摘要
分别用超声分散法和研磨法制备了纳米羟基磷灰石(n-HA)/聚1,2-丙二醇-癸二酸-柠檬酸酯复合材料。通过差示扫描量热法、扫描电子显微镜和透射电子显微镜对复合材料中n-HA的分散性及复合材料的玻璃化转变温度进行了分析,测试了复合材料的溶胶含量、力学性能及降解性能。结果表明,无论是采用研磨法还是超声分散法制备的复合材料,其玻璃化转变温度和溶胶含量都随着n-HA质量分数的增加而降低,降解速率都随着n-HA质量分数的增加而减小。研磨法是改善n-HA在复合材料中的分散性、提高复合材料力学性能的有效方法。用该方法通过改变n-HA质量分数可使复合材料的拉伸强度提高8.2倍,弹性模量提高11.4倍,而扯断伸长率基本保持不变。
Nano-hydroxyapatite （ n-HA ）/poly [ （ 1,2-propanediol-sebacate ） -citrate ] （ 1,2-PPSC ） composites were synthesized by ultrasonic dispersion method and grinding method respectively. The dispersion property of n-HA in n-HA/1,2-PPSC composites and glass transition temperature of two composites were analyzed by differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. The sol content, mechanical properties and degradation performance of n-HA/ 1,2-PPSC composites were also tested. The results showed that both the glass transition temperature and sol content of n-HA/1,2-PPSC composites decreased with the increase of mass fractions of n-HA and so did the degradation rate. The grinding method was an effective method to improve the dispersibility of n-HA and the mechanical properties of the composites. With the method, the tensile strength increased by 8.2 times, the modulus increased by 11.4 times, the elongation at break had little change.
出处
《合成橡胶工业》
CAS
CSCD
2010年第1期43-48,共6页
China Synthetic Rubber Industry
基金
北京市自然科学基金重点资助项目(2061002)
北京市科委研发攻关项目(Z08000003220000)
国家杰出青年基金资助项目(50725310)
