共查询到19条相似文献，搜索用时 218 毫秒
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ACQ和CuAz防腐处理对木材力学性能的影响 总被引：9，自引：2，他引：9
采用水溶性铜防腐剂(ACQ)和铜唑类防腐剂(CuAz)加压浸注处理臭冷杉木材,研究了药液处理浓度和后期干燥条件对木材抗弯弹性模量和抗弯强度的影响。t检验表明,本试验条件下,经两种防腐剂处理后,木材的抗弯弹性模量保持不变或略微增加。通过分析与对照素材试件的t检验比较,表明两种防腐剂处理前、后木材的抗弯弹性模量差异不显著。ACQ和CuAz防腐处理对木材抗弯强度有一定影响,ACQ处理使得木材抗弯强度整体上略有下降,而CuAz处理由于保持量相对较低,对木材抗弯强度未见明显下降趋势。后期干燥方式对木材抗弯强度亦未见明显规律性的影响。 相似文献
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含铜木材防腐剂的流失性能 总被引：2，自引：1，他引：1
依据AWPA E11-97标准,对不同配方含铜防腐剂的铜及三唑流失率进行了测定.结果表明,以氨水为配体的铜唑(CuAz)及ACQ制剂中,铜在木材中的固着率均高于乙醇胺,氨水有利于铜在木材中固着.乙醇胺为配体的CuAz及ACQ制荆中,低栽药量铜制剂的固着率均远高于高栽药量铜制剂.三唑制剂中含有铜,能降低戊唑醇的流失率,用乙醇作溶剂的戊唑醇的流失率相对较高,可达37%. 相似文献
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水载型木材防腐剂有效成分的加速固着方法 总被引：1，自引：0，他引：1
以铬化砷酸铜(CCA)为代表的水载型防腐剂,逐渐被其他主要有效成分为铜的水载型防腐剂取代,这类防腐剂中的.针对水载型防腐剂抗流失性差的缺点,介绍4种用于加速防腐剂中有效成分在木材中固着的方法,分析了这些方法对水载型防腐剂中有效成分的固着效果,并就如何加速ACQ中有效成分的固着研究进行了分析和展望. 相似文献
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《中南林业科技大学学报(自然科学版)》2015,(9)
Cu(Ⅱ)、Cr(Ⅵ)、As(Ⅴ)、季铵盐在一定条件下加入显色剂后生成的物质可对光选择性吸收,通过紫外-可见分光光度法测定络合物的吸光度实现对有效成分含量的测定。采用紫外-可见分光光度法测定木材防腐剂CCA(加铬砷酸铜)和ACQ(氨/胺溶季铵铜)木材防腐剂中铜、铬、砷和季铵盐的含量。结果表明:此法重复性和准确性良好,相对标准偏差均在2%之内,加标回收率为95%~105%,与化学分析法比较,相对偏差在-5%~5%之内,准确度高,简便易行,可用于大批试样的分析。 相似文献
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Sye Hee Ahn Sei Chang Oh In-Gyu Choi Ho-Yong Kim In Yang 《Journal of Wood Science》2008,54(6):495-501
As a substitute for high-cost copper azole (CuAz) and alkaline copper quaternary (ACQ) wood preservatives, alternative wood
preservatives were formulated with okara, which is an organic waste from the production of tofu, and copper chloride and/or
borax. Each preservative was used in treatment of wood blocks in a reduced-pressure method to measure its treatability. The
treated wood blocks were placed in hot water for 3 days to examine the stability of the preservatives against hot-water leaching.
The preservatives successfully penetrated into wood blocks, probably due to the use of ammonium hydroxide as a dissociating
agent. However, the stability of okara-based preservatives dropped as the concentration of acid in the solutions used for
hydrolysis of okara increased. The treatability and leachability of the preservatives were not affected by hydrolysis temperature
but were negatively affected by the addition of borax. Leached wood blocks treated with okara-based preservatives and exposed
to decay fungi Gloeophyllum trabeum and Postia placenta over 12 weeks showed good decay resistance. Okara-based wood preservatives can protect wood against fungal attack as effectively
as CuAz, and have potential for use as environmentally friendly wood preservatives. 相似文献
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Sedric Pankras Paul A. Cooper Lucie Coudert Jean-Francois Blais Guy Mercier 《Wood Science and Technology》2014,48(2):393-409
Remediation of copper-based alkaline copper quat (ACQ) and micronized copper quat (MCQ) wood-preservative-treated weathered southern pine mulch samples by monoethanolamine (Mea) extraction was studied. The potential reuse of Mea extract in ACQ wood preservative application was also evaluated. Continuous column extraction of copper-preservative-treated samples for 32 h, using 12 % Mea removed 66–86 % (between top and bottom of the column) and 65–80 % of Cu, respectively, from ACQ- and MCQ-treated wood. Mea extracts of treated wood could be reused in ACQ-treating solutions that met the American Wood Protection Association standard specifications for ACQ wood preservatives. This was achieved either by mixing the extract with industrial Cu–Mea solution at 1:4 ratio or by adding cupric acetate salt directly into the Mea extract. ACQ-treating solutions reformulated using Mea extracts of ACQ- and MCQ-treated wood performed similarly to wood treated with industrial ACQ solution and freshly prepared solution using cupric acetate. All treated wood had similar penetrations of Cu in wood during preservative treatment, Cu leaching from the treated wood in contact with water, corrosion of nails in contact with treated wood, and ability to protect wood from mold growth. 相似文献
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几种防腐剂处理的马尾松材室内抗家白蚁（Coptotermes formosanus Shiraki）效果试验 总被引：1，自引：0，他引：1
利用三种防腐剂处理后的马尾松（Pinus massoniana Lamb．）边材在室内接种家白蚁（Coptotermes formosanus Shiraki）以测试其抗蚁蛀能力。这三种防腐剂包括含砷铬类防腐剂铜铬砷（CCA）和两种非含砷铬类防腐剂柠檬酸铜（CC）、季铵铜（ACQ）。测试一个月后的结果表明,三种防腐剂的各个测试浓度的抗蚁蛀效果很好,试块的失重均不超过5％。经方差分析及平均数多重比较结果表明,三种防腐剂不同处理浓度与对照间试块的实际失重的差异以及白蚁存活率的差异均达显著水平（P〈0．05）。CCA防腐剂在0．05％～1．00％浓度（实际吸药量0．60～6．07kg／m^3）处理下,白蚁全部死亡,试块表面被轻度蛀食。CC与ACQ防腐剂的抗蚁蛀效果很相似,在0．6％～2．0％高浓度（实际吸药量分别为3．94～12．90kg／m^3和3．04—9．92kg／m^3）下,白蚁全部死亡,试块未被白蚁蛀食,完好无损;但在0．2％～0．4％低浓度（实际吸药量〈3kg／m^3）下有部分白蚁存活,试块被白蚁轻度或中度蛀食;低浓度组与高浓度组之间白蚁存活率的差异达显著或极显著水平。从白蚁存活率、试块的失重及试块抗蚁蛀等级综合分析结果表明,经CCA、CC、ACQ三种防腐剂处理后的马尾松木材的抗蚁蛀能力明显提高。 相似文献
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Influence of Ammoniacal Copper Quaternary treatments on mechanical properties of blue-stained Lodgepole Pine wood 总被引：1，自引：0，他引：1
Three concentrations （2.8%, 2.0%, 1.2%） of Ammoniacal Copper Quaternary （ACQ） was selected to treat Lodgepole pine wood for evaluating ACQ treatment on mechanical properties of blue-stained wood. The bending modules of elasticity （MOE）, modules of rupture （MOR）, toughness and shearing strength parallel to grain on tangential surface, are tested according to the criteria GB1927-1943-91. Non-treated sample were also tested according to the same procedure. The results showed that the three groups specimen impregnated by different concentrations of ACQ solution met the AWPA standard 2003 of America （UC4A 6.4g/cm^3）. There were significant difference of toughness between treated wood and non-treated wood （p=0.01）, but there were no statistically significant differences among three concentrations in terms of toughness, and toughness of treated wood was approximately 20% lower than non-treated. MOR, MOE as well as sheafing strength parallel to grain were found to be not significantly different between treated wood and non-treated one, and there were no statistically significant difference among three concentrations of ACQ too. Toughness, MOR, MOE and sheafing strength parallel to grain increased with decrease of concentration of ACQ, but they were hardly affected by ACQ preservatives. 相似文献
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ZHANG Ying JIANG Mingliang Research Institute of Wood Industry Chinese Academy of Forestry Beijing P.R.China 《中国林业科技(英文版)》2007,6(2):25-29
The corrosive rates of 4 types of metals as well as epoxy-coated metal in a variety of preservatives derived from different copper sources and ingredients were .measured in this paper. The main results show that： CCA is less corrosive to red brass and Q235A steel than other copper formulations; Copper-based preservatives such as ACQ and CuAz derived from basic cupric carbonate or cupric hydroxide are much less corrosive to Q235A steel than those from cupric sulfate; Ethanolamine is less corrosive to Q235A steel than ammonia in ACQ derived from cupric hydroxide, while other ingredients are the same; Epoxy resin coating could be used for protecting red brass, Q235A steel and zinc hotdipped galvanized mild steel from corrosion. 相似文献
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加铬砷酸铜(CCA)作为木材防腐剂在世界范围内已经广泛使用了70余年,目前在我国其仍然是主要的木材防腐剂之一.然而.CCA 中有效成分铬和砷的氧化物所具有的剧毒性,使其在使用过程中流失到外界后会对环境及生物安全造成威胁,而防腐剂中有效成分的流失在很大程度上是由于防腐处理材在使用前防腐剂的有效成分与木材成分之间的固着反应不充分而造成的.对CCA中有效成分在处理材中的固着反应过程、监测方法及反应场所等做了详细介绍,旨在为水基木材防腐剂有效成分在处理材中的固着、流失研究提供借鉴,并为CCA防腐处理材的生产提供理论指导. 相似文献