UV-cured organic–inorganic hybrid moisture barrier materials

In a new study, a synthesised polymerisable quaternary ammonium salt (PQAS-18) was intercalated into inorganic sodium montmorillonite (Na-MMT) as an organic modifier via cationic exchange.

Water drop on a green leaf.
The researchers developed hybrid moisture barrier materials based on polybutadiene dimethacrylate. Source: Avenfor7 / Pixabay. -

Afterward, a novel organic–inorganic hybrid material was prepared through in situ UV-curing technology and combined with a polymer matrix based on polybutadiene dimethacrylate (PBDMA).

PQAS-18 fixed the crosslinked network due to its double bond, thereby leading to firm bonding between the polymer matrix and organoclay; moreover, the study showed homogeneous dispersion of the lamellar structure in the polymer matrix.

Significant improvement of the moisture barrier

X-ray diffraction proved that the distance between Na-MMT layers increased, and water vapour transmission measurement showed that the moisture barrier property of cured hybrid film was remarkably improved.

The study is published in: Journal of Coatings Technology and Research  March 2019, Volume 16, Issue 2, pp 429–437.

Image source: Pixabay

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