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Received:December 18, 2017Revised:January 08, 2018
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Study on the Surface Characteristics of Pinus massoniana Heat-treated Wood
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Abstract:
The Pinus massoniana was studied by steam heat treatment at 180, 200, 220 ℃ for 1, 3, 5 h, respectively. Using dryer method to test the change of formaldehyde adsorption of different temperature heat-treated wood and using temperature programmed chemical adsorption, surface contact angle and surface testing method to explore the changing laws of heat treated wood surface characteristics that treated different temperature treatment. The results showed that: compared with non-heat treatment meterials, (1) the formaldehyde adsorption performance was improved after heat treatment, and when P. massoniana were treated at 180 ℃ for 1h, the formaldehyde adsorption performance was best, and with the extension of processing temperature and time, the formaldehyde adsorption performance showed a trend of decrease overall; (2) the adsorption of formaldehyde by heat treatment wood was not only physical adsorption, but also chemical adsorption; (3) after treatment of different temperature, the wood’ s surface area decreased; (4) after heat treatment, the surface contact angle of polar distilled water on the wood surface was larger than the untreated material, and the higher the temperature of heat treatment, the greater the contact angle on its surface, while the surface contact angle of non-polar diiodomethane on the wood surface had the opposite trend.
Key words:  heat-treated wood; formaldehyde adsorption; specific surface area; surface contact angle

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