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A modified polymer material and its preparation method and application

A polymer material and modification technology, which is applied in the field of modified polymer materials and its preparation, can solve the problems of high technical difficulty, high cost, and difficulty in meeting the requirements of industrial production.

Active Publication Date: 2022-05-24
上海科进生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent CN105860120A uses isotactic polypropylene-b-polyethylene glycol diblock as a surface modifier to construct a micro-nano composite structure on the surface of polypropylene film, so that the material can obtain super-hydrophobic properties; however, this method is aimed at It is a polypropylene film material. At the same time, it is technically difficult and costly, and it is difficult to meet the requirements of industrial production.
[0006] Patent CN107163389A adds fluorine-containing additives and silicone masterbatches to polypropylene to make the material obtain higher hydrophobicity. Although the material thus obtained has higher hydrophobicity, it does not take into account its odor, Requirements such as flame retardancy, thus limiting its application in the industry

Method used

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  • A modified polymer material and its preparation method and application
  • A modified polymer material and its preparation method and application
  • A modified polymer material and its preparation method and application

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Embodiment 1

[0031] The present embodiment provides a method for preparing a modified polymer material, comprising the following steps:

[0032] S1. SiO with fluorine and long alkyl chains on the surface 2 Preparation of nano-microspheres: 10 g of N-β(aminoethyl)-γ-aminopropyltriethoxysilane, 2 g of 1H,1H,2H,2H-perfluorodecyltrimethoxysilane and 1 g of dodecyl Trimethoxysilane was dissolved in 50 mL of dichloromethane, mixed uniformly to obtain an oil phase; 30 mL of an aqueous solution containing 2wt% Tween-80 was added dropwise to the oil phase, emulsified at 10,000 r / min for 3 minutes, and reacted at 500 r / min. 5h, centrifuged, washed, and dried to obtain SiO containing fluorine and long-chain alkyl chains on the surface 2 Nanospheres;

[0033] S2. Modified SiO 2 Preparation of nano-microspheres: 10 g of SiO containing fluorine and long-chain alkyl chains on the surface prepared in step S1 2 The nanospheres were added to 20 mL of ethanol aqueous solution of silane coupling agent A15...

Embodiment 2

[0036] The present embodiment provides a method for preparing a modified polymer material, comprising the following steps:

[0037] S1. SiO with fluorine and long alkyl chains on the surface 2 Preparation of nanospheres: Dissolve 10 g of γ-aminopropyltrimethoxysilane, 5 g of 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane and 3 g of hexadecyltrimethylsiloxane in 50 mL In petroleum ether, mix well to obtain an oil phase; add 30 mL of an aqueous solution containing 5wt% sodium hexadecyl sulfate dropwise to the oil phase, emulsify at 15000r / min for 7min, react at 1000r / min for 7h, centrifugally wash, and dry , to obtain SiO containing fluorine and long alkyl chains on the surface 2 Nanospheres;

[0038] S2. Modified SiO 2 Preparation of nano-microspheres: 10 g of SiO containing fluorine and long-chain alkyl chains on the surface prepared in step S1 2 Nano-microspheres were added to 50 mL of ethanol aqueous solution of silane coupling agent KH570 (the content of silane coupling a...

Embodiment 3

[0041] The present embodiment provides a method for preparing a modified polymer material, comprising the following steps:

[0042] S1. SiO with fluorine and long alkyl chains on the surface 2 Preparation of nano-microspheres: 10g N-β(aminoethyl)-γ-aminopropylmethyldimethoxysilane, 3.5g 1H,1H,2H,2H-perfluorooctyltrimethoxysilane and 2g ten The octaalkylsiloxane was dissolved in 50 mL of ethyl acetate, and mixed uniformly to obtain an oil phase; 30 mL of an aqueous solution containing 3.5wt% sodium octadecyl sulfonate was added dropwise to the oil phase, and emulsified at 12500 r / min for 5 min. The reaction was carried out at 700 r / min for 6 h, centrifuged, washed, and dried to obtain SiO containing fluorine and long-chain alkyl chains on the surface. 2 Nanospheres;

[0043] S2. Modified SiO 2 Preparation of nano-microspheres: 10 g of SiO containing fluorine and long-chain alkyl chains on the surface prepared in step S1 2 Nano-microspheres were added to 35 mL of ethanol aqu...

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Abstract

The invention provides a modified polymer material and its preparation method and application, belonging to the technical field of polymer materials. Including the following steps: S1. SiO with surface fluorine and long chain alkyl chains 2 Preparation of nanospheres; S2. Modified SiO 2 Preparation of nano-microspheres; S3. Preparation of modified polymer materials. The modified polymer material prepared by the present invention has a lotus leaf imitation structure, and there are micro-nano secondary rough structures on the surface of the polymer material, which are small protrusions caused by modified silica microspheres. There is another layer of low surface energy fluorine-containing groups on the upper surface of the nanostructure (including fluorine-containing polyacrylate copolymerized on the polypropylene molecular chain and fluorine-containing groups on the surface of the modified silica microspheres), thus forming a superphobic The structure, applied to the pipette tip, has extremely low liquid adsorption, thereby further improving the precision of the pipette.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a modified polymer material and a preparation method and application thereof. Background technique [0002] The material with extremely low surface free energy can show many excellent properties such as outstanding fouling resistance, weather resistance, high heat resistance and high acid and alkali resistance. It can be widely used in the fields of waterproof, oil-proof, anti-fouling and anti-fouling treatment that can be widely used in industrial production. Fluoropolymers and siloxanes are two types of materials representative of extremely low surface energies. Among them, the fluorine in the fluorine-containing polymer has the highest electronegativity among all elements, and the van der Waals atomic radius is the smallest except for hydrogen, the polarizability of the fluorine atom is the lowest, and the bond energy of the single bond formed by the fluorine atom a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/10C08F292/00C08F220/24
Inventor 朱一明兰省科吕现超其他发明人请求不公开姓名
Owner 上海科进生物技术有限公司
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