Composite material for the protection of h2o sensitive devices based on surface functionalized nanozeolites dispersed in a polymeric matrix

Abstract

The present invention relates to a moisture barrier for the protection of internal environment of sensitive devices comprising a homogeneous dispersion of superficially functionalized containing surface modifying organic group belonging to the same chemical class of at least one functional group of the polymeric compound, to a process for the production of said barrier and to sensitive device comprising such barriers.

1 . A composite material comprising a homogeneous dispersion of superficially functionalized nanozeolites in a polymerizable compound, wherein said nanozeolites contain surface modifying organic groups belonging to the same chemical class of at least one functional group of the polymerizable compound, said composite material capable of being a barrier against H2O. 
     
     
         2 . The composite material according to  claim 1  wherein the surface modifying organic group of the nanozeolites is the same of at least one functional group of the polymerizable compound. 
     
     
         3 . The composite material according to  claim 1 , wherein said functionalization on the superficially modified nanozeolites comprises aromatic groups. 
     
     
         4 . The composite material according to  claim 3 , wherein said aromatic groups are phenyl groups. 
     
     
         5 . The composite material according to  claim 1 , wherein at least one of the surface modifying organic groups is an aliphatic group. 
     
     
         6 . The composite material according to  claim 2 , wherein the surface modifying group of the nanozeolites is a polymerizable group. 
     
     
         7 . The composite material according to  claim 6 , wherein the surface modifying group is a glycidoxy, an acrylic or a methacrylic group. 
     
     
         8 . The composite material according to  claim 1 , wherein said polymerizable compound is an organic resin, an epoxy resin, or an acrylic resin. 
     
     
         9 . The composite material according to  claim 1 , wherein said polymerizable compound is a novolak resin. 
     
     
         10 . The composite material according to  claim 1 , wherein said surface modified nanozeolites are LTA, FAD, LTL or GIS zeolites. 
     
     
         11 . The composite material according to  claim 8 , wherein the epoxy resin is a single component resin. 
     
     
         12 . The composite material according to  claim 11 , wherein said single component resin is a bisphenol and epichlorhydrin (DGEBA) based resin. 
     
     
         13 . A process for making the composite material according to  claim 1 , comprising performing a deposition process of a barrier precursor and performing a consolidation process for the barrier precursor. 
     
     
         14 . The process according to  claim 13  wherein said deposition is made by serigraphy. 
     
     
         15 . The process according to  claim 13  wherein said deposition is obtained by micro-dispersing. 
     
     
         16 . The process according to  claim 15  wherein said microdispersion is obtained with a syringe. 
     
     
         17 . The process according to  claim 13  wherein said consolidation process is selected from the group consisting of UV irradiation, thermal process and their combination. 
     
     
         18 . A sensitive device comprising the composite material according to  claim 1 . 
     
     
         19 . The sensitive device according to  claim 18  wherein said composite material is present on the edge of the sensitive device. 
     
     
         20 . The sensitive device according to  claim 18  wherein said composite material covers an inner part of the sensitive device. 
     
     
         21 . The sensitive device according to  claim 18  wherein said device is a photovoltaic cell. 
     
     
         22 . The sensitive device according to  claim 18  wherein said device is an OLED screen. 
     
     
         23 . The sensitive device according to  claim 18  wherein said device is a micro-electromechanical device. 
     
     
         24 . The sensitive device according to  claim 18  wherein said device is an energy storage device. 
     
     
         25 . The sensitive device according to  claim 24  wherein said device is a lithium battery.