TY - JOUR
T1 - Design of a metamaterial film with excellent conformability and adhesion for bandage substrates
AU - Wang, Haotian
AU - Pan, Chen
AU - Zhao, Haiyuan
AU - Wang, Tingyu
AU - Han, Yafeng
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12
Y1 - 2021/12
N2 - Developing films with excellent conformability and adhesion has become a research hotspot in many fields, such as medical bandages. The conventional method for enhancing films conformability and adhesion is to make the films thinner or modify the material of the films, which usually compromises the function of the films. In this paper, a novel metamaterial film was proposed to cover the skin area of a human elbow during the rotation of elbow. This structure is composed of unit cells with rectangular perforations, whose Poisson's ratio (PR) is determined by the length of the perforation. With finite element analysis (FEA), relations among the stretch strain, Poisson's ratio and length of the perforation of unit cell was obtained. Then, the proposed film was generated by mapping unit cells with different PR to the target skin surface. With the same deformation behavior as the elbow skin, conformability and adhesion of the generated film can be guaranteed during the entire rotation process of the elbow, which has been verified by both FEA and experimental tests. Theoretically, by changing the arrangement of different PR unit cells, the proposed method can be applied to design films for other complex surface on human body. It also provides a new way to introduce materials with better biocompatibility but poor mechanical properties as bandage substrates. As a possible application, a prototype of smart bandage was developed by installing a high-resolution temperature sensor on the proposed film, which can monitor the inflammation of the wounded skin in real time.
AB - Developing films with excellent conformability and adhesion has become a research hotspot in many fields, such as medical bandages. The conventional method for enhancing films conformability and adhesion is to make the films thinner or modify the material of the films, which usually compromises the function of the films. In this paper, a novel metamaterial film was proposed to cover the skin area of a human elbow during the rotation of elbow. This structure is composed of unit cells with rectangular perforations, whose Poisson's ratio (PR) is determined by the length of the perforation. With finite element analysis (FEA), relations among the stretch strain, Poisson's ratio and length of the perforation of unit cell was obtained. Then, the proposed film was generated by mapping unit cells with different PR to the target skin surface. With the same deformation behavior as the elbow skin, conformability and adhesion of the generated film can be guaranteed during the entire rotation process of the elbow, which has been verified by both FEA and experimental tests. Theoretically, by changing the arrangement of different PR unit cells, the proposed method can be applied to design films for other complex surface on human body. It also provides a new way to introduce materials with better biocompatibility but poor mechanical properties as bandage substrates. As a possible application, a prototype of smart bandage was developed by installing a high-resolution temperature sensor on the proposed film, which can monitor the inflammation of the wounded skin in real time.
KW - Conformability and adhesion
KW - Metamaterial film
KW - Nonuniform Poisson's ratio distribution
KW - Smart bandage
UR - http://www.scopus.com/inward/record.url?scp=85114957731&partnerID=8YFLogxK
U2 - 10.1016/j.jmbbm.2021.104799
DO - 10.1016/j.jmbbm.2021.104799
M3 - Article
C2 - 34536800
AN - SCOPUS:85114957731
SN - 1751-6161
VL - 124
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
M1 - 104799
ER -