不同厚度中密度纤维板的孔隙分形特征研究

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中图分类号：TS658；TQ320.63 文献标识码：A DOI：10.7525/j.issn.1006-8023.2025.04.008

Abstract：This studyinvestigatedtheporefractalcharacteristicsofmediumdensity fiberboard（MDF）of diferentthicknesses.By combining high-pressure mercury intrusion porosimetry （MIP） and nitrogen （ N2 ）adsorption experiments， the pore structure parameters such as pore volume，pore size，and pore size distribution were quantified.Utilizing the FHH（Frenkel-Halsey-Hill）andMIPfractal theoretical models inconjunction with experimental results，the fractal dimensions of pores at diferent scales werecalculated.Thecomplexityof the pore structure was quantified through fractal models，revealingsignificantdiferences inthepore fractalcharacteristicsofMDFofdiffrentthicknesses.Thefractal dimensions calculated using thefractal models indicated that both the macro-pore fractal dimension（2.957-2.988）and the mesopore fractal dimension （2.602-2.851） increased significantly with increasing thickness （ R2>0.90 ）， suggesting that the pore structurecomplexityof thickerboardswas higher.The influenceof density（O.722-O.777 g/cm³）on the fractal dimension was relativelyweak．Moreover，there wasa closerelationship betweenthefractal dimensionand pore structure parameters.The macro-pore fractal dimension was positivelycorelated with the average pore size and porosity of the material，whilethe mesopore fractaldimension was negativelycorelated with theaverage pore sizeand positively corelated with the specific surface area.This study reveals the pore fractal paterns dominated bythickness，providing a theoretical basis for optimizing the environmental performance of MDF through process improvement.

Keywords：MDF；pore; fractal dimension; high-pressure mercury intrusion；nitrogen adsorption

0 引言

随着我国经济的持续上升，建筑行业得到快速发展的同时，家具建材和室内装饰材料的需求也逐年攀升，木制人造板被广泛应用于其中。（剩余12535字）