目的 由紫外光固化/空气后固化构成双重固化体系，以弥补单一紫外光固化存在固化速度慢及边角棱固化不充分的缺陷。方法 将具有气干固化性质的蓖麻油引入两端带有C==C双键的水性聚氨酯中，使水性聚氨酯体系不仅能进行紫外固化，还可进行空气后固化。通过控制光引发剂、催干剂的添加量，制得了紫外光固化、紫外光/空气双重固化、空气/紫外光双重固化的水性聚氨酯木器涂料，研究了不同水性聚氨酯乳液配方、固化方式对涂膜、漆膜性能的影响。结果 制备的水性聚氨酯分散体具有良好的储存稳定性且90天内无沉淀、分层现象。DMPA质量分数为6.5%，CO质量分数为15.24%时，乳液较稳定，且涂膜耐水性和力学性能好。紫外光/空气双重固化涂膜拉伸强度为13.06 MPa，断裂伸长率为22.53%，弹性模量为11.39 MPa，紫外光/空气和空气/紫外光双重固化体系木器漆膜硬度均达到4H，附着力均为0级。结论 与空气/紫外光固化、单一紫外光固化两种固化方式相比，紫外光/空气双重固化涂膜力学性能最优异，热稳定性介于两者之间。紫外光/空气和空气/紫外光双重固化体系木器漆膜硬度、附着力优于传统单一紫外光固化的漆膜。

The work aims to develop an UV/air dual curing system by ultraviolet curing and air post curing so as to make up the low curing speed of the single UV curing system and the deficiency of incomplete curing in the corner and edge. Castor oil with air-drying curing property was introduced into waterborne polyurethane with carbon-carbon double bond at both ends. Thus, the waterborne polyurethane system could be UV-cured and air-cured. Waterborne polyurethane wood coatings with UV curing, UV/air dual curing and air/UV dual curing were synthesized by controlling the amount of photoinitiator and drier. The effects of different waterborne polyurethane emulsion formulations and different curing processes on the properties of film were characterized. The PUD had good storage stability with no precipitation and delamination within 90 days. The emulsion was stable and the water resistance and mechanical properties of the coating were good with 6.5% DMPA and 15.24% CO. The tensile strength, elongation at break and modulus of elasticity of the film by UV/air dual curing were 13.06 MPa, 22.53% and 11.39 MPa, respectively. Both the films by UV/air and air/UV dual curing systems had hardness of 4H and adhesion of 0 grade. The mechanical properties of the film by UV/air dual curing are the best compared with that of film by air/UV curing film and single UV curing, and the thermal stability is between that of film by air/UV curing and single UV curing. The hardness and adhesion of wood coating film cured by UV/air and air/UV dual curing are better than that of film by traditional single UV curing method.