The aim of this study is to investigate the effects of different cellulose nanofibers (CNF, 0–20% w/w) and aluminum oxide nanoparticles (Al₂O₃ NPs, 0–4% w/w) concentrations on the properties of deacetylated konjac glucomannan (DKGM) base film, as well as the protective performance of DKGM-based composite film on wood. The addition of CNF primarily improves the mechanical properties of the film. Compared to the KGM base film, the DKGM/CNF composite base film (DKC) exhibits excellent tensile strength and elongation at break, with increases of 44.39 MPa and 19.87%, respectively. After application to the wood surface, the glossiness of the wood increased by 43.48%, and the moisture absorption dimensional change rates reached 0.07% (radial) and 0.11% (tangential), while the moisture absorption coefficients decreased to 0.008 (radial) and 0.019 (tangential). The addition of Al₂O₃ NPs primarily improves the film’s resistance to ultraviolet light and water. Compared to the DKGM base film, the water contact angle, water solubility, and water vapor barrier performance of the DKGM/ Al₂O₃ composite base film (DKA) significantly improved. When applied to the wood surface, the wood wear resistance and aging resistance increased by 62% and 69.67%, respectively. Therefore, DKGM base films doped with CNF and Al₂O₃ NPs have broad development prospects in the field of wood protection.

本研究的目的是研究不同纤维素纳米纤维 (CNF, 0–20% w/w) 和氧化铝纳米颗粒 (Al ₂ O ₃ NPs, 0–4% w/w) 浓度对脱乙酰基纳米纤维性能的影响魔芋葡甘聚糖（DKGM）基膜，以及DKGM基复合膜对木材的防护性能。 CNF的添加主要改善了薄膜的机械性能。与KGM基膜相比，DKGM/CNF复合基膜（DKC）表现出优异的拉伸强度和断裂伸长率，分别提高了44.39 MPa和19.87%。应用于木材表面后，木材光泽度提高43.48%，吸湿尺寸变化率达到0.07%（径向）和0.11%（切向），而吸湿系数下降至0.008（径向）和0.019 （切向）。 Al ₂ O ₃ NPs的添加主要提高了薄膜的耐紫外线和耐水性。与DKGM基膜相比，DKGM/Al ₂ O ₃复合基膜(DKA)的水接触角、水溶性和水蒸气阻隔性能显着提高。应用于木材表面时，木材耐磨性和耐老化性分别提高62%和69.67%。因此，掺杂CNF和Al ₂ O ₃ NPs的DKGM基膜在木材保护领域具有广阔的发展前景。