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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

Title data

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. Vol. 140 (2023) Issue 19 . - e53822.
ISSN 1097-4628
DOI: https://doi.org/10.1002/app.53822

Official URL: Volltext

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: carbonaceous nanoparticles; electrical conductivity; molecular weight; morphology; poly(lactic acid) foam; rheological behavior
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Polymer Materials
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 04 Nov 2023 22:38
Last Modified: 06 Nov 2023 06:39
URI: https://eref.uni-bayreuth.de/id/eprint/87474