Si Chunying, Hu Guoming, Jiang Wei, Sun Ping, Cao Jingjing, Ji Ruixiang, Li Ai-Min, Zhang Quanxing
State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
Biomacromolecules. 2022 Oct 10;23(10):4327-4338. doi: 10.1021/acs.biomac.2c00779. Epub 2022 Sep 7.
As the utilization of degradable polymer coatings increased, the accompanying trade-off between good degradability and high-efficiency antidiatom adhesion due to their hydrophobic nature remains unresolved. The study presents a new hydrophobic surface-fragmenting coating consisting of degradable hyperbranched polymers (hereafter denoted as h-LLA) synthesized by reversible complexation-mediated copolymerization with isobornyl acrylate (IBOA) and divinyl-functional oligomeric poly(l-lactide) (OLLA-V), both derived from biomass, that exhibited superior resistance (∼0 cell mm) to marine diatom () attachment with higher OLLA content. The combined impact of the microscale hollow semisphere micelles that self-assembled degradable hyperbranched copolymers and hydrolysis-driven self-renewable surfaces following immersion in seawater may account for the remarkable resistance of h-LLA coatings against . Detailed investigations were conducted across multiple perspectives, from hydrolytic degradation to broad-spectrum antibacterial attachment to ecotoxicity assessment. The excellent features of high resistance to marine diatoms and bacterial attachment, degradability, and environmental friendliness make the as-prepared h-LLA coatings widely sought after for antifouling coating applications.
随着可降解聚合物涂层应用的增加，由于其疏水性，在良好的降解性和高效的抗硅藻附着之间的权衡问题仍未得到解决。该研究提出了一种新型的疏水表面破碎涂层，它由可降解的超支化聚合物（以下简称h-LLA）组成，这种聚合物是通过与丙烯酸异冰片酯（IBOA）和二乙烯基官能化低聚聚（L-丙交酯）（OLLA-V）进行可逆络合介导的共聚反应合成的，二者均来源于生物质，当OLLA含量较高时，该涂层对海洋硅藻（）附着表现出优异的抗性（约0个细胞/毫米）。自组装的可降解超支化共聚物形成的微尺度空心半球形胶束以及浸入海水中后水解驱动的自更新表面的综合影响，可能是h-LLA涂层对具有显著抗性的原因。从水解降解到广谱抗菌附着再到生态毒性评估，我们从多个角度进行了详细研究。高抗海洋硅藻和细菌附着性、可降解性以及环境友好性等优异特性，使得所制备的h-LLA涂层在防污涂料应用中备受青睐。
