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Method for preparing ultra-smooth antifouling surface by grafting modified hollow microspheres with lubricating oil

A lubricating oil and modification technology, which is applied to the surface coating liquid device, pretreatment surface, anti-fouling/underwater coating, etc., can solve the problem that the surface oil storage is small, and the lubricating oil wicking effect cannot ensure that the holes are completely Filling, cumbersome process and other problems to achieve the effect of improving stability and good self-healing performance

Active Publication Date: 2020-12-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems that cannot be overcome on the surface of SLIPS: 1) most of the substrates used need to build complex and fine rough structures, which requires cumbersome processes and complicated equipment, which is time-consuming and expensive; 2) most Smooth liquid-infused porous surfaces SLIPS are prepared by immersing rough substrates in lubricating oil, the capillary force and wicking of lubricating oil by the rough structure cannot guarantee the complete filling of pores; 3) Although the lubricant is chemically inert , but molecular diffusion is always going on
However, there are still many problems in the super slippery surface developed at present, such as the combination fastness between lubricating oil and the substrate needs to be improved, the durability is poor, the surface oil storage is small, and the method of constructing rough structure is complicated and universal.

Method used

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  • Method for preparing ultra-smooth antifouling surface by grafting modified hollow microspheres with lubricating oil
  • Method for preparing ultra-smooth antifouling surface by grafting modified hollow microspheres with lubricating oil
  • Method for preparing ultra-smooth antifouling surface by grafting modified hollow microspheres with lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A method for preparing a cotton fabric with an ultra-slip antifouling surface, comprising the steps of:

[0066] (1) Add 10g of styrene, 2.5g of polyvinylpyrrolidone K30, and 100mL of water into a 250mL three-necked flask, and stir for 30min under nitrogen at room temperature; then add 0.41g of azobisisobutylamidine hydrochloride, Under stirring reaction 24h, obtain polystyrene emulsion;

[0067] (2) Dissolve 1.5g of tetraethyl orthosilicate, 1.31g of cetyltrimethylammonium bromide and 7mL of polystyrene emulsion in 40mL of absolute ethanol, add 1mL of ammonia water, mix and stir, and react at 50°C for 3h. After three times of centrifugal washing and drying, silica-coated polystyrene microspheres (PS@SiO 2 ); PS@SiO 2 Calcined in a muffle furnace at 500°C±5°C for 3h to obtain hollow mesoporous silica nanoparticles (HMS); the particle size of the silica is 280±3.8nm, and the shell thickness is 30±4.6nm;

[0068] (3) 1g of HMS and 5g of 3-mercaptopropyltriethoxysilane ...

Embodiment 2

[0077] A method for preparing a copper sheet with an ultra-slippery antifouling surface, comprising the steps of:

[0078] (1) Add 10g of styrene, 2.5g of polyvinylpyrrolidone K60, and 100mL of water into a 250mL three-neck flask, and stir for 30min at room temperature with nitrogen gas; then add 0.41g of ammonium persulfate, and stir and react at 70°C for 24h to obtain polystyrene emulsion;

[0079] (2) Dissolve 1.5g of tetraethyl orthosilicate, 1.31g of cetyltrimethylammonium bromide and 7mL of polystyrene emulsion in 40mL of absolute ethanol, add 1mL of ammonia water, mix and stir, and react at 50°C for 3h. PS@SiO was obtained after centrifugal cleaning three times and drying 2 ;PS@SiO 2 Calcined at 500°C±5°C for 3h in a muffle furnace to obtain hollow mesoporous silica nanoparticles (HMS); the particle size of the silica is 277±7.1nm, and the shell thickness is 28±3.8nm

[0080] (3) 1g of HMS and 5g of vinyltriethoxysilane are uniformly dispersed in 44g of absolute etha...

Embodiment 3

[0084] A method for preparing glass with an ultra-slip antifouling surface, comprising the steps of:

[0085] (1) Add 10g of styrene, 2.5g of polyvinylpyrrolidone K30, and 100mL of ethanol into a 250mL three-necked flask, and stir for 30min under nitrogen at room temperature; then add 0.41g of azobisisobutyronitrile, and stir the reaction at 70°C 24h, obtain polystyrene emulsion;

[0086] (2) Dissolve 1.5g of tetraethyl orthosilicate, 1.31g of cetyltrimethylammonium bromide and 7mL of polystyrene emulsion in 40mL of absolute ethanol, add 1mL of ammonia water, mix and stir, and react at 50°C for 3h. PS@SiO was obtained after centrifugal cleaning three times and drying 2 ; will PS@SiO 2 Calcined in a muffle furnace at 500°C±5°C for 3h to obtain hollow mesoporous silica nanoparticles (HMS); the particle size of the silica is 288±3.2nm, and the shell thickness is 26±4.6nm;

[0087] (3) Disperse 1g of HMS and 5g of 3-glycidyloxypropyltrimethoxysilane evenly in 44g of absolute et...

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Abstract

The invention discloses a method for preparing an ultra-smooth antifouling surface by grafting modified hollow microspheres with lubricating oil, and belongs to the technical field of nano antifoulingcoatings. The preparation method comprises the following steps: firstly, preparing hollow mesoporous silica microspheres by adopting a template etching method, and selecting a proper modifier to perform one-step or multi-step modification on the surface of hollow mesoporous silica so as to introduce a reaction group to the surface; assembling the hollow mesoporous silica on a base material by using an adhesive, and performing thermocuring to stably fix the hollow mesoporous silica on the surface of a substrate; and then grafting polydimethylsiloxane with an active end group to an active siteon the surface of a modified microsphere through a covalent grafting reaction so as to prepare a stable super-lubricity lyophobic surface having a self-repairing function. The ultra-smooth antifoulingsurface prepared by the method can meet the antifouling requirements of common base materials, and is good in stability and simple and convenient in application process.

Description

technical field [0001] The invention relates to a method for preparing a super-slip antifouling surface by grafting lubricating oil with modified hollow microspheres, and belongs to the technical field of nano antifouling coatings. Background technique [0002] The surface with special wetting function has always been a research hotspot in the field of surface interface because of its unique application effects in the fields of oil-water separation, microfluidic control, anti-corrosion, anti-fouling self-cleaning, anti-fog and anti-icing. Since the discovery of "smooth liquid-infused porous surfaces (SLIPS)", SLIPS surfaces have received continuous attention and development due to their excellent lyophobic properties. This surface constructs a strong, ultraslip, continuous liquid interface by filling the porous structure with lubricant. However, there are still many problems that cannot be overcome on the surface of SLIPS: 1) most of the substrates used need to build comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D06M11/79C09D5/16C09D183/04C03C17/38B05D3/10D06M101/06
CPCB05D3/102B05D7/16B05D2202/45C03C17/38C09D5/1681C09D183/04D06M11/79D06M15/643D06M2101/06D06M2200/01
Inventor 付少海刘明明于梦楠李敏张丽平王冬
Owner JIANGNAN UNIV
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