This study demonstrated the sensing performance of surface-patterned poly(dimethylsiloxane) (PDMS)/carbon nanotube (CNT: 3–5 wt%) nanocomposite pads. PDMS/CNT nanocomposite pads as a flexible sensing platform were prepared by employing a series of techniques: 3-roll milling for mixing, 2-roll for pad formation, and imprinting for pattern development. Then, tailored surface engineering strategy was introduced. First, the silane coupling agent was incorporated to improve the surface compatibility of the nanocomposite pads. The change in surface property was monitored by shift in contact angle from 132 to 141°. Subsequently, the beta-cyclodextrin (CD) molecules were introduced as a sensing medium through a simple bio-conjugation reaction. The nanocomposite pads showed a sensitive response to methylparaben (MePRB), a representative preservative for cosmetics through host-guest interactions between CD and MePRB in the range of 1–100 nmol. Owing to the surface hydrophobicity of the nanocomposite pads, the sensor was found most effective under nonpolar solvents. The feasibility of surface engineered PDMS/CNT pad as a flexible sensor was demonstrated by measurement after 50 times manual bending. This study can be a useful example for the application of nanocomposites that show unique surface structure and properties.

这项研究证明了表面图案化的聚二甲基硅氧烷（PDMS）/碳纳米管（CNT：3-5 wt％）纳米复合垫的传感性能。通过采用一系列技术制备了PDMS / CNT纳米复合垫作为柔性传感平台：3辊研磨进行混合，2辊进行垫形成以及压印以进行图案显影。然后，介绍了量身定制的表面工程策略。首先，掺入硅烷偶联剂以改善纳米复合垫的表面相容性。通过将接触角从132°改变为141°来监测表面性质的变化。随后，通过简单的生物共轭反应将β-环糊精（CD）分子作为传感介质引入。纳米复合垫对对羟基苯甲酸甲酯（MePRB）敏感，通过CD和MePRB之间在1-100 nmol范围内的客体-客体相互作用，一种化妆品的代表性防腐剂。由于纳米复合垫的疏水性，该传感器在非极性溶剂中被认为是最有效的。经过50次手动弯曲后的测量证明了表面工程设计的PDMS / CNT垫作为柔性传感器的可行性。这项研究对于纳米复合材料的应用可能是一个有用的例子，这些复合材料显示出独特的表面结构和特性。