Table 6.
Main biobased SMPUs and recovery properties.
| Ref | Polyol type | Thermal transition | Shape memory parameters |
Shape memory (cycle 1)* |
Recovery test |
Cytotoxicity |
|||
|---|---|---|---|---|---|---|---|---|---|
| Tdef, Tfix, Trec** | Streching [%] | Shape Fixity Rf [%] | Shape Recovery Rr [%] | Temp.*** | Time | Test type, Cell type | |||
| [302] | CO | Tm: 20.5 °C–54.4 °C | 65 °C, 5 °C, 65 °C | n.m | 47.8–94.6 | 82.0–94.1 | n.m | n.m | MTT, NIH 3T3 |
| 65 °C, 25 °C, 65 °C | 57.4–97.7 | 88.6–96.7 | n.m | n.m | |||||
| [297] | CO | Tm: 65.4 °C–70.0 °C | n.m, n.m, 25 °C | 50 | 78.1–93.5 | 90.5–95.6 | 25 °C | 195s | MTT, L929 |
| n.m, n.m, 40 °C | 87.1–95.5 | 91.1–94.5 | 40 °C | 74s | |||||
| [301] | CO | Tm: 52.2 °C–65.0 °C | >Tm, <Tm, >Tm | 50 | 88.9–96.9 | 81.7–93.1 | n.m | n.m | MTT, L929 |
| 100 | 86.4–88.6 | 78.1–85.0 | n.m | n.m | |||||
| 250 | 72.0–80.0 | 72.4–84.7 | n.m | n.m | |||||
| [296] | CO | Tg: 13.6 °C–14.5 °C | 40 °C, −10 °C, 40 °C | 50 | 91.6–98.3 | 85.5–87.3 | n.m | n.m | Optical density, L929 |
| [299] | PLA-PCL-PLA | Tg: 38.9 °C–46.8 °C | 60 °C, 0 °C, 60 °C | n.m | 99.4–99.9 | close to 100 | 60 °C | <10s | n.m |
| [298] | PLA-co-CL | Tg: 28.7 °C–34.0 °C | 37 °C, −195,79 °C, 37 °C | 200 | n.m | 43–52 | 37 °C | 1–2min | n.m |
| [300] | PLA | Tg: 41.1 °C–54.1 °C | Tg+15 °C, 40 °C, 75 °C | 100 | >95 | >70 | 60 °C | 10s | n.m |
| [303] | Starch | Tm: around 40 °C | 60 °C, −15 °C, 40 °C | n.m | 70.0–98.8 | 93.3–98.9 | 40 °C | 20–25s | Live/Dead, HDF |
| [304] | PC | Tm: 37 °C–54 °C | 60–70 °C, -10-0 °C, 60–70 °C | 100 | 93.3–98.1 | 98.6–99.3 | n.m | n.m | n.m |
| 400 | 91.8–98.4 | 98.5–99.3 | |||||||
| 600 | 90.9–97.7 | 99.1–99.4 | |||||||
| [305] | PBA | Tm: 44.6 °C–47.3 °C | 40 °C, 10 °C, 40 °C | 50 | 75–85 | 75–80 | 60 °C | 50s | n.m |
| Tm: 43.6 °C–48.6 °C | 70–75 | 70–75 | |||||||
| PEA | Tm: 41.3 °C–42.3 °C | 70–80 | 70–75 | ||||||
| [295] | PGS | – | in water, 24 °C | – | 25–90 | 70–95 | 22 °C | <1 h | n.m |
| in PBS, 37 °C | 25–90 | 75–90 | |||||||
N.m: not mentioned *Most works comprised several cycles **Tdef = deformation temperature, Tfix = fixation temperature, Trec = recovery temperature ***Temp. = temperature.