Preparation And Performance Research Of Organic-Inorganic Hybrid Superhydrophobic Materials

In recent years,researchers have been inspired by various hydrophobic phenomena in nature,explored and developed various methods and materials for preparing superhydrophobic oleophobic properties,and applied them to production and life,which brought convenience to practical life and solved some problems in industrial production provide new ways.In daily life,the sudden soaking of clothes affects the beauty of personal image;in the protection of cultural relics,the dampness and mildew of precious classics will cause the lack of historical data;in the field of building protection,the aging and deterioration of wood plastic composite materials may cause the building to collapse and cause personal injury.These problems need to be prevented or resolved.In this thesis,the traditional radical polymerization method is used to synthesize polymers,hybridize with aminated nano-SiO2 to prepare superhydrophobic oleophobic materials,and apply them to the surface treatment of cotton,book papers and wood plastic composite to explore the best construction conditions and properties of modified materials.The research results have good application development prospects and practical significance.The main research results of the paper are as follows:(1)Hydrophobic cotton(HC)prepared by the hybridization of aminated nano-SiO2 and low-fluorine epoxy polymer P(TFEMA-r-GMA)hybrid assembly,the maximum water contact angle(WCA)is 150°±2 °,the minimum water rolling angle(WRA)is 16°± 2 °.HC surface has good hydrophobicity,acid and alkali resistance and self-cleaning effect.The prepared hydrophobic book paper(HBP),the maximum WCA is 150°±1° and the minimum WRA is 35°±1°.The hydrophobicity of HBP is improved,with the ability to selectively adsorb oil and water,and the smoothness is reduced.The prepared hydrophobic wood plastic composite(HWPC),the maximum WCA is 145°± 1° and the minimum WRA is 50°±1°.The water absorption rate of HWPC is reduced,the surface has a good self-cleaning effect and the thermal stability is no effect.(2)Superhydrophobic material prepared by hybrid assembly of aminated nano-SiO2 and high-fluorine epoxy polymer P(FOEMA-r-GMA).Superhydrophobic cotton(SHC)prepared by solution impregnation method and optimal construction conditions has a WCA maximum of 158°±3 ° and WRA minimum of 4°±3°.The surface of SHC has good hydrophobic effect,acid and alkali resistance and self-cleaning effect,and the maximum oil-water separation rate is 98.4%.The prepared superhydrophobic book paper(SHBP),the maximum WCA is 155°±3° and the minimum WRA is 6°±1°.The hydrophobicity of SHBP is significantly improved,the ability to selectively adsorb oil and water is stronger,and the smoothness is reduced.For the prepared hydrophobic wood plastic composite(SHWPC),the maximum WCA can reach 158°± 1° and the minimum WRA is 3°±1°.The water absorption rate of SHWPC is lower than 4.0%of unmodified wood plastic composite.The surface of SHWPC has good acid resistance,self-cleaning effect,thermal stability and mechanical properties are no effect.(3)The pH-responsive segment DMAEMA was introduced through the traditional radical polymerization method to prepare pH-responsive hydrophobic material P(DMAEMA-r-TFEMA-r-GMA).Combined with single factor and orthogonal experimental design,the reactive hydrophobic cotton(RHC)prepared by solution impregnation method and optimal construction conditions,WCA maximum is 145°±5°,RHC surface has good hydrophobic Effect,wear resistance and pH response.After the acid-base response cycle treatment,the maximum change rate of RHC oil-water separation rate is from 89.8%to 78.2%.The prepared reactive hydrophobic wood plastic composite(RHWPC)has a maximum WCA of 135°±5°.The pH of the environment affects the water absorption of RHWPC.Under the same conditions,RHWPC has the lowest water absorption under alkaline condition(pH=9).The mechanical properties and the thermal stability of RHWPC are no effect.