Moshkriz Ali, Shahroodi Zahra, Darvishi Reza
Department of Chemical Engineering, Faculty of Engineering, Arak University Arak 38156-8-8349 Iran.
Institue of Polymer Processing, Montanuniversitaet Leoben 8700 Leoben Austria.
RSC Adv. 2023 Jun 13;13(26):17818-17833. doi: 10.1039/d3ra02940a. eCollection 2023 Jun 9.
In this study, a new thermoplastic vulcanizate (TPV) blend of silicone rubber (SR) and poly (3-hydroxybutyrate--3-hydroxy valerate) (PHBV) including silicon-modified graphene oxide (SMGO), is used to fabricate highly flexible and sensitive strain sensors. The sensors are built with an extremely low percolation threshold of 1.3 vol%. We investigated the effect of adding SMGO nanoparticles to strain-sensing applications. The findings demonstrated that increasing the SMGO concentration enhanced the composite's mechanical, rheological, morphological, dynamic mechanical, electrical, and strain-sensing capabilities. But too many SMGO particles can reduce elasticity and cause nanoparticle aggregation. The nanocomposite's gauge factor (GF) values were discovered to be 375, 163, and 38, with nanofiller contents of 5.0 wt%, 3.0 wt%, and 1.0 wt% respectively. Cyclic strain-sensing behavior showed their ability to recognize and classify various motions. Due to its superior strain-sensing capabilities, TPV5 was chosen to assess the repeatability and stability of this material when utilized as a strain sensor. The sensor's excellent stretchability, sensitivity (GF = 375), and remarkable repeatability during cyclic tensile testing allowed them to be stretched beyond 100% of the applied strain. This study offers a new and valuable method for building conductive networks in polymer composites, with potential uses in strain sensing, especially in biomedical applications. The study also emphasizes the potential of SMGO as a conductive filler for developing extremely sensitive and flexible TPEs with enhanced, environmentally friendly features.
在本研究中，一种新型的由硅橡胶（SR）和聚（3-羟基丁酸酯-3-羟基戊酸酯）（PHBV）组成的热塑性硫化橡胶（TPV）共混物，其中包括硅改性氧化石墨烯（SMGO），被用于制造高柔韧性和高灵敏度的应变传感器。这些传感器的渗滤阈值极低，仅为1.3体积%。我们研究了添加SMGO纳米颗粒对应变传感应用的影响。研究结果表明，增加SMGO的浓度可提高复合材料的机械、流变、形态、动态力学、电学和应变传感性能。但过多的SMGO颗粒会降低弹性并导致纳米颗粒聚集。发现纳米复合材料的应变片系数（GF）值分别为375、163和38，纳米填料含量分别为5.0重量%、3.0重量%和1.0重量%。循环应变传感行为表明它们能够识别和分类各种运动。由于其卓越的应变传感性能，TPV5被选来评估该材料用作应变传感器时的重复性和稳定性。该传感器具有出色的拉伸性、灵敏度（GF = 375）以及在循环拉伸测试中显著的重复性，使其能够被拉伸超过所施加应变的100%。本研究为在聚合物复合材料中构建导电网络提供了一种新的有价值的方法，在应变传感方面具有潜在应用，尤其是在生物医学应用中。该研究还强调了SMGO作为导电填料开发具有增强的、环境友好特性的极其灵敏和灵活的热塑性弹性体的潜力。
