Adopt the modified sol-gel method to prepare chitosan and inorganic phase SiO
2
form amino-modified crosslinked composite gel to add to polyurethane coating (PU paint) and wood substrate. The result shows that the pore size of amino-modified crosslinked composite gel is 12
μ
m~16
μ
m
it not only preserves the light structure and mesoporous characteristics of gel
but also contains the active organic groups that chitosan has. It has certain adsorption effect on VOCs of PU paint and wood substrate
among which
the adsorption effect of VOCs on fir is the strongest
reaching 72.86%. It is showed that this method has certain operability and it will provide a new method for the prevention and control of wood furniture pollution
which can make it possible to achieve the large-scale enterprise application.