mylar (or foil) balloons seem to float for longer than a week, while a latex balloon will only float for a day when filled with heliumThis is because the metal coating on the balloon prevents the helium atoms from diffusing outI was just wondering if spray painting a latex balloon with silver spray paint (containing aluminum powder usually) would have a similar effect and keep it a float longer? Would the oil from the spray can break the balloon? Thanks.
Densitymass/volume Lead: 11.34 g/cm320000 g/volume 11.34 volume20000 volume20000/11.34 volume1763.67 cm3 Volume(4/3)pi(r)^3 1763.67(3/4)pir^3 421.03r^3 7.49 cmr Aluminum 2.69 g/cm^320000 g/volume volume20000/2.69 volume7434.94 cm^3 Volume(4/3)pir^3 7434.94(3/4)/pir^3 1744.96r^3 12.11 cmr
Couple points (I used to work in elastomer industry): 1any petroleum product will degrade natural rubber latex and burst the ballon (see warning signs on condoms if you need reassurance!) 2For the aluminium to be effective to reduce the diffusion of gas the particles need to have an overlaying effect like plates lying on top of each other (see encyclopedia decriptions on clays as an analogy)This ideally should be integrated into the latex matrix to be effective i.espraying onto the surface is unlikely to be effectiveFYI Car tyres use clay type substances in the elstomer to reduse diffusion of gas (air in this instance) If you are into experimentation them mixing a powdered clay into liquid latex and then forming on a suitable former would probably provide the desired effect but look really nasty! so not commercialHope this helps
Densitymass/volume Lead: 11.34 g/cm320000 g/volume 11.34 volume20000 volume20000/11.34 volume1763.67 cm3 Volume(4/3)pi(r)^3 1763.67(3/4)pir^3 421.03r^3 7.49 cmr Aluminum 2.69 g/cm^320000 g/volume volume20000/2.69 volume7434.94 cm^3 Volume(4/3)pir^3 7434.94(3/4)/pir^3 1744.96r^3 12.11 cmr
Couple points (I used to work in elastomer industry): 1any petroleum product will degrade natural rubber latex and burst the ballon (see warning signs on condoms if you need reassurance!) 2For the aluminium to be effective to reduce the diffusion of gas the particles need to have an overlaying effect like plates lying on top of each other (see encyclopedia decriptions on clays as an analogy)This ideally should be integrated into the latex matrix to be effective i.espraying onto the surface is unlikely to be effectiveFYI Car tyres use clay type substances in the elstomer to reduse diffusion of gas (air in this instance) If you are into experimentation them mixing a powdered clay into liquid latex and then forming on a suitable former would probably provide the desired effect but look really nasty! so not commercialHope this helps
