Marine biofouling caused a number of questions about energy consumption and safety. While there were still some challenges in developing an environmentally friendly, non-toxic and long-term antifouling slippery liquid-infused porous surface (SLIPS). Here, we proposed a difunctional antifouling strategy via constructing porous polydimethylsiloxane (PDMS) surface with a layer of aerogel by sol-gel method and grafted cinnamaldehyde chemically. The improvement in structure enhanced the liquid storage stability of coating, which in turn increases its anti-bioadhesive ability. In addition, the grafted cinnamaldehyde could also be used to act as a chemical antibacterial and is intelligently released in the face of harsh fouling environments, which played a key role in prolonging the antibacterial lifespan of the coating. After the 120-hour anti-bacteria experiment and the 25-day anti-algae experiment, the anti- Escherichia coli (anti- E. coli ) rate and the anti-algae rate of the coating reached 99.6% and 99.9%, respectively, which was attributed to the excellent long-term antifouling properties of the coating. The combination of physical and chemical antifouling property made the coating achieve long-term fouling prevention for marine engineering equipment.
Guohao Li,Lingli Shang,Dapeng Li,Yiwan Huang,Shijun Long,Xuefeng Li
The antifouling capabilities of zwitterionic hydrogels have been well established, yet, drawbacks such as single antifouling performance and osmotic pressure-driven swelling in water, which lead to poor mechanical properties and low bonding strength, respectively, remain obstacles to practical applications. In this work, silane-modified polyampholyte (S-PA)-based hydrogel coatings with high adhesive strength and multi-scale antifouling ability were prepared by introducing silane onto the hydrogel surfaces. The resulting S-PA hydrogel coatings exhibited as high as 1980 J m -2 adhesion, due to the covalent bonding between the vinyl groups in PA and silanols in silane molecules. Furthermore, the S-PA hydrogel coatings demonstrated good protein adsorption resistance (the protein adsorption capacity of bovine serum protein was 5 mg g -1 ) and bacteriostatic ability, which endows the coating's multi-scale antifouling effect together with its excellent anti-diatom adhesion property (the adhesion area of navicular on S-PA hydrogel was as low as 7.43 mm 2 ). The high adhesive strength and multi-scale antifouling ability of the S-PA hydrogel coatings presented in this work may provide a new route toward marine antifouling strategies.
危险品化学品经营许可证（带存储）