Wu Jumiati, Lee Wei Li, Low Hong Yee
Digital Manufacturing and Design Centre (DManD) Engineering Product Development (EPD) Singapore University of Technology and Design 8 Somapah Road 487372 Singapore.
Glob Chall. 2018 Dec 3;3(5):1800083. doi: 10.1002/gch2.201800083. eCollection 2019 May.
High-resolution surface patterning has garnered interests as a nonchemical-based surface engineering approach for creating functional surfaces. Applications in consumer products, parts for transportation vehicles, optics, and biomedical technologies demand topographic patterning on 3D net shape objects. Through a hybrid approach, high-resolution surface texture is incorporated onto 3D-printed polymers via direct thermal nanoimprinting process. The synergy of geometry design freedom in 3D printing and the high spatial resolution in nanoimprinting is demonstrated to be a versatile fabrication of high-fidelity surface pattern (from 2 µm to 200 nm resolution) on convex, concave semicylindrical, and hemispherical objects spanning a range of surface curvatures. The novel hybrid fabrication is further extended to achieve a high-resolution curved mold insert for rapid prototyping via injection molding. The versatility of the fabrication strategies reported here not only provides a post-3D printing process that enhances the surface properties of 3D-printed objects but also opens a new pathway to enable future study on the effects of combining microscale and nanoscale surface texture with macroscopic curvature. Both have been known, individually, as an effective approach to tune surface functionalities.
高分辨率表面图案化作为一种用于创建功能表面的非化学基表面工程方法，已引起人们的关注。在消费品、运输车辆部件、光学和生物医学技术中的应用需要在三维净形物体上进行地形图案化。通过一种混合方法，通过直接热纳米压印工艺将高分辨率表面纹理结合到3D打印聚合物上。3D打印中的几何设计自由度与纳米压印中的高空间分辨率相结合，被证明是一种在具有一系列表面曲率的凸形、凹形半圆柱形和半球形物体上制造高保真表面图案（分辨率从2微米到200纳米）的通用方法。这种新颖的混合制造方法进一步扩展到通过注塑成型实现用于快速成型的高分辨率曲面模具镶件。本文报道的制造策略的通用性不仅提供了一种3D打印后处理工艺，可增强3D打印物体的表面性能，还开辟了一条新途径，以便未来研究将微观和纳米尺度表面纹理与宏观曲率相结合的效果。单独来看，这两者都被认为是调节表面功能的有效方法。
