纤维增强水凝胶基复合材料的制备和纤维屈曲行为

Preparation and Stability Analysis of Fiber-reinforced Hydrogel Composites

水凝胶在组织工程、药物输送、以及智能驱动器等领域有着广阔的应用前景,尤其是纤维增强水凝胶基复合材料,对于具有纤维结构的软骨替代材料的设计有着重要的研究价值。本文提出了一种将弹性纤维定向添加到PAAm水凝胶基体中的制备方法,并研究了沿垂直于纤维方向拉伸时复合材料薄膜的力学行为。研究结果表明,当复合材料薄膜伸长比达到一定程度时,纤维发生屈曲失稳。通过理论分析,得到了纤维增强型PAAm水凝胶中纤维的屈曲临界伸长比。本文的研究将为纤维增强水凝胶基复合材料的设计及性能优化提供支撑。

Synthetic hydrogels can be used in many fields,such as scaffolds for tissue engineering,drug delivery and actuators.Especially,fiber-reinforced hydrogels play a vital role in the preparation of substitute materials for cartilage.This work presented a new method to synthesize elastic fiber-reinforced hydrogel composites and investigated the mechanical behavior of thin film made of this kind of composite.The results indicate that the oriented fibers imbedded in the hydrogel will buckle when the stretch reaches the critical value.We performed theoretical analysis and obtained the critical stretch.This study is useful for the design and properties optimization of the fiber reinforced hydrogel composites.