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

SiOX/TPGDA/SiOX 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 SiOX 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 F1L and strain εL of SiOX/TPGDA/SiOX “sandwich” structural barrier film are 174.17 N and 112%，respectively，and the transverse breaking force F1H and strain εH 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.