金属盐对无机硼类防腐剂抗水流失性的改善  

Improvement on the leaching resistance of boron based wood preservative by metallic salts

作　　者：余丽萍[1] 曹金珍[1] 闫丽[1] 

机构地区：[1]北京林业大学材料科学与技术学院

出　　处：《北京林业大学学报》2009年第6期86-89,共4页Journal of Beijing Forestry University

基　　金："十一五"国家科技支撑计划项目(2006BAD18B09);高等学校全国优秀博士学位论文作者专项基金(200352)

摘　　要：为考察用金属盐与硼化物复合处理杉木后,处理材中硼的抗水流失性,采用3种硼化物(硼酸、硼砂、四水合八硼酸二钠)和3种金属盐(硫酸锌、乙酸锌和无水氯化钙),用两步法来复合处理杉木。针对每种金属盐设计了正交试验,考察硼化物种类、金属盐种类和浓度、后处理条件对硼保持率的影响,并进行了流失试验。结果表明:①将硼化物和金属盐分两步来处理木材,从而提高硼的抗水流失性是可行的;②处理材中硼的保持率随着金属盐浓度的增大而增大,同时也随着后处理温度的升高而提高;③无水氯化钙对硼的固着效果相对最好,其次是乙酸锌,而硫酸锌对硼的固着效果相对较差;④硼酸与无水氯化钙、硼砂或四水合八硼酸二钠与乙酸锌的组合比该种硼化物与其他2种金属盐复合处理材的硼的保持率高。The objective of this study is to investigate the resistance leachability of soluble boron compounds （SBX） in Chinese fir （Cunninghamia lanceolata Hook.） by using metallic salts. Three SBX（including boric acid,borax,disodium octaborate tetrahydrate） and three metallic salts （including zinc sulfate,zinc acetate,anhydrous calcium chloride） were selected and two-step method was used to treat Chinese fir in this study. An orthogonal experiment was designed for each metallic salt and the effect of three factors （including the kind of borate,concentration of metallic salts,temperature of post-treatment） on the percentage of boron retention in treated wood was investigated. The leaching process of boron from wood blocks was performed. The results showed that：1） it is feasible to enhance the leaching resistance of boron by using boron compounds and metal salts in two steps; 2） the retention rates of boron in treated wood increased with increasing concentration of metallic salts and temperature of post-treatment; 3） anhydrous calcium chloride had the best function on fixing boron in wood,followed by zinc acetate and zinc sulfate; 4） the retention rates of boron were higher when wood treated with boric acid combined with anhydrous calcium chloride as well as acetate or anhydrous calcium chloride combined with zinc acetate than the SBX combined with other two metallic salts.

关 键 词：杉木 硼化物 金属盐 硼的保持率 

分 类 号：S781.2[农业科学—木材科学与技术]