改性羟基磷灰石/聚羟基脂肪酸酯复合材料的制备及性能研究
Preparation and Properties Study of Modified Hydroxyapatite/ Polyhydroxyalkanoate Composites
研究通过湿化学法制备锶掺杂羟基磷灰石(Sr-HA),将其与聚羟基脂肪酸酯(PHA)复合,系统探究Sr-HA质量分数(0~20%)对复合材料微观结构、力学性能、热性能及生物活性的影响,旨在开发适用于骨再生领域的生物复合材料。X射线衍射分析证实Sr成功取代Ca,晶体结构完整,质量分数不超过15%的Sr-HA可在PHA基体中均匀分散,而高掺杂量会出现团聚现象。力学性能测试显示,断裂强度在添加15% Sr-HA时达到峰值,断裂伸长率先降后升,冲击强度线性下降,15% Sr-HA为强度和韧性平衡点。差示扫描量热分析结果表明,熔融温度先升后降,熔融峰从双峰向单峰转变,体现异相成核效应。扫描电镜观察验证了分散-团聚演变,与性能趋势耦合。生物活性评估显示,Sr-HA能够促进细胞增殖,矿化强度随Sr-HA用量呈线性提升,这归因于Sr的促成骨效应。该复合材料能实现多功能优化,匹配骨组织模量,提升骨诱导潜力。
The study prepared strontium-doped hydroxyapatite (Sr-HA) via a wet chemical method and compounded it with polyhydroxyalkanoates (PHA). It systematically investigated the effects of Sr-HA mass fraction (0~20%) on the microstructure, mechanical properties, thermal properties, and bioactivity of the composites, with the aim of developing bio-composites suitable for bone regeneration applications. X-ray diffraction analysis confirmed that Sr successfully replaced Ca and that the crystal structure remained intact. Sr-HA with a mass fraction of no more than 15% could be uniformly dispersed in the PHA matrix, while higher content led to agglomeration. Mechanical property test revealed that the tensile strength peaked at 15% Sr-HA, the elongation at break first decreased and then increased, and the impact strength decreased linearly, with 15% Sr-HA being the balance point between strength and toughness. Differential scanning calorimetry results indicated that the melting temperature first increased and then decreased, with the melting peak shifting from a double peak to a single peak, demonstrating a heterogeneous nucleation effect. Scanning electron microscopy observations verified the dispersion-agglomeration evolution, which was coupled with the property trends. Bioactivity assessment showed that Sr-HA could promote cell proliferation and that the mineralization strength increased linearly with the amount of Sr-HA used, attributed to the osteogenic effect of Sr. The composites achieved multifunctional optimization, matching the modulus of bone tissue and enhancing osteoinductive potential.
| [1] |
吴杰, 王仕杰, 刘之烨. 可降解材料聚羟基脂肪酸酯的研究进展[J]. 塑料科技, 2025, 53(8): 207-211. |
| [2] |
石立旺, 张楠, 周同, |
| [3] |
田强运, 裴树昆, 马晓军, |
| [4] |
李家伟, 张克宏, 李文慧, |
| [5] |
邬建飞, 王丙龙, 刘宇, |
| [6] |
魏岱旭, 谭友果. 聚羟基脂肪酸酯医用器件在骨科领域应用的研究进展[J]. 中国修复重建外科杂志, 2023, 37(8): 909-917. |
| [7] |
CI H, |
| [8] |
|
| [9] |
|
| [10] |
吴静, 黄嘉园, 蓝峻峰, |
| [11] |
相恒学, 曾佳, 陈姿晔, |
| [12] |
吕名秀, 韩仁旺, 海红森, |
| [13] |
曹宏伟, 杜琳娟, 郭洺伽, |
| [14] |
杨慎宇, 苗秋菊. 聚羟基脂肪酸酯/掺铈硫酸钙复合材料的制备及性能研究[J]. 塑料科技, 2023, 51(6): 24-28. |
| [15] |
齐美丽, 梅凤策, 黄浩, |
| [16] |
高建勇, 田刚, 朱强, |
| [17] |
蒋飞, 王德平, 王会, |
| [18] |
于佳, 俞建长, 付燕秋, |
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
杨接来, 徐俊, 谷辉杰, |
| [24] |
李春玲, 海士坤, 杜琳琳, |
| [25] |
|
湖南省聚酰胺新材料工程技术研究中心技术创新能力提升项目(2024ZYQ010)
河南省黄河科技学院教育部产学合作协同育人项目(230724081407313)
/
| 〈 |
|
〉 |