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Experimental Study for the Sorption and Diffusion of Supercritical Carbon Dioxide into Polyetherimide.
Huang, Wei-Heng; Chen, Pei-Hua; Chen, Chin-Wen; Su, Chie-Shaan; Tang, Muoi; Tsai, Jung-Chin; Chen, Yan-Ping; Lin, Feng-Huei.
Afiliación
  • Huang WH; Department of Chemical and Materials Engineering, Chinese Culture University, Taipei 111396, Taiwan.
  • Chen PH; Department of Biomedical Engineering, National Taiwan University, Taipei 106319, Taiwan.
  • Chen CW; Department of Orthopedics, Shuang Ho Hospital, Taipei Medical University, New Taipei City 235041, Taiwan.
  • Su CS; Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106344, Taiwan.
  • Tang M; Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106344, Taiwan.
  • Tsai JC; Department of Chemical and Materials Engineering, Chinese Culture University, Taipei 111396, Taiwan.
  • Chen YP; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan.
  • Lin FH; Department of Chemical Engineering, National Taiwan University, Taipei 106319, Taiwan.
Molecules ; 29(17)2024 Sep 06.
Article en En | MEDLINE | ID: mdl-39275083
ABSTRACT
Supercritical carbon dioxide (SCCO2) is a non-toxic and environmentally friendly fluid and has been used in polymerization reactions, processing, foaming, and plasticizing of polymers. Exploring the behavior and data of SCCO2 sorption and dissolution in polymers provides essential information for polymer applications. This study investigated the sorption and diffusion of SCCO2 into polyetherimide (PEI). The sorption and desorption processes of SCCO2 in PEI samples were measured in the temperature range from 40 to 60 °C, the pressure range from 20 to 40 MPa, and the sorption time from 0.25 to 52 h. This study used the ex situ gravimetric method under different operating conditions and applied the Fickian diffusion model to determine the mass diffusivity of SCCO2 during sorption and desorption processes into and out of PEI. The equilibrium mass gain fraction of SCCO2 into PEI was reported from 9.0 wt% (at 60 °C and 20 MPa) to 12.8 wt% (at 40 °C and 40 MPa). The sorption amount increased with the increasing SCCO2 pressure and decreased with the increasing SCCO2 temperature. This study showed the crossover phenomenon of equilibrium mass gain fraction isotherms with respect to SCCO2 density. Changes in the sorption mechanism in PEI were observed when the SCCO2 density was at approximately 840 kg/m3. This study qualitatively performed FTIR analysis during the SCCO2 desorption process. A CO2 antisymmetric stretching mode was observed near a wavenumber of 2340 cm-1. A comparison of loss modulus measurements of pure and SCCO2-treated PEI specimens showed the shifting of loss maxima. This result showed that the plasticization of PEI was achieved through the sorption process of SCCO2.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Suiza