Preparation Of Carbon Nanotubes Modified Silyl Acrylate Polymer And The Study Of Its Antifouling Properties

Marine biofouling brought a variety of effects to ship hulls and marine equipments. The economic loss caused by the growth of running resistance and fuel consumption is the most direct effect. Scientists have been committed to the research and development of new non-toxic antifouling coatings. Carbon nanotubes were concerned due to their potential antimicrobial property and environmental friendliness, but research about nanotubes in the field of marine antifouling is less. In this study we designed and synthesized several silyl acrylic polymer, and studied the effect of modified carbon nanotubes on their mechanical properties and antifouling performance. Later, we prepared alginate/carbon nanotube hydrogel microspheres using carboxyl MWCNTs, and studied their Cu2O release properties. This paper includes following aspects of work.We synthesized six different kinds of silyl acrylic polymer by radical polymerization under the same Synthesis temperature, synthesis conditions, solvent type and composition,where the type and proportion of monomers were different. The results of FTIR, GPC, and viscosity stability tests show that the molecular weight of the polymers have no obvious difference when the total amount of the monomers were the same; polymer viscosity increases with molecular weight, and can be stored stable at room temperature in the dark for more than 4 months; polymer itself has an anti-fouling property.Four coupling agents 3-aminopropyltriethoxysilane(trade name: KH550),3-glycidoxypropyltrimethoxysilane(trade name: KH560), y-(methacryloxypropyl)trimethoxysilane(trade name: KH570) and (heptadecafluoro-1,1,2,2-tetradecyl)trimethoxysilane(trade name: TSL-8233)were used to modify the MWCNTs by silanization reaction. The test results of the dispersion of carbon nanotubes show that coupling agents may improve the dispersibility of the carbon nanotubes. The test results of the mechanical properties and diatoms adhesion inhibition properties of the composite coatings show that carbon nanotubes added in the coatings can alter the mechanical properties of the composite coatings and make the coatings able to inhibit the adhesion of diatoms. KH550-modified carbon nanotubes added in the coating can improve the mechanical property of the composite coating, its ability to inhibit the adhesion of diatoms is the best.We prepared sodium alginate/carbon nanotubes gel microspheres with different concentrations of sodium alginate and amount of carbon nanotubes by ionic cross-linking reaction. The sodium alginate/carbon nanotubes gel microspheres were used as a carrier for Cu2O and the sustained-release properties were the research focus. Adding carbon nanotubes can enhance the mechanical strength and drug encapsulation efficiency of the gel microspheres, at the same time reducing the swelling rate, slowing the sustained-release rate.With the increased concentration of sodium alginate and amount of carbon nanotubes, the microspheres had higher drug encapsulation efficiency and mechanical strength, less swelling rate and sustained -release rate.