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本实验在猪主动脉的真空冷冻干燥各过程中,采用了相同的温度设定,但对一次干燥终点使用了不同的判定方法,通过Micro-CT扫描及称重分析,计算失水率、孔隙率、脱水率及力学性能等指标,比较出两种方法对结果造成的不同影响。实现了在现有的冻干设备及环境下,对一次干燥终点判断的优化方法。该方法很好地解决了冻干过程的管壁皱缩、组织塌陷问题,同时,提高了冻干后猪主动脉的脱水率、孔隙率及复水率,获得了更加良好的生物力学特性。
In this experiment, the same temperature setting was used in the process of vacuum freeze-drying porcine aorta. However, different judgment methods were used for one drying end point. Through the Micro-CT scanning and weighing analysis, the water loss rate, Rate, dehydration rate and mechanical properties and other indicators to compare the two methods have different effects on the results. In the existing freeze-drying equipment and the environment, to achieve a drying method to determine the end point of optimization. The method solves the problems of wall shrinkage and tissue collapse in the freeze-drying process, and at the same time, improves the dehydration rate, porosity and rehydration rate of the porcine aorta after lyophilization, and obtains more favorable biomechanical properties.