【摘要】 受大壁虎脚趾的微观结构启发，首先将两种不同模量的聚氯乙烯(PVC)凝胶浇注在表面有微孔阵列的硅模板上，制备出一种变模量仿生黏附材料。然后，对变模量和固定模量的仿生黏附材料在光滑玻璃片和具有不同表面粗糙度的印刷电路板(PCB)上进行黏附力测试。测试结果表明，变模量PVC凝胶仿生黏附材料的表面微柱阵列可以在保持大长径比的同时有更好的末端适应性，针对粗糙PCB的黏附力是固定模量仿生黏附材料的2～5倍；此外，PVC凝胶仿生黏附材料还具有易脱模的特性。最后，模仿大壁虎爬行时脚趾的翻折动作研制了仿生黏附抓手，配合所制备的变模量PVC凝胶仿生黏附材料成功地实现了对PCB的抓取与释放。更多还原

【Abstract】 Inspired by the microstructure of gecko’s toe, two kinds of polyvinyl chloride(PVC) gels with different modulus were poured on a silicon mold with micropillars, and then a bio-inspired adhesive with variable modulus was manufactured in this study. The adhesions of variable modulus and fixed modulus bio-inspired adhesives were tested,respectively, on a smooth glass and a printed circuit board(PCB) with different surface structures. The results show that PVC gel bio-inspired adhesives with variable modulus have many advantages compared with the fixed modulus bioinspired adhesives. The adhesion of variable modulus bio-inspired adhesives on the rough PCB surface increased by 2-5times, and due to the use of variable modulus of PVC gel, the surface micropillars can maintain high aspect ratio and flexible tips at the same time. Moreover, the use of PVC gel makes it easier to demold during the bio-inspired adhesives preparation. An adhesion-desorption device was made according to the movement of the gecko toes, and the PCB was successfully grasped.更多还原