Digital light processing in a hybrid atomic force microscope: In Situ, nanoscale characterization of the printing process.
Digital light processing in a hybrid atomic force microscope: In Situ, nanoscale characterization of the printing process.
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混合原子力显微镜中的数字光处理：印刷过程的原位纳米级表征。
DOI：
10.1016/j.addma.2020.101744
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发表时间：
2021-03
影响因子：
11
通讯作者：
Killgore JP
中科院分区：
文献类型：
--
作者：
Higgins CI;Brown TE;Killgore JP
光固化成型（SLA）和数字光处理（DLP）是功能强大的增材制造技术，可解决包括再生医学、原型制作和制造在内的广泛应用。不幸的是，这些印刷工艺由于树脂吸收率、扩散率、反应动力学和在必要的曝光期间的溶胀而引入微米级各向异性不均匀性。以前，它一直不可能表征高分辨率的机械异质性，因为它在印刷过程中的发展。通过在混合仪器中将DLP 3D打印与原子力显微镜相结合，表征了单个原位打印体素的异质性。在这里，我们描述了该仪器并展示了在打印期间和打印后表征体素的三种模式。感测模态I映射刚打印的树脂浸入体素的机械特性，提供研究体素大小、打印曝光参数和体素-体素相互作用之间关系的框架。模态II捕获纳米原位工作曲线，是原位固化深度测量的第一个演示。模态III通过监测图案化期间树脂的粘弹性阻尼系数来动态地感测树脂中的局部流变变化。总的来说，该仪器为研究人员提供了一种工具，可以深入了解树脂开发，工艺优化和基本印刷限制。
Stereolithography (SLA) and digital light processing (DLP) are powerful additive manufacturing techniques that address a wide range of applications including regenerative medicine, prototyping, and manufacturing. Unfortunately, these printing processes introduce micrometer-scale anisotropic inhomogeneities due to the resin absorptivity, diffusivity, reaction kinetics, and swelling during the requisite photoexposure. Previously, it has not been possible to characterize high-resolution mechanical heterogeneity as it develops during the printing process. By combining DLP 3D printing with atomic force microscopy in a hybrid instrument, heterogeneity of a single, in situ printed voxel is characterized. Here, we describe the instrument and demonstrate three modalities for characterizing voxels during and after printing. Sensing Modality I maps the mechanical properties of just-printed, resin-immersed voxels, providing the framework to study the relationships between voxel sizes, print exposure parameters, and voxel-voxel interactions. Modality II captures the nanometric, in situ working curve and is the first demonstration of in situ cure depth measurement. Modality III dynamically senses local rheological changes in the resin by monitoring the viscoelastic damping coefficient of the resin during patterning. Overall, this instrument equips researchers with a tool to develop rich insight into resin development, process optimization, and fundamental printing limits.
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DOI：
10.1088/0960-1317/18/12/125014
发表时间：
2008-12-01
影响因子：
2.3
作者：
Stampfl, J.;Baudis, S.;Spitzbart, M.
通讯作者：
Spitzbart, M.
DOI：
10.1177/0954406220904106
发表时间：
2020-02-10
影响因子：
2
作者：
Saini, J. S.;Dowling, Luke;Trimble, Daniel
通讯作者：
Trimble, Daniel
DOI：
10.3390/ma10010064
发表时间：
2017-01-13
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Monzón M;Ortega Z;Hernández A;Paz R;Ortega F
通讯作者：
Ortega F
影响因子：
3.4
作者：
Zhao X
通讯作者：
Zhao X
影响因子：
10
作者：
Cui H;Nowicki M;Fisher JP;Zhang LG
通讯作者：
Zhang LG