2P1-M11 蚊の小顎を模倣したマイクロニードルの作製およびアンカー効果の検証(バイオミメティクス・バイオメカトロニクス)

概要

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This paper reports a fabrication of silicon jagged microneedle imitating mosquito's maxilla, which has a three-dimensionally sharp tip. The tip due to electrochemical etching is effective for easy insertion in the viewpoint of large stress concentration and small friction. An experiment of inserting the fabricated needle into an artificial skin of silicone rubber was carried out. During insertion, the resistance force was reduced compared to that of commercial needle. The rate of resistance force per inserting distance in case of jagged needle was smaller than that of straight needle, and vice versa during pulling it out. Assuming one central needle and two outer jagged needles, this experimental fact implies that the jagged shape is effective for inserting the outer needles easily and anchoring the outer needles while inserting the central needle. The cooperative motion of mosquito's jagged outer maxillas and straight central labrum supposedly takes advantage of the same mechanism.
一般社団法人日本機械学会の論文
2011-05-26