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Preparation of chitosan-polyurethane ion complex elastomer material

A technology of elastomer material and chitosan, which is applied in the field of preparation of chitosan-polyurethane ion composite elastomer material, can solve the problem of single function of chitosan and polyurethane composite material, not much room for modification and improvement, The preparation process is not flexible enough to achieve the effect of simple preparation method, few steps, and flexible molecular design

Inactive Publication Date: 2009-08-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The function of the chitosan and polyurethane composite material prepared by the above method is single, the application field is small, and the range of raw materials is narrow
Chinese patent ZL200610040330.9 introduces the invention of using chitosan as a chain extender to prepare chitosan and polyurethane block copolymer elastomer materials. The comprehensive performance of sugar and polyurethane composite materials has been greatly improved, and the application range is wider, but the preparation process is still not flexible enough, and there is not much room for further modification and improvement

Method used

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  • Preparation of chitosan-polyurethane ion complex elastomer material
  • Preparation of chitosan-polyurethane ion complex elastomer material
  • Preparation of chitosan-polyurethane ion complex elastomer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 10g of polytetrahydrofuran diol (Mn=1000) and 6.66g of isophorone diisocyanate successively in the three-necked flask, pass argon, stir mechanically, react at 75°C-85°C for 3 hours, then add 1.34g of diisocyanate Methylolpropionic acid, continue to react for 2 hours. Cool down, add 25ml of acetone to infiltrate, stir for 20 minutes, then add 1.01g of triethylamine and react for 20 minutes to obtain a colorless and transparent solution, that is, an acetone solution of polyurethane prepolymer. Stir mechanically, at room temperature, slowly drop 50ml of distilled water into the acetone solution of the polyurethane prepolymer, and react for 1 hour to obtain a stable colorless polyurethane microemulsion. The microemulsion was placed at room temperature for twelve months without precipitation.

Embodiment 2

[0046] Add 30g of amino silicone oil (Mn=3000), 5.22g of toluene diisocyanate, 30ml of tetrahydrofuran in sequence in the three-necked flask, pass argon, stir mechanically, react at 80°C-90°C for 2 hours, then add 1.50g of tartaric acid, continue React for 1 hour, lower the temperature and add 30ml of tetrahydrofuran for infiltration, stir for 30 minutes, then add 2.06g of diethyltriamine and react for 1 hour to obtain a colorless and transparent solution, that is, a solution of polyurethane prepolymer in tetrahydrofuran. With mechanical stirring and an oil bath at 20°C, slowly drop 100ml of distilled water into the tetrahydrofuran solution of the polyurethane prepolymer, and react for 36 hours to obtain a stable colorless polyurethane emulsion. The emulsion was stored at room temperature for twelve months without precipitation.

Embodiment 3

[0048] Add 200g of polyethylene oxide glycol (Mn=20000), 5.36g of terephthalylene diisocyanate successively in the three-necked flask, blow nitrogen, stir mechanically, react at 50°C-60°C for 6 hours, then add 1.63 g N, N-bishydroxyethylglycine, continue to react for 4 hours. Cool down, add 100ml DMSO for infiltration, stir for 30 minutes, then add 0.59g trimethylamine and react for 30 minutes to obtain a colorless and transparent solution, that is, a DMSO solution of polyurethane prepolymer. Mechanical stirring, oil bath 89 ° C, the DMSO solution of the polyurethane prepolymer was slowly dropped into 100ml of distilled water, and reacted for 10 minutes to obtain a stable colorless polyurethane microemulsion. The microemulsion was placed at room temperature for twelve months without precipitation.

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Abstract

The invention discloses a preparation method of chitosan-polyurethane ionic compound elastomeric material, which comprises the following steps: polyisocyanates reacts with polymer polylol and then reacts with diol or diamine, organic solvent and ionization reagent are added in the reactants to react with water for generating anionic waterborne polyurethane and further performs the ionic recombination reaction with cationic chitosan water solution to obtain the microemulsion or latex of chitosan-polyurethane ion composite, and finally the microemulsion or latex of chitosan-polyurethane ion composite is dried and solidified to obtain the chitosan-polyurethane ionic compoundelastomeric material. The chitosan-polyurethane ionic compoundelastomeric material has the advantages of good mechanical property, easy processing, good oil-water resistance property, good cohesive property with parent metal, controllable performance, good biocompatibility, biodegradable property, high biological activity, good blood contact property, good bacteriostatic property, good antibacterial property, and the like, can be applied in fields of mechanical industry, building industry, sport, medical treatment, and the like, and especially has wider purpose in aspects of life science research, medical materials and medical appliances.

Description

technical field [0001] The invention relates to a preparation method of an elastic body material, in particular to a preparation method of a chitosan-polyurethane ion complex elastic body material. Background technique [0002] Polyurethane (PU) elastomers are composed of polyisocyanates, polymer polyols, different chain extenders, diols or diamines, and different vulcanizing agents, fillers and additives. [0003] Polyurethane is a kind of polymer material with excellent comprehensive performance, good wear resistance, wide range of hardness, high strength and elongation, large load support capacity, good shock absorption effect, excellent oil resistance, biocompatibility, molding process Good performance and controllable performance, so polyurethane ranks first among natural materials and synthetic materials. In addition to being widely used in wear resistance, oil resistance, shock absorption and high load capacity, it is also widely used in artificial hearts and artifici...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G18/12C08G18/65C08G18/72
Inventor 贾叙东徐丹孟震袭锴张秋红衡亮薛春彦王伟娜李维智余学海
Owner NANJING UNIV
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