Three-dimensional nanofiber integration enhances radiation resistance in protective gloves: Molecular mechanisms and predictive modeling.

Electron beam sterilization in medical and nuclear facilities creates ongoing challenges for protective glove integrity, with frequent failures imposing significant safety risks and operational costs. This study employed a comprehensive multi-technique molecular analysis approach using Electron Paramagnetic Resonance (EPR), Positron Annihilation Lifetime Spectroscopy (PALS), and Small-Angle X-ray Scattering (SAXS) to investigate the performance gap between nanofiber-reinforced woven (NFW) and surface-coated (SC) nitrile gloves subjected to clinically-relevant radiation doses (10-25 kGy). The main finding revealed that NFW gloves achieve 2.5-fold longer service life than SC alternatives through superior molecular-level protection mechanisms. EPR spectroscopy showed SC gloves developed 61 % higher radical concentration than NFW gloves at 25 kGy (8.7 × 1017 vs 5.4 × 1017 spins/g), with NFW exhibiting superior radical stability (62 % retention at 168h versus 43 % for SC gloves). PALS demonstrated NFW's significantly lower Void Expansion Coefficient (0.07 vs 0.41 Å3/kGy), correlating with reduced oxygen diffusion rates (1.4 × 10-9 vs 8.7 × 10-9 cm2/s). SAXS analysis established superior Structural Preservation Quotient for woven architecture (0.81 vs 0.33), reflecting enhanced nanoscale organizational stability. NFW gloves retained 68 % of tensile strength at 25 kGy compared to only 42 % for SC gloves, demonstrating practical performance advantages. Integration of these molecular parameters into a comprehensive Molecular Protection Factor (5.7 vs 2.3) enabled accurate prediction of mechanical performance retention with 92 % correlation across the radiation spectrum. Three-dimensional woven integration provided extended Effective Protection Period of 42 months versus 17 months for surface-concentrated alternatives. The protection mechanism hierarchy demonstrated stress distribution effectiveness as the primary factor (41 % contribution), followed by radical isolation (27 %), void restriction (19 %), and network balance (13 %). Interface engineering and spatial distribution optimization offered superior enhancement potential (215 % calculated improvement) compared to traditional antioxidant approaches (maximum 65 % enhancement), establishing validated molecular-scale design principles for next-generation radiation-resistant protective equipment development.