Preparation Of Self-healable Organogel And Its Impact On Marine Biofouling

The presence of biofilm on the offshore engineering facilities is one of the main threats to its service life.It causes a mass of problems about economy and safety.Recently,a serious of work has proven that the slippery liquid infused porous surfaces(SLIPS)can efficiently inhibit adhesion of microorganisms.However,the traditional SLIPS is realized by infusing the lubricant into the porous micro-structure over a solid substrate.The slippery property will be lost when the lubricant layer or the solid substrate is destroyed.In order to overcome these limitations,we prepared three novel slippery organogel layers(OGs)which can be self-healing.The potential of OGs to inhibit biofouling was also examed.Specific research contents are as follows:(1)A self-healable organogel layer(OG)was designed by swelling the crosslinked polydimethylsiloxane(PDMS)with the n-alkanes.Compared with traditional slippery liquid-infused porous surfaces utilizing in the marine biofouling inhibition,the as-prepared OG has a self-healing property and can maintain high underwater transmittance.The potential of OG to inhibit biofilm formation was verified by a bacterial settlement experiment in a simulated marine environment.It demonstrated that the as-prepared OG can efficiently inhibit the bacterial attachment and maintain high underwater transmittance under the static and dynamic conditions.(2)A self-healable slippery OG was prepared by infusing the mixture of PDMS and silicone oil into the PCL electrospinning skeleton.Its self-healing property was verified by optical microscope images.Digital pictures were used to study the shape memory property of Polycaprolactone(PCL).In order to explore the impact of lubricant layer on the sliding velocity,the sliding velocity of water droplets on the OGs which were being self-healing was studied.The potential to inhibit the bacterial adhesion was verified by the bacterial adhesion analysis.Compared with the bare glass and PCL/PDMS substrate,the slippery OG can efficiently inhibit the bacterial adhesion.(3)A self-healable slippery OG was prepared by mixing the silicone oil with ,?-Aminopropyl terminated poly(dimethylsiloxane)(APT-PDMS)and isophorone diisocyanate(IPDI).The self-healing property of the OG was verified by digital pictures and measuring the stress when samples were fracturing.The bacterial settlement experiment was conducted to study the potential of as-prepared OG to inhibit the bacterial adhesion.It demonstrated that the slippery OG can remarkably inhibit the biofilm formation.