3种棕榈藤藤材防变色的研究

Studied on the Prevention of Discoloration with Three Kinds of Rattan Canes

目前,棕榈藤（rattan）主要用作家具、工艺品,其产品具有很高的商品价值.藤制品在使用过程中色调逐渐加深（变色）,尽管变色对材质材性影响不大,但对色调有损伤,直接影响制品的外观,降低商品价值.因此,抑制藤材的变色对保持产品外观和商品价值具有重要意义.

The prevention of discoloration of three kinds of rattan canes, i.e., Calamus simplicifolius, Calamus tetradactylus, Daemonorups margaritae, was discussed in this paper. The pre-treatment, such as extraction of hot water and alcohol-benzene and PEG spread, was used to prevent the rattan canes discoloration. 1 000 and 4 000 molecular weight of PEG was chosen in the experiment. The result showed that the value of L^＊ and a ^＊ changed remarkably and that of b ^＊ was increased ^＊th the extraction pre- treatment by xenon lamp light irradiation for 84 h. The value of L^＊ was decreased clearly with extraction of hot water, a^＊ was change slightly and b ^＊ was increased with extraction of hot water and alcohol-benzene. From the point of view of practical uses, the extraction of hot water was better than that of alcohol-benzene. The value of L^＊ , a ^＊ and b ^＊ of the rattan canes treated with PEG spread was decreased. The influence of the concentration of PEG solution was different with the three of rattan canes and the value of L^＊ , a ^＊ and b^＊ between the molecular weight of PEG 1 000 and 4 000 had a small difference. Comparing with the extraction of hot water and PEG spread treatment, it is indicated that the former exceeded the latter. Along with increase of the irradiation time, the L^＊ of the rattan canes treated with PEG spread was increased. It is suggested that extraction of hot water and PEG spread should be used together for the prevention of the rattan canes discoloration in the future.