Supplementary Information files for The effect of print speed and material aging on the mechanical properties of a self-healing nanocomposite hydrogel

Supplementary Information files for The effect of print speed and material aging on the mechanical properties of a self-healing nanocomposite hydrogelA UV-curable nanoclay-zwitterionic hydrogel is synthesised and evaluated though rheological and mechanical testing. The result shows that aging time of the pre-gel have a big impact on storage and loss of modulus which both increases with increasing aging time, particularly in the first 48 h. The pre-gel is successfully printed and is shown to be able to support itself making it possible to fully print structures before curing. Compression and tensile samples are printed and compared to cast samples. The pre-gel aging time showed that an increased time resulted in a lower strain at failure for both casted and extruded samples. However, when printing with a speed of 10 mm/s with UV-curing during printing, a significant increase in strain at failure is achieved. Furthermore, the compressed samples display self-healing abilities at room temperature and almost completely returns to its original state before compression occurred.

附加信息文件：打印速度和材料老化对自修复纳米复合水凝胶机械性能的影响。通过流变性和力学测试，合成了并评估了一种紫外线可固化纳米粘土-两性离子水凝胶。结果显示，预凝胶的老化时间对存储模量和损耗模量的影响显著，两者均随老化时间的增加而增大，尤其在最初的48小时内。预凝胶成功打印，并显示出能够自我支撑的特性，使得在固化前能够完全打印结构。压缩和拉伸样品被打印并与浇注样品进行比较。预凝胶的老化时间表明，老化时间的增加导致浇注和挤出样品的失效应变降低。然而，当以10 mm/s的速度打印并在此过程中进行紫外线固化时，失效应变显著增加。此外，压缩样品在室温下显示出自修复能力，并在压缩发生之前几乎完全恢复至原始状态。