Table 4 Thermal insulation properties of samples and other commonly used thermal insulation materials.

From: Cellulose as an adhesion agent for the synthesis of lignin aerogel with strong mechanical performance, Sound-absorption and thermal Insulation

Materials

Density (g cm−3)

Thermal conductivity (W m−1 K−1)

Diffusivity (mm2 s−1)

Source

S-75

0.052

0.144

0.065

S-90

0.080

0.138

0.064

S-95

0.403

0.128

0.061

Lightweight concrete

0.551

0.155

0.319

48

Polyurethane board

0.028

0.024

0.558

48

0.033

0.022

0.434

Class fiber (axial)

0.030

0.042

1.460

48

0.095

0.038

0.417

Rock wool (axial)

0.050

0.042

1.000

48

0.120

0.040

0.397