Title | Optical stereolithography of antifouling zwitterionic hydrogels. |
Publication Type | Journal Article |
Year of Publication | 2019 |
Authors | Pan W, Wallin TJ, Odent J, Yip MC, Mosadegh B, Shepherd RF, Giannelis EP |
Journal | J Mater Chem B |
Volume | 7 |
Issue | 17 |
Pagination | 2855-2864 |
Date Published | 2019 05 07 |
ISSN | 2050-7518 |
Keywords | Biocompatible Materials, Humans, Hydrogels, Stereolithography |
Abstract | This paper reports the rapid 3D printing of tough (toughness, U, up to 141.6 kJ m), highly solvated (φ∼ 60 v/o), and antifouling hybrid hydrogels for potential uses in biomedical, smart materials, and sensor applications, using a zwitterionic photochemistry compatible with stereolithography (SLA). A Design of Experiments (DOE) framework was used for systematically investigating the multivariate photochemistry of SLA generally and, specifically, to determine an aqueous SLA system with an additional zwitterionic acrylate, which significantly increases the gelation rate, and the resilience of the resulting hybrid hydrogels relative to an equivalent non-ionic polyacrylamide hydrogel. Specifically, the resulting zwitterionic hybrid hydrogels (Z-gels) can be tuned over a large range of ultimate strains, ca. 0.5 < γ < 5.0, and elastic moduli, ca. 10 < E < 1000 kPa, while also demonstrating a high resilience under cyclic tensile loading. Importantly, unlike traditional chemistry, increasing the elastic modulus of the Z-gels does not necessarily reduce the ultimate strain. Moreover, the Z-gels can be rapidly printed using a desktop commercial SLA 3D printer, with relatively low photoirradiation dosages of visible light (135 to 675 mJ cm per 50-100 μm layer). Compared with the counterpart polyacrylamide hydrogels, the Z-gels have greater antifouling properties and exhibit 58.2% less absorption of bovine serum albumin. |
DOI | 10.1039/c9tb00278b |
Alternate Journal | J Mater Chem B |
PubMed ID | 32255088 |
Related Institute:
Dalio Institute of Cardiovascular Imaging (Dalio ICI)