Moisture-cured Elastomeric Transparent UV and X-ray Shielding Organic-inorganic Hybrids
Tang, Y. H.
Lam, W. M.
Lu, W. W.
Zhao, C. B.
Yuen, M. M. F.
|Source||Journal of Materials Science , v. 45, (13), 2010, JUL, p. 3588-3594|
|Summary||We report the synthesis and characterization of a kind of silane-terminated poly(ether-urethane) (PEU)-titania elastomeric hybrid for UV and X-ray shielding application. The hybrids can be easily synthesized by a moisture-cured sol-gel process at room temperature. Strong interactions between the organic and inorganic domains in these hybrids are obtained through the hydrolysis-condensation of the silane end group of the prepolymer with titanium isopropoxide (TTIP), which forms a 3D hybrid network. These hybrids exhibit adjustable mechanical properties, in a range dependent on the organic/inorganic content ratio, e.g., the hybrid containing 40 wt\% of TTIP exhibits 69.3\% elongation at break and excellent resilience. They show intrinsic optical transparency and the ability to completely block UV radiation in the range of UV-B and UV-A2, as well as excellent X-ray radiation blocking property. This study opens the possibility for using elastomeric coating and sealant in advanced personal protection equipments for shielding radiations.|
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