Research On The Preparation And Wetting Behavior Of Super-slippery Shape Memory Epoxy Resin Surface

Super-slippery surfaces are used as a new intelligent surface with huge application prospects in smart control droplets.Currently,stimuli-responsive materials to construct smart super-slippery surfaces are often used to regulated the wetting and the sliding states of the droplet.However,the above-mentioned methods not only require the introduction of complex external energy,but also need a continuous stimulation of the surface,and the microstructure of the super-slippery surfaces are also impaired in actual use,which makes the actual application of the super-slippery surface are limited.Therefore,this paper introduces a shape memory polymer with shape memory properties and self-healing properties.The self-healing properties and shape memory properties are used to overcome the existing problems of super-slippery surfaces,and some new super-slippery smart surfaces are designed.The sliding performance of the super-slippery surface was investigated in detail.This topic was prepared a shape memory epoxy resin porous structure having a depth of 10?m and different distance between pores as a substrate for super-slippery surface,hydrophobized and infused silicone oil,formed a desired super-slippery surface.Experiments have shown that the shape fixation rate and the shape recovery rate of the sample are above 95%,indicating that the sample has a good shape memory performance.The shape memory performance can be used to reversibly control the porous structure of the surface,so that the sliding angle of t he water droplet on the surface can be reversibly changed between 18°and 90°,and the responsive control of the sliding performance of the water droplet on the super-slippery surface is realized.This characteristic is universal,not only suitable for water droplets,but also for some common organic droplets,and the process can be cycled multiple times,which proves that the sample has good cycle performance.In order to solve the problem that the polymer may break and the surface microstructure collapse under external force,this paper introduces the thermoplastic material polycaprolactone as a repair agent on the basis of the above method to prepare a shape memory epoxy resin porous surface with self-healing properties as the substrate,after being hydrophobized,infused with silicone oil to obtain a super-slippery surface with self-healing function.Experiments show that the surface has not only excellent shape memory effect,but also retains the thermoplasticity of polycaprolactone,which can repair the cracks of the sample at a certain temperature,and the maximum repair efficiency can reach 70%after calculation.At the same time,due to the material's shape memory performance,the surface microstructure can also repair itself after it collapses under the action of external force.The study on the surface sliding performance found that when the sample is damaged under both the macroscopic and microscopic conditions,the sliding angle of the water droplet will increase to 90°.When the sample is heated to above T_g,the super-slippery performance of the sample can be restored,and the water droplet will slide on the surface again,indicating that the sliding performance of the prepared surface also has good self-healing characteristics.