A kind of modified polypropylene composite fiber and preparation method thereof

A polypropylene fiber and composite fiber technology, applied in the field of materials, can solve problems such as weak bonding ability, achieve the effects of improving bonding, improving compactness, and regulating flexural performance
CN107558182BActive Publication Date: 2019-11-15中建西部建设新疆有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中建西部建设新疆有限公司
Publication Date
2019-11-15

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Abstract

The invention relates to the field of materials, in particular to modified polypropylene composite fibers and a preparation method thereof. The preparation method comprises the following steps: carrying out reaction on 1-2wt% of polypropylene fiber aqueous solution, diisocyanate and an oxidizing agent for 50-70 minutes at the temperature of 50-60 DEG C, heating to 90-100 DEG C, and reacting with an initiator for 1-2 hours, so that the modified polypropylene fibers are obtained. A mixed solution of of a graphene oxide aqueous solution and modified polypropylene fibers react for 1-2 hours at thetemperature of 50-60 DEG C, and then washing and drying are carried out. Diisocyanate and the oxidizing agent oxidize the polypropylene fibers, activity of the polypropylene fibers is enhanced, the modified polypropylene fibers are grafted with graphene oxide, and high-activity carbon-oxygen double bonds are connected with hydroxyls and carboxyls on the surface of graphene oxide. When the modified polypropylene composite fibers are doped into a cement-based material, toughness of concrete is improved from macroscopical and microcosmic double levels, and adhesion between the cement and the fibers is also beneficially improved.
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Description

technical field

[0001] The invention relates to the field of materials, in particular to a modified polypropylene composite fiber and a preparation method thereof. Background technique

[0002] Polypropylene fiber is a common organic fiber. When polypropylene fiber is mixed into cement-based materials, due to its good toughness, it can improve the tensile, flexural and shear properties of cement-based materials to a certain extent. But because the bonding ability of polypropylene fiber and cement-based materials becomes poor.

[0003] Accordingly, the inventors have invented a method for modifying polypropylene fibers. Contents of the invention

[0004] The purpose of the present invention is to provide a modified polypropylene composite fiber and its preparation method, which aims to improve the existing problem of weak bonding ability between polypropylene fiber and other materials.

[0005] The invention provides a technical solution:

[0006] A preparation method of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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