Water-repellent adhesive patch and method manufacturing the same
Disclosed are a skin-attachable adhesive patch mimicking a leg structure of a diving beetle and having excellent skin-attachment ability even in a dry or wet condition, and a method for manufacturing the same. The skin-attachable adhesive patch includes a substrate; a plurality of negative pressure chambers formed on a surface of the substrate, wherein each of the plurality of negative pressure chambers has a truncated hollow sphere structure; a micro-wrinkle layer formed on at least a portion of a remaining area of the substrate except for an area thereof where the negative pressure chambers are formed; and a patterned carbon particle layer formed on the micro-wrinkle layer.
1 . A skin-attachable adhesive patch comprising:
a substrate;
a plurality of negative pressure chambers formed on a surface of the substrate, wherein each of the plurality of negative pressure chambers has a truncated hollow sphere structure;
a micro-wrinkle layer formed on at least a portion of a remaining area of the substrate except for an area thereof where the plurality of negative pressure chambers are formed; and
a patterned carbon particle layer formed on the micro-wrinkle layer,
wherein the patterned carbon particle layer is formed such that roots of a plurality of carbon particles are embedded in the micro-wrinkle layer and remaining exposed portions thereof are irregularly entangled with each other to form a network.
2 . The skin-attachable adhesive patch of claim 1 , wherein the patterned carbon particle layer is formed by:
placing a patterned mask on a stretchable substrate in a stretched state;
spraying a dispersion in which carbon particle powders are dispersed onto the stretchable substrate;
relaxing the stretchable substrate to restore the stretchable substrate to an original shape;
coating a polymer precursor on the stretchable substrate on which the patterned carbon particle layer has been formed; and
stamping the stretchable substrate having the coated polymer precursor formed thereon onto a surface of the micro-wrinkle layer.
3 . The skin-attachable adhesive patch of claim 1 , wherein each of the plurality of carbon particles is a multi-wall carbon nanoparticle.
4 . The skin-attachable adhesive patch of claim 1 , wherein the micro-wrinkle layer has a wrinkle structure in which micro-wrinkles throughout the micro-wrinkle layer are oriented in the same direction.
5 . The skin-attachable adhesive patch of claim 1 , wherein a diameter of the truncated hollow sphere structure of each of the plurality of negative pressure chambers is smaller than a diameter of a full sphere from which the truncated hollow sphere structure is formed.
6 . The skin-attachable adhesive patch of claim 1 , wherein a hollow groove is formed in the substrate and between adjacent negative pressure chambers of the plurality of negative pressure chambers.