Abstract: Provided are a method for fabricating a highly elastic porous polymer membrane, a method for manufacturing a cell culture system using a porous polymer membrane fabricated by the fabrication method, and a cell culture system manufactured by the manufacturing method. The porous polymer membrane can be fabricated by spin coating a mixture solution containing a biodegradable elastomeric polymer and a water-soluble moisture absorbent in an optimum ratio while maintaining a high relative humidity. The porous polymer membrane has a uniform thickness and a uniform pore size and is highly elastic. In addition, the thickness and pore size of the porous polymer membrane can be controlled. The porous polymer membrane can induce active cell-cell interaction during cell co-culture due to its high porosity. The porous polymer membrane enables control over cell alignment or array due to its high biocompatibility and elasticity.

Abstract: The aluminum alloy of a vehicle space frame includes aluminum as a main ingredient, 0.4 to 0.5 wt % of copper, 2.5 to 3.0 wt % of silicon, 0.1 wt % or less of magnesium, 0.1 wt % or less of iron and 0.2 wt % or less titanium. The method of manufacturing the vehicle space frame includes casting the above material, subjecting the cast aluminum alloy to a solution treatment, and heat treating the resulting material at 150° C.-160° C. for 4-5 hours.