antifouling coating防污材料 海洋PPT教学课件

1、请看船底hull beneath waterVessels fouled by marine organisms. Images show (a) (b) fouling by the green alga (seaweed) Ulva (image courtesy of Dr J. Lewis) and (c) (d) (e) barnacles (image courtesy of Dr C.D. Anderson).abdce第1页/共9页海洋生物的生长机理L.D. Chambers, F.C. Walsh, R.J.K. Wood, K.R. Stokes, World Mariti

2、me Technology Conference, ICMES Proceedings, The Institute of Marine Engineering, Science and Technology, March 2006.Diversity and size scales of a range of representative fouling organisms. (a) Bacteria (scanning electron micrograph (SEM), (b) false-colour SEM of motile, quadriflagellate spores of

3、the green alga (seaweed) Ulva, (c) false-colour environmental SEM image of settled spore of Ulva showingsecreted annulus of swollen adhesive, (d) SEM of diatom (Navicula), (e) larva of tube worm, Hydroides elegans (image courtesy of B. Nedved), (f) barnacle cypris larva (Amphibalanus amphitrite) exp

4、loring a surface by its paired antennules (image courtesy of N. Aldred), (g) adult barnacles (image courtesy of AS Clare), (h) adult tubeworms (H. elegans; image courtesy of M. Hadfield), (i) adult mussels showing byssus threads attached to a surface (image courtesy of J. Wilker), (j) individual pla

5、nts of the green alga (seaweed) Ulva. The diagram is intended to indicate relative scales rather than absolute sizes; individual species within a group can vary significantly in absolute size.James A. Callow & Maureen E. Callow, NATURE COMMUNICATIONS, Trends in the development of environmentally fri

6、endly fouling-resistant marine coatings, March 2011.第2页/共9页污损生物的危害机理Hydrodynamics are negatively affected(Roughness & Wall Shear Stress)-R.L. Townsin, Biofouling 19 (2003) 9 (Supplement).Turbulence profiles of marine vessels is affected-M.P. Schultz, G.W. Swain, Biofouling 15 (2000) 129.Sound signat

7、ure is affected -E. C. Haderlie, in: J. D. Costlow, R. C. Tipper (Eds.), Marine Biodeterioration: An Interdisciplinary Study, Naval Institute Press, MD, USA, London E. and F.N. SPON, 1984.传统的防污方法L.D. Chambers, F.C. Walsh, R.J.K. Wood, K.R. Stokes, World Maritime Technology Conference, ICMES Proceedi

8、ngs, The Institute of Marine Engineering, Science and Technology, March 2006.1. 重金属&杀虫剂2. 三丁基锡3. 低表面能涂料4. 环境友好型涂料Schematic of (a) soluble matrix biocide releasing coating and (b) insoluble biocide releasing coating. Antifoulant loaded, depleted antifoulant.第3页/共9页Antifouling systemLeaching rateLifet

9、imeErosion rateCost/US $ m-2Problems(TBT) self-polishingcopolymer paintsChemical reaction through hydrolysis. Reaction zone of ablation 5 m deep.45 years1b3 m month1 40.Polishing leads to smoothing, reducing fuel consumption.$680,8842Banned 20086(Tin-free) self-polishingcopolymersChemical reaction t

10、hrough hydrolysis of copper, zinc, and silyl acrylate.5 yearsPolishing leads to smoothing,Reducing fuel consumption.$1,382,6702Life time shorter thenTBT-based paint systems. Increasing the overall cost of ship maintenance.(Tin-free)conventional paint10 g cm2 d141218 monthsN/AN/AHard non-polishing pe

11、rformanceleads to coating build up. Performance only suitable forlow fouling environments2Control depletionpolymers (CDPs) copper paintPhysical dissolution,works by having asoluble matrix.3 yearsMatrix erodes dueto dissolution ofcoating binder.$1,357,7862Biocide release not constant,poor self-smooth

12、ing, littleactivity during idle times,higher costs due to necessityof sealer coat on recoats3Foul releaseLow energy surface,some use leachedsilicone oils525 yearsN/AN/AIn-water cleaning difficult asbrushes may damage silicone,foul release coatings are proneto abrasion damage7Performance comparison f

13、or the key antifouling systems used1. A. Terlizzi, S. Fraschetti, P. Gianguzza, M. Faimali, F. Boero, Aquat. Conserv. Mar. Freshw. Ecosyst. 11 (2001) 311.2. J. Lewis, Hull fouling as a vector for the translocation of marine organisms: Report 1 and 2, Dept. of Agriculture, Fisheries and Forestry-Aust

14、ralia,Marine Science and Ecology Pty. Ltd. Commonwealth of Australia, 2002.3. D.M. Yebra, S. Kiil, K. Dam-Johansen, Prog. Org. Coat. 50 (2004) 75.4. G. Swain, Oceans 86 Conference Record, IEEE/MTS,Washington, D.C., 1986, p. 221.5. R.F. Brady Jr., I.L. Singer, Biofouling 15 (2000) 73.6. IMO, Internat

15、ional Convention on the Control of Harmful Anti-fouling Systems on Ships AFS/CONF/26, vol. 18, October 2001.7. J.A. Lewis, Proceedings: National Shipping Industry Conference, Sydney, NSW, Australian Maritime Safety Authority, Canberra, March 2001.第4页/共9页仿生学Biomimetic approachBioinspired topographies

16、 to deter fouling. The scanning electron micrographs show the skin denticles of spinner shark in face (a) and end (b) views and (c) image of Sharklet AF topography moulded in PDMSe. Scale bars are (a) 500 m, (b) 250 m and (c) 20 m. Images courtesy of: Professor A.B. Brennan.Settlement of spores of U

17、lva on microengineered Sharklet AF patterns moulded in PDMSe. The graph shows the results of an experiment in which spores of Ulva were allowed to settle (adhere) to a variety of Sharklet-type patterns, with increasing numbers of distinct topographic features. The height of the bars indicates the re

18、sulting density of spores settled on the different patterns, which are illustrated below each bar (from left to right, n = 0 (smooth), 15, where n = the number of distinct topographic features). In all cases, the height and spacing of the features remained constant (2.8 m high2 m wide2 m space). ima

19、ges of patterns courtesy of Professor A.B. Brennan.Long, C. J. et al. A model that predicts the attachment behavior of Ulva linza zoospores on surface topography. Biofouling 26, 411419 (2010).第5页/共9页亲疏两性微结构涂料 Amphiphilic nanostructured coatingsThe concept of a chemically heterogeneous or mosaic-like surface that repels proteins. Such chemically ambiguous coatings could be based, for example, on the combination of fluorinated, hydrophobic segments (green) and hydrophilic poly(ethyleneglycol) segments (blue), thus imparting an amphiphilic character. The re