Polypropylene modified functional film and preparation method thereof

Abstract

The invention discloses a polypropylene modified functional film and a preparation method thereof. The preparation method of the polypropylene modified functional film comprises the following steps of: (1) immersing a cleaned polypropylene film in a toluene solution of benzophenone bromoisobutyrate, and airing; and putting the product into a transparent quartz vessel, introducing nitrogen and irradiating with an ultraviolet lamp; (2) extracting with dichloromethane and drying to obtain a polypropylene film with a brominated (-Br) surface; (3) putting the product into a colorimetric tube containing a reaction solvent, adding methacrylic acid or a methacrylate monomer, introducing nitrogen, and adding a visible light initiator tris(2-phenylpyridine) iridium; (4) sealing the colorimetric tube, and performing an irradiation reaction under the light of a fluorescent lamp at normal temperature; and (5) cleaning with deionized water, and washing N,N-dimethylformamide or N,N-dimethylacetamide with pure water; and taking out the product and drying to obtain the polypropylene modified functional film. The preparation method disclosed by the invention improves the hydrophilicity and dirt resistance of the film, has a simple process, and is green and environment-friendly and suitable for industrial production.

Description

technical field [0001] The invention relates to a method for modifying and functionalizing the surface of a polypropylene film with full light control. Background technique [0002] In the 21st century, separation membranes will be widely used in bionic medicine fields such as water pollution treatment, anti-protein adsorption and blood compatibility. Due to the characteristics of high efficiency, environmental protection, energy saving, simple process and automatic control, membrane separation technology has broad prospects in the above fields. Separation membrane is the core of membrane technology, and its chemical properties and structure play a decisive role in the performance of membrane separation. Polypropylene (PP) has the advantages of excellent chemical stability, radiation resistance, heat resistance, aging resistance and easy film formation. , Biochemical and other industries. However, due to the low surface energy and strong hydrophobicity of PP, surface adso...

AI Technical Summary

Problems solved by technology

The PP film has good chemical resistance, and the reagents in the surface chemical treatment and modification are difficult to react to the bulk, and the mechanical strength of the modified film will not affect the bulk properties; the composite modified surface coating is easy to fall off ; The primary problem of surface chemical grafting modification is how to realize the controllable growth of chains; Irradiation modification uses high-energy rays or ions to irradiate in the membrane surface reaction, which not only produces free radicals and monomer polymerization, but also high-energy rays can also destroy Mechanical properties of the membrane body

In many cases, people use high-energy radiation to graft and modify the membrane, which not only damages the mechanical strength of the membrane itself, but also easily undergoes self-polymerization reaction.

In addition, atom transfer radical polymerization (ATRP) is widely used in the field of membrane grafting, but due to the high requirements of the reaction process, there are strict requirements on the activity of the ligand and the amount of the catalyst, high energy consumption and complicated operation.

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