A kind of self-healing polyurethane based on boroxane and preparation method thereof

A self-healing, polyurethane technology, applied in the field of material science, can solve problems such as complex synthesis routes and processing methods
CN113563559BActive Publication Date: 2022-06-21SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2022-06-21

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Abstract

The invention discloses a boroxane-based self-healing polyurethane and a preparation method thereof, belonging to the technical field of material science. Firstly, the polyurethane prepolymer with terminal isocyanate group was prepared, and then reacted with Boroxine with different terminal groups under different conditions to prepare self-healing polyurethane based on boroxane. Boroxine, which has a tripod structure and dynamic reversible properties, is introduced into the polyurethane chain as a crosslinking agent to increase the crosslinking density of polyurethane and obtain self-healing polyurethane with better mechanical properties. Combining the advantages of the designability of polyurethane and the controllability of soft and hard segments, the preparation route of the present invention is simple, which reduces the complexity of system design and processing, and is expected to solve the problem of high mechanical strength and good repair performance of polyurethane materials. The contradiction between provides an effective way.
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Description

technical field

[0001] The invention belongs to the technical field of material science, and relates to a self-healing polyurethane based on boroxane and a preparation method thereof. Background technique

[0002] Polyurethane materials are widely used in aerospace, transportation, building materials and construction and many other fields due to their wide variety of raw materials, diverse formulations, strong designability, and many excellent physical and chemical properties. However, in the process of processing, forming and using polyurethane materials, due to the influence of thermal, mechanical and chemical factors, micro-cracks of different degrees will appear inside the material, and these micro-cracks are likely to expand into macro-cracks, resulting in a decrease in the mechanical properties of the material and Reduced service life. Research on high-performance self-healing polyurethane is of great significance to meet the requirements of sustainable development. ...

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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