Development of FRP composed by bioactive glass fiber and polymer for bone reconstruction

本研究的目的是开发一种由生物活性玻璃纤维和可生物降解聚合物组成的新型骨重建材料。研究了na22o - cao - tio_2 - sio_2 （NCTS）的抗拉强度和溶解度。纯净水浸泡24h后，nts玻璃纤维的抗拉强度约为浸泡前的49.2%。与纯水接触后，nts玻璃纤维的抗拉强度迅速下降。纯水浸泡30分钟后试样呈现碱性。溶液的pH值约为10。其pH值不随时间变化。nts玻璃纤维在浸水中的溶解量随时间的增加而增加。浸泡30 d后，Na_2O、CaO、TiO_2、SiO_2在水中的质量%分别为9.0、0、0、6.5。NCTS玻璃纤维在模拟体液的浸渍作用下，抗拉强度增加。NCTS玻璃纤维在模拟体液浸泡10天后的抗拉强度为浸泡前的110%。纯水浸泡后的NCTS玻璃纤维表面形貌呈非均匀性，形状不规则。另一方面，模拟体液浸泡后的NCTS玻璃纤维的SEM图像显示，NCTS玻璃纤维上有晶态磷灰石。

The purpose of this research was to develop a new FRP material composed by bioactive glass fiber and biodegradable polymer for bone reconstruction. The tensile strength and solubility of Na_2O-CaO-TiO_2-SiO_2 (NCTS) have been studied. The tensile strength of NCTS glass fiber at 24 hours of the immersion of purity water was about 49.2 % of that before the immersion. The exposure to purely water rapidly decreased the tensile strength of the NCTS glass fiber. A purely water immersed specimens exhibit alkaline properties at 30 minutes. The pH of the solution was about 10. Its pH did not change with time. The contents of NCTS glass fiber dissolved in the immersed water, and these amounts increased with time. At 30 days after immersion, the amount of Na_2O, CaO, TiO_2, SiO_2 in water was 9.0, 0, 0, 6.5 mass%, respectively.In immersion of simulated body fluid, the tensile strength of NCTS glass fiber increased. NCTS glass fiber at 10 days after immersion of simulated body fluid showed the 110% tensile strength of NCTS glass fiber before immersion.The surface morphology of NCTS glass fiber after immersion of purely water was heterogeneous, showing irregular shape. On the other hand, SEM image of the NCTS glass fiber after immersion of the simulated body fluid show the crystalline apatites on the NCTS glass fiber.