西北林学院学报2024，Vol.39Issue(1)：208-214,7.DOI:10.3969/j.issn.1001-7461.2024.01.28
纳米SiO2/MUG复合改性剂的制备及其改性材性能研究
Properties of Poplar Wood Modified by Nano-SiO2/Melamine Urea Glucose Composite
摘要
Abstract
To further enhance the dimensional stability of modified wood with melamine-urea-glucose(MUG)biomass resin,single or compounded silicon sources,SiO2,KH550(K5)and KH560(K6)were mixed with MUG to prepare five organic-inorganic hybrid compound modifiers,i.e.,K5/MUG,K6/MUG,Si/MUG,Si/K5/MUG,and Si/K6/MUG,which were then used to modify poplar wood.The effects of dif-ferent modifiers on the density,water absorption,dimensional stability and mechanical strength of poplar wood were investigated,and the best modifier was selected.SEM and FT-IR were used to analyze the dis-tribution of modifiers and the reaction with wood components,and to investigate synergistic effect of or-ganic and inorganic silicon and the interaction between modifier and wood.The results showed that all the compound modifiers had good permeability,with the absorption rate more than 200％,the weight gain was greater than 44％,and the water absorption rate was significantly lower than that of the untreated wood.Among the five compound modified woods,the Si/K5/MUG(5％KH550,1％nano-SiO2,and 30％MUG)modified wood had the lowest radial,tangential and volumetric swelling efficiency,which were 1.14％,2.13％and 3.20％,respectively.The bulking effect was the smallest as 8.1％,anti-swelling efficiency was the biggest as 77.5％,and the compression strength parallel to grain was the highest as 130.9 MPa,92.03％higher than that of the untreated wood.Nano-SiO2 can be more uniformly dispersed in MUG resin after being grafted and modified by KH550,and is coated and solidified in wood by resin.The organic-inor-ganic synergistic effect improves the cross-linking degree of the modifier and wood,and the rigidity of inor-ganic Si element increases the mechanical support strength of wood.Therefore,nano-SiO2 modified with organosilane can further improve the dimensional stability and mechanical strength of MUG modified wood.关键词
杨木/MUG生物质树脂/纳米SiO2/硅烷偶联剂/改性材性能Key words
poplar wood/MUG resin/SiO2 nanoparticle/silane coupling agent/modified wood property分类
林学引用本文复制引用
孔静,吕文华,胡极航,徐诗雨..纳米SiO2/MUG复合改性剂的制备及其改性材性能研究[J].西北林学院学报,2024,39(1):208-214,7.基金项目
中央级公益性科研院所基本科研业务费专项(CAFYBB2022MA001). （CAFYBB2022MA001）
