非溶剂致相分离法3D打印聚醚酰亚胺宏/微观多孔结构的成型工艺研究

doi:10.3901/JME.2022.15.283

机械工程学报 ›› 2022, Vol. 58 ›› Issue (15): 283-291.doi: 10.3901/JME.2022.15.283

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非溶剂致相分离法3D打印聚醚酰亚胺宏/微观多孔结构的成型工艺研究

张莉彦, 高丽洁, 马昊鹏, 焦志伟, 杨卫民, 于源

北京化工大学机电工程学院北京 100029

收稿日期:2021-08-20 修回日期:2021-12-15 出版日期:2022-08-05 发布日期:2022-10-13
通讯作者: 于源(通信作者),女,1976年出生,博士,副教授。主要研究方向为先进制造技术及其应用。E-mail:yuyuanjd@263.net
作者简介:张莉彦,女,1966年出生,博士,副教授。主要研究方向为机械设计、高分子材料先进制造。E-mail:zhangly@mail.buct.edu.cn;高丽洁,女,1996年出生,硕士。主要研究方向为聚合物的3D打印。E-mail:1393375470@qq.com
基金资助:
2018年度珠海市产业核心和关键技术攻关方向资助项目（ZH01084702180085HJL）。

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

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

摘要/Abstract

摘要： 聚醚酰亚胺（PEI）具有良好的物理性能和生物相容性，是一种广受关注的医用植入材料。以聚醚酰亚胺（PEI）粉末和N-甲基吡咯烷酮（NMP）溶剂为原料制备了打印浆料，在湿度可控的环境下3D打印成型宏观孔结构，通过非溶剂致相分离和加热干燥脱除溶剂得到了微观孔结构，成型了具备宏/微观多孔结构的PEI制品。对热重曲线和红外光谱图进行分析，验证PEI制品可完全脱除NMP；采用电子显微镜和扫描电镜分析了PEI制品的宏/微观形貌，宏观孔径为470~550μm，微观孔径主要分布在20μm以下，孔隙率为57%~61%；对制品的力学性能进行测试，其拉伸强度最大为11.72 MPa，弹性模量最大为383 MPa。非溶剂致相分离3D打印工艺可成型具备宏/微观多孔结构的PEI制品，在医用植入支架中具有潜在应用前景。

关键词: 非溶剂致相分离, 3D打印, 宏/微观多孔结构, 聚醚酰亚胺

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)

中图分类号:

TH164

张莉彦, 高丽洁, 马昊鹏, 焦志伟, 杨卫民, 于源. 非溶剂致相分离法3D打印聚醚酰亚胺宏/微观多孔结构的成型工艺研究[J]. 机械工程学报, 2022, 58(15): 283-291.

ZHANG Liyan, GAO Lijie, MA Haopeng, JIAO Zhiwei, YANG Weimin, YU Yuan. Fabrication of Polyetherimide Macro/micro Porous Structure Using a Combination of 3D Printing and Non-solvent Induced Phase Separation[J]. Journal of Mechanical Engineering, 2022, 58(15): 283-291.

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非溶剂致相分离法3D打印聚醚酰亚胺宏/微观多孔结构的成型工艺研究

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

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