Synthesis of PF--PNIPAAm rod-coil block copolymers. Noted that P1: , and P2: , .
Schematic illustration of the chemical structure of amphiphilic diblock copolymer, PF--FNIPAAm, and its idealized conformations on hydrophilic and hydrophobic surfaces.
The comparison between the transition curve of the coarse-grained PNIPAAm DPD chain used in this work and the experimental coil-to-globule transition curve of PNIPAAM hydrogel.
Variation of optical transmittance with temperature . (a) P1; (b) P2.
Water contact angles (a) original quartz surface; (b) hydrophilically modified quartz surface; (c) hydrophobically modified quartz surface.
Water contact angles of surfaces coated with P1–0.5 (0.5 wt % in THF) (a) hydrophilically modified quartz surface; (b) hydrophobically modified quartz surface. The AFM images, simulation snapshots and schematic diagrams of the surfaces are also shown.
AFM micrographs of P1–1.0 films at different temperatures, (a) heating up and cooling down ; (b) ; (c) ; (d) 3D views at ; (e) 3D views at .
Morphology transition of the PF--PNIPAAm polymers due to breaking of the hydrogen bonds between PNIPAAm blocks and water molecules as temperature is higher than the LCST of PF--PNIPAAm block copolymer.
Simulated surface structures (3D and side views) and height statistics of rod-coil block copolymer films with the parameters of , , , and . The system volume is set to be .
(a) AFM micrographs of polymer films formed from P1–0.1 and P1–0.5 at various temperatures and simulation snapshots of at various . For simulation, the average domain size varies as increases the average domain size of and is set as basis for comparison (i.e., ). (b) The percentage of overall surface area taken by the rod aggregates vs .
(a) AFM images of polymer films formed from P1–0.1 and P1–1.0 at various temperatures (b) Experimental surface roughness of P1 films vs temperature .
(a) Simulation side views of at various where (b) simulation surface roughness of at various .
(a) The thickness of the polymer films are 5.4, 28.9, and 51.4 ran for P1–0.1, P1–0.5, and P1–1.0, respectively, (b) The thickness and simulated side views of rod-coil block copolymer films for with the parameters of , and . The system volume is set to be .
AFM micrographs of polymer films at . (a) P1–0.1; (b) P1–0.5; (c) P1–1.0 and the corresponding simulation snapshots for at (d) ; (e) ; (f) .
AFM micrograph of (a) P1–0.1 film, (b) P2–0.1 film, (c) P1–0.5 film, (d) P2–0.5 film, (e) Simulated surface top views of and copolymer films for different and , (f) Simulated surface side views of , and copolymer films at .
Water contact angles of P1 & P2 films. (a) P1–0.5 at ; (b) P1–0.5 at ; (c) P2–0.5 at ; (d) P2–0.5 at . Corresponding surface side views of simulations are also shown.
PL spectra of P1–1.0 polymer films in the temperature range of . (a): heating; (b): cooling process.
The repulsion parameters for the DPD particles.
PL characteristics of P1 polymer.
PL characteristics of P2 polymer.
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