Chemical and physical changes of steam treated wood chip

Abstract

High dimensional stable particleboards could be produced by usisng saturated steam treated wood chip at elevated pressures. Sample Particleboards were made from wood chip of Birch (Platyphylla). The component changes of steam treated wood chip were analysed by infrared. Infrared spectra demonstrated that the hemicelluloses in steam treated chip were less than those in untreated chip. This is one of the main reasons why steam treatment could improve particleboard stability. The free radical concentration of steam treated chip surfaces was analysed by ESR spectroscopy. The results showed that free radical concentration of treated chip surface was higher than that of untreated chip surface. The glueyness of chip increased and particleboard resin content decreased.

References

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