Introduction
Experimental
Materials
Preparation of microporous silica aerogel
Preparation of microporous silica aerogel treated samples
Test methods
Weight percent gain (WPG)
Microscopic analysis
FTIR analysis
Leaching test
Water repellency
Anti–swelling–efficiency (ASE) and swelling anisotropy
Equilibrium moisture content (EMC)
Water uptake
Water vapour diffusion
Total colour change (∆E*)
Statistical analysis of the results
Results and discussion
Weight percent gain
Beech | Pine | |||
---|---|---|---|---|
WPGwet (%) | WPGdry (%) | WPGwet (%) | WPGdry (%) | |
Mean | 79.22 | 6.90 | 101.14 | 9.40 |
Min | 65.61 | 5.53 | 71.38 | 6.00 |
Max | 94.82 | 9.01 | 130.50 | 11.99 |
St. Dev | 7.94 | 1.03 | 20.17 | 2.25 |
Var. Coeff | 10.02% | 14.92% | 19.94% | 23.89% |