TY - JOUR
T1 - Programmable Porous Polymers via Direct Bubble Writing with Surfactant-Free Inks
AU - Amato, Dahlia N.
AU - Amato, Douglas V.
AU - Sandoz, Michael
AU - Weigand, Jeremy
AU - Patton, Derek L.
AU - Visser, Claas Willem
N1 - ACS deal
PY - 2020/9/16
Y1 - 2020/9/16
N2 - Fabrication of macroporous polymers with functionally graded architecture or chemistry bears transformative potential in acoustic damping, energy storage materials, flexible electronics, and filtration but is hardly reachable with current processes. Here, we introduce thiol-ene chemistries in direct bubble writing, a recent technique for additive manufacturing of foams with locally controlled cell size, density, and macroscopic shape. Surfactant-free and solvent-free graded three-dimensional (3D) foams without drying-induced shrinkage were fabricated by direct bubble writing at an unparalleled ink viscosity of 410 cP (40 times higher than previous formulations). Functionalities including shape memory, high glass transition temperatures (>25 °C), and chemical gradients were demonstrated. These results extend direct bubble writing from aqueous inks to nonaqueous formulations at high liquid flow rates (3 mL min-1). Altogether, direct bubble writing with thiol-ene inks promises rapid one-step fabrication of functional materials with locally controlled gradients in the chemical, mechanical, and architectural domains.
AB - Fabrication of macroporous polymers with functionally graded architecture or chemistry bears transformative potential in acoustic damping, energy storage materials, flexible electronics, and filtration but is hardly reachable with current processes. Here, we introduce thiol-ene chemistries in direct bubble writing, a recent technique for additive manufacturing of foams with locally controlled cell size, density, and macroscopic shape. Surfactant-free and solvent-free graded three-dimensional (3D) foams without drying-induced shrinkage were fabricated by direct bubble writing at an unparalleled ink viscosity of 410 cP (40 times higher than previous formulations). Functionalities including shape memory, high glass transition temperatures (>25 °C), and chemical gradients were demonstrated. These results extend direct bubble writing from aqueous inks to nonaqueous formulations at high liquid flow rates (3 mL min-1). Altogether, direct bubble writing with thiol-ene inks promises rapid one-step fabrication of functional materials with locally controlled gradients in the chemical, mechanical, and architectural domains.
KW - UT-Hybrid-D
KW - functionally graded materials
KW - nonaqueous foam
KW - polymer foams
KW - thiol-ene
KW - 3D printing
UR - http://www.scopus.com/inward/record.url?scp=85091191962&partnerID=8YFLogxK
U2 - 10.1021/acsami.0c07945
DO - 10.1021/acsami.0c07945
M3 - Article
C2 - 32805865
AN - SCOPUS:85091191962
SN - 1944-8244
VL - 12
SP - 42048
EP - 42055
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 37
ER -