Construction and performance of high barrier films with SiO_X/TPGDA/SiO_X “sandwich” structure for water-oxygen barrier properties

SiO_X/TPGDA/SiO_X sandwiched films are fabricated by roll-to-roll plasma vapor deposition (roll-to-roll PECVD) and roll-to-roll evaporation coating technology. Silane coupling agent and ion source treatment for surface activation are employed to enhance the interface bonding force between the inorganic layer SiO_X and the organic layer TPGDA. The preparation technology, mechanical properties, barrier properties and optical properties of laminated films are investigated. The results indicate that the longitudinal breaking force F_1L and strain ε_L of SiO_X/TPGDA/SiO_X “sandwich” structural barrier film are 174.17 N and 112%, respectively, and the transverse breaking force F_1H and strain ε_H are 159.86 N and 135%, respectively. The water vapor transmission rate of the barrier film is as low as 0.1 g·m⁻²·day⁻¹, and it still maintained good water resistance performance after the double “85” experiment. Moreover, the light transmittance and haze of the barrier film are 89.2% and 1.05%, respectively. This technology holds promising application potential in aerospace and military sectors, including but not limited to: future space station food packaging and storage, encapsulation of solar panels, moisture-proofing of sensitive materials in missiles and ammunition, as well as protection of precision components in radar and infrared remote sensing systems against humidity.