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HomeKey Engineering MaterialsKey Engineering Materials Vol. 989Process Optimization of Pressure-induced Autoclave...

Process Optimization of Pressure-induced Autoclave Foaming of Polylactide by Supercritical CO₂ Using Central Composite Design of Response Surface Methodology

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Abstract:

A pressure-induced autoclave foaming assisted by supercritical CO₂ of degradable polylactide (PLA) has been developed. A central composite design (CCD) of response surface methodology (RSM) is used to optimize three distinct process conditions: foaming temperature, pressure, and time. The mathematical model built for examining the effect of process conditions on the foam density and volume expansion ratio was verified and determined to be acceptable with an R-square value derived from the regression model of 0.930 and 0.934, respectively. The experimental and statistical results showed that of the three factors examined, the foaming pressure had the greatest impact on the density and volume expansion ratio of the PLA foams. The foaming temperature and time also had significant interaction impacts on both responses. It was observed that the following conditions are optimal for foaming of PLA, with a maximum VER of 10.107 and a minimum foam density of 0.123 g/cc: foaming temperature of 165.86 °C and foaming pressure of 152.4 bar for 2.38 h of foaming time.

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The 5th International Conference on Chemical Sciences (ICCS)

Engineering Materials and Advanced Research: Biomedical Materials, Welding Technologies and Energy Storage

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Periodical:

Key Engineering Materials (Volume 989)

Pages:

87-98

DOI:

https://doi.org/10.4028/p-P2RfZe

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Online since:

October 2024

Authors:

Yusuf Arya Yudanto*, Atitsa Petchsuk, Pakorn Opaprakasit

Keywords:

Foams, Optimization, PLA, Response Surface Methodology, Supercritical CO₂

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© 2024 Trans Tech Publications Ltd. All Rights Reserved

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