| Wettability is an important property of material surface,and its existence has a great impact on the use of materials.Superhydrophobicity is a special performance,such as lotus leaves out of silt without dyeing,water Striders can walk freely on the surface,etc.At the same time,superhydrophobic surface has excellent properties such as self-cleaning,anti-fouling,anti-corrosion,anti-fog,anti-ice and so on.It has been a hot research topic in scientific research and industrial production.At present,many types of superhydrophobic surfaces have been prepared by researchers,but most of them are difficult to be applied in practice.First,the preparation process of superhydrophobic surface is complicated,the cycle is long,the raw material price is high and the source channel is narrow;second,people pay more attention to the superhydrophobic properties of the prepared superhydrophobic surfaces,instead of actual industrial production and application.Therefore,simple preparation process,low cost and stable superhydrophobicity are an important research direction in the preparation of superhydrophobic surfaces.In this paper,the superhydrophobic surface was prepared by using phase inversion method as the main preparation method,combined with other simple methods and economical raw materials.While superhydrophobic properties were obtained,the corrosion resistance,self-cleaning ability and wear resistance of superhydrophobic surfaces were studied,which provided a new strategy for the preparation of applied superhydrophobic surface materials.The research contents of this paper are as follows:（1）Carbon deposition particles were obtained by burning soybean oil.Carbon deposition particles were dispersed in deionized water with sodium stearate as emulsifier to obtain carbon deposition particles/sodium stearate suspension.Stearic acid was obtained by reaction of glacial acetic acid and sodium stearate.Stearic acid was deposited on the filter membrane by vacuum filtration.Finally,superhydrophobic carbon deposition particles were prepared by water evaporation-induced reversal.The water contact angle（WCA）and rolling angle（SA）of superhydrophobic carbon soot particles hybrid film（SCPHF）are greater than 150°and less than 5°.The effects of preparation conditions such as the ratio of carbon deposition particles to sodium stearate and water evaporation temperature on hydrophobic properties were studied in detail.When the water evaporation temperature is between 70℃and 77.5℃,the contact angle of the surface of CPHF（sodium stearate content is 24.8wt%）is 152-155°,and the sliding angle is less than 3°.The hydrophobicity of the composite film increased with the increase of sodium stearate（SST）content and the contact angle was more than 150°when the evaporation temperature was 75℃.The acid and alkali resistance of SCPHF was also investigated.It was found that the contact angle remained superhydrophobic and had good stability when the surface of SCPHF was in contact with droplets in the range of p H=1-13.The ratio of contact area between droplet and surface is 0.283 calculated by Cassie theory.In addition,superhydrophobic carbon deposited particle composite films have potential application in the field of self-cleaning.（2）Using poly（vinylidene fluoride）（PVDF）as low surface energy material,dissolved in N,N-two methyl formamide（DMF）to form PVDF/DMF solution,solidified gel in air and water bath,and then prepared super hydrophobic PVDF surface by low temperature treatment and freeze-drying.The effect of low temperature treatment on the surface roughness and hydrophobicity of PVDF was discussed.When the surface of PVDF was treated at-20℃,the hydrophobic angle increased to 154°and the rolling angle was about 5°.The abrasion resistance,acid and alkali resistance and oil absorption properties of superhydrophobic PVDF-20were investigated.It was found that the surface contact angle of PVDF-20remained superhydrophobic after strong acid and alkali corrosion,water impingement,finger touch and tape tearing.The hydrophobicity of the surface of PVDF-20was investigated after serious damage by external force.It was found that the hydrophobicity of the surface of PVDF-20remained unchanged even after50 laps of grinding.The results show that PVDF-20has good lipophilicity and can quickly absorb various organic solvents and oils,and can be repeatedly absorbed and desorbed for volatile organic solvents.（3）y mixing acetone as a cosolvent,the epoxy resin（ER-44）and modified PVDF were evenly mixed into N,N-two methyl acetamide（DMAc）,and a certain amount of two ethylene three amine was used to open the ring of epoxy resin in the mixed solution.Then the mixture was sol-gel in air and water respectively,and then ER-44/modified PVDF composite（EPCM）was obtained by freeze drying.EPCM superhydrophobic surface was obtained by surface treatment of EPCM.The factors affecting the adhesion,hydrophobicity and compatibility of the composite coatings were investigated.It was found that the introduction of ER-44made the modified PVDF adhering to the substrate surface better.With the increase of ER-44 content,the strength of EPCM increased,but the hydrophobicity of EPCM surface decreased.Acetone as a cosolvent can reduce the mass transfer resistance caused by the immiscibility between ER-44 and modified PVDF,and promote the formation of homogeneous phase.After the introduction of acetone,the surface of the composite becomes more homogeneous.After polishing,the contact angle of EPCM is greater than 150°and the sliding angle is less than10°.The acid and alkali resistance of EPCM was studied.The results showed that EPCM could maintain contact angle greater than 150°under long time contact of strong alkali droplets,showing strong alkali corrosion resistance. |
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