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Process for producing material with equivalent heat-transfer performance of human body skin

A technology of human skin and equivalent materials, applied in the field of preparation of effective materials, can solve the problems of chitosan and polyurethane composite materials with single function, complex operation process, and narrow raw material range, and achieve simple preparation process, high biological activity, Environmentally friendly effect

Inactive Publication Date: 2009-04-08
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The chitosan and polyurethane composite material prepared by the above method has a single function, a small application field, and a narrow range of raw materials
Modified polyurethane with chitosan is also reported, such as disclosed in Chinese patent CN1869094A, but its operation process is complicated, and toxic substances such as acetone are introduced in the preparation process

Method used

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  • Process for producing material with equivalent heat-transfer performance of human body skin
  • Process for producing material with equivalent heat-transfer performance of human body skin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 9.063g terephthalylene diisocyanate (MDI) prepolymer (free isocyanate content (-NCO%) in the diisocyanate prepolymer is 20%) and 4.023g liquid polypropylene oxide successively in three-necked bottle, its Average molecular weight is 2000, at 80 ℃, high-speed stirring, constant temperature reaction 2.5 hours, obtain polyurethane pre-elastic polymer; Add 10g chitosan powder in this pre-polymer, amorphous form, degree of deacetylation ≥ 90.0%, pH ( 10g / L, 25℃) 7.0~8.0, viscosity 50~800mPa·s, heavy metal≤0.0015%, loss on drying≤10.0%, arsenic<0.00006%, residue on ignition≤1.5%, insoluble matter≤1.0%, high-speed strong stirring Dissolve it to obtain a viscous liquid without precipitation. After reacting at 80°C for 2 hours, cool the solution to 50°C, add 0.05g of triethylenetetramine for cross-linking, and add 0.23g of heat-sensitive material superconducting Carbon black and 0.4g of nano-hydrotalcite flame retardant were poured into a mold for solidification and defoaming...

Embodiment 2

[0029] 2.884g 4,4'-dicyclohexylmethane diisocyanate (H12MDI) prepolymer (free isocyanate content (-NCO%) in the diisocyanate prepolymer is 23%) and 7.779g liquid polycyclic Propylene oxide, the average molecular weight of which is 2000, was stirred at 80°C at high speed and reacted at a constant temperature for 2.5 hours to obtain a polyurethane prepolymer; 10 g of chitosan powder was added to the prepolymer, stirred at a high speed and vigorously to dissolve it to obtain a viscous , Liquid without precipitation; 90°C constant temperature cross-linking and curing reaction for 2 hours, the solution was cooled to 50°C, 0.5g of triethylenetetramine was added to the reaction system, and 0.325g of multi-armed carbon nanotubes were added as a thermosensitive material and 0.76g of nanometer hydrotalcite as a flame retardant, poured into a mold for solidification and defoaming for 24 hours, to obtain chitosan-based polyurethane elastomer human skin equivalent material. This sample is ...

Embodiment 3

[0032]Add 6.681g hexamethylene diisocyanate (HDI) prepolymer (free isocyanate content (-NCO%) in the diisocyanate prepolymer is 80%) and 3.717g polypropylene oxide successively in three-necked bottle, at 80 Stir at high speed at ℃ and react at constant temperature for 2.5 hours to obtain a polyurethane prepolymer; add 10 g of chitosan powder to the prepolymer, stir at a high speed and vigorously to dissolve it, and obtain a viscous liquid without precipitation; constant temperature at 60°C Cross-linking and curing reaction for 2 hours, lower the temperature of the solution to 50°C, add 0.23g of ethylenediamine to the reaction system, and at the same time add 0.2g of carbon fiber with a length of 2-6mm as a heat-sensitive material and 0.4g of nano-SiO 2 The flame retardant is poured into the mold for solidification and defoaming for 24 hours to obtain the equivalent material of chitosan-based polyurethane elastomer human skin. This sample is marked 11#.

[0033] Thermal perfor...

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Abstract

The invention relates to a method for preparing a chitosan based polyurethane elastomer human skin equivalent material. The method comprises the following steps: (1) a diisocyanate prepolymer and polypropylene oxide are stirred at the temperature of 80 DEG C and at a high speed and a polyurethane prepolymer is obtained after 2.5 hours of isothermal reaction; (2) chitosan is added and stirred at a high speed forcefully to cause the chitosan to dissolve so as to obtain a thick liquid without precipitates precipitated; and (3) after 2 hours of reaction at the temperature of 80 DEG C, the liquid is cooled to 50 DEG C, multi-amine, a heat-sensitive material and a flame retardant are added, the mixture is poured into a die to be cured and deaerated for 24 hours so as to obtain the chitosan based polyurethane elastomer human skin equivalent material. The bulk polymerization method adopted by the invention has simple preparation technique, and is high efficient, nontoxic and environmentally friendly and the equivalent material prepared has thermal properties close to that of real skin tissue, can be easy to process, is biodegradable, has good biocompatibility, high biological activity, good high temperature, oil and water resistance, controllable performance and other excellent performance, can be widely applied to fields such as human simulation model, automobile, aerospace relevant performance testing and the like.

Description

technical field [0001] The present invention relates to a preparation method of equivalent material of human skin heat transfer performance, in particular to a preparation method of equivalent material of human skin heat transfer performance prepared by chitosan-based polyurethane elastomer, human skin prepared by the method Equivalent materials with heat transfer performance can be used in human body heat transfer simulation models, biomedical engineering and automotive, aerospace-related performance tests and other fields. Background technique [0002] Polyurethane (PU) elastomer is a kind of polymer material with excellent comprehensive performance, good wear resistance, wide hardness range, high strength and elongation, large load support capacity, good shock absorption effect, excellent oil resistance, biophase Capacitive, biodegradable, good processing performance and controllable performance, non-toxic, no "three effects" effect, it is widely used in the research of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/65C08G18/64C08G18/48C08G18/10C08L75/04C08K3/04C08K7/06C08K7/24C08K3/22C08K3/34C08K3/36
Inventor 谌玉红蒋毅倪济云李晨明
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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