超临界二氧化碳/乙醇共发泡法制备聚醚酰亚胺泡沫制品

doi:10.11896/cldb.20070274

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Abstract In this paper, the foaming behaviors of poly(ether-imide) (PEI) in supercritical carbon dioxide (scCO₂) were studied by depressurization batch foaming method. The effects of saturation pressure, foaming temperature and depressurization rate on PEI foam structure were systematically studied. Co-blowing agents and nucleating agent were further introduced to enhance the foaming ability and optimize the foam structures. PEI beads were foamed and fused simultaneously in the confined stainless mould to obtain PEI foamed parts with adjustable expansion ratio and cellular structure. The results indicated that the expansion ratio of PEI by using scCO₂ as foaming agent were less than 3 fold, due to the harsh foaming conditions; the introduction of co-blowing agents such as tetrahydrofuran (THF) and ethanol (EtOH) was very helpful to improve the foaming ability and increase the expansion ratio, the nucleation number and cell density could be further enhanced by using carbon nanotubes (CNTs) as nucleating agent. The PEI and PEI/CNTs foam parts obtained from co-foaming method featured fine inter-bead bonding qualities and exhibited excellent mechanical performance, the tensile strength and compression strength of the PEI foam were 5.7 MPa and 5.6 MPa, respectively.

Key words： poly(ether-imide) batch foaming supercritical CO₂ co-foaming agents foam parts

Published: 07 September 2021

CLC number:

TQ328

Fund:National Natural Science Foundation of China (51720105012).

About author:: Bo Wang, who has studied at Kunming University of Science and Technology since September 2020, is currently a first-year graduate student, and engages in the research of high performance and multifunction polymer materials.
Dong Fengreceived his Ph.D. degree in polymer science and engineering from State Key Laboratory of Polymer Materials Engineering of Sichuan University in June 2020. He is currently a lecturer in the Faculty of Chemical Engineering of Kunming University of Science and Technology. He is mainly engaged in the research of processing and application of high performance polymer foams, focusing on the design and preparation of functional polymer composites and structural compo-sites. He has published more than 20 SCI and EI papers as the first or corresponding author, and 3 authorized patents.

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Cite this article:

WANG Bo,FENG Dong. Preparation of Poly(ether-imide) Foam Parts by Supercritical Carbon Dioxide/Ethanol Co-foaming Method[J]. Materials Reports, 2021, 35(16): 16201-16210.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20070274 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16201

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