| 王娟,马凤仓,刘平,张柯,陈小红.桐油?海藻酸钙自修复涂层的制备及性能研究[J].有色金属材料与工程,2025,46(3):19-25. |
| 桐油?海藻酸钙自修复涂层的制备及性能研究 |
| Preparation and properties of tung oil-calcium alginate self-healing coating |
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| DOI：10.13258/j.cnki.nmme.20230410002 |
| 中文关键词: 海藻酸钙 桐油 耐摩擦磨损性能 耐腐蚀性能 |
| 英文关键词:calcium alginate tung oil friction and wear resistance performance corrosion resistance |
| 基金项目:国家自然科学基金资助项目（51771119） |
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| 中文摘要: |
| 不锈钢被广泛应用于植入材料和医疗器械领域，但在人体环境中易发生腐蚀，导致器械失效。为解决这一问题，设计了一种自修复涂层：采用原位乳液聚合法制备以医用桐油为核芯、海藻酸钙为壳的核壳结构桐油?海藻酸钙微胶囊，然后将该胶囊分散于改性硅凝胶中形成耐磨、耐腐蚀涂层。通过扫描电子显微镜、傅里叶变换红外光谱仪以及热重分析仪等对微胶囊进行表征。结果表明：当涂层中微胶囊质量分数为15%时，其耐磨性能最佳，摩擦因数低至0.32，磨损深度仅0.35 mm；在模拟体液中浸泡20 d后低频阻抗为7.0×105 Ω·cm2，表明桐油作核芯对微裂纹具有自修复作用。 |
| 英文摘要: |
| Stainless steel is widely used in implant materials and medical devices, but it is susceptible to corrosion in the human body environment, which can lead to device failure. To address this problem, a self-healing coating was designed. Core-shell microcapsules of tung oil-calcium alginate with medical tung oil as the core and calcium alginate as the shell material were prepared by in situ emulsion polymerization, and then the microcapsules were dispersed in modified silicone gel to form a wear-resistant and corrosion-resistant coating. The microcapsules were characterized by scanning electron microscope, Fourier transform infrared spectrometer and thermogravimetric analyzer. The results show that when the mass fraction of microcapsule in the coating is 15%, the wear resistance is optimal, the friction coefficient is as low as 0.32, and the wear depth is only 0.35 mm. After being immersed in the simulated body fluid for 20 d, the low-frequency impedance was 7.0×105 Ω·cm2, which demonstrated that tung oil as the core has a self-healing effect on microcracks. |
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