Umer Usama, Abidi Mustufa Haider, Mian Syed Hammad, Alasim Fahad, Aboudaif Mohammed K
Advanced Manufacturing Institute, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia.
Industrial Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia.
Polymers (Basel). 2024 Oct 10;16(20):2860. doi: 10.3390/polym16202860.
By using piezoelectric materials, it is possible to convert clean and renewable energy sources into electrical energy. In this paper, the effect on the piezoelectro-elastic response of piezoelectric-fiber-reinforced nanocomposites by adding silica nanoparticles into the polyimide matrix is investigated by a micromechanical method. First, the Ji and Mori-Tanaka models are used to calculate the properties of the nanoscale silica-filled polymer. The nanoparticle agglomeration and silica-polymer interphase are considered in the micromechanical modeling. Then, considering the filled polymer as the matrix and the piezoelectric fiber as the reinforcement, the Mori-Tanaka model is used to estimate the elastic and piezoelectric constants of the piezoelectric fibrous nanocomposites. It was found that adding silica nanoparticles into the polymer improves the elastic and piezoelectric properties of the piezoelectric fibrous nanocomposites. When the fiber volume fraction is 60%, the nanocomposite with the 3% silica-filled polyimide exhibits 39%, 31.8%, and 37% improvements in the transverse Young's modulus ET, transverse shear modulus GTL, and piezoelectric coefficient e31 in comparison with the composite without nanoparticles. Furthermore, the piezoelectro-elastic properties such as ET, GTL, and e31 can be improved as the nanoparticle diameter decreases. However, the elastic and piezoelectric constants of the piezoelectric fibrous nanocomposites decrease once the nanoparticles are agglomerated in the polymer matrix. A thick interphase with a high stiffness enhances the nanocomposite's piezoelectro-elastic performance. Also, the influence of volume fractions of the silica nanoparticles and piezoelectric fibers on the nanocomposite properties is studied.
通过使用压电材料，可以将清洁的可再生能源转化为电能。本文采用微观力学方法研究了在聚酰亚胺基体中添加二氧化硅纳米颗粒对压电纤维增强纳米复合材料压电弹性响应的影响。首先，利用Ji模型和Mori-Tanaka模型计算纳米级二氧化硅填充聚合物的性能。在微观力学建模中考虑了纳米颗粒团聚和二氧化硅-聚合物界面相。然后，将填充聚合物视为基体，压电纤维视为增强体，利用Mori-Tanaka模型估算压电纤维状纳米复合材料的弹性常数和压电常数。研究发现，在聚合物中添加二氧化硅纳米颗粒可改善压电纤维状纳米复合材料的弹性和压电性能。当纤维体积分数为60%时，与不含纳米颗粒的复合材料相比，填充3%二氧化硅的聚酰亚胺纳米复合材料的横向杨氏模量ET、横向剪切模量GTL和压电系数e31分别提高了39%、31.8%和37%。此外，随着纳米颗粒直径的减小，ET、GTL和e31等压电弹性性能会得到改善。然而，一旦纳米颗粒在聚合物基体中团聚，压电纤维状纳米复合材料的弹性常数和压电常数就会降低。具有高刚度的厚界面相会增强纳米复合材料的压电弹性性能。此外，还研究了二氧化硅纳米颗粒和压电纤维的体积分数对纳米复合材料性能的影响。
