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Polyurethane hydrogel of composite nanoparticles and application

A technology of composite nanoparticles and polyurethane, which is applied in the field of hydrogel, can solve the problems of difficult attachment of microorganisms, slow growth and reproduction, small specific surface area, etc., and achieve easy transfer and homogenization, suitable for large-scale production, and simple operation Effect

Pending Publication Date: 2022-06-14
景赫新材料科技浙江有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used as a carrier, the traditional porous hydrogel has a smooth inner surface, small specific surface area, difficult for microorganisms to attach, and slow growth and reproduction; when used as a medical and sanitary material, the traditional porous hydrogel has low toughness and is easy to break

Method used

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  • Polyurethane hydrogel of composite nanoparticles and application
  • Polyurethane hydrogel of composite nanoparticles and application

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preparation example Construction

[0050] In some preferred embodiments, the polyurethane hydrogel preparation method of the kind of composite nanoparticles comprises the following steps:

[0051] Step 1: Dehydrate the polyol vacuum until the water content is below 0.1%, and then after dehydration, the polyol and diisocyanate are uniformly mixed in the reaction kettle for 2-4h to obtain the first component;

[0052] Step 2: Disperse the coupling agent with nano-inorganic particles in a solution with a volume ratio of 1:9 in distilled water and absolute ethanol, sonicate, filter, dry, and prepare surface-treated nano-inorganic particles; The blowing agent, inorganic metal catalyst, silicone oil, chain spreader, surface treated nano-inorganic particles are mixed and ultrasonically treated to obtain a second component.

[0053] Step 3: The first component is mixed with the second component, and then transported to the membrane for foaming, the temperature is 35 °C-50 °C, and the polyurethane hydrogel of the composite ...

Embodiment 1

[0062] The present embodiment provides a polyurethane hydrogel of composite nanoparticles, the raw materials prepared by weight comprise 20 parts of polyisocyanates, 50 parts of polyols, 10 parts of inorganic nanoparticles, 1 part of silicone oil, 10 parts of chain expander, 50 parts of blowing agent, 2 parts of coupling agent, 1 part of organometallic catalyst.

[0063] The preparation method of the polyurethane hydrogel of the composite nanoparticles comprises the following steps:

[0064] Step 1: The polyol is dehydrated to a water content of less than 0.1% under the condition of vacuum of -0.5MPa and a temperature of 115 °C; then the dehydrated polyol and diisocyanate are mixed in the reactor for 3h, and the reaction temperature is 75 °C to prepare the first component.

[0065] Step 2: Disperse the coupling agent with nano-inorganic particles in a solution with a volume ratio of 1:9 in distilled water and absolute ethanol, sonicate, filter, dry, and prepare surface-treated nan...

Embodiment 2

[0069]The present embodiment provides a polyurethane hydrogel of composite nanoparticles, the raw materials prepared by weight comprise 20 parts of polyisocyanates, 50 parts of polyols, 10 parts of inorganic nanoparticles, 1 part of silicone oil, 10 parts of chain expander, 50 parts of blowing agent, 2 parts of coupling agent, 1 part of organometallic catalyst.

[0070] The preparation method of polyurethane hydrogel of composite nanoparticles, comprising the following steps:

[0071] Step 1: The polyol is dehydrated to a water content of less than 0.1% under the condition of vacuum of -0.5MPa and a temperature of 115 °C; then the dehydrated polyol and diisocyanate are mixed in the reactor for 3h, and the reaction temperature is 75 °C to prepare the first component.

[0072] Step two: the coupling agent and nano-inorganic particles dispersed in distilled water and anhydrous ethanol volume ratio of 1:9 solution, sonication, filtration, drying, preparation of surface treatment of na...

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Abstract

The invention relates to the technical field of hydrogel, in particular to polyurethane hydrogel of composite nanoparticles and application, and the polyurethane hydrogel is prepared from the following raw material components in parts by weight: 10-30 parts of polyisocyanate, 40-60 parts of polyol, 0.1-20 parts of inorganic nanoparticles, 0.1-2 parts of silicone oil, 1-20 parts of a chain extender, 0-100 parts of a foaming agent, 0.1-2 parts of a coupling agent and 0.1-2 parts of an organic metal catalyst. According to the invention, the polyurethane material has certain toughness, and the reinforcing effect of the inorganic nanoparticles is added, so that the mechanical strength and toughness of the polyurethane hydrogel are improved, the service life of the polyurethane hydrogel is prolonged, and meanwhile, the inorganic nanoparticles subjected to surface treatment by the coupling agent are adopted, so that the mechanical strength and toughness of the polyurethane hydrogel are improved. The bridging effect between the polyurethane matrix and the inorganic nanoparticles is enhanced, the interface bonding strength of the polyurethane matrix and the inorganic nanoparticles is improved, the interface debonding of the composite gel is delayed, meanwhile, stress transfer and homogenization are facilitated, and the mechanical property of the composite gel is obviously improved.

Description

Technical field [0001] The present invention relates to the field of hydrogel technology, specifically to a polyurethane hydrogel of a composite nanoparticle and its applications. Background [0002] Polyurethane hydrogels are chemically inactive, non-toxic, biocompatible, excellent mechanical properties, high water absorption, and easy to process and form, and are widely used in various fields such as agriculture and forestry, medicine, daily chemicals, environmental protection and desert control. In terms of agriculture, forestry and horticulture, polyurethane gel has high water absorption rate and strong water retention, and can be used as plant growth, growth promoter, seedling transplant preservation agent, etc., making it have broad application prospects in agriculture, forestry and desert greening; In medicine as well as daily chemistry, polyurethane gels are chemically stable, have physical properties similar to those of human tissues, and can be used directly as material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L75/08C08K9/06C08K9/04C08K3/34C08G18/66C08G18/48C08G18/32C08G18/10C08G101/00
CPCC08J3/075C08G18/6677C08G18/6674C08G18/4854C08G18/10C08J2375/08C08K9/06C08K9/04C08K3/346C08K2201/011C08G18/3206
Inventor 马阿思
Owner 景赫新材料科技浙江有限公司
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