Use of inorganic nanoparticles which have been recently explored for therapeutic purposes in the treatment of oxidative stress disorder, cancer and heart diseases due to their strong free radical scavenging capacity (anti-oxidant). Candidate nanoparticles include Al2TiO5, CeO2, etc. Selected inorganic nanoparticles have been proven to show excellent free radical scavenging capabilities. Synthesis of nanocomposite (cyanate ester, bismaleimide, etc.) incorporated with nanoparticles and fibers. Space environment resistant property is characterized under high energy radiation exposure (high energy proton, electron, UV, vacuum, etc.) via collaboration (MSFC).