Surface modification method for polyolefin material

A surface modification, polyolefin technology, applied in the direction of fiber type, textile and papermaking, fiber processing, etc., can solve the problems of shortened grafting time, volatile solvent, easy loss of surface polarity, etc., to achieve uniform functionalization treatment, The effect of shortening the grafting time

Active Publication Date: 2019-04-26
宿迁市南京工业大学新材料研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although chemical oxidation, plasma treatment, corona discharge treatment and other methods can effectively introduce small molecular polar groups on the surface of polyolefin materials, these polar groups are unstable, and the modified surface properties are time-sensitive. Under the effect of oxidation or thermal movement of molecular chains, the surface polarity is easily lost
The surface grafting method can introduce high molecular weight polar polymers on the surface of polyolefin materials, and the modified surface has good durability, but the trad

Method used

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  • Surface modification method for polyolefin material

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Effect test

Embodiment 1

[0030] The present embodiment provides a kind of method of polyolefin material surface modification, and it comprises the following steps:

[0031] (a) Immerse the commercially available polyethylene sheet in 10% sodium hypochlorite aqueous solution by mass content, add a small amount of sodium bicarbonate (0.5-1% of the solution mass content) to adjust the pH of the aqueous solution to be 5.5-6, at 30-40 Under the condition of ℃, carry out UV irradiation for 20min (UV wavelength is 280-400nm) to carry out chlorination treatment to obtain chlorinated polyolefin material (the surface chlorination degree of chlorinated polyolefin material is 30-50%);

[0032] (b) Immerse the chlorinated polyolefin material (i.e., the surface chlorinated polyethylene sheet) in the grafting reaction solution to carry out photocatalytic-ATPR graft polymerization, and the grafting reaction solution contains: 100 parts of methyl Hydroxyethyl acrylate, 0.2 parts of pentamethyldiethyltriamine and 0.002...

Embodiment 2

[0034] The present embodiment provides a kind of method of polyolefin material surface modification, and it comprises the following steps:

[0035] (a) Immerse commercially available polypropylene biaxially stretched film in 5% sodium hypochlorite aqueous solution, add a small amount of sodium bicarbonate (0.5~1% of solution mass content) to be 5.5~6 to adjust the pH of aqueous solution, at 30~40 ℃ Carry out UV (same as in Example 1) illumination 10min under the condition of chlorination, to obtain chlorinated polyolefin material (the surface chlorination degree of chlorinated polyolefin material is 30~50%) to carry out chlorination;

[0036] (b) Immerse the chlorinated polyolefin material (i.e. the polypropylene biaxially stretched film after surface chlorination) in the grafting reaction solution to carry out photocatalytic-ATPR graft polymerization, and its grafting reaction aqueous solution contains: 100 parts Hydroxyethyl methacrylate, 0.1 part of pentamethyldiethyltriami...

Embodiment 3

[0038] The present embodiment provides a kind of method of polyolefin material surface modification, and it comprises the following steps:

[0039] (a) Immerse commercially available polyethylene-propylene copolymer film in 8% sodium hypochlorite aqueous solution, add a small amount of sodium bicarbonate (0.5~1% of solution mass content) to be 5.5~6 to adjust the pH of aqueous solution, at 30~40 ℃ Carry out UV (same as in embodiment 1) illumination 15min under the condition of chlorinating to obtain chlorinated polyolefin material (the surface chlorination degree of chlorinated polyolefin material is 30~50%) to carry out chlorination;

[0040] (b) Immerse the chlorinated polyolefin material (i.e., the surface chlorinated polyethylene-propylene copolymer film) in the grafting reaction solution to carry out photocatalytic-ATPR graft polymerization, and the grafting reaction aqueous solution contains: 100 parts Acrylamide, 0.2 parts of triethanolamine and 0.0015 parts of tricyano...

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Abstract

The invention relates to a surface modification method for a polyolefin material. The method comprises the following steps: (a), performing surface chlorination reaction on the polyolefin material ina chlorine-containing solution to obtain a chlorinated polyolefin material; (b) immersing the chlorinated polyolefin material into a grafting reaction solution for photocatalysis-atom transfer radicalreaction under the action of light irradiation. Surface modification of the polyolefin material can be realized by surface chlorination and photocatalysis-atom transfer radical reaction, deep damageto the polyolefin surface is avoided, the reaction temperature can be reduced to room temperature, and grafting time is greatly shortened; moreover, surface functionalization treatment of the polyolefin material is uniform, and corresponding functional groups can be obtained on the surface of the polyolefin material as required.

Description

technical field [0001] The invention belongs to the field of material surface modification, and relates to a method for surface modification of polyolefin materials, in particular to a surface treatment method based on photocatalysis-ATPR grafting technology for polyethylene, polypropylene and their copolymers. Background technique [0002] Polyethylene, polypropylene and their copolymers are important general-purpose thermoplastics, which are widely used because of their good mechanical properties, processability, corrosion resistance and electrical insulation. Thermoplastic polyolefin materials can be easily formed by extrusion, blow molding, injection molding, casting, stretching and other processes to prepare various product forms such as molding materials, pipes, films, fibers, and porous separation membranes. Since polyolefin is composed of inert methylene and methyl groups, and has a certain degree of crystallinity, its surface lacks active groups and has low surface ...

Claims

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Application Information

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IPC IPC(8): C08J7/14C08J7/18C08L23/06C08L23/12C08L23/08D06M10/06D06M10/10D06M101/20
CPCC08J7/14C08J7/18C08J2323/06C08J2323/08C08J2323/12D06M10/06D06M10/10
Inventor 江国栋蒋琳琳姜帅周明柱
Owner 宿迁市南京工业大学新材料研究院
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