共查询到19条相似文献，搜索用时 171 毫秒
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《林业实用技术》2016,(1)
采用酸性大红GR染料和BL-阻燃剂同步处理杨木单板,通过改变浸渍温度、BL-阻燃剂浓度、酸性大红GR染液浓度等工艺参数,分析酸性染料和阻燃剂同步处理对杨木单板性能的影响。结果表明:BL-阻燃剂的添加明显提高了单板的上染率,且BL-阻燃剂浓度为10%时上染率最大为23.97%,氧指数和色差随BL-阻燃剂浓度的增加而增大,最大值分别达到46.3%和72.346;随着酸性大红GR染液浓度的增加,单板上染率在浓度为0.1%时达到峰值,而氧指数呈减小趋势,色差逐渐增大再减小;浸渍温度对单板性能影响显著,单板上染率、氧指数和色差随温度升高均增大,80℃最大值分别是34.18%、42.7%和73.257。 相似文献
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以三层实木复合地板为对象,探讨阻燃剂对其生产工艺的影响,结果表明:芯板、背板浸渍阻燃剂时,单板的增重率随着浸渍时间的延长而增加,当浸渍时间超过30 min后,增重率增加不明显;随着阻燃剂施加量增加氧指数增大,含水率、静曲强度随着施加量增加而降低;含水率、静曲强度、甲醛释放量和氧指数随着涂胶量的增加而增大;热压温度和热压时间对含水率、静曲强度、甲醛释放量和氧指数影响不明显。最佳热压工艺条件为:阻燃剂施加量8%,涂胶量360g·m-2,热压温度120℃,热压时间12 min。 相似文献
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选用3种自制阻燃剂浸渍思茅松单板,通过测试胶合板的胶合强度、氧指数和烟密度,分析阻燃剂对胶合板的胶合强度和燃烧性能的影响.研究结果表明:工业制备阻燃胶合板的胶合强度、氧指数、烟密度等级满足国家标准GB/T 17657和GB 8624-2006的要求,说明工业生产阻燃胶合板是可行的.与对照试件相比较,阻燃胶合板的氧指数提高了75.8％～149.8％、烟密度等级降低了15.4％～60.5％、胶合强度降低了43.9％ ～ 56.1％;其中阻燃剂FR-B对胶合板氧指数影响最大,阻燃剂FR-A对胶合板的烟密度影响最大,阻燃剂FR-C对胶合板的胶合强度影响最小. 相似文献
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采用亚麻屑为原料，利用脉酸胶和阻燃剂热压制成阻燃亚麻屑板。试验结果表明：根据亚麻屑原料的形态和特性，可采用粉状阻燃剂直接与子亚麻屑混合的添加工艺。当阻燃剂加量为15％时，阻燃板物理力学性能指标均达到国家标准。阻燃性能：氧指数达到43％。 相似文献
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阻燃剂WFRJ1改性木材的体积稳定性和涂饰性能 总被引：3，自引：0，他引：3
用阻燃剂ＷＦＲＪ１处理大青杨木材并对处理材的阻燃性能、涂饰性能和体积稳定性进行测定。结果表明：ＷＦＲＪ１可用于木制品的阻燃处理。当ＷＦＲＪ１浓度为１０％时,氧指数可达到５０％以上,与水溶性ＲＦ树脂复配,可大幅度提高处理材的抗胀缩率和阻湿率,增加体积稳定性。经ＷＦＲＪ１处理后杨木单板的涂饰性能未受影响。 相似文献
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《竹子研究汇刊》2016,(4)
选用聚磷酸氢铵(APP)、磷酸二氢氨盐(MAP)及硼酸与硼砂合剂(SBX)3种阻燃剂,采用常压浸渍法处理竹片,通过氧指数、锥形量热法考察了3种阻燃剂对竹片阻燃性能的影响,并研究了阻燃竹片的涂饰性能及阻燃剂的流失行为。结果表明,3种阻燃剂均可提高竹片的极限氧指数,MAP处理竹片的极限氧指数最高;正交试验得出优选浸渍工艺为:20%阻燃剂浓度、40℃浸渍温度和0.5 h浸渍时间。锥形量热测试结果表明,3种阻燃剂均能有效降低热释放速率、热释放总量,并抑制发烟,SBX处理竹材的综合性能最佳。涂饰性测试表明,SBX阻燃剂不影响竹片表面的漆膜附着力,而APP和MAP阻燃处理使竹片表面漆膜附着力显著下降。流失性测试表明3种阻燃剂抗流失性较差,SBX处理竹片相对较好,14 d流失率为53%。 相似文献
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阻燃刨花板阻燃剂的研制 总被引：4，自引：0，他引：4
以氨基树脂为载体,磷-氮系阻燃液与固体无机耐火剂所构成的刨花板用阻燃体系,采用阻燃剂与刨花直接混合的添加工艺,不会造成阻燃剂的浪费,不污染环境。所生产的阻燃刨花板主要物理力学性能达到国家标准。阻燃性能:氧指数40%～50%.1000℃火焰穿透时间15～25分钟,发烟等级为一级。对人低毒。 相似文献
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INTRoDUCTIoNThechemicalscommonlyusedforflameretardantstowoodincludeammoniumphosphate,phosphoricacid,boricacid,borax,hydratedalumna,am-moniasulfate,zincchlorideandmagne--siumcNoridetl'2j.Thesechemicalsareimpregnatedasaqueoussolutionsintothewoodwheretheyaredepositedwithintheporesandcapillariesofthewoodwhenthesolutionevaporates.Butthesechemicalsarenotsuitableforexteriorandunder-groundconstructionwheretheflameretardantsareleachedeasily[3:.Nowanimportantdevelopmentorientationofstudyingonflamere… 相似文献
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Xiaoqian Wang Fang Wang Zhiming Yu Yang Zhang Chusheng Qi Lanxing Du 《Journal of Wood Science》2017,63(3):271-280
The use of multifunctional wood for decorative purpose has grown increasingly popular in recent years. In this study, fast-growing poplar wood was treated with dye (0.5%) and flame retardant (0, 10, 20, and 30%) simultaneously to enhance its visual characteristic and safety. The dynamic wettability and surface free energy of wood samples were studied using S-D wetting model and van Oss–Chaudhury–Good (vOCG) method, respectively. Dye uptake, drug load, color difference, and combustion performance were determined. The treated wood was also characterized by infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The results indicated that the proposed treatment yields favorable adhesive spreading and penetration ability at the wood surface. The surface free energy of treated wood was higher than that of untreated wood, and the dye uptake, drug load, color difference, and limited oxygen index all increased after the proposed combination treatment compared to dye-only treated wood. The results also indicated that the flame retardant reacted chemically with the wood as the dye and flame retardant molecules diffused into the cell cavity, wood vessel, and aperture. 相似文献
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木材结构特性对氧指数的影响 总被引：2，自引：0，他引：2
采用氧九法对４种树种木材、５种阻燃物质燃烧特性的研究发现，未阻燃木材的氧指数在纵横向上有差异性，纵向高于横向，径弦向差异很小。这主要是木材结构各向异性以及各方向上的导热系数不同所致。木材树种不同氧指数也有差异，原因之一密度不同所致。阻燃处理可使方向上的的差异逆转，即横向高于纵向。同一阻燃物质对不同树种木才的作用效果不同，即树料与阻燃物质之间存在适应性问题。树种铎氧指数有很大影响。 相似文献
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To enhance dimensional stability and biological properties, low molecular weight phenolic resins of a conventional alkaline type and neutralized type were impregnated into Japanese cedar wood (Cryptomeria japonica D. Don) and heat-cured. The treatment with the neutralized type resin retained the original wood color, whereas the alkaline treatment changed the color of wood to red-brown. The concentrations of the resin solutions and the weight gains due to the resin loading of wood after treatment were highly correlated, and the target resin loading could be assessed from the solution concentration. A high dimensional stability of 60% antiswelling efficiency was attained when both types of resins were impregnated at about 30% resin loading and no significant difference was recognized between the two. To suppress decay attack from brown-rot and white-rot fungi, 15% and 10% resin loading due to treatment was required for the neutralized and alkaline types of phenolic resins, respectively. The penetration of resin into wood cell walls was investigated by means of light microscopy, Scanning Electron Microscopy (SEM), and Electron Probe X-ray Microanalysis (EPMA). A m-Bromophenol-formaldehyde resin of three levels of an average molecular weight was used to detect the presence of resin by bromine signals. The phenolic resins with low and medium molecular weights (290 and 470) were shown to penetrate into the cell walls the furthest, thereby contributing to the enhancement of dimensional stability and decay resistance in the resin-impregnated wood. Also, for phenolic resin with a high molecular weight (820), only the resin components of low molecular weight appeared to be present in the walls, making very little contribution to the dimensional stability. 相似文献
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We improved the overall performance of fast-growing poplar by utilizing a low-cost, effective and simple method. The fast-growing poplar was modified by a vacuum-pressure impregnation method with three... 相似文献
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考察了三乙醇胺(TEM)对3种木材阻燃剂(F1、F2、DPB)处理试件的载药率、阻燃效果、吸湿性的影响。试验结果表明:随三乙醇胺加入量的增加,阻燃试件的载药率增加,氧指数增加,阻燃效果得到改善;三乙醇胺加入量大于3.5%时,处理液的黏度增加,载药率增加不明显;加入2.5%～3.5%的三乙醇胺时,处理试件的吸湿率最小。同时实验还显示了在3种木材阻燃剂中加入三乙醇胺后,只有F2与三乙醇胺有协同效应,其它两种阻燃剂协同效应不明显。 相似文献