Modified high polymer material as well as preparation method and application thereof

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 cost, technical difficulty, and difficulty in meeting the requirements of industrial production.

Active Publication Date: 2022-04-01
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

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  • Modified high polymer material as well as preparation method and application thereof
  • Modified high polymer material as well as preparation method and application thereof
  • Modified high polymer material as well as preparation method and application thereof

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Experimental program
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Embodiment 1

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

[0032] S1. SiO with surface fluorine and long alkyl chains 2 Preparation of nanospheres: 10g N-β(aminoethyl)-γ-aminopropyltriethoxysilane, 2g 1H,1H,2H,2H-perfluorodecyltrimethoxysilane and 1g dodecyl Dissolve trimethoxysilane in 50mL of dichloromethane and mix well to obtain an oil phase; add dropwise 30mL of an aqueous solution containing 2wt% Tween-80 to the oil phase, emulsify at 10000r / min for 3min, and react at 500r / min 5h, centrifuged and washed, dried to obtain SiO with surface fluorine and long chain alkyl chains 2 nanospheres;

[0033] S2. Modified SiO 2 Preparation of nano-microspheres: 10 g of SiO with fluorine and long-chain alkyl chains on the surface prepared in step S1 2 Add 20mL of silane coupling agent A151 in ethanol aqueous solution (the content of silane coupling agent A151 is 3wt%, the ethanol content is 40wt%, and the balance is water)...

Embodiment 2

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

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

[0038] S2. Modified SiO 2 Preparation of nano-microspheres: 10 g of SiO with fluorine and long-chain alkyl chains on the surface prepared in step S1 2 Add 50mL of silane coupling agent KH570 in ethanol aqueous solution (the content of silane coupling agent KH570 is 5wt%, the ethanol content is 60wt%, and the balance is water) in...

Embodiment 3

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

[0042] S1. SiO with surface fluorine and long alkyl chains 2 Preparation of nanospheres: 10g of N-β(aminoethyl)-γ-aminopropylmethyldimethoxysilane, 3.5g of 1H,1H,2H,2H-perfluorooctyltrimethoxysilane and 2g of ten Dissolve octaalkylsiloxane in 50mL ethyl acetate, mix well to obtain an oil phase; add 30mL aqueous solution containing 3.5wt% sodium octadecylsulfonate dropwise to the oil phase, emulsify at 12500r / min for 5min, React at 700r / min for 6h, centrifuge, wash, and dry to obtain SiO with fluorine and long-chain alkyl chains on the surface 2 nanospheres;

[0043] S2. Modified SiO 2 Preparation of nano-microspheres: 10 g of SiO with fluorine and long-chain alkyl chains on the surface prepared in step S1 2 Add 35mL of silane coupling agent A171 ethanol aqueous solution (the content of silane coupling agent A171 is 4wt%, the ethanol content is 50wt%, and th...

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Abstract

The invention provides a modified high polymer material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. Comprising the following steps: S1, preparing SiO2 nano microspheres containing fluorine and a long-chain alkyl chain on the surface; s2, preparing the modified SiO2 nano microspheres; s3, preparing the modified high polymer material. The prepared modified high polymer material has a lotus-leaf-like structure, a micro-nano secondary coarse structure exists on the surface of the high polymer material, small bulges are formed on the modified silicon dioxide microspheres, and meanwhile, the micro-nano secondary coarse structure has a good mechanical property. A layer of low-surface-energy fluorine-containing groups (including fluorine-containing polyacrylate copolymerized on a polypropylene molecular chain and fluorine-containing groups on the surfaces of the modified silicon dioxide microspheres) are arranged on the upper surface of the micro-nano structure, so that a super-hydrophobic structure is formed, the super-hydrophobic structure has extremely low liquid adsorbability when being applied to the pipette tip, and the accuracy of the pipette is further improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a modified polymer material and its preparation method and application. Background technique [0002] Materials with extremely low surface free energy can exhibit many excellent properties such as outstanding stain resistance, weather resistance, high heat resistance and high acid and alkali resistance. It can be widely used in fields such as water-proof, oil-proof, and dirt-proof treatment that can be widely used in industrial production. Fluoropolymers and silicones are representative of two classes of materials with very low surface energies. Among them, fluorine in fluorine-containing polymers has the highest electronegativity among all elements, and the van der Waals atomic radius is the smallest except hydrogen, the polarizability of fluorine atoms is the lowest, and the bond energy of the single bond formed by fluorine atoms and carbon atoms Compared with the b...

Claims

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Application Information

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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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