Improvement in Mechanical Properties of 3D-Printed PEEK Structure by Nonsolvent Vapor Annealing

被引：24

作者：

Chen, Wenhui ^{[1
,2
]}

Zhang, Xiaolong ^{[1
,2
]}

Tan, Di ^{[1
,2
]}

Xu, Peng ^{[1
,2
]}

Yang, Baisong ^{[1
,2
]}

Shi, Kui ^{[1
,2
]}

Zhu, Bo ^{[1
,2
]}

Liu, Quan ^{[1
,2
]}

Lei, Yifeng ^{[1
,2
]}

Liu, Sheng ^{[1
,2
]}

Xue, Longjian ^{[1
,2
]}

机构：

[1] Wuhan Univ, Sch Power & Mech Engn, 8 South Donghu Rd, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Inst Technol Sci, 8 South Donghu Rd, Wuhan 430072, Peoples R China

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2022年 / 43卷 / 07期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

3D printing; mechanical property; poly-ether-ether-ketone (PEEK); post-processing; solvent vapor annealing; MELTING BEHAVIOR; SOLVENT; POLYMER; PERFORMANCE; CRYSTALLIZATION; TOUGH; PARTS;

D O I：

10.1002/marc.202100874

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The broad applications of 3D-printed poly-ether-ether-ketone (3D-PEEK) structures are largely hampered by their inadequate mechanical properties that can be improved by post treatments. At present, thermal annealing is generally used to improve the mechanical properties of 3D-PEEK. However, it cannot simultaneously improve strength and ductility. Here, a cost-effective postprocessing method is developed to improve the mechanical properties of 3D-PEEK, based on annealing in nonsolvent vapor at room temperature. The annealing in nonsolvent vapor at room temperature simultaneously improves the strength, ductility, and fracture energy of as-printed 3D-PEEK by 22.6%, 151.3%, and 109.1%, respectively. The improved mechanical properties are attributed to enhanced interfacial bonding, increased crystallinity, decreased pinhole defects, and stress relaxation in the 3D-PEEK. Moreover, the annealing in both polar solvents (such as acetone and chloroform) and nonpolar solvents (such as n-hexane) are demonstrated to be effective for improving the mechanical properties of 3D-PEEK. The nonsolvent vapor-annealed 3D-PEEK can thus have potential applications in the fields of medical implants, automotive, aerospace, and more.

引用

页数：8

共 51 条

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