以纤维素纳米晶（ CNC）作为添加物，对紫外光固化水性聚氨酯丙烯酸酯（ UV-WPUA）进行共混改性。通过实时红外、转矩流变仪、紫外 -可见光分光光度计、扫描电子显微镜（ SEM）、电子万能试验机等表征手段探究了 CNC的添加量对复合树脂及其光固化涂层的性能影响。结果表明：当 CNC的添加量为 2%时， CNC颗粒在复合树脂中分散性良好，复合涂层的可见光透过率大于 85%，铅笔硬度 3H，附着力 0级，拉伸强度 9. 8 MPa，复合涂层的综合性能最好。
The title cellulose nanocrystals（CNC）was used as additive to modify the UV-curable waterborne polyurethane acrylate（UV-WPUA）resin by blending. The properties of theblended resin and the cured coatings were characterized by real-time fourier transform infraredspectroscopy（real-time FT-IR）， torque rheometer，UV-Vis spectrophotometer，scanning electron microscope（SEM）and electronic universal testing machine. The results showed thatwhen the incorporation level of CNC was 2 wt%，it was dispersed well in the blended resin andthe comprehensive properties of the coatings was the optimal：transmittance in visible range was higherthan 85%，pencil hardness 3H，adhesion 0 grade，tensile strength 9.8 MPa.
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