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Fluorine-containing bi-functional microspheres and application thereof
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A functional, microsphere technology, used in coatings, special surfaces, devices for coating liquids on surfaces, etc., can solve problems such as no one reported, and achieve the advantages of not easy to fall off and deformation, accurate performance parameters, and improved stability. Effect
Inactive Publication Date: 2014-09-10
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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Problems solved by technology
At present, there are many reports about fluorinated nanoparticles, but no one has reported the simultaneous introduction of fluorinated groups and another functional group that can participate in the reaction on the surface of nanoparticles.
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Embodiment 1
[0052] 1. Preparation of fluorine-containing bifunctional polymer microspheres
[0053] The materials used below are from:
[0054] Monomers hydroxyethylene acrylate (HEA), methyl methacrylate (MMA) and ethyleneglycol dimethacrylate (EGDMA) were purchased from Aldrich and purified by vacuum distillation before use. Monomeracrylic acid, ethylene glycol diester 2-chloropropionate was reported by literature (Ming, W.; Wu, D.; van Benthem, R.; de With, G. Nano Lett. 2005, 5: 2298-2301) method of preparation. Azobisisobutyronitrile (AIBN) was purchased from Fisher Corporation and purified by recrystallization in ethanol before use. Others were actually purchased from Aldrich Company, without special treatment before use.
[0055] The preparation steps of fluorine-containing bifunctional polymer microspheres are as follows:
[0056] Under stirring, in the there-necked flask of 500 milliliters, gradually add the mixture of 130 milliliters of distilled waters, 4.80 grams (48.0 m...
Embodiment 2
[0069] 1. Preparation of block copolymers
[0070] The materials used below are from:
[0071] (3-(triisopropoxysilyl))propylene methacrylate (IPSMA) was reported by literature (Ozaki, H.; Hirao, A.; Nakahama, S. Macromolecules 1992, 25:1391-1395.) prepared by the method;
[0072] (Heptadecafluorooctyl)ethylenemethacrylate (F 8 h 2 MA) was purchased from Aldrich Company, and the literature (Ishizone, T.; Sugiyama, K.; Sakano, Y.; Mori, H.; Hirao, A.; Nakahama, S. Polymer Journal 1999, 31: 983 -988.) report method vacuum distillation purification;
[0073] Tert-butyl acrylate (tBA) is purchased from Aldrich Company, and is purified by underpressure distillation before use;
[0074] The preparation steps of fluorine-containing bifunctional silicon spheres are as follows:
[0075]Polymer poly(3-(triisopropoxysilyl))propylene methacrylate-block-poly(heptadecafluorooctyl)ethylene methacrylate (PIPSMA-b-PF8H 2 MA) and poly(3-(triisopropoxysilyl))propylene methacrylate-block-...
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Abstract
The invention discloses a fluorine-containing bifunctionalmicrosphere and an application thereof. The fluorine-containing bifunctionalmicrosphere has a structure as shown in formula (I): wherein, B is a cross-linked polymermicrosphere, silica microsphere, aluminum oxide particle or ferricoxide particle; g Indicates grafting; FL is a structural unit containing fluorine; G is a structural unit containing hydroxyl, amine, carboxyl or epoxy; A is a structural unit containing hydroxyl, amine, carboxyl or epoxy; E1 and E2 is hydrogen, halogen or mercapto; x is 0 or 1; y is 0 or 1; m is a natural number ≥ 0, and n is a natural number ≥ 0. The fluorine-containing bifunctional microspheres can be used to modify the surface of materials to prepare hydrophobic and oleophobic coatings. The present invention retains a certain amount of hydroxyl and carboxyl groups in the process of fluorination modification of the microspheres, and fixes the microspheres on the surface of the material by using the covalent bond between the residual hydroxyl carboxyl groups and the adhesive, thereby improving the stability of the coating , is that the coating is not easy to fall off and deform.
Description
technical field [0001] The invention belongs to the field of organic materials, and in particular relates to a fluorine-containing bifunctional microsphere and its application. Background technique [0002] A super-amphiphobic surface refers to a surface on which the contact angles of water droplets and oil droplets are greater than 150°. When a droplet slides on the surface, the inclination angle of the surface should be less than 10°. Since the droplets can automatically agglomerate into spherical shapes on its surface and slide easily, such materials have good self-cleaning properties. [0003] There are many hydrophobic surfaces in nature, such as the surface of lotus leaves and the feet of water striders. Through the study of superhydrophobic materials in nature, it is found that the surfaces of these materials are composed of compounds with very low surface energy, and the surfaces of these materials have high roughness, and some even have multi-level rough surfaces. ...
Claims
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