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Graphene waterborne polyurethane based sponge modification method

A polyurethane sponge, alkene water-based technology, applied in coatings and other directions, can solve the problems of insensitivity, inability to maintain high sensitivity and wide measurement range at the same time

Pending Publication Date: 2020-04-17
CHANGZHOU SHUNXIANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the use of piezoelectric materials to convert mechanical energy in the environment into electrical energy has attracted more and more attention. The piezoresistive sensing materials with high sensitivity and large deformation range have been the focus of research in recent years. The current sensor Most materials cannot maintain the two important characteristics of high sensitivity and wide measurement range at the same time. For example, conductive polymer materials have good variability, but they are not sensitive under small deformation and low pressure.

Method used

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  • Graphene waterborne polyurethane based sponge modification method
  • Graphene waterborne polyurethane based sponge modification method
  • Graphene waterborne polyurethane based sponge modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Graphene oxide 15g prepared by the Hummers method is mixed with deionized water 1500g and ultrasonically dispersed fully to obtain a graphene oxide dispersion,

[0030] Add 70g of polyetheramine D-230 to the above graphene oxide dispersion and stir (stirring speed is 100 rpm) to fully disperse, then raise the temperature to 60°C (oil bath heating) and react for 20 Hour,

[0031] Filter and wash until the filtered cleaning solution is neutral (pH is 7), and the filter cake obtained by filtering is redispersed in 1800g deionized water to obtain a dispersion of modified graphene oxide;

[0032] (2) Add 2.2 g of dibutyltin dilaurate to 457 g of isophorone diisocyanate IPDI, and dropwise add 616 g of polyethylene glycol 400 therein, drop it in 4 hours, and heat up under stirring at 280 rpm After reacting at 50°C (oil bath heating) for 1 hour, add 36g of 1,2-dihydroxy-3-propanesulfonate sodium to it, and keep the aforementioned stirring state and 50°C (oil bath heating) ...

Embodiment 2

[0039] (1) with the step (1) of embodiment 1;

[0040] (2) Add 2.4 g of dibutyltin dilaurate to 346 g of hexamethylene diisocyanate HDI, and dropwise add 965 g of polyethylene glycol 600 therein, drop it in 4.5 hours, and heat up under stirring at 300 rpm After reacting at 50°C (oil bath heating) for 1.5 hours, add 40g of sodium 1,2-dihydroxy-3-propanesulfonate to it, and keep the aforementioned stirring state and 50°C (oil bath heating) to continue the reaction After 5 hours, the resulting reaction system mixture was divided into two on average, each part was 673.4g, and all of them were added dropwise to the dispersion of modified graphene oxide obtained in step (1), and the mixture was dropped in 2 hours. Finished, 700 rev / min stirred and mixed to obtain the water-based polyurethane emulsion grafted with graphene after 2 hours;

[0041](3) Put the cuboid polyurethane sponge block of the same material as in Example 1, which is 6cm long from left to right x 1cm wide from fro...

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Abstract

The invention belongs to the technical field of preparation of polyurethane sponge materials, and in particular, relates to a graphene waterborne polyurethane based sponge modification method. The preparation method comprises the steps: firstly, carrying out mixing reaction of a diisocyanate compound, polyol and a hydrophilic monomer to a certain degree; adding the obtained reaction system into adispersion liquid of amine modifier modified graphene oxide, carrying out mixing reaction fully to obtain waterborne polyurethane emulsion grafted with graphene, putting polyurethane sponge into the emulsion, infiltrating and diffusing the polyurethane sponge by the emulsion, and drying to obtain the graphene waterborne polyurethane modified sponge.

Description

technical field [0001] The invention belongs to the technical field of preparation of polyurethane sponge materials, in particular to a method for modifying sponges based on graphene water-based polyurethane. Background technique [0002] In recent years, the use of piezoelectric materials to convert mechanical energy in the environment into electrical energy has attracted more and more attention. The piezoresistive sensing materials with high sensitivity and large deformation range have been the focus of research in recent years. The current sensor Most materials cannot maintain the two important characteristics of high sensitivity and wide measurement range at the same time. For example, conductive polymer materials have good variability, but they are not sensitive under small deformation and low pressure. Therefore, the direction of research in this field is more and more towards the direction of organically combining electrically variable materials and elastic materials....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/42C08J9/36C08G18/32C08G18/08C08L75/04
CPCC08G18/08C08G18/3206C08G18/3855C08J9/36C08J9/42C08J2375/04
Inventor 王家选顾飚胡伟波董卫龙赵彦冰
Owner CHANGZHOU SHUNXIANG NEW MATERIAL TECH CO LTD
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