【目的】丙烯酸酯类树脂虽为当前海洋防污涂料的主流基料，但其降解性能差，存在潜在海洋环境累积风险，需提高丙烯酸酯类海洋防污涂料的降解性能。【方法】将纳米纤维素与接枝 1，2-苯并异噻唑 .3-酮（BIT）的丙烯酸酯树脂进行物理共混，成功制备出一系列具有优异降解性能的海洋防污涂料。利用红外光谱对树脂结构进行表征，并测试该涂层在海水环境与土壤环境中 6个月的降解率，通过水接触角评估该涂层亲水性，采用抑藻测试与浅海挂板测试验证该涂料的防污性能。【结果】该系列涂料在海水和土壤环境中均表现出良好的降解性能。在海水浸泡后涂层的水接触角呈现明显下降趋势，且纳米纤维素含量越高的涂层下降幅度越大。该涂层对 2种典型海洋藻类小球藻和金褐藻的生长均具有显著的抑制作用，其中对金褐藻的抑制效果较为突出；浅海挂板实验表明所制备的涂料具有较好的防污性能。【结论】纳米纤维素共混改性的丙烯酸树脂，不仅展现出了良好的生物降解特性，而且保持了其防污能力，在海洋防污涂料领域具有潜在的应用前景。

［Objective］ Acrylic resins are the primary binders in current marine antifouling coatings，but their poor degradability poses a potential risk of accumulation in the marine environment.It is necessary to improve the degradation performance of acrylic-based marine antifouling coatings.［Methods］ A series of marine antifouling coatings with excellent degradability were successfullyprepared by physically blending nanocellulose with acrylic resin grafted with 1，2-benzisothiazolin-3-one（BIT）. The resin structure was systematically characterized using infrared spectroscopy. The degradation rates of the coating were measured over 6 months in seawater and soil environments. Thehydrophilicity of the coating was evaluated via water contact angle measurement，and the antifoulingperformance was verified through algal inhibition tests and shallow-sea panel tests.［Results］ The coatings demonstrated excellent degradation performance in both seawater and soil environments. Afterseawater immersion，the water contact angle of these coatings decreased significantly，with a more pronounced reduction observed for coatings containing higher nanocellulose content. The coatings significantly inhibited the growth of two typical marine algae，Chlorella and golden-brown algae，with particularly pronounced inhibition against golden-brown algae. Shallow-sea panel experiments demonstrated that the prepared coatings possess good antifouling performance.［Conclusion］Acrylicresins modified by blending with nanocellulose not only exhibited excellent biodegradability but alsoretained their antifouling properties，demonstrating potential application prospects in the field of marine antifouling coatings.