Preparation And Study Of Polyacrylamide-based Antifouling Materials

Biological fouling can bring about some unwanted and detrimental consequences to the marine ship and facilities. Antifouling coatings are the most reliable way to prevent the settlements of biofoulings. In the traditional antifouling paints, the primary agents such as organotin and cuprous oxide not only cause the environmental risks, but also have a harmful effect on the human health. Therefore, modern approaches to environmentally effective antifouling systerms and their performance are highlighted.As a new method, bionical anti-fouling paints have no-toxic and non-polluting, they are more regared by more and more people. It is well known that, shark live in the sea and its skin have no marine biological fouling.The research shows that, the shark skin have a special unstable structure, and its skin can secrete mucus to form a mucus layer.In the effect of the current, the mucus layer is unstable and the marine biological hardly adhere on the shark's skin. In this paper, the study focus on the initial stage to similate the behavior of shark skin's secrete mucus in order to prevent the settlements of the marine biofoulings. In the dedail is that adding the polyacrylamide-based materials into the silicone resin, and marking the coating. In the sea, the polyacrylamide will migrate to the coating's surface for the polyacrylamide's hydrophilic nature. In the effect of the seawater, the low gel layer will become unstable, so this coating can prevent the settlements of marine fouling effectively.In this paper, the selected polyacrylamide which is disposed by physical method and the polyacrylamide copolymer that synthesized by chemical methods mix with the silicone resin respectively.For the physical method, choosing the proper molecular weight scope polyacrylamide that can form mucus at first, and then mix the polyacrylamide and silicone resin each other by grinding method and adding phase solvent.The result shows that, the selected AP-120 and silicone resin are immiscible, and adding the silicone-polyether copolymer can realize AP-120 and silicone resin dissolved each other.The coating become while and break off when study the diatoms settlement on the coatings.So the physical method can not meet the need of the experiment.The paper also study the Poly(acrylamide-silicone) and Poly(acrylamide-silicone) microspheres that synthesized by chemical methods. Fourier transform infrared spectrum, Thermogravimetric Analysis, melt rate, static contact angle and ESEM as the study methods to charactere and analyse the copolymers. The copolymers as the anti-fouling agent mixed with silicone resin to prepare the coatings.The coatings's antifouling character is investigated by diatom and mussel cultivation. The result shows that, the COP gelatin can keep a longer time than the PAS gelatin in the sea, with the surface energy of silicone remaining unchanged, the restrain function for diatom and mussel adhesion is significantly improved by the addition of COP and PAS. The results of Environmental Scanning Electron Microscopic (ESEM) show that the COP and PAS on the silicone surface have changed into micro-gel after the paint immersed in the sea water, and the micro-gel structure can restrain diatom adhesion obviously.In this paper, mainly through putting the polyacrylamide-based materials into the silicone resin to achieve the imitation of the shark skin's mucus secretion, it is necessary to be further in-depth and improved to apply this antifouling agent into the marine antifouling field.