Flame retardant polyurethane sponge, preparation method and application thereof

A polyurethane sponge and sponge technology, which is applied in the field of material modification, can solve the problems of damaging the mechanical properties of polymers, the flame retardancy of materials has not yet been found, and the inability to achieve self-extinguishing, so as to improve mechanical strength, reduce mass/energy transfer, low cost effect

Active Publication Date: 2019-04-19
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Higher halloysite content, due to its poor interface with the polymer, will impair the mechanical properties of the polymer and cannot be self-extinguishing
So far, no literature and patent reports have been found to improve the flame retardancy of materials by simply coating the surface on the polymer surface

Method used

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  • Flame retardant polyurethane sponge, preparation method and application thereof
  • Flame retardant polyurethane sponge, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Cut the commercial polyurethane sponge into a size of 2.5cm×2.5cm×2.5cm, wash it with acetone under ultrasonic conditions for 20min, volatilize in the air for 6h until the solvent is completely evaporated, then wash it with deionized water for 5min, and place it in an oven at 50°C Dry for 120min;

[0039] (2) Weigh 1g of halloysite nanotubes (length 200-500nm, outer diameter 50-60nm, inner diameter 10-20nm, origin Shanxi) in 100mL deionized water, ultrasonically disperse for 30min to obtain halloysite nanotube water Dispersions;

[0040] (3) Soak the sponge completely in the halloysite nanotube aqueous dispersion, squeeze the sponge 5 times by hand until no bubbles are produced in the sponge, and stir for 60 minutes (rotating speed 200 rpm) until the sponge absorbs enough dispersion;

[0041] (4) Take out the sponge, place it in an oven at 80°C, dry it for 4 hours, and turn the sponge over by hand every half an hour to avoid the uneven coating thickness of the hall...

Embodiment 2

[0045] (1) Cut the commercial polyurethane sponge into a size of 10cm×10cm×3cm, wash it with ethanol under ultrasonic conditions for 30 minutes, volatilize it in the air for 4 hours until the solvent evaporates completely, then wash it with deionized water for 10 minutes, and dry it in an oven at 60°C for 150 minutes;

[0046] (2) Weigh 5g of halloysite nanotubes (500-1000nm, 60-70nm in outer diameter, 20-30nm in inner diameter, produced in Hunan) in 100mL of deionized water, stir and disperse for 60min to obtain water dispersion of halloysite nanotubes liquid;

[0047] (3) Soak the sponge completely in the halloysite nanotube aqueous dispersion, squeeze the sponge 6 times with tweezers until no bubbles are produced when squeezing the sponge, and ultrasonicate for 120min (1000W) until the sponge absorbs enough dispersion;

[0048] (4) Take out the sponge, place it in an oven at 100°C, dry it for 3 hours, and turn the sponge over every 5 minutes by hand to avoid the uneven coat...

Embodiment 3

[0052] (1) Cut the commercial polyurethane sponge into a size of 20cm×20cm×5cm, wash it with ethanol under ultrasonic conditions for 40min, volatilize in the air for 6h until the solvent evaporates completely, then wash it with deionized water for 15min, and dry it in an oven at 50°C for 180min;

[0053] (2) Weigh 4g of halloysite nanotubes (300-800nm ​​in length, 70-80nm in outer diameter, 10-20nm in inner diameter, produced in Hunan) in 100mL deionized water, stir and disperse for 120min to obtain halloysite nanotube water Dispersions;

[0054] (3) Soak all the sponge in the halloysite nanotube aqueous dispersion, squeeze the sponge 5 times with tweezers until no bubbles are produced in the sponge, and stir for 150min (rotating speed 400rpm) until the sponge absorbs enough dispersion;

[0055] (4) Take out the sponge, place it in an oven at 90°C, dry it for 6 hours, and turn the sponge mechanically every 10 minutes to avoid the uneven coating thickness of the halloysite nano...

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Abstract

The invention discloses a flame retardant polyurethane sponge, a preparation method and application thereof. The method includes the specific steps of: soaking polyurethane sponge in a halloysite nanotube aqueous dispersion, extruding the polyurethane sponge with effort, and conducting stirring or ultrasonic treatment to coat halloysite nanotubes uniformly on the polyurethane sponge; placing the polyurethane sponge in drying equipment, and turning over the sponge once at set intervals; after gradual evaporation of the liquid, removing the halloysite nanotubes that are not firmly combined, thusobtaining the halloysite nanotube coated modified flame retardant polyurethane sponge. The preparation method provided by the invention uses water as the dispersing medium, is free of environmental pollution, and has no need for a complicated layer-by-layer assembly process. The method is carried out at room temperature, has the characteristics of simple operation, good repeatability, no involvement of chemical process, low cost and no use of organic solvent, also can self-extinguishing flame retardance of polyurethane sponge, and the combustion process is free of smoke and dripping.

Description

technical field [0001] The invention belongs to the technical field of material modification, and relates to a technology for improving the flame retardancy of polyurethane sponge by surface coating of nanometer materials, in particular to a flame-retardant polyurethane sponge and its preparation method and application. Background technique [0002] Polyurethane sponges mostly have an open-cell structure, which has the advantages of low density, good air permeability, aging resistance, good resilience, good stability, resistance to organic solvents, breathability, sound insulation, and heat preservation. It is widely used as furniture cushions, car seat cushions, and thermal insulation building materials. and various upholstery laminated composites. In addition, polyurethane sponge can also be used as filter material, sound insulation material, shockproof material, decoration material, and packaging material. However, ordinary polyurethane sponge has poor flame retardancy an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08L75/04C08K7/26
CPCC08J9/40C08J2375/04C08K7/26
Inventor 刘明贤吴帆
Owner JINAN UNIVERSITY
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