https://scholars.lib.ntu.edu.tw/handle/123456789/576129
標題: | Fabrication and compressive behavior of a micro?lattice composite by high resolution dlp stereolithography | 作者: | Shin C.S Chang Y.C. CHOW-SHING SHIN |
關鍵字: | Electroless plating; Fabrication; Stiffness; Stochastic systems; Compressive stiffness; Constituent materials; Digital light processing; Electroless plating of nickel; Hierarchical structures; Photon polymerization; Strength and stiffness; Structural stiffness; Biomechanics | 公開日期: | 2021 | 卷: | 13 | 期: | 5 | 起(迄)頁: | 1-17 | 來源出版物: | Polymers | 摘要: | Lattice structures are superior to stochastic foams in mechanical properties and are finding increasing applications. Their properties can be tailored in a wide range through adjusting the design and dimensions of the unit cell, changing the constituent materials as well as forming into hierarchical structures. In order to achieve more levels of hierarchy, the dimensions of the fundamental lattice have to be small enough. Although lattice size of several microns can be fabricated using the two?photon polymerization technique, sophisticated and costly equipment is required. To balance cost and performance, a low?cost high resolution micro?stereolithographic system has been developed in this work based on a commercial digital light processing (DLP) projector. Unit cell lengths as small as 100 μm have been successfully fabricated. Decreasing the unit cell size from 150 to 100 μm increased the compressive stiffness by 26%. Different pretreatments to facilitate the electroless plating of nickel on the lattice structure have been attempted. A pretreatment of dip coating in a graphene suspension is the most successful and increased the strength and stiffness by 5.3 and 3.6 times, respectively. Even a very light and incomplete nickel plating in the interior has increase the structural stiffness and strength by more than twofold. ? 2021 by the author. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102660387&doi=10.3390%2fpolym13050785&partnerID=40&md5=955f420b10100b561792e93312dbb54c https://scholars.lib.ntu.edu.tw/handle/123456789/576129 |
ISSN: | 20734360 | DOI: | 10.3390/polym13050785 |
顯示於: | 機械工程學系 |
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