Method for preparing fluorine-containing polydimethylsiloxane anti-icing material

A polydimethylsiloxane, anti-icing technology, applied in the field of preparation of new polymer materials, can solve the problems of over-viscosity of the solution, processing, high melting point of highly fluorinated polymers, etc.

Inactive Publication Date: 2018-06-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of fluorinated polymers to provide these desired properties is generally impractical because highly fluorinated polymers are difficult to pass through extrusion due to their relatively high melting point (PTFE 330°C) and too viscous a melt. or injection molding for processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation method of the anti-icing F-PDMS-co-PMMA polymer material of this embodiment comprises the following steps:

[0017] 1. Add the ratio of AIBN:MMA:F-PDMS=1:100:1 into 50ml round-bottomed flasks respectively, then add tetrahydrofuran to dissolve, slowly raise the temperature to 70°C in an oil bath, react for 8h, and then dissolve the obtained product naturally Cool down. The product was precipitated while stirring in n-hexane solution, and then the filter residue was collected by suction filtration; the crude product was dissolved in refined tetrahydrofuran, and precipitated and washed for 3-5 times; finally, the obtained F-PDMS-co-PMMA solid was placed in Dry in a vacuum oven for 24 hours to collect the F-PDMS-co-PMMA product.

[0018] 2. Prepare 3wt% F-PDMS-co-PMMA solution, dissolve 0.3g of F-PDMS-co-PMMA in 9.7g of chloroform, and drop-coat the prepared F-PDMS-co-PMMA solution on a clean glass slide , naturally formed a film at room temperature for 12...

Embodiment 2

[0021] The preparation method of the anti-icing F-PDMS-co-PMMA polymer material in this example is the same as that of Example 1, only the first step is different:

[0022] 1. Add the ratio of AIBN:MMA:F-PDMS=1:200:1 into 50ml round bottom flask respectively, then add tetrahydrofuran to dissolve, slowly raise the temperature to 70°C in an oil bath, react for 8h, and then dissolve the obtained product naturally Cool down. The product was precipitated while stirring in n-hexane solution, and then the filter residue was collected by suction filtration; the crude product was dissolved in refined tetrahydrofuran, and precipitated and washed for 3-5 times; finally, the obtained F-PDMS-co-PMMA solid was placed in Dry in a vacuum oven for 24 hours to collect the F-PDMS-co-PMMA product.

[0023] The obtained membrane material has a mean square roughness (Ra=0.511) of less than 1 nm and successfully constructs an ultra-smooth surface. Compared with the static contact angle CA=100.4° o...

Embodiment 3

[0025] The preparation method of the anti-icing F-PDMS-co-PMMA polymer material in this example is the same as that of Example 1, only the first step is different:

[0026] 1. Add the ratio of AIBN:MMA:F-PDMS=1:300:1 into 50ml round bottom flask respectively, then add tetrahydrofuran to dissolve, slowly raise the temperature to 70°C in an oil bath, react for 8h, and then dissolve the obtained product naturally Cool down. The product was precipitated while stirring in n-hexane solution, and then the filter residue was collected by suction filtration; the crude product was dissolved in refined tetrahydrofuran, and precipitated and washed for 3-5 times; finally, the obtained F-PDMS-co-PMMA solid was placed in Dry in a vacuum oven for 24 hours to collect the F-PDMS-co-PMMA product.

[0027] The obtained membrane material has a mean square roughness (Ra=0.377) of less than 1 nm and successfully constructs an ultra-smooth surface. Compared with the static contact angle CA=100.4° o...

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Abstract

A method for preparing a fluorine-containing polydimethylsiloxane anti-icing material comprises the following steps: respectively adding AIBN, MMA and F-PDMS into a 50 ml round-bottom flask, dissolving above substances in tetrahydrofuran, slowly heating the obtained solution in an oil bath to 70 DEG C, performing a reaction for 8 h, naturally cooling the obtained product, precipitating the productin an n-hexane solution while stirring, performing suction filtration, and collecting obtained filter residues; dissolving the obtained crude product in purified tetrahydrofuran, washing the obtainedprecipitate 3-5 times, drying the washed precipitate in a vacuum drying box for 24 h, and collecting the obtained F-PDMS-co-PMMA product; and dispensing a prepared 3wt% F-PDMS-co-PMMA solution on a clean glass sheet, allowing the solution to naturally form a film at room temperature for 12h, and drying the film in the vacuum drying box at 50 DEG C for 24h. The material has the characteristics ofsimple preparation process and superior anti-icing performance.

Description

technical field [0001] The invention relates to a preparation method of a novel polymer material, in particular to a preparation method of a polymer material mainly composed of fluorine-containing polydimethylsiloxane. technical background [0002] Polydimethylsiloxane (PDMS) is widely used in various fields such as coatings, mechanical fluids and textiles due to its excellent properties. Due to their excellent properties, silicone rubbers and resins have been widely used in automobiles, electrical accessories, medical / health, appliances, consumer products, textile coatings, business machines, coatings and molds. A disadvantage of PDMS is its susceptibility to hydrolysis under acidic or basic conditions. Fluorinated polymers have low surface energy, are chemically inert, and have a low coefficient of friction. However, the use of fluorinated polymers to provide these desired properties is generally impractical because highly fluorinated polymers are difficult to pass throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F220/14C08J5/18
CPCC08F283/12C08J5/18C08J2351/08C08F220/14
Inventor 和玲赵凌儒
Owner XI AN JIAOTONG UNIV
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