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林业科学 ›› 2005, Vol. 41 ›› Issue (2): 129-135.doi: 10.11707/j.1001-7488.20050222

• 论文及研究报告 • 上一篇    下一篇

纳米二氧化硅/脲醛树脂性能的研究

林巧佳 杨桂娣 刘景宏 饶久平   

  1. 福建农林大学,福州350002
  • 收稿日期:2004-09-13 修回日期:1900-01-01 出版日期:2005-03-25 发布日期:2005-03-25

Study on the Property of Nano-SiO2/Urea Formaldehyde Resin

Lin Qiaojia,Yang Guidi,Liu Jinghong,Rao Jiuping   

  1. Fujian Agriculture and Forestry University Fuzhou350002
  • Received:2004-09-13 Revised:1900-01-01 Online:2005-03-25 Published:2005-03-25

摘要:

探讨纳米SiO2 表面处理、加入方式、用量对纳米SiO2 脲醛树脂性能的影响。结果表明:采用KH-550硅烷偶联剂处理纳米SiO2 表面,用间歇式超声波震荡法将其加入脲醛树脂中,能有效改善树脂性能。当纳米SiO2 用量<15%时,用量越大,树脂的胶合强度越高,游离甲醛含量越低,粘度越大,固化时间不变。用纳米SiO2 (用量1% ) 脲醛树脂(F/U摩尔比1.2 )压制胶合板、刨花板、中密度纤维板,板的各项性能指标都超过国家标准要求,甲醛释放量达到E1 级水平。同时,通过红外光谱和X射线光电子能谱初步探索了纳米SiO2 对脲醛树脂的增强机制

关键词: 纳米SiO2, 脲醛树脂, 胶合强度, 游离甲醛, X射线光电子能谱

Abstract:

The effects of nano-SiO2 coupling agent, dispersing methods and its content on the properties of the urea formaldehyde (UF) resin were discussed. The test results indicated that when nano-SiO2, incorporated with KH-550 silane coupling agent, and was put into UF resin by discontinuous ultrasonic vibration, it had the best results. When the content of nano-SiO2 was below 1.5%,the content of free formaldehyde decreased,viscosity and bonding strength of resin increased with the nano-SiO2 added,which would not affect the curing time. The performance index of plywood, particleboard and medium density fiberboard(MDF) , pressed by nano-SiO2(1%)/ UF resin (F/U mole ratio=1.2), were above the demand of national standard and their dissociate formaldehyde release reached E1 grade. Furthermore, strengthening mechanism for the effects of nano-SiO2 on UF resin were analyzed by means of infrared (IR) spectrum analysis and X-ray photoelectronic spectrum (XPS).

Key words: nano-SiO2, UF resin, bonding strength, free formaldehyde, XPS