共查询到19条相似文献,搜索用时 625 毫秒
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介绍了木材诱发变色的变色机理, 从光变色和热变色2个方面分析了木材变色是内因在外因的诱导下发生的自身化学成份的变化, 探讨了材色的评价方法、诱发变色及变色的防护方法, 并指出木材诱发变色的研究方向。 相似文献
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木材资源的多元化利用符合可持续发展国家战略方针。但木材在使用过程中会由于内部或外界因素产生变色,造成木材性能劣化,直接影响木材及其制品的质量。因此,研究木材变色机理以缓解木材缺陷具有现实意义。目前已有大量研究集中于木材随环境因子的变色规律,但仍存在环境条件考虑单一、化学结构变化规律不明确等问题。文中将变色木材的主体分为活立木和木材加工产品2类,分别对其变色的内因和外因进行总结;分析目前研究中存在的问题和未来研究方向,以期通过总结已知环境因子对木材变色的作用,服务于各因子协同作用下木材变色结果的研究,为减少木材变色缺陷和定向调控木材颜色提供研究思路,并为提高木材综合性能、拓展木材及其制品的应用范围提供参考。 相似文献
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木材变色与防护问题的研究状况 总被引:5,自引:1,他引:5
介绍了目前国内外木材变色问题研究的有关情况。木材变色是木材内因在外因的诱导和诱发下发生的自身化学成分的氧化、聚合和降解等反应。对木材变色的防护,均是针对木材的变色类型,结合木材的具体情况进行的。 相似文献
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木、竹、藤材的变色防治 总被引:5,自引:0,他引:5
对木材变色的机理、类型、成分和影响因素, 木材变色的预防和消除以及生物防治等研究的最新成果进行了概括总结, 综合论述了木材、竹材和藤材的变色防治研究现状, 得出以下几点结论:(1)低毒或无毒、高效、多功能的防变色剂的研制开发仍是木材工业变色防治研究的重要研究方向。(2)开展色变脱除, 恢复已变色材原有颜色和价值方面的研究很有必要。(3)以菌治菌的生物防治, 污染小, 成本低, 应加强其理论研究和实践应用。(4)通过热处理或光辐射等手段, 诱导木、竹、藤材变色, 进行调色处理, 将成为新的研究方向。(5)与木材相比, 竹材、藤材变色的研究落后, 尤其是藤材变色, 应得到进一步加强。 相似文献
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3种棕榈藤藤材防变色的研究 总被引:5,自引:0,他引:5
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. 相似文献
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3种棕榈藤藤材变色的研究 总被引:7,自引:2,他引:7
棕榈藤(rattan)是热带和亚热带森林中多用途植物,是仅次于木材和竹材的林产品,具有很高的经济价值(许煌灿等,1993;1999)。自古以来,藤主要用来制作家具,在我国藤家具制造业已有100多年的发展历史。藤家具美观、轻便、耐用,深受人们喜爱,产品畅销国内外。但是,藤材的变色影响了藤条的质量和等级,进而影响商品的外观,左右商品的价值。变色原因有多种,生物的(如微生物繁殖)、化学的(如金属离子、酸碱作用)及物理的(如光和热)等(村神哉等,1979;陆文达,1993;村神哉,2002)。藤材变色有霉菌引起的霉变色,还有因藤材及其制品长时间暴露而导致颜… 相似文献
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Causes of color changes in wood during drying 总被引:3,自引:0,他引:3
The forest industry operates in a dynamic and global market where change and competition are the rule rather than the 相似文献
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GaoJianmin ZhangBiguang ChangJianmin 《中国林学(英文版)》2004,6(2):50-55
Buerger maple (Liquidambarformosana Hance) is a kind of wood that is easily discolored. This paper tries to obtain satisfactory color and a broad prospect in the utilization of buerger maple by induced discoloration. The authors analyze the mechanism of induced discoloration of buerger maple based on the analysis of visual physical parameter, the infrared spectrum (IRS) and the scanning electron microscope (SEM) under different drying conditions. The result shows that it is feasible to induce discoloration during the drying process. The wood color tends to be red and fuscous during inducing discoloration of buerger maple.The induced discoloration mechanism is: 1) the high temperature and humidity accelerates the oxidation reaction of polyphenol,leuco-fancy pigment and tannin, which changes the wood color to red; 2) the hydroxy (-OH) is oxidized and the carbonyl (-C=0),carboxyl (-COOH), ester and ketone groups form during the high temperature steaming, which results in wood piece discoloration. 相似文献
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JIANG Zehui LV Wenhua** FEI Benhua REN Haiqing WU Yuzhang ChineseAcademyof Forestry Beijing P. R. China 《中国林业科技(英文版)》2006,5(2):1-6
Wood color is an important factor to determine wood impression. It is also the most vivid and active factor in furniture and interior decoration design. It is an important index to evaluate wood commercial value, and strongly influences wood sale competition power. Wood discoloration is the change of normal wood color. Plywood, veneer, furniture and decorative wood products have some limits on wood discoloration, and export products have also strict limit on it. Discoloring of biomass wood is… 相似文献
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Zhou Yu Iida Ikuho Minato Kazuya Kurosu Hiroshi 《中国林学(英文版)》2005,7(2):19-25
The adsorptive properties and selectivity of dyes and water molecules to cellulosic sheet, dependence of adsorptive properties of dyes on the concentration of dye solution, and discoloration of the dye solution due to the UV-ray irradiation were determined for 18 kinds of commercial dyes. The results are as follows: 1) the adsorptive properties of dyes to cellulose sheet differed greatly, but did not depend on the dye types such as acidic, basic and so on; 2) adsorptive properties of dyes to cellulosic sheet de- pended on the concentration of dye solution and were classified into 4 types: concentration-independent, increasing or decreasing with dye concentration, and having a maximum. This classification was irrelevant to the dye types; 3) the irradiation of UV-ray did not cause significant discoloration of dye solution itself, which suggested that wood components as well as dye molecules influence the discoloration of wood. 相似文献
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