Xu Kang, Li Dongya, Shang Erwei, Liu Yu
School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China.
Jiangsu Key Lab of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, China.
Polymers (Basel). 2022 Mar 24;14(7):1323. doi: 10.3390/polym14071323.
In response to the fact that most of the current research on silicone 3D printing suffers from structure collapse and dimensional mismatch, this paper proposes a heating-assisted direct writing printing method for commercial silicone rubber materials for preparing silicone foam with enhanced fidelity. In the experimental processes, the effects of substrate temperature, printing pressure, and printing speed on the filament width were investigated using a controlled variable method. The results showed the following: (1) the diameter of silicone rubber filaments was positively correlated with the printing pressure and substrate temperature, but negatively correlated with the printing speed; (2) the filament collapse of the large filament spaced foams was significantly improved by the addition of the thermal field, which, in turn, improved the mechanical properties and manufacturing stability of the silicon foams. The heating-assisted direct writing process in this paper can facilitate the development of the field of microelectronics and the direct printing of biomaterials.
针对当前大多数关于硅胶3D打印的研究存在结构坍塌和尺寸不匹配的问题，本文提出了一种用于商业硅橡胶材料的加热辅助直写打印方法，以制备具有更高保真度的硅泡沫材料。在实验过程中，采用控制变量法研究了基板温度、打印压力和打印速度对细丝宽度的影响。结果表明：（1）硅橡胶细丝的直径与打印压力和基板温度呈正相关，但与打印速度呈负相关；（2）通过添加热场，大细丝间距泡沫的细丝坍塌得到了显著改善，进而提高了硅泡沫的机械性能和制造稳定性。本文中的加热辅助直写工艺有助于微电子领域的发展以及生物材料的直接打印。
