Core-shell polymeric microcapsules with superior thermal and solvent stability.
A protective polydopamine (PDA) coating is applied to core-shell microcapsule surfaces by the polymerization of dopamine monomers. A neutral aqueous solution and the addition of an oxidant (i.e., ammonium persulfate) are crucial for microcapsule survival and the initiation of PDA polymerization, respectively. The resulting PDA coating is a dense and uniform layer approximately 50 nm thick. The PDA protective coating significantly increases capsule stability at an elevated temperature (180 °C) and in a variety of organic solvents and acidic/basic solutions that otherwise lead to deflation and loss of the core content of uncoated microcapsules.
†Beckman Institute for Advanced Science and Technology, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
Sen
S
Kang
‡Beckman Institute for Advanced Science and Technology, Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
Marta
M
Baginska
‡Beckman Institute for Advanced Science and Technology, Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
Scott R
SR
White
†Beckman Institute for Advanced Science and Technology, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
Nancy R
NR
Sottos
D040761:Biomimetic Materials / Q000737:chemistry*; D002214:Capsules / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D004355:Drug Stability; D006358:Hot Temperature; D007211:Indoles / Q000737:chemistry*; D008422:Materials Testing; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D012997:Solvents / Q000737:chemistry*
D002214:Capsules; D020099:Coated Materials, Biocompatible; D007211:Indoles; D011108:Polymers; D012997:Solvents; C568283:polydopamine
microcapsules; polydopamine; solvent stability; thermal stability