| Any marine structures such as ship hulls, jetties and platforms are subject to diverse and severe biofouling, which restricts their applications and results in tremendous expense. Traditional toxic antifouling coating can prevent marine organisms fouling effectively, but it also causes serious pollution to the marine environment. As more attention is payed to protecting the marine environment, novel nontoxic, safe and efficient, broad-spectrum green antifouling technology will become the development direction in the futureTraditional antifouling paint testing process must go through three stages, it includes the harbor floating raft hang antifouling coating experiment, a small area of painted ship tests and real ships assessment. Each stage requires more than one year, which is not only time-consuming and very costly, therefore, we need quick, simple laboratory evaluation method. In order to shorten research time of antifouling paints, this paper designed a laboratory device which assesses the adhesion of fouling organisms, meanwhile, according to the china national standard GB/T7789-2007, we designed the ship antifouling coating performance testing device.We selected five kinds shells which antifouling performance is different, and we used the surface profile measuring instrument measuring the shell surface morphology parameters, obtained the parameters of the shell surface morphology and processed its data. With the method of sandpaper and grinding, precision machining, biological replication prepared the experimental model of shellfish bionic surface microstructure. According to the process of adhesion of fouling organisms and nontoxic, no release bionic shell surface characteristics, we selected Nitzschia closterium as the target organisms, observed and recorded attachment of Nitzschia closterium on the surface of experimental model every day. Analysed the factors of antifouling performance, explored the relationship between the anti-fouling coating surface morphology parameters and anti-fouling performance. Experimental results showed that attachment of Nitzschia closterium was more on the bionic shell surface which includes obvious ridge and groove than no obvious ridge and groove.To test the antifouling performances of the resulted coatings, this paper presented a simple, rapid laboratory evaluation method of antifouling performance in bionic shell surface. Chose angle as a key index to judge its antifouling performance, by comparison chlorophyll a value and contact angle, discussed the feasibility of contact angle as a preliminary measure parameter of antifouling effect, the experimental results showed that the change trend of chlorophyll a value and contact angle was opposite, our technique was proved to be a qualified method for evaluating the antifouling properties. Also, its accuracy and reliability are further examined. |
