Precipitation printing towards diverse materials, mechanical tailoring and functional devices
Precipitation printing towards diverse materials, mechanical tailoring and functional devices
复制标题
针对多种材料、机械剪裁和功能设备的沉淀印刷
DOI：
10.1016/j.addma.2020.101358
复制
发表时间：
2020
影响因子：
11
通讯作者：
Sodano, Henry A.
中科院分区：
文献类型：
--
作者：
Tu, Ruowen;Sprague, Ethan;Sodano, Henry A.
添加剂制造允许制造复杂的结构，这些结构很难通过传统的机械加工、挤出、注塑或吹塑工艺实现。目前的聚合物添加剂制造方法，如还原光聚合法、粉床熔融法、材料挤出法和粘结剂喷射法，对于可以进行3D打印的聚合物类型仍然存在限制。最近，一种新的基于溶液的聚合物添加剂的制造方法被开发出来，称为沉淀印刷，它是基于聚合物在两种相互相容的溶剂中的溶解度来印刷的。在这项工作中，进一步发展了沉淀打印技术，以扩大适用材料的范围，针对不同的热塑性塑料(聚偏氟乙烯(PVDF)和聚甲基丙烯酸甲酯(PMMA))、热固性橡胶(丁腈橡胶(NBR))和聚合物纳米复合材料(多壁碳纳米管(MWCNTs)-PVDF)。打印过程快速，能够实现具有复杂几何形状的大型结构，并能够以比材料挤压方法更高的分辨率进行打印，同时还可以制造分辨率大于100μm的微型结构。通过控制工艺参数，如溶剂/非溶剂对的选择、非溶剂的盐度和印刷温度，可以实现沉淀法印刷材料的孔隙率和力学性能的定制。此外，直接3D打印的NBR止回阀和MWCNTs-PVDF应变计的成功演示表明，沉淀打印作为一种有前途的一步法生产功能器件具有巨大的潜力。
Additive manufacturing allows for the fabrication of complex structures which are hard to achieve through conventional machining, extrusion, injection molding or blow molding processes. Current additive manufacturing methods for polymers, such as vat photopolymerization, powder bed fusion, material extrusion and binder jetting, still have limitations on the types of polymers that can be 3D printed. Recently, a novel solution-based polymer additive manufacturing method, termed precipitation printing, is developed which is based on the solubility of the polymer being printed in two mutually miscible solvents. In this work, the precipitation printing technique is further developed to expand the range of applicable materials, towards different thermoplastics (poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA)), thermoset rubber (acrylonitrile butadiene rubber (NBR)) and polymer nanocomposites (multiwalled carbon nanotubes (MWCNTs)-PVDF). The printing process is rapid and enables the realization of large structures with complex geometries as well as printing at a higher resolution than the material extrusion method, while also allowing the fabrication of micro-scale structures with greater than 100 μm resolution. Porosity and mechanical property tailoring of the precipitation printed materials are achievable through the control of process parameters, such as solvent/non-solvent pair selection, salinity of the non-solvent and printing temperature. In addition, the successful demonstrations of a directly 3D printed NBR check valve and a MWCNTs-PVDF strain gauge indicate the great potential for precipitation printing as a promising one-step process for the production of functional devices.
退火温度对PVDF厚膜介电行为的影响
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
Shobhneek Kaur;D. Singh
通讯作者：
D. Singh
影响因子：
--
作者：
Pfister, A;Landers, R;Mülhaupt, R
通讯作者：
Mülhaupt, R