• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2022, Vol. 58 ›› Issue (15): 283-291.doi: 10.3901/JME.2022.15.283

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Fabrication of Polyetherimide Macro/micro Porous Structure Using a Combination of 3D Printing and Non-solvent Induced Phase Separation

ZHANG Liyan, GAO Lijie, MA Haopeng, JIAO Zhiwei, YANG Weimin, YU Yuan   

  1. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029
  • Received:2021-08-20 Revised:2021-12-15 Online:2022-08-05 Published:2022-10-13

Abstract: There has been increasing attention to polyetherimide(PEI) recently, which is a medical implant material with excellent physical properties and biocompatibility.The printing slurry is prepared using polyetherimide(PEI) powder and N-methyl pyrrolidone(NMP) solvent.The PEI product with macro porous structure is 3 D printed under controllable environmental humidity and the micro pore structure of the PEI product is formed after non-solvent induced phase separation and heat drying.Thus, the PEI product with macro/micro composite porous structure is obtained.It is verified that NMP is completely removed from the PEI product through the analysis of the thermogravimetric(TG) curve and Fourier transform infrared(FT-IR) spectroscopy;The macro and micro morphology of PEI product are analysed by electron microscope and scanning electron microscope.The results show that the macropore sizes are 470-550 μm, the micropore sizes are less than 20 μm, and the porosity is 57% -61%;The mechanical tests show that the maximum tensile strength of PEI product is 11.72 MPa and the maximum elastic modulus is 383 MPa.The PEI products with macro/micro porous structure can be fabricated using the process combining 3 D printing and non-solvent induced phase separation, which has potential application prospects in medical implant scaffolds.

Key words: non-solvent induced phase separation, 3D printing, macro/micro porous structure, polyetherimide(PEI)

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