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Thermoresponsive sub-microporous films having a lower critical solution temperature (LCST), promptly obtained by using the breath figure method, were applied to tissue engineering. These sub-microporous films, sized 100-400 nm, were prepared by blending poly(N-isopropylacrylamide) (PNIPAAm) with polystyrene (PS), in addition to applying the dynamic breath figure (BF) method. The thermoresponsive blends were prepared with polyethylene terephthalate (PET) substrate by using a spin coater; the pore size was modulated according to the spin speed. The sub-microporous films, either with pure PNIPAAm or with different PNIPAAm contents were applied as substrates in order to obtain cell growth (Vero cells); moreover, the effect of PNIPAAm use was evaluated. The PNIPAAm sub-microporous films made the cellular viability to be 9-13-fold higher than the control sample commonly used in cell culture. In addition, the thermoresponsive PNIPAAm properties were even noticed at a low PNIPAAm content in the porous films. Such polymer system was successfully applied to detach the Vero cell tissue using temperature variation.
This article was published in the following journal.
Name: Journal of colloid and interface science
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