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Fluorosilane modified polyether type polyurethane underwater sound transmission material and preparation method thereof

A technology of polyether polyurethane and sound-transmitting material is applied in the field of hydroacoustic materials, which can solve the problems of poor water resistance and water tightness, low comprehensive mechanical properties, low water resistance and surface tension, etc., and achieve hydrophobicity. The effect of improved performance, good chemical stability and strong hydrophobicity

Inactive Publication Date: 2019-06-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of existing polyurethane underwater acoustic materials such as low comprehensive mechanical properties, poor water resistance and water tightness, the purpose of the present invention is to provide a soft segment using polytetrahydrofuran with good hydrolysis resistance as polyurethane, and at the same time introduce Composite modified polyether polyurethane water sound-permeable material obtained by using polytrifluoropropylmethylsiloxane and perfluorodecyltrimethoxysilane as modified materials with strong oil resistance, water resistance and low surface tension. The composite fluorosilane-modified polyether polyurethane underwater acoustic sound-permeable material has strong hydrophobicity, high water resistance, good cold resistance and sound permeability, and can be widely used in underwater acoustic transducers, seabed oil exploration, marine fishing, sonar Potting materials for underwater detection devices such as devices

Method used

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  • Fluorosilane modified polyether type polyurethane underwater sound transmission material and preparation method thereof
  • Fluorosilane modified polyether type polyurethane underwater sound transmission material and preparation method thereof
  • Fluorosilane modified polyether type polyurethane underwater sound transmission material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]1) Add 150g of polytetrahydrofuran diol, 0.096g of perfluorodecyltrimethoxysilane and 9.484g of polytrifluoropropylmethylsiloxane into a three-necked flask equipped with a stirrer and a thermometer, and raise the temperature to 105°C. Dehydrate under vacuum for 1 hour until the tested moisture content is lower than 0.05%, then cool to 40-50°C, add 1 drop of catalyst, slowly add 31.92g of toluene diisocyanate, and slowly heat the system to (80±5)°C after naturally heating up , and the prepolymer was obtained after the insulation reaction.

[0029] 2) After adding 45.48g of reactive diluent, stir for 40min, vacuum defoam for 10min, add 19.70g of chain extender, stir quickly, pour into the mold coated with release agent after vacuum defoaming for 2min, and vulcanize at room temperature for one week.

[0030] The resulting fluorosilicone modified polyether polyurethane has a density of 1089kg / m 3 , the characteristic acoustic impedance is 1.682×10 5 g / (cm 2 ·s), the glass...

Embodiment 2

[0032] 1) Add 150g of polytetrahydrofuran diol, 0.287g of perfluorodecyltrimethoxysilane and 9.293g of polytrifluoropropylmethylsiloxane into a three-necked flask equipped with a stirrer and a thermometer, and raise the temperature to 105°C. Dehydrate under vacuum for 1 hour until the tested moisture content is lower than 0.05%, then cool to 40-50°C, add 1 drop of catalyst, slowly add 31.92g of toluene diisocyanate, and slowly heat the system to (80±5)°C after naturally heating up , and the prepolymer was obtained after the insulation reaction.

[0033] 2) After adding 45.48g of reactive diluent, stir for 40min, vacuum defoam for 10min, add 19.70g of chain extender, stir quickly, pour into the mold coated with release agent after vacuum defoaming for 2min, and vulcanize at room temperature for one week.

[0034] The resulting fluorosilane-modified polyether polyurethane has a density of 1080kg / m 3 , the characteristic acoustic impedance is 1.663×10 5 g / (cm 2 ·s), the glass ...

Embodiment 3

[0036] 1) Add 150g of polytetrahydrofuran diol, 0.479g of perfluorodecyltrimethoxysilane and 9.101g of polytrifluoropropylmethylsiloxane into a three-necked flask equipped with a stirrer and a thermometer, and raise the temperature to 105°C. Dehydrate under vacuum for 1 hour until the tested moisture content is lower than 0.05%, then cool to 40-50°C, add 1 drop of catalyst, slowly add 31.92g of toluene diisocyanate, and slowly heat the system to (80±5)°C after naturally heating up , and the prepolymer was obtained after the insulation reaction.

[0037] 2) After adding 45.48g of reactive diluent, stir for 40min, vacuum defoam for 10min, add 19.70g of chain extender, stir quickly, pour into the mold coated with release agent after vacuum defoaming for 2min, and vulcanize at room temperature for one week.

[0038] The resulting fluorosilane-modified polyether polyurethane has a density of 1085kg / m 3 , the characteristic acoustic impedance is 1.666×10 5 g / (cm 2 s), the glass t...

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Abstract

The invention discloses a fluorosilane modified polyether type polyurethane underwater sound transmission material and a preparation method thereof. The fluorosilane modified polyether polyurethane underwater sound transmission material is prepared from perfluorodecyl trimethoxy silane, polytrifluoropropyl methyl siloxane, polytetrahydrofuran glycol, isocyanate, a chain extender and a reactive diluent through a prepolymer method; and the fluorosilane modified polyether type polyurethane underwater sound transmission material has excellent water resistance, cold resistance and sound transmission performance, and can be widely applied to detection devices such as submarine oil exploration, ocean fishing and ship underwater sonar.

Description

technical field [0001] The present invention relates to an underwater acoustic material, in particular to a kind of strong hydrophobicity obtained by using perfluorodecyltrimethoxysilane and polytrifluoropropylmethylsiloxane as modified materials and polytetrahydrofuran as the soft segment. Fluorosilane-modified polyether polyurethane underwater acoustic sound-permeable material with high water resistance, cold resistance and good sound transmission performance. This material can be used for underwater detection such as underwater acoustic transducers, seabed oil exploration, marine fishing, and sonar devices. The potting material of the device belongs to the technology in the field of underwater acoustic materials. Background technique [0002] The ideal underwater acoustic sound-permeable material can make the sound wave pass through without reflection and loss when it is incident on the sound-transmissive layer. There are two basic requirements in the acoustic design of ...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/83
Inventor 李芝华沈玉婷
Owner CENT SOUTH UNIV
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