为拓展单板层积材(LVL)的应用领域,延长其使用寿命,通过季铵铜(ACQ)和铜唑(CuAz)常压浸渍单板,研制防腐马尾松单板层积材(LVL),考察了防腐剂种类和载药量对LVL耐腐及物理力学性能的影响。结果表明:ACQ和CuAz预处理单板显著提高了马尾松LVL耐腐性,处理材达到强耐腐等级; 处理材的弹性模量和静曲强度达到GB/T 20241—2006标准规定的结构用LVL中120E至160E级别要求,剪切强度达到50V-43H级别要求,浸渍剥离率仅为0.1%～0.8%。与未处理材相比,处理材的弹性模量略有增加,剪切强度及部分处理材的静曲强度有所下降; 但处理材之间、处理材与对照材之间的力学性能均无显著差异。研究表明,ACQ和CuAz常压浸渍预处理单板是研制防腐马尾松LVL的一条有效途径。
Abstract
To expand the application and extend the service life of laminated veneer lumber(LVL)products, this study focused on the development of preservative-treated masson pine LVL using the non-pressure veneer soaking treatment with alkaline copper quaternary(ACQ)and copper azole(CuAz). The effects of veneer treatments with preservative types and loading levels on the decay resistance, physical and mechanical properties of LVL were investigated. The results demonstrated that the treatments significantly enhanced the decay resistance of LVL. The bending properties of treated LVL met the requirements of grade 120E to 160E, while the shear strength exceeded the specification of grade 50V-43H according to the standard GB/T 20241—2006. All treated LVLs had low delamination rate ranging from 0.1% to 0.8%. The statistical analysis showed that there were no significant differences in physical and mechanical properties among treated and untreated groups. The study suggested that ACQ and CuAz pretreatment is a promising method to make masson pine LVL with strong decay resistance and required physical and mechanical properties.
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参考文献
[1] Hayashi T, Atsushi M, Fu F, et al. Outdoor exposure tests of structural laminated veneer lumber(II): evaluation of the strength properties after nine years[J]. Journal of Wood Science, 2005, 51(5):486-491. Doi:10.1007/s10086-004-0677-4.
[2] Nzokou P, Zyskowski J, Boury S, et al. Natural decay resistance of LVL made of veneers from durable and non-durable wood species[J]. Holz als Roh-und Werkstoff, 2005, 63(3): 173-178. Doi:10.1007/s00107-004-0548-0.
[3] 杨忠, 马星霞, 刘磊, 等. GB/T 13942.1-2009 木材天然耐久性能第1部分:天然耐腐性实验室试验方法[S]. 北京: 中国标准出版社, 2009.
[4] Kimmel J D, Janowiak J J, Baileys R T, et al. Characteristics of creosote-treated LVL materials[J]. Forest Products Journal,1994, 44(5): 45-53.
[5] Gomben P C, Gorman T M. Treatability of lodgepole pine laminated veneer lumber[J]. Forest Products Journal, 1994, 44(2): 39-41.
[6] American Wood Protection Association. Standard T1-12 use ca-tegory system: processing and treatment[S]. The American Wood Protection Association, Birmingham, AL, USA, 2012.
[7] 金菊婉,周定国. 木质复合材料防腐方法综述[J]. 南京林业大学学报(自然科学版),2009, 33(6): 121-126.Doi:10.3969/j.issn.1000-2006.2009.06.028.
Jin J W, Zhou D G. A review of preservation methods for wood-based composites[J]. Journal of Nanjing Forestry University(Natural Sciences Edition), 2009, 33(6): 121-126.
[8] Colakoglu G, Colak S, Aydin I, et al. Effect of boric acid treatment on mechanical properties of laminated beech veneer lumber[J]. Silva Fennica, 2003, 37(4):505-510. Doi:10.14214/sf.488.
[9] Özçifçi A, Örs Y, Uysal B. Determination of some physical and mechanical properties of laminated veneer lumber impregnated with boron compounds[J]. Journal of Applied Polymer Science, 2007, 105: 2218-2224.
[10] 蒋明亮,李玉栋,田振昆,等. GB/T 27651—2011. 防腐木材的使用分类和要求[S]. 北京: 中国标准出版社, 2011.
[11] Freeman M H, McIntyre C R. A Comprehensive review of copper-based wood preservatives[J]. Forest Products Journal, 2008, 58(11): 6-27.
[12] Yang T H, Lin C H, Wang S Y, et al. Effects of ACQ preservative treatment on the mechanical properties of hardwood glulam[J]. Eur J Wood Prod, 2012, 70: 557-564.
[13] Shukla S R, Kamdem D P. Effect of copper based preservatives treatment of the properties of southern pine LVL[J]. Construction and Building Materials, 2012, 34: 593-601. Doi:10.1016/j.conbuildmat.2012.02.009.
[14] 全国人造板标准化技术委员会. GB/T 20241—2006 单板层积材[S]. 北京: 中国标准出版社, 2006.
[15] 住房和城乡建设部. GB/T 50772—2012 木结构工程施工规范[S]. 北京:中国建筑工业出版社,2012.
[16] 广西建设工程质量安全监督总站. GB 50206—2012 木结构工程施工质量验收规范[S].北京:中国建筑工业出版社,2012.
[17] 全国木材标准化技术委员会. GB/T 27654—2011 木材防腐剂[S]. 北京: 中国标准出版社, 2011.
[18] 全国木材标准化技术委员会. LY/T 1283—2011 木材防腐剂对腐朽菌毒性实验室试验方法[S]. 北京: 中国标准出版社, 2011.
[19] Lin L, Chen Y, Wang S, et al. Leachability, metal corrosion, and termite resistance of wood treated with copper-based preservative[J]. International Biodeterioration & Biodegradation, 2009, 63, 533-538.
[20] Frihart C R. Interaction of copper wood preservatives and adhesives[C]//Anderson G L. Proceedings of 26th Annual Meeting of the Adhesion Society. Blacksburg, VA, USA, 2003.
[21] Lee D H, Lee M J, Son D W, et al. Adhesive performance of woods treated with alternative preservatives[J]. Wood Science and Technology, 2006, 40(3): 228-236. Doi:10.1007/s00226-005-0036-7.
[22] Winandy J E. The effects of waterborne preservative treatment on mechanical properties: A review[C]//American Wood Preservers' Association. Proceedings of 91st Annual Meeting of the American Wood Preservers' Association. Woodstock, MD, USA,1995.
[23] Kardos J L. The role of the interface in polymer composites-some myths, mechanisms, and modifications[C]//Ishida H, Kumar G. Molecular Characterization of Composites Interfaces. New York: Plenum Publishing Corp, 1985: 1-11.
基金
收稿日期:2015-09-25 修回日期:2015-12-22
基金项目:江苏省高校自然科学研究重大项目(11KJA220001); 贵阳市科技计划项目(筑科合同[2012101]4-20号); 江苏高校优势学科建设工程资助项目(PAPD)
第一作者:金菊婉(jjw@njfu.edu.cn),教授,博士。
引文格式:金菊婉,王锦涛,姬宁,等. 季铵铜和铜唑预处理对马尾松单板层积材性能的影响[J]. 南京林业大学学报(自然科学版),2016,40(4):119-124.
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