研究紫外光引发甲基丙烯酸十二氟庚酯(DFHMA)在LDPE薄膜表面的接枝改性。考察辐照时间和距离,光敏剂浓度、紫外光强度对接枝率的影响。通过红外光谱分析、扫描电镜及能谱分析对接枝前后的薄膜表面进行表征,结果表明:DFHMA可以通过紫外引发接枝到LDPE等薄膜表面;并对接枝后薄膜的润湿性进行分析,结果表明:接枝含氟单体后薄膜表面能降低、润湿性减弱、接触角变大。 UV-induced grafting of dodecafluoroheptyl methacrylate (DFHMA) on the surface of LDPE films was studied. The effects of irradiation time and distance, photosensitizer concentration and UV intensity on grafting rate were investigated. The surface of the film before and after grafting was characterized by FTIR, SEM and EDS. The results showed that DFHMA could be grafted onto the surface of LDPE film by UV-induced grafting. The wettability of the film after grafting was analyzed, The results show that the surface energy of the film decreases, the wettability decreases and the contact angle increases.