Table 2.
Characterization of mixed polymer brushes. Molecular weight, zeta potential, and contact angle.
| Code | Polymer type | NIPAAm conc. (mM) | Mna | Mw/Mna | DMAPAAm conc. (mM) | Mnb | Zeta potential (mV)c |
Contact angle (°)d |
||
|---|---|---|---|---|---|---|---|---|---|---|
| 37 °C | 20 °C | 37°C | 20 °C | |||||||
| PN | PNIPAAm | 857 | 10,000 | 1.34 | – | – | −0.40 | −0.42 | 70.0 ± 0.0 | 64.0 ± 1.7 |
| PN-PD-0 | PNIPAAm and amino group | 857 | 10,000 | 1.07 | – | – | 0.19 | 0.50 | 79.0 ± 2.6 | 85.7 ± 2.6 |
| PN-PD-12.5 | PDMAPAAm/PNIPAAm mixed brush | 857 | 11,000 | 1.24 | 12.5 | 1400 | 4.27 | −0.43 | 78.0 ± 3.6 | 74.3 ± 0.6 |
| PN-PD-25.0 | PDMAPAAm/PNIPAAm mixed brush | 857 | 10,000 | 1.53 | 25.0 | 3800 | 7.79 | 0.56 | 78.7 ± 1.5 | 78.7 ± 1.7 |
| PN-PD-37.5 | PDMAPAAm/PNIPAAm mixed brush | 857 | 10,000 | 1.54 | 37.5 | 15,000 | 9.07 | 1.21 | 77.7 ± 3.1 | 76.7 ± 4.9 |
a
Determined by GPC using DMF with 50 mM LiCl as mobile phase.
b
Determined by 1H NMR using chloroform D1.
c
Determined by zeta potential analyzer.
d
Determined by a contact angle meter using pure water droplet.