Scientia Silvae Sinicae ›› 2005, Vol. 41 ›› Issue (2): 129-135.doi: 10.11707/j.1001-7488.20050222
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Lin Qiaojia,Yang Guidi,Liu Jinghong,Rao Jiuping
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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
Lin Qiaojia;Yang Guidi;Liu Jinghong;Rao Jiuping. Study on the Property of Nano-SiO2/Urea Formaldehyde Resin[J]. Scientia Silvae Sinicae, 2005, 41(2): 129-135.
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URL: http://www.linyekexue.net/EN/10.11707/j.1001-7488.20050222
http://www.linyekexue.net/EN/Y2005/V41/I2/129