摘要
采用纳米SiO2 改性脲醛树脂, 当纳米SiO2 用量<1 5%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E级水平 通过红外光谱分析,
Nano-SiO_2 was used to modify urea formaldehyde (UF) resin. The test results showed that when the content of nano-SiO_2 was below 1.5%,bonding strength and viscosity of resin increased, free formaldehyde decreased with the nanometer silicon dioxide added,which would not affect the curing time. The performance index of plywood, flakeboard and medium density fiberboard(MDF),pressed by nano-SiO_2(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-SiO_2 on UF resin were revealed and summarized with Infrared (IR) spectrum analysis.
出处
《福建林学院学报》
CSCD
北大核心
2005年第2期97-102,共6页
Journal of Fujian College of Forestry
基金
福建省教育厅科学基金资助项目(K02052)
关键词
纳米SIO2
脲醛树脂
胶合强度
游离甲醛
人造板
红外光谱分析
nanometer silicon dioxide
UF resin
bonding strength
free formaldehyde
wood-based panels
infrared spectrum analysis
