糠醇树脂浸渍强化人工林速生杨树木材的性能
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摘要
为探讨糠醇树脂浸渍强化速生杨树木材性能的效果,分别以马来酸酐和柠檬酸为催化剂,配制不同质量分数的糠醇树脂改性液,采用真空—加压法对速生杨树木材进行浸渍处理,对浸渍材和素材的力学性能、尺寸稳定性、耐久性进行了对比研究。结果表明:浸渍处理后杨木的静曲强度、弹性模量和硬度有所增强,干缩率、湿胀率和吸水率显著降低,浸渍材的防霉防蓝变性、耐腐性和抗虫蛀性能均显著优于素材。当以2%的马来酸酐为催化剂、糠醇树脂质量分数为50%时,杨木的各项性能改善效果最佳。
In order to investigate the effect of furfuryl alcohol resin impregnation to enhance the performance of fast-growing poplar,different contents of furfuryl alcohol resin modification liquid were prepared by maleic anhydride and citric acid as catalysts,respectively. The impregnation treatment of fast-growing poplar was carried out by vacuum-pressing method. The mechanical properties,dimensional stability and durability of impregnated wood and poplar material were compared. The static bending strength,elastic modulus and hardness of poplar wood were enhanced after immersion treatment; the shrinkage rates,swelling rates and water absorption rates were significantly reduced; the mildew resistance,blueness resistance,corrosion resistance and insect resistance of the impregnated materials were all significantly better than the material. When2% maleic anhydride was used as a catalyst and the concentration of furfuryl alcohol was 50%,the performance improvement effect of poplar was the best.
In order to investigate the effect of furfuryl alcohol resin impregnation to enhance the performance of fast-growing poplar,different contents of furfuryl alcohol resin modification liquid were prepared by maleic anhydride and citric acid as catalysts,respectively. The impregnation treatment of fast-growing poplar was carried out by vacuum-pressing method. The mechanical properties,dimensional stability and durability of impregnated wood and poplar material were compared. The static bending strength,elastic modulus and hardness of poplar wood were enhanced after immersion treatment; the shrinkage rates,swelling rates and water absorption rates were significantly reduced; the mildew resistance,blueness resistance,corrosion resistance and insect resistance of the impregnated materials were all significantly better than the material. When2% maleic anhydride was used as a catalyst and the concentration of furfuryl alcohol was 50%,the performance improvement effect of poplar was the best.
引文
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[15]何莉,余雁,喻云水,等.糠醇树脂改性杉木的尺寸稳定性及力学性能[J].木材工业,2012,26(3):22-24.
[16] LI W,REN D,ZHANG X,et al. The furfurylation of wood:A nanomechanical study of modified wood cells[J]. Bioresources,2016,11(2):3614-3625.
[17]孙丰文,彭晓晓,刘龙龙.2D树脂整理剂用于杨木板材的改性研究[J].林业科技开发,2015,29(5):98-102.
[18] NORDSTIERNA L,LANDE S,WESTIN M,et al. Towards novel wood-based materials:Chemical bonds between lignin-like model molecules and poly(furfuryl alcohol)studied by NMR[J]. Holzforschung,2008,62(6):709-713.
[2]佚名.中国森林现状点评[J].中国林业,2005(22):38.
[3]李坚.木材保护学[M].哈尔滨:东北林业大学出版社,1999.
[4]贺宏奎.速生杨木材压缩及树脂浸渍密实化研究[D].北京:北京林业大学,2006.
[5]牛炳华.糠醇树脂的生产和发展[J].化工科技市场,2003,26(1):26-29.
[6]徐敏,马青,王天龙.不饱和聚酯树脂改性对杨木尺寸稳定性的影响[J].木材加工机械,2017(1):23-26.
[7]谢延军,符启良,王清文,等.木材化学功能改良技术进展与产业现状[J].林业科学,2012,48(9):154-163.
[8]柴宇博,刘君良,吕文华,等.一种多功能木材浸渍用树脂改性剂的制备方法及应用:CN104070572A[P].2014-10-01.
[9]刘玉,陈广胜,朱晓冬,等.脲醛树脂浸渍工艺对杨木单板尺寸稳定性影响[J].森林工程,2017,33(6):36-40.
[10] EPMEIER H. Differently modified wood:comparison of some selected properties[J]. Scandinavian Journal of Forest Research,2004,19(s5):31-37.
[11] LANDE S,WESTIN M,SCHNEIDER M. Development of modified wood products based on furan chemistry[J]. Molecular Crystals&Liquid Crystals,2008,484(1):367-378.
[12] LANDE S,WESTIN M,SCHNEIDER M. Properties of furfurylated wood[J]. Scandinavian Journal of Forest Research,2004,19(s5):22-30.
[13] EPMEIER H,JOHANSSON M,KLIGER R,et al. Bending creep performance of modified timber[J]. Holz Roh-Werkst,2007,65(5):343-351.
[14]李万菊,喻云水,何莉,等.基于复配催化剂的马尾松糠醇树脂改性技术研究[J].林产工业,2013,40(6):25-28.
[15]何莉,余雁,喻云水,等.糠醇树脂改性杉木的尺寸稳定性及力学性能[J].木材工业,2012,26(3):22-24.
[16] LI W,REN D,ZHANG X,et al. The furfurylation of wood:A nanomechanical study of modified wood cells[J]. Bioresources,2016,11(2):3614-3625.
[17]孙丰文,彭晓晓,刘龙龙.2D树脂整理剂用于杨木板材的改性研究[J].林业科技开发,2015,29(5):98-102.
[18] NORDSTIERNA L,LANDE S,WESTIN M,et al. Towards novel wood-based materials:Chemical bonds between lignin-like model molecules and poly(furfuryl alcohol)studied by NMR[J]. Holzforschung,2008,62(6):709-713.