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Preparation method of TiO2/PU composite material

A technology of composite materials and oleic acid, which is applied in the field of preparation of TiO2PU composite materials, can solve problems such as poor electrical conductivity, weak tensile strength, and unstable structure, and achieve the effects of strong electrical conductivity, strong impact resistance, and stable structure

Inactive Publication Date: 2020-06-05
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used nano-materials include inorganic materials such as nano-TiO2, nano-carbon black, and nano-SiO2. At present, nano-TiO2-modified polyurethane composite materials have become important film-forming substances for people to study water-based coatings. However, traditional TiO2PU composite materials have unstable structures and poor conductivity. And tensile strength is weak, can't meet demand, so the present invention proposes a kind of preparation method of TiO2PU composite material

Method used

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  • Preparation method of TiO2/PU composite material
  • Preparation method of TiO2/PU composite material
  • Preparation method of TiO2/PU composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: a kind of TiO2 the preparation method of PU composite material, comprise nanometer TiO2, oleic acid, ethanol, acetone and polyurethane emulsion, preparation steps are:

[0022] (1) Oleic acid modified nano-TiO2:

[0023] In 40mL of acetone, add 6g of oleic acid and 10g of nano-TiO2, mix well, adjust the pH value to 7~7.5, disperse by ultrasonic wave at 55°C for 30min, and stir for 5h on a high-speed homogeneous disperser at a speed of 4000r / min under reflux , filtered with suction, washed with acetone, the temperature was raised to 80°C, dried for 3 hours, and ground to obtain oleic acid modified nano-TiO2 powder;

[0024] (2) Preparation of polymer matrix:

[0025] Add 2.0g of polyurethane emulsion and 0.3g of imidazole into a 50mL beaker, stir for 1h at 80°C water bath temperature, after the temperature drops to 53-56°C, add 3.5g of methyltetrahydrophthalic anhydride curing agent, continue stirring for 2-3h, After the imidazole is completely dissolved,...

Embodiment 2

[0035] Embodiment 2: a kind of TiO2 The preparation method of PU composite material, comprise nanometer TiO2, oleic acid, ethanol, acetone and polyurethane emulsion, preparation steps are:

[0036] (1) Oleic acid modified nano-TiO2:

[0037] In 40mL of acetone, add 6g of oleic acid and 10g of nano-TiO2, mix well, adjust the pH value to 7~7.5, disperse by ultrasonic wave at 55°C for 30min, and stir for 5h on a high-speed homogeneous disperser at a speed of 4000r / min under reflux , filtered with suction, washed with acetone, the temperature was raised to 80°C, dried for 3 hours, and ground to obtain oleic acid modified nano-TiO2 powder;

[0038] (2) Preparation of polymer matrix:

[0039] Add 2.0g of polyurethane emulsion and 0.3g of imidazole into a 50mL beaker, stir for 1h at 80°C water bath temperature, after the temperature drops to 53-56°C, add 3.5g of methyltetrahydrophthalic anhydride curing agent, continue stirring for 2-3h, After the imidazole is completely dissolved,...

Embodiment 3

[0049] Embodiment 3: a kind of TiO2 the preparation method of PU composite material, comprise nanometer TiO2, oleic acid, ethanol, acetone and polyurethane emulsion, preparation steps are:

[0050] (1) Oleic acid modified nano-TiO2:

[0051]In 40mL of acetone, add 6g of oleic acid and 10g of nano-TiO2, mix well, adjust the pH value to 7~7.5, disperse by ultrasonic wave at 55°C for 30min, and stir for 5h on a high-speed homogeneous disperser at a speed of 4000r / min under reflux , filtered with suction, washed with acetone, the temperature was raised to 80°C, dried for 3 hours, and ground to obtain oleic acid modified nano-TiO2 powder;

[0052] (2) Preparation of polymer matrix:

[0053] Add 2.0g of polyurethane emulsion and 0.3g of imidazole into a 50mL beaker, stir for 1h at 80°C water bath temperature, after the temperature drops to 53-56°C, add 3.5g of methyltetrahydrophthalic anhydride curing agent, continue stirring for 2-3h, After the imidazole is completely dissolved, ...

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Abstract

The invention discloses a preparation method of a TiO2 / PU composite material. The coating comprises nano TiO2, oleic acid, ethanol, acetone and a polyurethane emulsion, wherein the preparation methodcomprises the following steps: in acetone, adding a proper amount of oleic acid and nano TiO2; mixing, dispersing and stirring the component, and performing suction filtration and acetone washing; drying and grinding the mixture to obtain oleic acid modified nano TiO2 powder; adding a proper amount of polyurethane emulsion and imidazole into a 50 mL beaker, mixing and stirring the mixture, adding3.5 g of a methyl tetrahydrophthalic anhydride curing agent; continuously stirring the mixture, removing bubbles through a vacuum air filtering pump; carrying out program temperature increase curing to prepare the polyurethane matrix, adding a proper amount of oleic acid modified nano TiO2 and the polyurethane matrix into a beaker containing 50 mL of acetone; after the ultrasonic dispersion reaction, sequentially adding a proper amount of imidazole and methyl tetrahydrophthalic anhydride, stirring the components, removing bubbles in the system by using a vacuum air filtering pump, carrying out program temperature increase curing on the rubber solution in an oven, and curing the rubber solution to obtain the TiO2 / PU composite material. The composite material has the advantages of stable structure, high impact resistance, high tensile strength and high conductivity.

Description

technical field [0001] The invention discloses a preparation method of a TiO2PU composite material, which belongs to the technical field of TiO2PU composite material preparation. Background technique [0002] Traditional coatings can volatilize volatile organic compounds (VOC), affecting the environment and people's health. Water-based coatings will replace traditional coatings and become an inevitable trend in the future development of the coatings industry; [0003] As a functional polymer material with excellent performance, polyurethane (PU) has the characteristics of low density, high elasticity, wear resistance and strong flexibility. It is widely used in coatings, adhesives, medical materials, food packaging and daily Footwear and other fields. But it also has some shortcomings, such as poor thermal stability, weak mechanical properties and other defects. In order to improve the performance of polyurethane, nano-materials are often used to modify polyurethane to mak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K9/04C08K3/22
CPCC08K3/22C08K9/04C08K2003/2241C08K2201/011C08L75/04
Inventor 王升文
Owner YANGZHOU POLYTECHNIC INST