Traditional antifouling agents usually have a certain toxic effect on marine environments and non-target organisms. In this study, Dictyophora indusiata polysaccharide (DIP) was applied as a natural antifouling surface modifier to prepare the surface coating for marine antifouling. Three DIP coatings were prepared: D. indusiata spore polysaccharide (DISP), D. indusiata volva polysaccharide (DIVP), and D. indusiata embryonic body polysaccharide (DIEP). The antifouling, tribological, and anticorrosion behavior of the coatings were examined. Results revealed that the three kinds of DIP coatings had excellent antifouling properties, which could effectively prevent the adhesion of Chlorella and the attachment of water-based and oily stains on the surface. Additionally, the coatings showed great mechanical stability and could maintain an extremely low coefficient of friction (COF < 0.05) after continuous wear. The drag reduction rate of the coated surfaces reached 5%, showing a powerful lubrication performance. Furthermore, the DIP coatings presented an outstanding corrosion resistance, where the equivalent circuit impedances were 4–9 orders of magnitude higher than the control groups. This research showed a promising prospect of surface coating fabrication with DIP for marine devices to achieve the purpose of antifouling and drag reduction.

传统的防污剂通常对海洋环境和非目标生物具有一定的毒性作用。本研究采用竹荪多糖（DIP）作为天然防污表面改性剂，制备海洋防污表面涂层。制备了三种 DIP 涂层：D. indusiata孢子多糖 (DISP)、D. indusiata volva 多糖 (DIVP) 和D. indusiata胚胎体多糖（DIEP）。检查了涂层的防污、摩擦和防腐性能。结果表明，3种DIP涂层均具有优异的防污性能，可有效防止小球藻的粘附以及水性、油性污渍在表面的附着。此外，涂层表现出良好的机械稳定性，并且在连续磨损后仍能保持极低的摩擦系数（COF < 0.05）。涂层表面减阻率达到5%，表现出强大的润滑性能。此外，DIP涂层具有出色的耐腐蚀性，其等效电路阻抗比对照组高4-9个数量级。