Enhancing mechanical integrity of vat photopolymerization 3D printed hydroxyapatite scaffolds through overcoming peeling defects

Liang, Haowen1; Hu, Bowen1; Li, Rongtian2; Sun, Jinxing1; Wang, Yue1; Zhou, Peng3; Cai, Peng1; Bai, Jiaming1

2024-11-01

10.1016/j.jeurceramsoc.2024.05.064

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY   影响因子和分区

0955-2219

1873-619X

In ceramic vat photopolymerization (VPP) fabrication, directly peeling originally designed scaffolds from the platform is efficient but often introduces defects, compromising the mechanical integrity of hydroxyapatite (HAp) scaffold. The peeling process involves the resistance of the HAp green scaffolds to peeling forces, which is influenced by its modulus and toughness. In this study, the peeling behavior of cubic-pore HAp (CP-HAp) green scaffolds with varying levels of modulus and toughness was investigated. The characterization results show that the HDDA CP-HAp scaffolds with relatively high levels of modulus and toughness could effectively resist the peeling forces and inhibit the occurrence of peeling defects. Stress concentration and inadequate toughness in the HEMA CP-HAp scaffolds lead to the formation of peeling defects. The CTFA and PHEA CP-HAp scaffolds with low modulus exhibit both peeling cracks and numerous pores. The cracks result from stress concentration, while the pores are caused by the coiled and loose molecular chain structure occupying space. Understanding the mechanism of peeling defect initiation in HAp porous scaffolds contributes to improving resistance to such defects and efficiently fabricating high-performance ceramic scaffolds using VPP.

Defects analysis Peeling process Hydroxyapatite scaffolds Vat photopolymerization 3D printing

SCI ; EI

英语

第一 ; 通讯

National Key R&D Program of China["2022YFE0197100","2023YFB4603502"] ; Shenzhen Science and Technology Innovation Commission[KQTD20190929172505711] ; Post-doctoral Later-stage Foundation Project of Shenzhen Polytechnic University[6020271011K1] ; China Postdoctoral Science Foundation[2023M731499] ; Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation[pdjh2024c10810] ; Dean's Research Fund of Southern University of Science and Technology Hospital[2022-D1]

Materials Science

Materials Science, Ceramics

WOS:001274490500001

ELSEVIER SCI LTD

20242416254859

Cracks ; Elastic moduli ; Hydroxyapatite ; Photopolymerization ; Scaffolds ; Stress concentration

Construction Equipment:405.1 ; Light/Optics:741.1 ; Printing Equipment:745.1.1 ; Inorganic Compounds:804.2 ; Polymerization:815.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol Hosp, Shenzhen 518055, Peoples R China
3.Shenzhen Polytech Univ, Inst Intelligent Mfg Technol, Shenzhen 518055, Peoples R China

Liang, Haowen,Hu, Bowen,Li, Rongtian,et al. Enhancing mechanical integrity of vat photopolymerization 3D printed hydroxyapatite scaffolds through overcoming peeling defects[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2024,44(14).

Liang, Haowen.,Hu, Bowen.,Li, Rongtian.,Sun, Jinxing.,Wang, Yue.,...&Bai, Jiaming.(2024).Enhancing mechanical integrity of vat photopolymerization 3D printed hydroxyapatite scaffolds through overcoming peeling defects.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,44(14).

Liang, Haowen,et al."Enhancing mechanical integrity of vat photopolymerization 3D printed hydroxyapatite scaffolds through overcoming peeling defects".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 44.14(2024).