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Direct Ink Writing Based 4D Printing of Materials and Their Applications.
Advanced Science ( IF 15.1 ) Pub Date : 2020-06-29 , DOI: 10.1002/advs.202001000
Xue Wan 1 , Lan Luo 1 , Yanju Liu 2 , Jinsong Leng 1
Affiliation  

4D printing has attracted academic interest in the recent years because it endows static printed structures with dynamic properties with the change of time. The shapes, functionalities, or properties of the 4D printed objects could alter under various stimuli such as heat, light, electric, and magnetic field. Briefly, 4D printing is the development of 3D printing with the fourth dimension of time. Among the fabrication techniques that have been employed for 4D printing, the direct ink writing technique shows superiority due to its open source for various types of materials. Herein, the state‐of‐the‐art achievements about the topic of 4D printing through direct ink writing are summarized. The types of materials, printing strategies, actuated methods, and their potential applications are discussed in detail. To date, most efforts have been devoted to shape‐shifting materials, including shape memory polymers, hydrogels, and liquid crystal elastomers, showing great prospects in areas ranging from the biomedical field to robotics. Finally, the current challenges and outlook toward 4D printing based on direct ink writing are also pointed out to leave open a significant space for future innovation.

中文翻译:

基于直接墨水书写的材料 4D 打印及其应用。

4D打印近年来引起了学术界的兴趣,因为它赋予静态打印结构随时间变化的动态特性。4D 打印物体的形状、功能或属性可能会在热、光、电场和磁场等各种刺激下发生变化。简单来说,4D打印是在时间第四维度3D打印的发展。在4D打印所采用的制造技术中,直接墨水书写技术由于其对各种类型材料的开源而显示出优越性。本文总结了通过直接墨水书写进行 4D 打印这一主题的最新成果。详细讨论了材料类型、打印策略、驱动方法及其潜在应用。迄今为止,大多数努力都集中在变形材料上,包括形状记忆聚合物、水凝胶和液晶弹性体,在从生物医学领域到机器人领域都显示出巨大的前景。最后,还指出了基于直接墨水书写的4D打印目前面临的挑战和前景,为未来的创新留下了重要的空间。
更新日期:2020-08-19
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