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Antimicrobial polyurethane composite and preparation method and application thereof

A composite material and polyurethane technology, applied in the field of composite materials, can solve the problems of spreading bacteria, cracks on the surface, poor flexibility, etc., to avoid breeding and spreading, improve antibacterial properties, and ensure non-toxic effects.

Inactive Publication Date: 2017-03-15
国家康复辅具研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the antibacterial polyurethane material prepared by this patent application has good antibacterial performance, there is a technical problem of poor flexibility. When preparing biological medical appliances such as crutches that require a certain support strength and elasticity, it is easy to cause cracks on the surface and affect the crutches. Continuous antibacterial performance and usability
[0005] In order to solve the problem that current medical rehabilitation aids are easy to breed and spread bacteria, causing trouble and harm to users and people around them, and at the same time, when preparing supportive medical rehabilitation aids, it is easy to cause cracks on the surface, which affects its continuous antibacterial performance and use The technical problem of performance, the present invention provides a kind of antibacterial polyurethane composite material and its preparation method and application, for the manufacture of medical rehabilitation aids

Method used

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  • Antimicrobial polyurethane composite and preparation method and application thereof

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preparation example Construction

[0031] The present invention also provides a kind of preparation method of above-mentioned antibacterial polyurethane composite material on the other hand; It is characterized in that, concrete steps are as follows:

[0032] Step 1, preparation of epoxidized polybutadiene prepolymer: first weigh epoxidized polybutadiene, copper acetylacetonate, isocyanate and ethyl acetate in proportion; then add copper acetylacetonate to ethyl acetate Mix until completely dissolved, then add the mixed solution into epoxidized polybutadiene, stir evenly and heat it in a water bath at 65-75°C to obtain a mixed solution; then add isocyanate into the mixed solution, at 65 Stir at ~75°C for 30-40min, with a stirring speed of 100-200r / min, take it out and cool it down to obtain an epoxidized polybutadiene prepolymer;

[0033] Step 2, preparation of modified polyurethane: adding the epoxidized polybutadiene prepolymer into the polyol in proportion, and obtaining the modified polyurethane after mixin...

Embodiment 1

[0037] An antibacterial polyurethane composite material, the polyurethane composite material is composed of the following raw materials: 50 parts by weight of modified polyurethane, 10 parts by weight of composite antibacterial agent, and 10 parts by weight of fiber reinforcement 10 parts by weight of ceramic filler, 10 parts by weight of curing agent, 2 parts by weight of diluent, 5 parts by weight of silane coupling agent, and 5 parts by weight of surfactant 3 parts; the composite antibacterial agent is composed of 60wt% silver-loaded nano-titanium dioxide and 40wt% chitosan; the particle size of the silver-loaded nano-titanium dioxide is 20-180nm, wherein the silver-loaded nano-titanium dioxide The particle size distribution is: 20~50nm accounts for 10~20wt%, 50~80nm accounts for 30~40wt%, 80~120nm accounts for 30~40wt%, 120~180nm accounts for 10~20wt%; The particle diameter of described chitosan 200nm to 300nm.

Embodiment 2

[0039] An antibacterial polyurethane composite material, the polyurethane composite material is composed of the following raw materials: 70 parts by weight of modified polyurethane, 5 parts by weight of composite antibacterial agent, and 5 parts by weight of fiber reinforcement , the parts by weight of the ceramic filler are 5 parts, the parts by weight of the curing agent are 10 parts, the parts by weight of the diluent are 5 parts, the parts by weight of the silane coupling agent are 5 parts, the parts by weight of the surfactant It is composed of 5 parts; the composite antibacterial agent is composed of 55wt% silver-loaded nano-titanium dioxide and 45wt% chitosan; the particle size of the silver-loaded nano-titanium dioxide is 20-180nm, distributed in chitosan capsules , the particle diameter of the chitosan capsule is 0.25-0.76 μm.

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Abstract

The invention provides an antimicrobial polyurethane composite and a preparation method and application thereof. The polyurethane composite is prepared from, by weight, 50-70 parts of modified polyurethane, 5-10 parts of composite antimicrobial agent, 5-10 parts of fiber reinforcement, 5-10 parts of ceramic filler, 10-15 parts of curing agent, 2-5 parts of diluent, 2-5 parts of silane coupling agent and 2-5 parts of surfactant. The composite antimicrobial agent is formed by compounding silver-loaded nanometer titania and chitosan. Modified polyurethane is prepared from polyhydric alcohol and epoxidized polybutadiene prepolymer. The epoxidized polybutadiene prepolymer is composed of epoxidized polybutadiene, copper acetylacetonate, isocyanate and ethyl acetate. The composition and ratio of the antimicrobial polyurethane composite are optimized, and the mechanical strength and flexibility of an antimicrobial polyurethane composite product are considered; meanwhile the antimicrobial performance of the antimicrobial polyurethane composite is greatly improved, breeding and propagating of bacteria can be effectively avoided, and healthy and comfortable experience is brought to a user.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an antibacterial polyurethane composite material and its preparation method and application. The antibacterial polyurethane composite material is used to manufacture medical rehabilitation aids. Background technique [0002] With the improvement of living standards, people have begun to pay more attention to the ways and new materials to prevent the spread of bacteria, especially medical rehabilitation aids for the elderly and patients, which need to have the ability to prevent the spread of bacteria. The elderly and patients are relatively weak in body resistance and are more susceptible to the intrusion of bacteria and viruses in the natural environment. Due to the high frequency of use and the influence of the use environment, medical rehabilitation aids are particularly easy to breed and spread bacteria. causing distress and harm to those around them. ...

Claims

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Application Information

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IPC IPC(8): C08L75/14C08L75/04C08L5/08C08K13/06C08K9/12C08K9/10C08K3/08C08K3/22C08K7/04C08K7/14C08K3/34C08G18/69C08G18/58C08G18/42C08G18/48C08G18/10
CPCC08L75/14C08G18/10C08G18/4018C08G18/4045C08G18/42C08G18/48C08G18/58C08G18/698C08K2201/003C08K2201/011C08K2201/014C08L75/04C08L2201/08C08L5/08C08K13/06C08K9/12C08K9/10C08K2003/0806C08K2003/2241C08K7/04C08K7/14C08K3/34C08K3/346C08G18/40
Inventor 郭琳李立峰王喜太樊瑜波
Owner 国家康复辅具研究中心
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