TY - JOUR
T1 - 3D Printing of Cellulose Nanocrystal-Loaded Hydrogels through Rapid Fixation by Photopolymerization
AU - Kam, Doron
AU - Braner, Ariel
AU - Abouzglo, Avi
AU - Larush, Liraz
AU - Chiappone, Annalisa
AU - Shoseyov, Oded
AU - Magdassi, Shlomo
N1 - Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - New ink compositions for direct ink writing (DIW) printing of hydrogels, combining superior rheological properties of cellulose nanocrystals (CNCs) and a water-compatible photoinitiator, are presented. Rapid fixation was achieved by photopolymerization induced immediately after the printing of each layer by 365 nm light for 5 s, which overcame the common height limitation in DIW printing of hydrogels, and enabled the fabrication of objects with a high aspect ratio. CNCs imparted a unique rheological behavior, which was expressed by orders of magnitude difference in viscosity between low and high shear rates and in rapid high shear recovery, without compromising ink printability. Compared to the literature, the presented printing compositions enable the use of low photoinitiator concentrations at a very short build time, 6.25 s/mm, and are also curable by 405 nm light, which is favorable for maintaining viability in bioinks.
AB - New ink compositions for direct ink writing (DIW) printing of hydrogels, combining superior rheological properties of cellulose nanocrystals (CNCs) and a water-compatible photoinitiator, are presented. Rapid fixation was achieved by photopolymerization induced immediately after the printing of each layer by 365 nm light for 5 s, which overcame the common height limitation in DIW printing of hydrogels, and enabled the fabrication of objects with a high aspect ratio. CNCs imparted a unique rheological behavior, which was expressed by orders of magnitude difference in viscosity between low and high shear rates and in rapid high shear recovery, without compromising ink printability. Compared to the literature, the presented printing compositions enable the use of low photoinitiator concentrations at a very short build time, 6.25 s/mm, and are also curable by 405 nm light, which is favorable for maintaining viability in bioinks.
UR - http://www.scopus.com/inward/record.url?scp=85107391268&partnerID=8YFLogxK
U2 - 10.1021/acs.langmuir.1c00553
DO - 10.1021/acs.langmuir.1c00553
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C2 - 34008993
AN - SCOPUS:85107391268
SN - 0743-7463
VL - 37
SP - 6451
EP - 6458
JO - Langmuir
JF - Langmuir
IS - 21
ER -