木材科学与技术2025，Vol.39Issue(6)：43-52,61,11.DOI:10.12326/j.2096-9694.2025058
漂白-浸渍-热压协同改性泡桐木材的制备及性能表征
Preparation and Performance Characterization of Paulownia Wood Modified Using Bleaching-Impregnation-Hot Pressing Synergistic Method
摘要
Abstract
Paulownia fortunei suffers from insufficient tensile strength,high flammability,and susceptibility to mold,which severely limit its application in furniture and architectural decoration materials.To address these issues,this study proposes a synergistic method combing bleaching,impregnation,and hot pressing.First,Paulownia fortunei was bleached with 30%hydrogen peroxide(H2O2)for 3 hours,preserving its natural porous structure and partial lignin content while increasing interfacial binding sites.The bleached wood was subsequently immersed in a 4%chitosan(CS)solution under a vacuum of-0.1 MPa for 30 minutes.Afterwards,a 40%sodium silicate(Na2SiO3)solution was uniformly applied to the wood surface.Finally,the impregnated wood was cured and densified through hot pressing at 80℃under 5 MPa.The modified wood showed increases in tensile strength,bending strength and hardness of 259%,122%and 75%,respectively,compared to natural wood,with a weight gain of 18.9%and a compression rate of 75%.Regarding flame retardancy,the vertical burning rating reached V-0,the limiting oxygen index(LOI)was 50.1%,the peak heat release rate(HRR)decreased by 60.1%,total heat release(THR)and total smoke release(TSR)decreased by 44.7%and 95.1%,respectively,and carbon monoxide release(COP)decreased by 31.2%.In terms of anti-corrosion performance,this material can effectively resist Aspergillus niger,with the mold-infected area of 0,achieving 100%mold control efficiency(MCE).This study provided a novel approach for improving the quality of fast-growing wood,and the resulting modified wood shows significant potential for applications in fire safety engineering and structural construction.关键词
壳聚糖/硅酸钠/协同改性/力学性能/阻燃性能/防霉性能Key words
chitosan/sodium silicate/synergistic modification/mechanical properties/flame retardant performance/mold resistant performance分类
农业科技引用本文复制引用
梁博楠,张坤,刘苏玲,刘小桢,李雪琪,樊雪勤,张杨,甘文涛..漂白-浸渍-热压协同改性泡桐木材的制备及性能表征[J].木材科学与技术,2025,39(6):43-52,61,11.基金项目
"十四五"国家重点研发计划"木质前沿新材料制造关键技术"(2023YFD2201400). （2023YFD2201400）
