Natural-rubber-latex/silica-aerogel composites made with eight-day pre-vulcanised latex had greater crosslink density, better preserved aerogel pores and 42.41% lower thermal conductivity than the zero-day formulation. The material remained flexible and thermally stable to 387.3°C, but mechanical durability, service life and fire behaviour were not established.
Key findings
- The eight-day formulation reached a peak crosslink density of 7.277 ± 0.881 micromol/g, retained pore area closest to pristine aerogel and had 42.41% lower thermal conductivity than zero-day latex. Conductivity rose more slowly with immersion time, thermal stability reached 387.3°C and the composite flexed at room temperature.
Why this matters globally
Flexible insulation based on natural rubber could add value to a biobased feedstock and suit curved surfaces, buildings or devices where rigid insulation is difficult to install.
Thai researcher contribution
KMITL nanoscience researchers collaborated with Mahidol chemistry and innovative-learning researchers to connect rubber networks, pore preservation and thermal behaviour.
Limitations to consider
This is an internal laboratory comparison. Absolute conductivity, tear/compression strength, water uptake, UV/humidity ageing, fire, smoke and thermal cycling are not reported in the abstract. TGA stability is not the same as a safe service temperature.
Verify the original sources
GelsRead the original article↗DOI: 10.3390/gels12070599