材料科学
抗压强度
3D打印
复合材料
纳米技术
生物医学工程
工程类
作者
Qinghua Chen,Bin Zou,Qingguo Lai,Kaiwen Zhu
标识
DOI:10.1016/j.ceramint.2022.07.047
摘要
Herein, poly (ethylene glycol) diacrylate (PEGDA)/nanohydroxyapatite (nHAP) biomaterials were prepared by stereolithography (SLA), rendering optimal compressive strength. PEGDA and photoinitiator I2959 were mechanically mixed with bioceramic nHAP to prepare a paste with simple composition, suitable viscosity, and excellent photocurable ability. The content of the photoinitiator in the paste was determined by the cytotoxicity of cured samples. Then, the solid content of paste and processing parameters were optimized by a uniform design experiment method according to the curing characteristics of PEGDA/nHAP paste and compressive strength of PEGDA/nHAP printed specimens. As a result, the minimum cured width of a single line of PEGDA/nHAP paste reached 65 μm on the XY plane, mainly influenced by laser power. The minimum cured depth of PEGDA/nHAP paste was found to be 150 μm, which was influenced by hatch spacing. The compressive strength of PEGDA/nHAP-printed specimens reached a maximum of 61.0 ± 3.9 MPa, which was about 1700% higher than pure PEGDA (3.6 ± 0.9 MPa). SLA-prepared PEGDA/nHAP biomaterials can meet compressive strength requirements of bone tissue (2–80 MPa), showing promise in the field of bone regeneration.
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