3D Printing of Anisotropic Multimaterial Structures using Acoustic Streaming-assisted Two-Photon Polymerization
3D Printing of Anisotropic Multimaterial Structures using Acoustic Streaming-assisted Two-Photon Polymerization
复制标题
使用声流辅助双光子聚合 3D 打印各向异性多材料结构
DOI：
10.1016/j.mfglet.2022.07.080
复制
发表时间：
2022
影响因子：
3.9
通讯作者：
Pan, Yayue
中科院分区：
文献类型：
--
作者：
Lichade, Ketki M.;Pan, Yayue
近年来，各向异性多材料结构由于具有可调的各向异性物理性质，在各种应用领域得到了广泛的研究。这些产品创新面临的一个重大挑战是，在精确的拓扑和化学成分控制下，制造所需的各向异性多材料结构的制造技术选择有限。本研究报告了一种新的制造方法，声流辅助双光子聚合（AS-TPP），通过在纳米和微观尺度上集成逐层印刷和声流辅助颗粒图案来制造各向异性多材料结构。为了研究该方法的有效性，采用传统的TPP技术和这种新颖的AS-TPP技术制备了一组具有不同拓扑结构和材料组成的结构。对制备的样品进行扫描电镜（SEM）和能谱分析（EDS），验证了AS-TPP工艺在几何形状和材料成分控制方面的准确性。实验结果验证了新型AS-TPP工艺在材料图案、表面结构和各向异性生产方面的制造能力。为了证明可能的应用，测量和比较了印刷样品的各向异性润湿性和集水能力。AS-TPP制备的具有沟槽表面的各向异性多材料结构的集水效率比具有平坦光滑表面的各向同性单材料结构的集水效率高3倍。这项工作暗示了as - tpp技术在生产具有先进形状和材料设计的材料或器件方面的巨大潜力，可用于微流体，光学，功能表面涂层，细胞筛选和生物医学设备等各种应用。
Recently, many studies have investigated anisotropic multimaterial structures for their potential in various applications, thanks to their tunable anisotropic physical properties. A significant challenge in these product innovations is the limited choices of manufacturing technologies for fabricating the desired anisotropic multimaterial structures with precise topological and chemical composition control. This study reports a new manufacturing method, Acoustic-Streaming-assisted Two-Photon Polymerization (AS-TPP), for fabricating anisotropic multimaterial structures through integrating layer-by-layer printing and acoustic-streaming-assisted particle patterning at a nano-and micro-scale. To study the effectiveness of this method, a set of structures with different topology and material compositions is fabricated using the conventional TPP technique and this novel AS-TPP technique. The scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS) analysis of the fabricated samples validated the accuracy of the AS-TPP process in the geometry and material composition control. Experimental results validated the manufacturing capability of the novel AS-TPP process in terms of material patterning, surface structuring, and anisotropy production. To demonstrate possible applications, the anisotropic wettability and water collection capability of the printed samples were measured and compared. The water collection efficiency of the anisotropic multimaterial structure with groove surface fabricated by AS-TPP was three times higher than that of the isotropic singlematerial structure with flat smooth surface. This work implied the great potential of the AS-TPP technique for the productions of materials or devices with advanced shape and material designs for various applications such as microfluidics, optics, functional surface coating, cell screening, and biomedical devices.