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Super-hydrophobic wear-resistant polypropylene film and preparation method thereof

A polypropylene film, super-hydrophobic technology, applied in the field of polymer materials, can solve the problems of easy loss of compatible hydrophobic agents and wear-resistant agents

Inactive Publication Date: 2021-05-28
曾小华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a superhydrophobic and wear-resistant polypropylene film and its preparation method, by block polymers and wear-resistant agents with hydrophobic effect on the polypropylene molecular chain, so that polypropylene The material is superhydrophobic and wear-resistant. Hydrophobic molecules and wear-resistant agents are combined with polypropylene in the form of covalent bonds, which overcomes the need to physically mix hydrophobic agents and wear-resistant agents into polypropylene substrates, and there is no hydrophobicity. The problem of poor compatibility between additives and anti-wear agents and polymers and the easy loss of hydrophobic agents and anti-wear agents, superhydrophobicity and anti-wear properties have a synergistic effect

Method used

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  • Super-hydrophobic wear-resistant polypropylene film and preparation method thereof
  • Super-hydrophobic wear-resistant polypropylene film and preparation method thereof
  • Super-hydrophobic wear-resistant polypropylene film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 4-cyano-4-(thiobenzoyl)valeric acid (5.0mmol) was added to the 50ml side-neck flask equipped with a stirring bar, 20ml anhydrous tetrahydrofuran THF was added with a syringe, and chlorination was slowly added dropwise under constant stirring. Sulfoxide SOCl 2 (50.0 mmol), the temperature of the oil bath was raised to 75°C, refluxed for 2.5 h, and the SOCl was distilled off under reduced pressure after the reaction was completed. 2 and THF to obtain a yellow oily product, which was dissolved in an appropriate amount of toluene solution.

[0035] Add single-end hydroxy polypropylene PP-OH (0.8 mmol) into a 100 mL branch-neck flask equipped with a stirrer, and after filling with nitrogen three times, under N 2 Under the atmosphere, add 30ml of anhydrous toluene, under constant stirring, slowly heat the oil bath temperature to 70°C, after the polymer is completely dissolved, add 1.5ml of pyridine, and slowly add the above yellow dissolved in toluene solution after 40min. ...

Embodiment 2

[0037] The polypropylene macromolecular chain transfer agent (0.1 mmol), silane coupling agent (10 mmol), AIBN (0.01 mmol) and 5 mL of dioxane prepared in Example 1 were added to a 10-ml Schlenk bottle with a stirring bar. , set the temperature of the oil bath to 75°C, and after three cycles of liquid nitrogen freezing-pumping-thawing, place the Schlenk bottle in the oil bath reaction pot for polymerization reaction, and immediately take out the Schlenk bottle and put it in liquid nitrogen after 3 hours of reaction. After cooling, the crude product was repeatedly precipitated in anhydrous ether, and the precipitate was filtered and vacuum-dried to obtain a superhydrophobic polypropylene block copolymer with a yield of 72.8%.

Embodiment 3

[0039] The superhydrophobic polypropylene block copolymer (0.1 mmol), anti-wear agent (10 mmol), AIBN (0.01 mmol) and 5 mL of dioxane prepared in Example 2 were respectively added to a 10-ml Schlenk bottle with a stirring bar. , set the temperature of the oil bath to 75°C, and after three cycles of liquid nitrogen freezing-pumping-thawing, place the Schlenk bottle in the oil bath reaction pot for polymerization reaction, and immediately take out the Schlenk bottle and put it in liquid nitrogen after 3 hours of reaction. After cooling, the crude product was repeatedly precipitated in anhydrous ether, and the precipitate was filtered and vacuum-dried to obtain a superhydrophobic wear-resistant polypropylene block copolymer with a yield of 67.9%.

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Abstract

The invention discloses a super-hydrophobic wear-resistant polypropylene film and a preparation method thereof. The super-hydrophobic wear-resistant polypropylene film is formed by dissolving super-hydrophobic wear-resistant polypropylene block copolymer granules in a mixed solvent of xylene, toluene and benzene. The polymer with hydrophobic effect and the wear-resistant agent are blocked on a polypropylene molecular chain, so that the polypropylene material has super-hydrophobicity and wear resistance, hydrophobic molecules and the wear-resistant agent are combined with polypropylene in the form of covalent bonds. The invention overcomes the defect that when the hydrophobic agent and the wear-resistant agent are added into a polypropylene base material by a physical mixing method, the system has poor compatibility of the hydrophobic agent and the wear-resistant agent with the polymer and easy loss of the hydrophobic agent and the wear-resistant agent.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a super-hydrophobic wear-resistant polypropylene film and a preparation method thereof. Background technique [0002] Polypropylene is inexpensive, environmentally friendly, widely used, and has excellent mechanical properties, heat resistance, electrical properties, chemical stability and weather resistance; superhydrophobic materials based on polypropylene are used in self-cleaning materials, drag reduction coatings, It has a wide range of uses in anti-corrosion, waterproof, anti-fog, anti-pollution, etc.; polypropylene has good physical, mechanical, chemical properties and easy processing properties, and is lightweight, cheap, and easy to recycle, so it is widely used in automotive interior and exterior trims However, the wear resistance of polypropylene materials is poor, and some parts that are easily subjected to constant friction from the outside world, such as brake lamp ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08J5/18C08J7/02C08F293/00C08F230/08C08F220/68C08F2/38
CPCC08F2/38C08F220/68C08F293/005C08F2438/03C08J5/18C08J7/02C08J2353/00C08F230/085
Inventor 曾小华
Owner 曾小华
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