摘要
各种实木和人造板是文物收藏柜和储藏柜的常用木质材料。这些木材普遍含有挥发性酸,是影响文物藏展环境的主要因素之一。为检测评价文物藏展常用木材的挥发性酸特征,实验采用研发的"无动力扩散采样一离子色谱"检测技术,在密闭空间中以40℃恒温加速挥发,无动力扩散采样4h,并用离子色谱双等度分析方法半定量检测挥发性酸。探讨了该项快速评价方法的相关实验参数及其确定方法,检测了14种常用木材。结果显示,红橡、樟木和经过防腐处理的椴木、棱柱木中的甲酸与乙酸的挥发量较高,单位表面积乙酸挥发量达到4mg·m^(-3)·mm^(-2)以上,甲酸挥发量也超过0.5mg·m^(-3)·mm^(-2),应当慎用。为控制木材挥发物影响文物保存环境,试验用铝塑膜包覆封闭木材并作比对检测,结果表明铝塑膜对甲酸、乙酸挥发的阻隔效果明显,甲酸、乙酸单位表面积乙酸挥发量均小于0.2 mg·m^(-3)·mm^(-2)。
All kinds of wood and man - made wood composites are used for the storage and display of museum objects. Volatile acids from these lumber materials are main concern in the museum environment. To evaluate the properties of these volatile acids from lumber materials commonly used for the storage or display of museum objects, 14 lumber boards were tested in airtight spaces, samples were heated at 40℃ to accelerate evaporation, volatile acids were collected using a no - power diffusive sampler for four hours, and the collected substances were analyzed semi - quantitatively by double- gradient ion chromatography. A fast evaluation method was explored and relevant experimental parameters are discussed. The results showed that red oak, camphorwood, treated basswood and treated raminwood have relatively high contents of formic acid and acetic acid. The acetic acid evaporated from these woods is more than 4 mg .m-3.mm -2 . mm-2 per surface unit for 4 hours, and this number of formic acid is higher than 0. 5 mg . m -3. mm-2 . With the aim of preventing volatile acids from polluting the plastic film were also tested. The results museum environment, lumber samples covered with aluminum of this study indicate that the aluminum plastic film can effectively decrease the volatilization of formic acid and acetic acid from wood. The release of both formic and acetic acids is reduced to less than 0.2 mg . m-3 . mm-2 each per surface unit.
出处
《文物保护与考古科学》
2010年第2期1-5,共5页
Sciences of Conservation and Archaeology
基金
国家科技支撑计划资助(2006BAK20B01)
关键词
藏展材料
木材
挥发性酸
检测方法
无动力扩散采样-离子色谱
Material for the storage of museum objects
Wood
Lumber
Volatile acids
No - power diffusive samplerion chromatography
