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Impact-resistant shear thickening polyurethane hydrogel and preparation method thereof

A technology of polyurethane and hydrogel, which is applied in the field of impact-resistant shear thickening polyurethane hydrogel and its preparation, and can solve problems such as short response time

Active Publication Date: 2020-05-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increase in viscosity usually reaches several orders of magnitude, and the response time is very short (on the order of milliseconds)

Method used

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  • Impact-resistant shear thickening polyurethane hydrogel and preparation method thereof
  • Impact-resistant shear thickening polyurethane hydrogel and preparation method thereof
  • Impact-resistant shear thickening polyurethane hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) Weigh 70-95% PEG into a round-bottomed flask, and fully remove water by rotary evaporation in a vacuum oil bath. Add the above-mentioned PEG and 3-25% DBTDL into the three-necked flask, vacuumize and ventilate with N 2 Protect, heat in an oil bath and stir with magnetic force to make it fully melt, add 0.5-1% IPDI and 1.5-4% stannous octoate into the flask, react for a certain period of time and cool down to obtain PU.

[0055] 2) Add 4ml of AOI into the round bottom flask, stir it with magnetic force, and get the reaction product (PU-AOI) after reacting for a certain period of time, precipitate with anhydrous ether, wash thoroughly and dry in vacuum.

[0056] 3) Weigh 60-95% (PU-AOI), 4-39% ABCN into the three-necked flask, vacuum and ventilate 2 For protection, add a certain amount of steamed anhydrous toluene, stir magnetically to make it fully dissolved, add 1% MPTDMS to the flask, stir magnetically in an oil bath, and react for a certain period of time to obtai...

Embodiment 2

[0067] 1) Weigh 70-95% PEG into a round-bottomed flask, and fully remove water by rotary evaporation in a vacuum oil bath. Add the above-mentioned PEG and 3-25% DBTDL into the three-necked flask, vacuumize and ventilate with N 2 Protection, heating with oil bath and magnetic stirring to make it fully melt, add 0.5-1% IPDI, 1.5-4% stannous octoate into the flask, react for a certain period of time and cool down to obtain PU;

[0068] 2) Add 8ml of AOI to the flask, stir with magnetic force, and react for a certain period of time to obtain the reaction product (PU-AOI), which is precipitated with anhydrous ether, fully washed and vacuum-dried.

[0069] 3) Weigh 60-95% (PU-AOI), 4-39% ABCN into the three-necked flask, vacuum and ventilate 2 For protection, add a certain amount of steamed anhydrous toluene, stir magnetically to make it fully dissolved, add 1% MPTDMS to the flask, stir magnetically in an oil bath, and react for a certain period of time to obtain the product (PU-AO...

Embodiment 3

[0080] 1) Weigh 70-95% PEG into a round-bottomed flask, and fully remove water by rotary evaporation in a vacuum oil bath. Add the above-mentioned PEG and 3-25% DBTDL into the three-necked flask, vacuumize and ventilate with N 2 Protection, magnetic stirring in an oil bath to make it fully melt, add 0.5-1% IPDI, 1.5-4% stannous octoate into the flask, cool down after a certain period of time to obtain PU;

[0081] 2) Add 8ml of AOI to the flask, stir it with magnetic force, and react for a certain period of time to obtain the product (PU-AOI), which is precipitated with anhydrous ether, fully washed and vacuum-dried.

[0082] 3) Weigh 60-95% (PU-AOI), 4-39% ABCN into the three-necked flask, vacuum and ventilate 2 For protection, add a certain amount of steamed anhydrous toluene, stir magnetically to make it fully dissolve, add 1% MPTDMS to the flask, stir magnetically in an oil bath, and react to the product (PU-AOI)-MPTDMS after a certain period of time. The product was pre...

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Abstract

The invention belongs to the field of high polymer materials, and particularly relates to an impact-resistant shear thickening polyurethane hydrogel and a preparation method thereof, wherein the shearthickening hydrogel is formed by blending siloxane modified polyurethane and nano silicon dioxide. According to the shear thickening polyurethane hydrogel provided by the invention, polyurethane (PU)is prepared by taking polyethylene glycol (PEG) and isocyanate as raw materials, and the synthesized PU is modified to obtain the polyurethane hydrogel with impact-resistant shear thickening performance.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an impact-resistant shear-thickening polyurethane hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a polymer swelling body with a network structure that can absorb water and swell in water, and can retain water without dissolving in water. Because of its unique properties, it is widely used in medical treatment, drug delivery system, bionic materials, agriculture, forestry, water and soil protection, etc. At present, there are many classification methods for hydrogels. According to the source, they can be divided into natural hydrogels and synthetic hydrogels; according to their functions, they can be divided into hydrogels that are sensitive to temperature, pH, light, electricity, and pressure. The mechanical properties of gels are poor, and very few of them will be prepared into hydrogels with special material properties. [000...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08F283/00C08F283/12C08F220/56C08G77/458C08G18/83C08G18/81C08G18/48C08G18/75C08L83/04C08K3/36C08K3/38C08K5/14
CPCC08F283/008C08F283/12C08G18/4833C08G18/755C08G18/8108C08G18/837C08G77/458C08K2201/011C08L51/08C08L51/085C08L83/04C08K3/36C08K3/38C08K5/14C08F220/56C08G18/0823
Inventor 苏允兰林阳董侠王笃金
Owner INST OF CHEM CHINESE ACAD OF SCI
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