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Zhang Q, Wang X, Yang M, Xu D. Effects of void defects on the mechanical properties of biphasic calcium phosphate nanoparticles: A molecular dynamics investigation. J Mech Behav Biomed Mater 2024; 151:106385. [PMID: 38246094 DOI: 10.1016/j.jmbbm.2024.106385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/23/2024]
Abstract
Porous biphasic calcium phosphate (BCP) ceramics are widely used in bone tissue engineering, and the mechanical properties of BCP implants must be reliable. However, the effects of pore structure (e.g., shape and size) on the mechanical properties are not well understood. In this study, we used molecular dynamics simulations to investigate the influence of pore shape and size on the mechanical behavior of BCP nanoparticles. BCP void models with cylindrical and cuboid pores ranging from 2 to 16 nm in diameter were constructed, and the elastic moduli were calculated. In addition, uniaxial tensile and compressive tests were performed on the models. We found that the pore size had a more significant impact on the mechanical properties of BCP than pore shape. Further, the elastic moduli decreased nonlinearly with increasing pore size. In addition, the tensile and compressive strength also decreased with the increase in pore size, but the ductility improved. Furthermore, deformation and fracture were more likely to occur near the pores and at the phase interfaces as a result of high atomic local strain in the calcium-deficient hydroxyapatite area. The results of this work reveal the effects of pore parameters on the mechanical properties of porous BCP at the nanometer level, which may aid the design of improved porous and multiphase CaP-based biomaterials for bone regeneration.
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Affiliation(s)
- Qiao Zhang
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xin Wang
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Mingli Yang
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China; Research Center for Materials Genome Engineering, Sichuan University, Chengdu 610065, China.
| | - Dingguo Xu
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China; Research Center for Materials Genome Engineering, Sichuan University, Chengdu 610065, China.
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Ma Z, Kong K, Yin Y, Guo Z, Ma X, Lin Q, Wang J, Shen Y, Lu X, Xu X, Kong X, Liu Z, Tang R. High Mechanical Strength Alloy-like Minerals Prepared by Inorganic Ionic Co-cross-linking. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2308017. [PMID: 38009645 DOI: 10.1002/adma.202308017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 11/01/2023] [Indexed: 11/29/2023]
Abstract
Alloys often combine different metals to generate superior mechanical properties. However, it is challenging to prepare high mechanical strength minerals with similar strategies. Using calcium carbonate (CaC) and calcium phosphate (CaP) as examples, this work synthesizes a group of compounds with the chemical formulas Ca(CO3 )x (PO4 )2(1- x )/3 (0 < x < 1, CaCPs) by cross-linking ionic oligomers. Unlike mixtures, these CaCPs exhibit a single temperature for the phase transition from amorphous to crystallized CaC (calcite) and CaP (hydroxyapatite). By heat-induced synchronous crystallization, dual-phase CaC/CaP with continuous crystallized boundaries are resembled to alloy-like minerals (ALMs). The mechanical properties of the ALMs are adjusted by tailoring their chemical compositions to reach a hardness of 5.6 GPa, which exceed those of control calcite and hydroxyapatite samples by 430% and 260%, respectively. This strategy expands the chemical scope of inorganic materials and holds promise for preparing high-performance minerals.
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Affiliation(s)
- Zaiqiang Ma
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Kangren Kong
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Yu Yin
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Zhengxi Guo
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Xiaoming Ma
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Qingyun Lin
- Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jie Wang
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Yinlin Shen
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Xingyu Lu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Instrumentation and Service Centre for Molecular Sciences, Westlake University, Hangzhou, 310024, China
| | - Xurong Xu
- Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou, 310027, China
| | - Xueqian Kong
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
- Institute of Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Zhaoming Liu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou, 310027, China
| | - Ruikang Tang
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou, 310027, China
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