It wouldn't be useful on a spacecraft because it takes advantage of a transparent band in the Earth's atmosphere. In space, you have that already at all wavelengths.
More to the point, a heat shield is used for re-entry and this stuff would decompose almost instantaneously. It's be like trying to use a handheld fan to cool yourself while standing in a kiln.
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Also it would make a great clothing to wear in the summer or on a spacecraft heat shield.
It wouldn't be useful on a spacecraft because it takes advantage of a transparent band in the Earth's atmosphere. In space, you have that already at all wavelengths.
More to the point, a heat shield is used for re-entry and this stuff would decompose almost instantaneously. It's be like trying to use a handheld fan to cool yourself while standing in a kiln.