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Preparation method of waterproof and ventilated polyurethane thin film

A polyurethane film, waterproof and breathable technology, applied in the field of polymer materials, can solve the problems of poor air permeability and hydrophobic performance, and achieve the effect of improving air permeability and hydrophobicity

Inactive Publication Date: 2019-01-18
徐冬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: aiming at the problem of poor air permeability and hydrophobic performance of traditional polyurethane films, a preparation method of waterproof and breathable polyurethane films is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022]Mix graphene oxide and water at a mass ratio of 1:120, and ultrasonically disperse at a frequency of 55 kHz for 60 minutes to obtain a graphene oxide dispersion; mix ethanol and water at a volume ratio of 2.0:1.0 in a beaker, and Add dodecylamine 0.3 times the volume of ethanol into the beaker, stir and mix for 60 minutes at a temperature of 65°C and a rotation speed of 450r / min to obtain a mixed solution of ethanol. : 8 mixing, controlling the addition rate of tetraethyl orthosilicate to be 10mL / min, and stirring and hydrolyzing for 5 hours at a temperature of 45°C and a rotating speed of 350r / min, and then filtering to obtain a filter cake, which was heated at a temperature of 85 After drying at ℃ for 5 hours, calcined to obtain pretreated silica, mixed pretreated silica and paraffin in a ball mill at a mass ratio of 1:5, and mixed ball milled for 60 minutes to obtain modified silica; The graphene dispersion liquid and the graphene microplates are mixed at a mass ratio...

example 2

[0024] Mix graphene oxide and water at a mass ratio of 1:120, and ultrasonically disperse at a frequency of 55 kHz for 60 minutes to obtain a graphene oxide dispersion; mix the graphene oxide dispersion and graphene microchips at a mass ratio of 100:8 Mixing, after ultrasonic dispersion under the condition of 60kHz for 50min, the pretreated graphene mixture blank is obtained, and the pretreated graphene mixture blank is hydrothermally treated for 4h under the condition of 180° C., the pretreated graphene mixture is obtained, and the pretreated graphene mixture is obtained. After processing the graphene mixture, dry it at a temperature of 75°C for 3 hours, and then crush it through a 100-mesh sieve to obtain a graphene mixture; mix the graphene mixture with an alcohol solvent at a mass ratio of 1:40, and vacuum at a temperature of 75°C After the pressure holding treatment for 7 hours, the modified graphene mixture blank was obtained, and the modified graphene mixture blank was l...

example 3

[0026] Mix graphene oxide and water at a mass ratio of 1:120, and ultrasonically disperse at a frequency of 55 kHz for 60 minutes to obtain a graphene oxide dispersion; mix ethanol and water at a volume ratio of 2.0:1.0 in a beaker, and Add dodecylamine 0.3 times the volume of ethanol into the beaker, stir and mix for 60 minutes at a temperature of 65°C and a rotation speed of 450r / min to obtain a mixed solution of ethanol. : 8 mixing, controlling the addition rate of tetraethyl orthosilicate to be 10mL / min, and stirring and hydrolyzing for 5 hours at a temperature of 45°C and a rotating speed of 350r / min, and then filtering to obtain a filter cake, which was heated at a temperature of 85 After drying at ℃ for 5 hours, calcined to obtain modified silica; mix graphene oxide dispersion liquid and graphene microsheets at a mass ratio of 100:8, and ultrasonically disperse them at a frequency of 60kHz for 50 minutes to obtain the modified silica. Treating the graphene mixture blank...

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Abstract

The invention discloses a preparation method of a waterproof and ventilated polyurethane thin film and belongs to the technical field of high molecular materials. The preparation method disclosed by the invention comprises the following steps: weighing the following components in sequence in parts by weight: 60 to 70 parts of polyurethane, 10 to 15 parts of polyethylene glycol, 12 to 18 parts of modified silicon dioxide, 18 to 20 parts of a modified graphene mixture, 3 to 5 parts of diethyl phthalate, 5 to 8 parts of epoxidized soybean oil, 3 to 8 parts of a silane coupling agent, 10 to 15 parts of acetone and 15 to 18 parts of N,N-dimethylformamide; mixing the polyurethane and the N,N-dimethylformamide; adding the acetone; after stirring and mixing, obtaining a blank solution; mixing theblank solution and the modified silicon dioxide; adding the modified graphene mixture, the diethyl phthalate, the epoxidized soybean oil and the silane coupling agent; after stirring and mixing, obtaining a film forming solution; coating the film forming solution into a polytetrafluoroethylene mold; heating, curing and molding; and uncovering the film to obtain the waterproof and ventilated polyurethane thin film. The waterproof and ventilated polyurethane thin film provided by the invention has excellent ventilation performance and hydrophobic performance.

Description

technical field [0001] The invention discloses a preparation method of a waterproof and breathable polyurethane film, which belongs to the technical field of polymer materials. Background technique [0002] Polyurethane is an important class of polymer materials, and its chemical synthesis is mainly carried out through the polyaddition reaction of diisocyanate and diol. The structural design and synthesis of polymers are not only the basis of polymer chemistry, but also gradually extended to materials science, molecular catalysis, biomedicine and other fields. Therefore, exploring polyurethane synthesis methods and developing new polyurethane materials has important theoretical significance and potential application value. [0003] With the increasing emphasis on coating safety and environmental protection indicators, waterborne polyurethane is gradually accepted by the market due to its low hazard and low pollution characteristics. The dispersion medium of water-based pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L71/02C08L91/00C08K13/06C08K9/04C08K3/36C08K3/04C08K5/12C08J5/18
CPCC08J5/18C08J2375/04C08J2471/02C08J2491/00C08K3/042C08K3/36C08K5/12C08K9/04C08K13/06
Inventor 徐冬刘侠朱东东
Owner 徐冬
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