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Role of Carbon Bridge Length of Organosilicate Precursors on the Atmospheric Plasma Deposition of Transparent Bilayer Protective Coatings on Plastics
Author(s) -
Dong Siming,
Han Jiahao,
Zhao Zhenlin,
Dauskardt Reinhold H.
Publication year - 2016
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201600024
Subject(s) - materials science , bilayer , layer (electronics) , coating , composite material , carbon fibers , adhesive , chemical engineering , elastic modulus , deposition (geology) , adhesion , composite number , chemistry , membrane , biochemistry , sediment , engineering , biology , paleontology
We demonstrate the deposition of transparent organosilicate protective bilayer coatings on poly methyl methacrylate (PMMA) substrates with different carbon chain length dipodalsilane precursors using atmospheric plasma deposition in ambient air. The bottom adhesive layer was a hybrid organosilicate coating deposited using either only carbon bridge organosilicate precursor or accompanied with a ring structure 1,5‐cyclooctadiene precursor. The top layer was a dense silica coating with high elastic modulus and hardness deposited with only carbon bridge precursor. The adhesion energy of bottom layer increased with increasing carbon bridge length of precursors while the density, hardness, and elastic modulus of top hard layer decreased. The deposited bilayer structure showed ∼3 times the adhesion energy and four times the elastic modulus of commercial polysiloxane sol–gel coatings.