Ultrasound freeze casting: Fabricating bioinspired porous scaffolds through combining freeze casting and ultrasound directed self-assembly
Ultrasound freeze casting: Fabricating bioinspired porous scaffolds through combining freeze casting and ultrasound directed self-assembly
复制标题
超声冷冻铸造：通过结合冷冻铸造和超声引导自组装来制造仿生多孔支架
DOI：
10.1016/j.matdes.2018.107561
复制
发表时间：
2019
影响因子：
8.4
通讯作者：
Naleway, Steven E.
中科院分区：
文献类型：
--
作者：
Ogden, Taylor A.;Prisbrey, Milo;Nelson, Isaac;Raeymaekers, Bart;Naleway, Steven E.
轻质多孔工程材料在广泛的研究领域中是有利的，因为它们将期望的机械性能与利用其多孔结构的能力相结合。用于制造多孔材料结构的现有技术受到材料选择的限制，需要多个步骤和/或额外的后处理以在材料结构内产生不同材料性质的区域，并且不容易扩展。相比之下，我们实施和表征的制造过程中，宏观多孔工程材料样品与用户指定的微观结构，通过结合冷冻铸造，这使得制造的多孔材料样品，与超声引导的自组装，这使得控制的多孔材料的微观结构。我们将这一过程称为“超声冷冻铸造（UFC）”，并利用它来制造仿生材料，模仿天然材料的同心环，如骨单位和Liesegang环。具体来说，我们采用UFC工艺来创建材料样品，其中有三个，四个和五个交替的致密和多孔TiO 2材料的同心环。我们发现统计学显着差异的孔隙率和维氏硬度时，比较多孔和致密区域的材料样品。这些结果将为制备具有用户指定微观结构的多孔工程材料提供一条新的途径。
Lightweight porous engineered materials are advantageous in a broad range of research fields because they combine desirable mechanical properties with the ability to leverage their porous structure. Existing techniques for fabricating porous material structures are limited by material choice, require multiple steps, and/or additional post-processing to create regions of varying material properties within the material structure, and are not easily scalable. In contrast, we implement and characterize a fabrication process for macroscale porous engineered material samples with a user-specified microstructure, by combining freeze casting, which allows fabrication of porous materials samples, with ultrasound directed self-assembly, which allows controlling the microstructure of the porous materials. We refer to this process as “ultrasound freeze casting (UFC),” and employ it to fabricate bioinspired materials that mimic the concentric rings of natural materials such as osteons and Liesegang rings. Specifically, we employ the UFC process to create material samples with three, four, and five concentric rings of alternating dense and porous TiO2material. We find statistically significant differences of both the porosity and Vickers hardness when comparing the porous and dense regions of the material samples. These results will provide a new pathway to fabricate porous engineered materials with user-specified microstructure.
登录
查看更多内容
DOI：
10.3390/ma10040367
发表时间：
2017-03-31
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Lee H;Jang TS;Song J;Kim HE;Jung HD
通讯作者：
Jung HD
影响因子：
9.4
作者：
S. Wilke;D. Dunand
通讯作者：
S. Wilke;D. Dunand
影响因子：
9.7
作者：
Grunenfelder, L. K.;Suksangpanya, N.;Kisailus, D.
通讯作者：
Kisailus, D.
冷冻条件对冷冻铸造制备的微米级颗粒β-磷酸三钙/莰烯支架的影响。
影响因子：
3.9
作者：
Gurdev Singh;S. Soundarapandian
通讯作者：
S. Soundarapandian