PAP-ZnCl2 Impregnation Enhances the UV Resistance and Mechanical Properties of Wood
To enhance the UV resistance and mechanical properties of wood,the wood was modified with a composite impregnating agent of poly-aminopolyether phosphite(PAP)and zinc chloride(ZnCl2).The impacts of PAP-ZnCl2 on wood properties were assessed through impregna-tion.The findings indicated that the impregnation treatment with PAP-ZnCl2 significantly enhanced the UV resistance and mechanical proper-ties of wood.Particularly,the treated wood exhibited outstanding UV blocking effects and higher tensile and bending properties compared to the untreated control samples.The tensile property of the modified wood increased from 20.5MPa to 41.3MPa,and the bending property rose from 80.3 to 94.25MPa.Moreover,the UV shielding effect of the modified wood was remarkable within the wavelength range of 200 to 600nm.In-frared spectroscopy(FTIR),scanning electron microscopy(SEM),and mechanical properties tests demonstrated that the combined action of PAP and ZnCl2 effectively strengthened the surface structural stability of wood and mitigated the material degradation caused by ultraviolet irra-diation.The research outcomes have reference value for enhancing the durability of wood in outdoor environments and practical applications in related fields.
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