中文摘要：

长链高聚物已大量应用于管道减阻中并取得了显著效果,但将其制成涂层应用于航行器减阻则存在着有效减阻时间短等问题。利用接枝共聚反应将聚丙烯酰胺长链分子固连在水性环氧树脂基材上,制备了长效性长链接枝减阻薄膜。通过实验,对其耐水性能、减阻率、有效时间等材料特性进行了研究,验证了长链薄膜在长时间水流的冲刷下仍能保持表面光滑完整,并保持大量聚丙烯酰胺分子固连在薄膜表面发挥减阻作用;长链薄膜在3.6～10m/s的水速下具有明显减阻效果,平均减阻率为9.1%;有效减阻时间在3h以上,具备一定长效减阻能力。

英文摘要：

The long-chain polymers have been applied to drag reduction of pipeline and obtained remarkable effect,but the effective acting time of its coating is very short for being applied to drag reduction of watercraft.In order to solve the problem of long-chain polymers,the polyacrylamide long-chain molecules were fixed to water-borne epoxy substrate by graft copolymerization for synthesizing long-acting long-chain grafting drag-reducing film.To verify the practicability of the long-chain film for drag reduction of watercraft,the properties of long-chain film such as water resistance,drag reduction effect and effective acting time were researched.The results show that the long-chain film can keep the surface smooth and undamaged after being washed for a long time,and keep a large number of polyacrylamide molecules fixing to the film surface.The long-chain film has significant drag reduction effect in the flow velocity range between 3.6~10m/s,and the average drag reduction efficiency reaches 9.1%,while the effective drag reduction time exceeds 3h,so that the long-chain film has the ability of prolonged drag reduction.