在模型组织中扩散对Mg合金生物腐蚀的影响
Manas Ranjan Sahu1, Akiko Yamamoto1
1Research Centre for Macromolecules and Biomaterials, National Institute of Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan.
Colloids and surfaces. B, Biointerfaces
|March 18, 2025
概括
开发了一种新的体外组织模型,以更好地预测体内的 (Mg) 合金腐蚀. 该模型考虑了离子和气体扩散,改善了可生物降解植入物的腐蚀率预测.
科学领域:
- 生物材料科学 生物材料科学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 在体外试验往往无法准确预测 (Mg) 合金的体内腐蚀.
- 差异来自于体外环境和体外环境之间的离子和气体扩散速率的差异.
研究的目的:
- 开发一个改进的体外组织模型,模拟不同的扩散速率.
- 使用开发的模型评估WE43和AZ31 Mg合金的生物腐蚀行为.
主要方法:
- 通过向细胞培养基添加加厚剂来控制扩散,开发模型组织.
- 分析Mg合金腐蚀通过浸泡研究 (28天),电化学阻抗光谱和潜在动力极化.
- 不溶盐层组成的特征.
主要成果:
- 添加加厚剂降低了WE43和AZ31 Mg合金的腐蚀率.
- 随着加厚剂度的增加,WE43的腐蚀率下降;AZ31的敏感性较低.
- AZ31对扩散速率变化的敏感性较低,这是由于它的电荷转移速度较慢 (Icorr较低,Rct较高).
- 模拟组织浸泡减少了WE43盐层中的Ca和P.
结论:
- 开发的模型组织通过控制扩散速率有效模拟体内条件.
- AZ31在不同的扩散环境中表现出稳定的腐蚀行为,这与个性化医学有关.
- 该模型有助于为可生物降解的植入物应用选择合适的Mg合金.
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