Improving the thermal properties of pigmented acrylic resin with silica aerogel. Source: Pixabay
26. Sep 2017 | Raw materials
Improving the thermal properties of pigmented acrylic resin
Iranian researchers have investigated whether silica airogel improves the thermal properties of pigmented acrylic resin.
Two different types of acrylic resins were synthesised through emulsion polymerisation. The first category contained methyl methacrylate, 2-ethylhexyl acrylate, and acrylic acid monomers. The second composition had an additional monomer named acrylamide (AAm).
AAm increases paint adhesion
The results showed that the presence of the AAm monomer increased the monomer conversion (90% in the first 10 min) and the rate of polymerisation. To study the effect of silica aerogel as a thermal barrier additive for acrylic resins, samples were mixed with silica aerogel using sodium dodecyl sulfate as surfactant. In the next step, the resins were used to make white acrylic-based paints. The heat transfer measurements revealed that the thermal insulation properties were not affected by the composition of the resin. On the other hand, the use of AAm monomer increased the paint adhesion properties and helped the resin to receive more aerogel (up to 5 wt %) which in turn decreased the heat loss of the painted wall.
The study is published in: Applied Polymer Science, Volume 135, Issue 1, January 05, 2018.
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