Shape Memory Aerogel Based on Poly (vinyl alcohol) Nanofibres

Shape memory aerogels are the most attractive smart materials with commonly lack of enough flexibility. In order to improve this drawback, a novel shape memory aerogel based on Poly (vinyl alcohol) (PVA) nanofibres was produced. PVA hydrogel was first successfully electrospun into nanofibres, and subsequently dried in a safe supercritical CO2 high pressure chamber. Gravimetric measurements and SEM results indicated that PVA nanofibre aerogels contain more than 80 vol % porosity and pore size below 100 nm. The shape memory behavior of the samples on exposure to heat for 3 cycles exhibited full shape recovery at around 11±2.6 s.

کلیدواژه ها:

Poly (vinyl alcohol) ، Nanofibre ، Aerogel ، Electrospinning ، Shape memory