TY - JOUR UR - http://dx.doi.org/10.1016/j.ijbiomac.2024.137253 TI - Extraction of type I collagen and development of collagen methacryloyl (ColMA)/PEGDA ink for digital light processing printing KW - Ink KW - Digital light processing KW - Additive manufacturing KW - Collagen KW - Hydrogel KW - Biomedical engineering N1 - © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). SN - 0141-8130 ID - discovery10200127 AV - public JF - International Journal of Biological Macromolecules IS - 6 N2 - The fabrication of three-dimensional (3D) biostructures through additive manufacturing relies on the critical role of ink development. With the growing demand for high-resolution manufacturing, digital light processing (DLP) technology has emerged as a promising technique requiring specialised photosensitive inks. Although gelatine methacryloyl (GelMA) has been the primary option for DLP, its mechanical properties, biocompatibility, and low stability still present limitations. The development of collagen-based ink is thus in high demand for a wider stiffness adjustment range, native bioactivities, and versatility in biomedical engineering applications. In this paper, we report a rapid and low-cost protocol for collagen methacryloyl (ColMA)/poly(ethylene glycol) diacrylate (PEGDA) ink for DLP printing. The ink demonstrated the highest printing resolution of ?50 ?m by using 405 nm visible light. The printability, mechanical properties and cell viability of the DLP-printed ColMA/PEGDA structures were comprehensively evaluated. The printed ColMA/PEGDA structures reached a compressive modulus over 100 kPa with 0.6 wt% collagen. The printed ColMA/PEGDA scaffolds promoted the attachment and proliferation of 3 T3 fibroblasts, demonstrating their potential in future applications in biomedical engineering. PB - Elsevier BV VL - 282 A1 - Han, Kunyuan A1 - Cheng, Yunzhang A1 - Han, Qinglin A1 - Chen, Jishizhan Y1 - 2024/12// ER -