Method for preparing thermoplastic polyurethane (TPU)/ kieselguhr composite material

A thermoplastic polyurethane and composite material technology, applied in the field of thermoplastic polyurethane composite material preparation, can solve problems such as diatomite-modified TPU composite materials that have not yet been seen, and achieve the advantages of short cycle, convenient processing and molding, and improved mechanical properties and heat resistance. Effect

Inactive Publication Date: 2011-09-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no literature on the use of diatomite modified TPU composite materials

Method used

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  • Method for preparing thermoplastic polyurethane (TPU)/ kieselguhr composite material
  • Method for preparing thermoplastic polyurethane (TPU)/ kieselguhr composite material
  • Method for preparing thermoplastic polyurethane (TPU)/ kieselguhr composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 20g of diatomaceous earth with a particle size of 5000 mesh into a three-necked flask, then add 400ml of cyclohexane, 0.4g of n-propylamine and 2g of silane coupling agent KH-570, stir at room temperature for 30min at a stirring speed of 500r / min, and then Stir at 50°C for 30 min. The reacted solution was rotary evaporated at 60° C. for 1 h, and then vacuum dried at 60° C. for 30 h, and diatomaceous earth was collected. Then, weigh 0.1 g of the modified diatomaceous earth into a three-necked flask at room temperature, then add 95 ml of dimethyl sulfoxide, and ultrasonically disperse for 1 hour. Subsequently, 10g of TPU was added to the above solvent, the temperature was raised to 70°C, and the stirring speed was 500r / min for mechanical stirring for 6h. After the TPU is completely dissolved, the mixture is ultrasonically stirred at a stirring speed of 500r / min for 2h, and finally the solvent is evaporated at 80°C to obtain a TPU / diatomite composite material. Field...

Embodiment 2

[0031] Weigh 25g of diatomaceous earth with a particle size of 300 mesh into a three-necked flask, then add 550ml of cyclohexane, 0.4g of n-propylamine and 3g of silane coupling agent KH-570, stir at room temperature for 40min at a stirring speed of 600r / min, and then Stir at 60°C for 40 min. The reacted solution was rotary evaporated at 70° C. for 1 h, then vacuum dried at 65° C. for 28 h, and diatomaceous earth was collected. Then, weigh 0.3 g of modified diatomaceous earth into a three-necked flask at room temperature, then add 110 ml of xylene, and ultrasonically disperse for 1 hour. Subsequently, 10g of TPU was added to the above solvent, the temperature was raised to 75°C, and the stirring speed was 600r / min for mechanical stirring for 5h. After the TPU is completely dissolved, the mixture is ultrasonically stirred for 1.8 h at a stirring speed of 600 r / min, and finally the solvent is evaporated at 90° C. to obtain a TPU / diatomite composite material. Field emission scan...

Embodiment 3

[0033] Weigh 30g of diatomaceous earth with a particle size of 2000 mesh into a three-necked flask, then add 700ml of cyclohexane, 0.5g of n-propylamine and 4g of silane coupling agent KH-570, stir at room temperature for 50min at a stirring speed of 650r / min, and then Stir at 60°C for 50 min. The reacted solution was rotary evaporated at 80° C. for 50 min, and then vacuum dried at 70° C. for 24 h, and diatomaceous earth was collected. Then, weigh 0.5 g of the modified diatomaceous earth into a three-necked flask at room temperature, then add 120 ml of DMF, and ultrasonically disperse for 2 hours. Subsequently, 10g of TPU was added to the above solvent, the temperature was raised to 80°C, and the stirring speed was 650r / min for mechanical stirring for 4.5h. After the TPU is completely dissolved, the mixture is ultrasonically stirred at a stirring speed of 650r / min for 1.5h, and finally the solvent is evaporated at 100°C to obtain a TPU / diatomite composite material. Field emis...

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Abstract

The invention relates to a method for preparing a thermoplastic polyurethane (TPU)/ kieselguhr composite material. The method comprises the following steps: (1) mixing kieselguhr, cyclohexane, propylamine, and silane coupling agent sequentially, stirring, evaporating, performing vacuum drying, and collecting kieselguhr modified by the silane coupling agent; and at room temperature, adding a TPU solvent into the kieselguhr modified by the silane coupling agent, performing ultrasonic dispersion, adding TPU again, stirring, and after the TPU is completely dissolved, performing ultrasonic stirring at the speed of 500 to 800r/min for 1 to 2 hours, and evaporating the solvent at the temperature of between 80 and 110 DEG C to obtain the TPU/ kieselguhr composite material. In the method, the energy consumption is low, the period is short, and the composite material is convenient to process and form, and is suitable for large-scale production. The mechanical property and the heat resistance of the prepared TPU/ kieselguhr composite material are improved greatly; and the tensile strength of the TPU is increased by 62.24 percent.

Description

Technical field [0001] The invention belongs to the preparation field of thermoplastic polyurethane (TPU) composite materials, and particularly relates to a preparation method of thermoplastic polyurethane (TPU) / diatomite composite materials. Background technique [0002] Thermoplastic polyurethane (TPU) is a type of polyurethane that can be plasticized by heating and dissolved in solvents. It has high modulus, high strength, high elongation and high elasticity, excellent wear resistance, oil resistance, low temperature resistance and aging resistance. It has achieved great success in applications such as industry, medical and health sports goods, daily necessities and military materials. However, TPU products have poor heat resistance and compression set, which limits its further application. [0003] Diatomaceous earth is a kind of non-metallic mineral formed by the sedimentation of the remains of diatoms growing in the ocean or lake under the action of natural environment. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08K9/06C08K3/34
Inventor 李耀刚陈莹王新威王宏志张青红
Owner DONGHUA UNIV
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