Optimization of parameters for vacuum heat modification of Cupressus funebris wood

A full factorial experiment was conducted to analyze the main and interaction effects on physical mechanical properties of Cupressus funebris Endl. wood subjected vacuum heat modification. The response variables evaluated were mass loss rate (ML, %), moisture resistance (MR, modulus rupture in bending (MOR, MPa). results reveal significant variations modification time, holding temperature, pressure as independent factors, along with varying degrees among them. Simplifying analysis model, a regression equation derived describe relationship between variable (mass rate) factors: model achieved an R-squared value 96.0% (predicted) 73.7%, indicating good overall predictive performance. Optimal process parameters for mid-temperature cypress determined based (MOR), resulting temperature 120 °C, time 5 h, intensity 0.1. reliability further confirmed through orthogonal testing.