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This kind of paint magnifies the trick

Painty.com 2022-10-18

On March 18th, the latest collaborative research results of Marine sensor development team of Opto-electronic Engineering Technology Center of Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences and Marine Pollution and Prevention research team of School of Ocean and Earth, Xiamen University were published in International Bio& Biodegradation.

 

 

The cooperative team studied the antifouling efficacy of natural product-based antifouling coatings on six kinds of commonly used Marine sensor metal and non-metal materials through long-term sea experiments in the subtropical sea areas of Xiamen and Shenzhen. Hao Huanhuan, a doctoral student from the School of Ocean and Earth Sciences, Xiamen University, and Liu Peng, a doctoral student from Shenzhen Advanced Institute, are co-first authors of the paper. Feng Danqing, a professor from Xiamen University, and Li Jianping, a senior engineer from Shenzhen Advanced Institute, are co-corresponding authors of the paper.

 

 

For all kinds of instruments deployed in seawater for a long time, biological attachment is a serious problem, which will shorten the service life of instruments, increase the frequency and cost of manual maintenance, and lead to the drift of observation signals and data errors. Therefore, must carry on the antifouling treatment to the outside of the instrument.

 
 
Coating antifouling coatings on the surface of in-situ instrument shell materials is one of the main methods to reduce biological attachment. However, existing antifouling coatings such as heavy metal based coatings have strong toxicity, which will not only pollute the seawater environment, but also may be harmful to the biological objects monitored by instruments. Some other low surface energy coatings have poor static antifouling effect and are not suitable for static deployment of sensors in sea water.
 
 
 
In order to solve this problem, the team of Shenzhen Advanced Institute and Xiamen University carried out close cooperation to study the antifouling efficacy of natural products (camptothecin, CPT) based antifouling coatings on different materials of instrument shells in the real seawater environment in the subtropical sea area.
 
 
 
In this research, the team of Shenzhen Advanced Institute first made six commonly used shell materials of Marine instruments (316L stainless steel, TC4 titanium alloy, 7075 aluminum alloy, polyformaldehyde, polyvinyl chloride, Teflon) into hanging plates, and together with the team of Xiamen University, placed the hanging plates underwater in Wuyuan Bay, Xiamen. To test the antifouling efficiency of CPT-based antifouling coatings developed by Xiamen University team on the surface of the above materials.
 
 
 
The sea test results showed that the CPT-based antifouling coatings showed excellent anti-biological adhesion performance on the above six materials within 3 months in the sea area. The control area without coating was covered with fouling organisms, but the coated area kept the surface clean. After 9 months of measurement in the sea area, the fouling organisms in the coated area were still significantly less than that in the control area, especially in the plastic material, the anti-biological adhesion efficiency was better than that in the metal material.
 
 
 
In addition, the two sides also conducted sea trials of the anti-fouling effectiveness of CPT-based anti-fouling coatings on three in-situ sensors developed by the Shenzhen Advanced Institute team through the actual deployment of the buoy platform in Daya Bay, Shenzhen. Buoy sea test results show that CPT-based coatings can keep the surface of the in-situ sensor shell clean for at least 4 months when applied to the underwater in-situ sensor, which greatly extends the maintenance-free cycle of the sensor compared with the case without coating treatment (2 weeks on average).
 
 
 
In addition, the two sides also conducted sea trials of the anti-fouling effectiveness of CPT-based anti-fouling coatings on three in-situ sensors developed by the Shenzhen Advanced Institute team through the actual deployment of the buoy platform in Daya Bay, Shenzhen. Buoy sea test results show that CPT-based coatings can keep the surface of the in-situ sensor shell clean for at least 4 months when applied to the underwater in-situ sensor, which greatly extends the maintenance-free cycle of the sensor compared with the case without coating treatment (2 weeks on average).

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