Liquid bridge microstereolithography
Liquid bridge microstereolithography
复制标题
液桥微立体光刻
DOI：
10.1016/j.addma.2018.02.012
复制
发表时间：
2018
影响因子：
11
通讯作者：
Choi, Jae-Won
中科院分区：
文献类型：
--
作者：
Lee, Jeongwoo;Lu, Yanfeng;Kashyap, Sumanth;Alarmdari, Aslan;Emon, Md. Omar;Choi, Jae-Won
微立体光刻（MSL）已被用于创建用于广泛应用的3D微结构。尽管使用该方法具有许多优点，但仍存在若干缺点，例如与待构建的微结构的体积相比需要使用大量的材料、氧抑制以及难以处理高粘性光聚合物。为了最小化所需材料的量，已经建议使用液桥作为对现有微立体光刻工艺的修改。在自然界中，降雨后很容易发现液体桥。基本上，可以在两个固体之间形成桥，其中表面张力可以维持液体桥对抗倾向于破坏它的重力。利用这种自然现象，可以在两个基底之间有意地形成光聚合物：具有低表面能的透明衬底可用作顶部衬底，而具有较高表面能的另一衬底可用于将所制造的结构保持在一起。这种方法，称为液桥微立体光刻（LBMSL），是有利的，因为它使用了相对少量的材料，消除了由于材料表面的约束氧抑制，并提供了利用高粘度材料的可能性。本文采用数学模型对一定体积和高度的液桥进行了模拟。完成粘附性测试以确保制造的层从顶部基板分离，同时制造的结构保持附接到底部结构。将不同粘度的光聚合物用于LBMSL，并与传统的MSL进行了比较。最后，各种3D微结构制造LBMSL，这些制造的微结构提供了令人信服的证据，LBMSL是优于现有的MSL工艺。
Microstereolithography (MSL) has been employed to create 3D microstructures for a wide range of applications. Despite the many advantages of using this process, there are still several drawbacks such as the need to use a large amount of a material compared to the volume of the microstructure to be built, oxygen inhibition, and difficulty in processing highly viscous photopolymers. To minimize the amount of material required, the use of a liquid bridge has been suggested as a modification to the existing microstereolithography process. A liquid bridge can be easily found in nature after a rainfall. Basically, a bridge can be formed between two solid bodies, where surface tension can sustain a liquid bridge against a gravitational force, which tends to destroy it. With this natural phenomenon, a photopolymer can be intentionally formed between two substrates: a transparent substrate with a low surface energy can be used as a top substrate, while another substrate with a higher surface energy can be used to hold the fabricated structure together. This process, calledliquid bridge microstereolithography(LBMSL), is advantageous since it uses a relatively small amount of a material, removes oxygen inhibition due to the constraint of the material surface, and offers the possibility of utilizing a highly viscous material. In this study, a mathematical model was taken to simulate a liquid bridge with a certain volume and height. Adhesion tests were accomplished to ensure the fabricated layer detaches from the top substrate while the fabricated structure remains attached to the bottom structure. Photopolymers with different viscosities were employed in LBMSL, and the results were compared with those in the traditional MSL. Finally, various 3D microstructures were fabricated by LBMSL; these fabricated microstructures provide compelling evidence that LBMSL is advantageous over the existing process for MSL.
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发表时间：
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影响因子：
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