Guanidine phosphate applied to wood flame retardant effect is very good

Guanidine phosphate applied to wood flame retardant effect is very good

From Beijing University of Technology, Vol. 3, No. 3, 2009

Wood is a kind of natural polymer with relatively high cellulose content, which produces a large amount of volatile flammable gas when it is pyrolyzed above 300 ° C, causing wood to burn easily and cause fire. Flame retardant treatment of wood to reduce its flammability has a high use value and practical significance. There have been many reports on the research of wood flame retardants, among which guanidine flame retardants are widely used because of economic and practical. It is found that these flame retardants have catalytic carbonization. At the same time, flame retardants can reduce the pyrolysis temperature of wood and increase the remaining carbon. However, the relationship between its pyrolytic behavior and flame retardancy has not been found.

In order to study the relationship between wood pyrolysis behavior and flame retardancy and explore its pyrolysis mechanism, wood dihydroguanidine phosphate and dihydroguanidine phosphate flame retardants were treated with flame retardancy. The obtained flame retardancy wood was analyzed by thermogravimetric analysis (TG), differential thermal analysis (DTA) and infrared spectroscopy (IR), and the thermal activation energy of wood was calculated by Broido equation. The results showed that the wood treated with dihydroguanidine phosphate and biguanide phosphate had good flame retardation, and the oxygen index was 39%-42%. The main pyrolysis stage takes place below 300 13, and the apparent activation energy of pyrolysis decreases by about 60 kJ/mol, mainly because the pyrolysis of wood below 300 13 mainly results in dehydration, rearrangement and cross-linked carbonization to produce a small amount of combustible gas. Residual carbon added to the study of the relationship between wood pyrolysis behavior and flame retardant properties, and explored its pyrolysis mechanism. The wood was treated with a series of guanidine flame retardants, and the resulting flame retardant wood was analyzed by thermogravimetric (TG), differential thermal analysis (DTA) and infrared spectroscopy (IR), and the pyrolysis activation energy of wood was calculated by Broido equation. The results showed that the wood treated with dihydroguanidine phosphate and biguanide phosphate had good flame retardation, and the oxygen index was 39%-42%. The main pyrolysis stage is below 300 13, and the apparent activation energy of pyrolysis is reduced by about 60 kJ/mol. This is mainly because the pyrolysis of wood below 300 13 mainly involves dehydration, rearrangement and cross-linked carbonization to produce a small amount of flammable gas, and the remaining carbon increases.