Fecha de publicación: 08/11/2024 Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE Synthesis of bio-based TPU and applications in FDM 3D printing.


Abstract
Bio-based polymeric materials have recently gained popularity due to their unique properties, including environmental friendliness, biodegradability, and sustainability. In this study, the bio-based TPUs were successfully synthesized by one-shot polymerization method, utilizing 100% bio-based polytrimethylene ether glycol (PO3G) as polyols, 71% bio-based 1,5-pentamethylene diisocyanate (PDI) as isocyanates, and 100% bio-based 1,4-butanediol BDO as chain extenders. The as-prepared TPUs, which contained up to 92% bio-based material were investigated using a variety of analytical methods, including morphological investigations, mechanical testing, thermal analysis, rheological behavior, docking analysis, and cytotoxicity studies. For PPB 3 (1:3:2), PPB 4 (1:4:3), PPB 5 (1:5:4), and PPB 7 (1:7:6), the initial modulus values were 78, 151, 194, and 314 GPa, and the shore-A hardness values were 92, 93, 93, and 94. Additionally, a notable variation in the degree of phase separation (DPS) of 0.575, 0.647, 0.716, and, 0.738 between hard segment (HS) and soft segment (SS) was noticed among synthesized bio-based TPUs and an increase in DPS with higher molar ratios corresponded to a higher content of HS. Besides, the bio-based TPU proved outstanding cell viability results, representing its potential appropriateness for various biomedical applications. Eventually, docking simulations were shown in silico to evaluate the interaction of bio-based TPU with the DNA gyrase enzyme. Furthermore, the results of bio-based TPUs demonstrated excellent applications in the production of 3D printing using FDM. We effectively prepared 3D printing to provide a viable answer to environmental concerns.