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Method for preparing surface hydrophilic modifier for hydrophobic material

A technology of hydrophilic modifiers and hydrophobic materials, which is applied in the field of preparation of surface hydrophilic modifiers, can solve problems such as poor durability, resistance to erosion, friction, washing, and reduced mechanical strength, and achieves simple and compatible production methods Good performance, the effect of improving hydrophilicity

Inactive Publication Date: 2015-01-28
SHANGHAI CHENGYING NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the surface modification effect of the commonly used small molecule surface modifier is obvious, it is easy to diffuse into the solvent during use, and it is not resistant to erosion, friction, washing, etc., and its durability is poor, and it is easy to be lost in the external environment. Seriously shorten the service life of the product, and the use of macromolecular surface modifiers can effectively overcome the above defects
[0005] Common macromolecular surface modifiers may cause the problems of poor internal compatibility of the substrate and decreased mechanical strength, but the present invention will not cause these problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment relates to a design and preparation method of a polyvinylidene fluoride surface hydrophilic modifier. The method includes the following process steps: weighing allyl alcohol polyoxyethylene ether (polyethylene glycol derivative, molecular weight 2000 ) 10 parts in 200 parts of water, and 0.1 parts of potassium persulfate (peroxide initiator) and 10 parts of lauryl methacrylate monomer, stirred at a high speed at 25 ° C in a temperature-controllable high-speed mixer, After 48 hours, the product was dissolved and precipitated, and dried.

[0029] The obtained product was added to the polyvinylidene fluoride solution at a mass ratio of 3%, 6%, 9%, and 12%, and a film was made by using the solution phase inversion method. The measured surface contact angle changed from 105° to 101° , 92°, 78°, 63°, the surface hydrophilic property is significantly improved, and the gradient correlation can explain the improvement caused by the modifier. The elongation at br...

Embodiment 2

[0031] This embodiment relates to a design and preparation method of a polyvinyl chloride surface hydrophilic modifier, the method comprising the following process steps: weighing polyethylene glycol methacrylate (polyethylene glycol derivatives, molecular weight 10000 ) 20 parts in 100 parts of n-propyl acetate, and weighed 0.5 parts of tert-butyl hydroperoxide (initiator) and 25 parts of lauryl methacrylate monomer, in a temperature-controllable high-speed mixer at 40 ° C Stir at high speed, dissolve and precipitate the product after 24 hours, and dry it.

[0032] The obtained product was added into polyvinyl chloride pellets with 3%, 6%, 9%, 12% mass ratio, blended using a twin-screw extruder, and injected into a sample. The measured surface contact angle was 118° from that which had never been added. , changed to 109°, 102°, 95°, 79°, the surface hydrophilic property was significantly improved, and the gradient correlation can explain the improvement caused by the modifier...

Embodiment 3

[0034] This embodiment relates to a design and preparation method of a polystyrene surface hydrophilic modifier, the method comprising the following process steps: weighing 50 parts of polyethylene glycol monomethyl ether methacrylate (molecular weight 100) in Dissolve in 100 parts of butyl acetate, and weigh 5 parts of peroxide initiator and 50 parts of lauryl methacrylate monomer, stir at 25°C in a temperature-controllable high-speed mixer, and dissolve the product after 48 hours Precipitate and dry.

[0035] The obtained product was added into polystyrene pellets at a mass ratio of 3%, 6%, 9%, and 12%, blended using a twin-screw extruder, and injected into a sample. The measured surface contact angle was 108° from that which had never been added. , changed to 101°, 92°, 85°, and 74°, the surface hydrophilic property was significantly improved, and the gradient correlation can explain the improvement caused by the modifier. The elongation at break measured by a universal te...

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Abstract

The invention relates to the technical field of surface modification, and relates to a method for preparing a surface hydrophilic modifier for a hydrophobic material. The modifier is an amphiphilic block polymer with molecular weight in gradient distribution. The method comprises the following steps: dissolving a polyethylene glycol derivative in a solvent, weighing a free radical polymerization reaction initiator and a lauryl methacrylate monomer, putting the above component into a high-speed mixing machine, stirring at high speed, subsequently dissolving and depositing a product, and drying, thereby obtaining the modifier, wherein the weight part ratio of the polyethylene glycol derivative to the solvent to the free radical polymerization reaction initiator to the lauryl methacrylate monomer is (10-50) to (100-1000) to (0.1-5) to (10-50). The surface hydrophilic modifier synthesized by using the method is used for performing surface modification on resin, not only is the surface hydrophilicity improved, but also the flexibility of substrate resin is improved, and thus the surface hydrophilic modifier can be widely applied to the fields such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinylidene fluoride and ABS.

Description

technical field [0001] The invention belongs to the technical field of surface modification, and in particular relates to a preparation method of a surface hydrophilic modifier for hydrophobic materials. Background technique [0002] Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyvinylidene fluoride (PVDF) and other resins have been widely used due to their superior performance, but their surface is extremely The relatively small resistance leads to poor surface hydrophilicity and surface adhesion, which greatly limits the expansion of its application range. Therefore, surface modification of matrix polystyrene has become an important means to improve its comprehensive performance. [0003] The traditional surface modification method not only requires special equipment, but also is expensive, and it is difficult to obtain a complete and uniform functionalized surface. The method of adding surface modifiers to realize surface function...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/18C08F220/28C08L51/06C08L27/12C08J5/18C08L33/04C08L27/06C08L25/06C08L23/12C08L23/06C08L55/02
Inventor 虞明东杜德丁万强
Owner SHANGHAI CHENGYING NEW MATERIALS
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