可以通过化学和热改性来提高短转木材的耐久性。化学和热改性会对木材的物理化学性质产生影响,这会影响木材的表面特性及其耐候性。这项研究的目的是研究涂有亚麻籽油(LO)的化学和热改性的短旋转柚木的表面特性和人工耐候性-,桐油(TO)-,和由亚麻子油和桐油(LT)的混合物组成的商业油基涂料和商业油基聚氨酯树脂(LB)涂料。短旋柚木在未经处理和用糠醇(FA)处理的情况下制备,热处理(HT)在150和220°C,甘油-马来酸酐(GMA)浸渍与150和220°C热处理的组合。测量的表面特性是表面自由能,润湿性,Persoz硬度,粘接质量,人工风化暴露前后的颜色变化。结果表明,化学和热改性处理倾向于降低总表面自由能(SFE),硬度,润湿性,和粘接质量。220°C的FA和GMA处理对表面特性具有均质化作用,特别是在总SFE和润湿性。未经处理的木材的总SFE范围从45.00到51.13mN/m,处理后的木材范围为40.58至50.79mN/m。根据K值,油基涂层的润湿性范围为0.20至0.54。TO表现出比LO更好的光稳定性。与纯天然干性油相比,涂有油基商用涂料的短旋转柚木具有更好的耐候性。商业油基涂料为化学和热改性的柚木提供了更好的耐候性保护。正在考虑在化学和热改性的短旋转柚木上应用油基涂料,以开发更好的木材保护系统。
Improving the durability of short-rotation wood can be achieved through chemical and thermal modification. Chemical and thermal modification can have an impact on the physicochemical properties of wood, which can affect wood\'s surface characteristics and its resistance to weathering. The purpose of this study was to investigate the surface characteristics and artificial weathering resistance of chemically and thermally modified short-rotation teak wood coated with linseed oil (LO)-, tung oil (TO)-, and commercial oil-based coatings consisting of a mixture of linseed oil and tung oil (LT) and commercial oil-based polyurethane resin (LB) coatings. The short-rotation teak woods were prepared in untreated and treated with furfuryl alcohol (FA), thermal treatment (HT) at 150 and 220 °C, and combination of glycerol-maleic anhydride (GMA) impregnation with thermal treatment at 150 and 220 °C. The surface characteristics measured were surface free energy,
wettability, Persoz hardness, bonding quality, and color changes before and after artificial weathering exposure. The results showed that chemical and thermal modifications treatment tended to reduce total surface free energy (SFE), hardness,
wettability, and bonding quality. FA and GMA at 220 °C treatments provided homogenization effect on surface characteristics, especially in total SFE and
wettability. The total SFE of untreated wood ranged from 45.00 to 51.13 mN/m, and treated wood ranged from 40.58 to 50.79 mN/m. The
wettability of oil-based coating according to K-value ranged from 0.20 to 0.54. TO presented better photostability than LO. Short-rotation teak wood coated with oil-based commercial coatings presented better weathering resistance compared to pure natural drying oil. Commercial oil-based coatings provided better weathering protection for the chemically and thermally modified teak wood. The application of oil-based coatings on chemically and thermally modified short-rotation teak is being considered for the development of a better wood-protection system.