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Nanometer tectonic polyvinylidene fluoride composite material and preparation method thereof

A polyvinylidene fluoride and composite material technology is applied in the field of nano-structured polyvinylidene fluoride composite material and its preparation to achieve the effects of reducing generated heat, improving Young's modulus and improving toughness

Active Publication Date: 2015-08-26
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have never been any reports at home and abroad that PVDF and IL can be prepared into nanostructured composite materials by ordinary methods

Method used

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  • Nanometer tectonic polyvinylidene fluoride composite material and preparation method thereof
  • Nanometer tectonic polyvinylidene fluoride composite material and preparation method thereof
  • Nanometer tectonic polyvinylidene fluoride composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Step (1), first, 100g of PVDF and 8g of 1-vinyl-3-butylimidazolium chloride salt are added to the melt blending equipment (specific equipment), the temperature is 190°C, and when the rotation speed is 20rpm / min, the mixing time is 2min; when the rotation speed is 50rpm, the mixing time is 5min. Then discharge, to obtain the blend of PVDF and IL, denoted as PVDF / IL (100 / 8) blend.

[0045] Step (2), prepare a film with a thickness of 0.3 mm from the above PVDF / IL (100 / 8) blend on a flat vulcanizer. The temperature of the plate vulcanizer is 200°C, and the pressure is 15MPa; hot pressing first, the time is 3min; then cold pressing, the time is 1min. Finally, PVDF / IL (100 / 8) film was obtained.

[0046] Step (3), putting the above-mentioned PVDF / IL (100 / 8) film in a polyethylene ziplock bag and sealing it. In electron beam irradiation, radiation grafting at room temperature was carried out at a radiation dose of 10 kGy. The irradiated samples were subjected to methanol S...

Embodiment 2

[0050] PVDF was dried overnight in a vacuum oven at 80°C, and 100.00 g was weighed for use; 8 g of 1-vinyl-3-butylimidazolium chloride was weighed respectively. Add the above two materials into the internal mixer at the same time, the temperature of the internal mixer is 190°C, and when the rotor speed of the internal mixer is 20rpm / min, banbury for 1min; then increase the speed to 50rpm / min and banbury for 5min After discharge.

[0051] The PVDF / IL composite obtained above was made into a 500 micron film on a flat vulcanizer. The specific process is as follows: hot press the obtained PVDF / IL in an abrasive tool at 200°C and 15 MPa for 10 min; then cold press at room temperature and 15 MPa for 5 min. Finally, a 500 micron PVDF / IL film was obtained.

[0052] Put the PVDF / IL film obtained above into a polyethylene ziplock bag and irradiate with electron beams at a certain absorbed dose; the absorbed dose of radiation is 100 kGy.

[0053] Finally, the above irradiated PVDF / IL ...

Embodiment 3

[0056] PVDF was dried overnight in a vacuum oven at 80°C, and 100.00 g was weighed for use; 3 g of 1-vinyl-3-butylimidazolium chloride was weighed respectively. Add the above two materials into the internal mixer at the same time, the temperature of the internal mixer is 190°C, and when the rotor speed of the internal mixer is 20rpm / min, banbury for 1min; then increase the speed to 50rpm / min and banbury for 5min After discharge.

[0057] The PVDF / IL composite obtained above was made into a film of 400 microns on a flat vulcanizer. The specific process is as follows: hot press the obtained PVDF / IL in an abrasive tool at 200°C and 20 MPa for 5 min; then cold press at room temperature and 20 MPa for 2 min. Finally, a 400 micron PVDF / IL film was obtained.

[0058] Put the PVDF / IL film obtained above into a polyethylene ziplock bag and carry out electron beam irradiation under a certain absorbed dose; the absorbed dose of radiation is 800kGy.

[0059] Finally, the irradiated PVD...

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Abstract

The invention discloses a nanometer tectonic polyvinylidene fluoride composite material and a preparation method thereof. The nanometer tectonic polyvinylidene fluoride composite material is a nanometer structural material composed of a PVDF (polyvinylidene fluoride) basal body and a PVDF nanometer micro area which uses IL (interleukin) to graft. The preparation method of the nanometer tectonic polyvinylidene fluoride composite material includes: adding the PVDF and the IL to a melt-mixing device to melt and mix, discharging, and cooling crystallization, and pressing into a thin film and melting in high temperature and cooling after radiation and irradiation. The nanometer tectonic polyvinylidene fluoride composite material and the preparation method thereof have the advantages that the PVDF-g-IL nanometer micro area limits the IL in a nanometer size, and therefore movements of the IL under an extra electric field are reduced, and furthermore dielectric loss of the IL and hot generated are decreased, and use life of the nanometer tectonic polyvinylidene fluoride composite material is prolonged. (2) The PVDF-g-IL nanometer micro area is an organic conductive micro area due to the fact that ionic liquid is added, and therefore electrical conductivity of pure PVDF is greatly improved. (3) The PVDF-g-IL nanometer micro area increases young modulus of the pure PVDF due to the fact that PVDF molecular weight is increased.

Description

technical field [0001] The invention relates to a nanostructured polyvinylidene fluoride composite material and a preparation method thereof, in particular to a multi-step method for preparing ionic liquid and polyvinylidene fluoride into a nanostructured material. Background technique [0002] Polyvinylidene fluoride (PVDF) dielectric material is widely used in the electronics industry in industrial sectors and high-tech fields because of its excellent dielectric properties and better flexibility (mechanical properties) endowed by the PVDF matrix. At present, it has been reported in the literature that a functional PVDF composite material can be obtained by combining room temperature ionic liquid (RTIL) with PVDF, and its functions include transparency, antistatic property and high content of polar crystals. Studies have shown that the interaction parameters of PVDF and IL are negative, and the two have good thermodynamic compatibility, which is the fundamental reason why I...

Claims

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Application Information

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IPC IPC(8): C08J3/28C08L27/16C08L51/00C08F259/08C08F226/06
Inventor 李勇进邢晨阳
Owner HANGZHOU NORMAL UNIVERSITY