Study On The Effect Of Microstructure And Surface Properties Of Polymer Surfaces On Surface Wettability

Wettability is the basic property of the surface of the solid material.The surface wettability regulation of the material can be applied in many aspects such as biomedical,bionic,paint,lubrication,self-cleaning and so on.In the past few years,the design and application of special wettable surfaces have attracted more and more attention.Although many basic advances have been made in this type of basic research and various practical applications,most of these methods have many drawbacks,such as long preparation cycle,high cost,and small lyophobic area,which are very unfavorable for lyophobic technology.Promotion.Based on the above problems,this paper proposes a variety of processing methods for improving the wettability of polymer surfaces.The most important factors affecting surface wetting properties are the surface free energy(chemical composition)and surface microstructure of the solid.Therefore,based on the experiment of polymer modification and microstructure,the influencing factors of the wettability of common polymer surfaces were investigated.In this paper,we study the regular polygon array micro-structure modifiedpolymer surface arrays,orderly array micro-nano-quartz modified LDPEsurface lattice grids,blended silicone masterbatch to prepare special wettability surface,surface coating method to further improve the surface finish Wet properties,modified PDMS surface wetting properties of surface modifier molecular design.This article provides new ideas for the preparation of special wettable surfaces for polymers.The main work results are as follows:The influence of microstructure on the wettability of polymer surface was studied,and the preparation technology of special wetting surface with low cost and large size was studied.Polygonal micro-structure modification of the polymer surface through the array of experiments,the most widely used in the current five kinds of polymer LDPE,PP,ABS,PMMA as experimental materials,triangular microstructures and hexagonal microstructure as the mold,with injection micro The structure is a processing method,a special wetting surface is prepared,the contact angle of the deionized water and the detergent with a very low surface energy on the surface is tested,and the preparation method of the special wettability surface with low cost and large size is explored.The effects of triangular and hexagonal microstructures on the surface wetting properties were investigated.By orderly arranging micro-nano-silica-modified polycarbonate surfaces on a square grid network,the dispersed micro-nano-sized quartz powders are uniformly arranged in a smaller-sized micro-nano-square lattice network,and hot embossing is used as a technical means.The"coarse fine mesh" structure was modified on the surface of LDPE to form a"coarse fine head" microstructure,and an ultra-hydrophobic,special wetting surface was prepared.A special wettability table was prepared by blending silicone masterbatch with surface-coated silica and a light diffuser,and the effect of the surface chemical composition on the wettability of the solid surface was studied.The surface of the polymer was modified by blending the silicone masterbatch,and two kinds of polymers PP and LLDPE,which are the most widely used in engineering,were used as experimental materials,and triangular wetted and hexagonal microstructures were used as molds to prepare special wettability surfaces.The contact angles between deionized water and salad oil on the surface were tested,and the preparation techniques for special wettability surfaces with low cost and large size were continued to be improved,and the influence of the gaps of the microstructure monomers on the orientation of the special branches of the polymer was investigated..A special wetting surface was prepared by coating LLDPE,PP pure tablets and their blended samples into a film,and the contact angles of deionized water,ethylene glycol and formamide on the surface were tested and calculated according to the LW-AB method.The surface energy of the corresponding solids was compared with the coating modification effect of the nano-silica and the light diffuser.In addition,the molecular design of the surface modifier was studied in terms of the choice of pro-matrix end,the choice of hydrophobic matrix,the structure of the molecular chain,the size of the molecular weight,and the copolymerization method.