Abstract:Three-dimensional (3D) printed hydrogels fabricated using light processing techniques are poised to replace conventional processing methods used in tissue engineering and organ-on-chip devices. An intrinsic potential problem remains related to structural heterogeneity translated in the degree of cross-linking of the printed layers. Poly(ethylene glycol) diacrylate (PEGDA) hydrogels were used to fabricate both 3D printed multilayer and control monolithic samples, which were then analyzed using atomic force micr… Show more
“…Our measurements showed that the stiffness of our hydrogels was reduced in comparison with our bulk studies, which is consistent with literature observations that show that the mechanics of printed PEGDA hydrogels are not homogeneous across printed layers and that the layers farthest from the light source—the surface we probe with AFM—will be the softest. 56 Despite the lower stiffnesses, our results still show that we can control the mechanical properties through PEGDA concentration.…”
“…Our measurements showed that the stiffness of our hydrogels was reduced in comparison with our bulk studies, which is consistent with literature observations that show that the mechanics of printed PEGDA hydrogels are not homogeneous across printed layers and that the layers farthest from the light source—the surface we probe with AFM—will be the softest. 56 Despite the lower stiffnesses, our results still show that we can control the mechanical properties through PEGDA concentration.…”
“…Such 3D-printed objects with a considerable difference in mechanical properties from top to bottom provide an interesting platform to understand the behavior of the biological cells and tissues when are in contact. 70 The engineered mechanical properties of these structures can be helpful for the selective promotion or repulsion of biological tissues via cell integration and attachment to the surface.…”
The synthesis of PVA hydrogels (PVA-Hy) requires a high-concentration alkali solution (e.g., sodium hydroxide, NaOH, 14% w/w, 4.2 M), and the rapid physical crosslinking of PVA makes it challenging to...
“…It has been shown that Na + is strongly related to impedance matching in studies of PPSM hydrogels. 51–53 As SA molecules dissociate into negatively charged ions in water, these ions diffuse and are subsequently attracted to positively charged ions. Based on this trait, the inclusion of monovalent cations (Na + ) prompted the self-assembly of SA.…”
This paper describes the preparation of an environmentally friendly and biodegradable hydrogel type electromagnetic shielding material by using common salt to induce the self-assembly of sodium alginate.
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