CNT and GO nanofillers at the 0.5 phr level increased the electrical conductivity of PLA foams sharply by 9 and 10 orders of magnitude, resulting in lightweight, biodegradable semi-conductive foams.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Keywords: carbonaceous nanoparticles; electrical conductivity; molecular weight; morphology; poly(lactic acid) foam; rheological behavior
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Polymere Werkstoffe > Lehrstuhl Polymere Werkstoffe - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Polymere Werkstoffe
Sprache: Englisch
Titel an der UBT entstanden: Ja
URN: urn:nbn:de:bvb:703-epub-7276-9
Eingestellt am: 03 Nov 2023 08:49
Letzte Änderung: 03 Nov 2023 08:49
URI: https://epub.uni-bayreuth.de/id/eprint/7276

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