林业工程学报2025，Vol.10Issue(3)：39-45,7.DOI:10.13360/j.issn.2096-1359.202406020
二乙二醇/纳米二氧化硅增韧三聚氰胺甲醛树脂的性能及其应用
Performance and application research of diethylene glycol/nano-silicon dioxide toughened melamine-formaldehyde resin
摘要
Abstract
Melamine-formaldehyde(MF)resin,widely used in impregnated film paper decorative panels,offers several advantages,including excellent water resistance,strong bonding properties,fast curing speed,and a colorless,transparent appearance after curing.However,due to the rigid triazine ring structure of MF resin,the high cross-linking density after curing significantly limits the movement between molecular chains,reducing its ability to absorb and disperse external stress.This leads to the increased brittleness in impregnated film paper.When used for plywood and wood-based composites,MF resin is prone to cracking due to its inability to accommodate the size changes caused by variations in the moisture content of the substrate.To solve the problems,MF resin was modified with diethylene glycol(DG)and nano-silicon dioxide(NS)as moderators and impregnated film paper and veneer plywood were prepared in this study.The chemical structure and thermal stability of MF resin,the tensile properties of impregnated film paper and the surface properties of decorative panels were tested.The following conclusions were draw:the addition of DG and NS increased the viscosity and solid content of the MF resin,and the chemical structure of MF resin changed after the modification,and chemical binding occurred between MF resin and modifier.The initial pyrolysis temperature of the modified resin decreased slightly,but the maximum weight loss rate temperature remained above 370℃,and the thermal stability was high.When the content of DG was 8.0%and the content of NS was 2.5%,the tensile strength of paper increased significantly from 2.40 MPa for MF to 4.41 MPa for MFDGNS5.When the content of NS was 1.0%,the elongation at break of paper increased from 2.86%for MF to 4.71%for MFDGNS2,whose increase rate was 64.69%.When NS contents were 1.0%and 1.5%,the minimum curvature radius of the crimp of the impregnated film paper was 7.5 mm,which was much smaller than that of MF resin impregnated film paper(12.5 mm),being consistent with the trend of elongation at break.When the content of NS was 1.5%,the wear value of impregnated film paper/veneer plywood reached the lowest value of 46 mg/(100 r),no bottom phenomenon,and the surface bonding strength reached the highest value of 1.50 MPa.When the NS additions were 1.0%and 1.5%,the cracking resistance level of impregnated film paper/veneer plywood was Level 4.The MF resin modified by DG and NS has the toughened properties and can prevent cracking of plywood.关键词
三聚氰胺甲醛树脂/二乙二醇/纳米二氧化硅/增韧防开裂改性/饰面胶合板Key words
melamine-formaldehyde resin/diethylene glycol/nano-silicon dioxide/toughening anti-cracking modification/veneer plywood分类
交通运输引用本文复制引用
胡恒,刘如,龙玲,孙玉慧..二乙二醇/纳米二氧化硅增韧三聚氰胺甲醛树脂的性能及其应用[J].林业工程学报,2025,10(3):39-45,7.基金项目
广西科技重大专项(桂科AA23062010). （桂科AA23062010）
