复杂超声模体快速制造及其B超成像

发布时间：2018-06-11 20:15

  本文选题：复杂超声模体 + 羟基磷灰石　； 参考：《石家庄铁道大学》2015年硕士论文

【摘要】：本文针对超声模体仿骨骼材料和结构进行研究。在材料上,结合高分子材料的易加工和疏水性能,将纳米羟基磷灰石颗粒与环氧树脂、聚氨酯进行复合来制备仿骨骼材料。在结构上,对胎儿模型整体成型的问题与其硅胶模具制造过程中存在脱模困难等问题进行解决。首先,采用KH550硅烷偶联剂改性后的n-HA和E-44型号环氧树脂为原料,制备n-HA/环氧树脂复合材料。其性能测定结果表明,n-HA在环氧树脂基体中分散均匀,n-HA/环氧树脂复合材料试样能够在一定时间内于仿肌肉组织材料中不溃散,在B超下的观察图像呈现亮白色、外缘轮廓清晰可辨。采用透射法测试复合材料试样,其声速为3 353.727 6 m/s,声衰减系数为37.332 4 dB/(m·Hz)。然后,以蓖麻油和n-HA为原料,以异佛尔酮二异氰酸酯为交联剂,1,4-丁二醇为扩链剂,采用原位复合法制备n-HA/PU复合材料。其性能测定结果表明,当n-HA加入量为37%,固化条件为25℃真空脱泡1 h处理,移入37℃电热干燥箱内36 h后,升温60℃至固化完全。该条件下制备的n-HA/PU复合材料,n-HA在聚氨酯基体中分散均匀,n-HA/PU试样能够在一定时间内于仿肌肉组织中不溃散,B超下图像清晰可辨。最后,综合考虑子宫内胎儿的真实体态、硅胶模具的尺寸大小及硅胶模型拆模难易程度等因素,将模型手指、脚趾等细节部位改为合并状态,修改模型尺寸后采用整体浇注制造硅胶模具。经过修改的胎儿模型进行仿肌肉组织材料浇注后,B超图像显示轮廓清晰。将仿骨骼材料脊骨实体,内置于胎儿硅胶模具中,将仿肌肉组织材料浇注入胎儿硅胶模具中,固化成型后拆模得到多组织复杂超声模体。在B超下观察,仿肌肉组织材料的胎儿外形轮廓能够清晰分辨,仿骨骼复合材料脊骨模型呈现高亮白。两种材料明暗亮度有着显著差异,在B超设备下观察效果良好。
[Abstract]:In this paper, the bone materials and structures of ultrasonic motifs were studied. Based on the easy processing and hydrophobicity of polymer materials, nano-hydroxyapatite particles were combined with epoxy resin and polyurethane to prepare bone imitating materials. In the aspect of structure, the problems of the whole foetal model forming and the difficulty of removing the mould in the process of manufacturing the silicone mold are solved. Firstly, n-HA / epoxy resin composites were prepared by using n-HA and E-44 epoxy resin modified by KH550 silane coupling agent as raw materials. The results showed that the homogenized n-HA / epoxy resin composites dispersed in epoxy resin matrix could not collapse in the muscle tissue material for a certain time, and the observed images under B-ultrasound showed bright white. The contour of the outer edge is clearly discernible. The sound velocity and attenuation coefficient of the composite materials are 3 353.727 6 m / s and 37.332 4 dB / m 路s ~ (-1), respectively, measured by transmission method. Then, n-HA / pu composites were prepared by in-situ compounding method with castor oil and n-HA as raw materials and isophorone diisocyanate as crosslinking agent and 1,4-butanediol as chain extender. The results show that when n-HA content is 37%, curing condition is 25 鈩，

本文编号：2006556