Hydrophilic and oleophilic polytetrafluoroethylene micro-powder and preparation method thereof

A polytetrafluoroethylene micropowder and polytetrafluoroethylene technology are applied in the fields of hydrophilic and lipophilic polytetrafluoroethylene micropowder and its preparation, polytetrafluoroethylene micropowder and its preparation field, and can solve the problem of affecting the lipophilicity of polytetrafluoroethylene micropowder. problems such as mechanical properties, to achieve the effects of improving economic and environmental benefits, simple preparation methods and high grafting rate

Inactive Publication Date: 2014-07-16
ZHEJIANG GREEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method involves the modification of polytetrafluoroethylene micropowder, this method only irradiates and grafts water-soluble monomer acrylic acid, and only modifies the hydrophilicity of polytetrafluoroethylene micropowder. At the same time, it will inevitably affect the lipophilicity and mechanical properties of PTFE micropowders.

Method used

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  • Hydrophilic and oleophilic polytetrafluoroethylene micro-powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Wash and dry the oil stains on the waste polytetrafluoroethylene scraps, use a crusher to primary crush the large pieces of waste polytetrafluoroethylene scraps, put them into polyethylene plastic bags, and remove them. Gas, airtight. Afterwards, the plastic bag containing the discarded polytetrafluoroethylene scraps was irradiated and pulverized by an electron beam generated by an accelerator, and then unpacked and degassed in a fume hood to obtain polytetrafluoroethylene micropowder.

[0037] Prepare methanol and water as a solvent in a ratio of 1:2, then add 15 parts of polytetrafluoroethylene micropowder with a particle size of 2 μm obtained above into the prepared solvent, and then add 5 parts of anionic surfactant dodecane Sodium sulfate, 25 parts of water-soluble monomer acrylic acid, 40 parts of oil-soluble monomer styrene, 1 part of concentrated H 2 SO 4 1. 1 part of inorganic compound polymerization inhibitor ferrous ammonium sulfate, mix evenly, and stir wa...

Embodiment 2

[0039] Wash and dry the oil stains on the waste polytetrafluoroethylene scraps, use a crusher to primary crush the large pieces of waste polytetrafluoroethylene scraps, put them into polyethylene plastic bags, and remove them. Gas, airtight. Afterwards, the plastic bag containing the discarded polytetrafluoroethylene scraps was irradiated and pulverized by an electron beam generated by an accelerator, and then unpacked and degassed in a fume hood to obtain polytetrafluoroethylene micropowder.

[0040] Prepare methanol and water as a solvent in a ratio of 1:4, then add 25 parts of polytetrafluoroethylene micropowder with a particle size of 1 μm obtained above into the prepared solvent, and then add 8 parts of anionic surfactant dodecane Sodium sulfonate, 35 parts of water-soluble monomer acrylic acid, 60 parts of oil-soluble monomer styrene, 2 parts of concentrated H 2 SO 4 1. 2 parts of inorganic compound polymerization inhibitor ferrous ammonium sulfate, mix evenly, and sti...

Embodiment 3

[0042] Wash and dry the oil stains on the waste polytetrafluoroethylene scraps, use a crusher to primary crush the large pieces of waste polytetrafluoroethylene scraps, put them into polyethylene plastic bags, and remove them. Gas, airtight. Afterwards, the plastic bag containing the discarded polytetrafluoroethylene scraps was irradiated and pulverized by an electron beam generated by an accelerator, and then unpacked and degassed in a fume hood to obtain polytetrafluoroethylene micropowder.

[0043] Prepare ethanol and water as a solvent in a ratio of 1:4, then add 25 parts of polytetrafluoroethylene micropowder with a particle size of 2 μm obtained above into the prepared solvent, and then add 8 parts of nonionic surfactant fatty acid glycerin Ester, 35 parts of water-soluble monomer sulfonic acid group, 60 parts of oil-soluble monomer N-alkylacrylamide, 1 part of concentrated H 2 SO 4 , 2 parts of hydroquinone, a phenolic polymerization inhibitor, mix well, and stir the ...

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Abstract

The present invention relates to hydrophilic and oleophilic polytetrafluoroethylene micro-powder and a preparation method thereof. According to the hydrophilic and oleophilic polytetrafluoroethylene micro-powder, in a solvent, in the presence of 5-10 parts of a surfactant, 1-3 parts of concentrated H2SO4, and 1-3 parts of a polymerization inhibitor, 15-30 parts of polytetrafluoroethylene micro-powder crushed through electron beam irradiation, 25-50 parts of a water-soluble monomer and 40-80 parts of an oil-soluble monomer are grafted to prepare the hydrophilic and oleophilic polytetrafluoroethylene micro-powder. According to the present invention, the water-soluble monomer and the oil-soluble monomer are grafted on the polytetrafluoroethylene micro-powder, such that the polytetrafluoroethylene micro-powder maintains the original excellent performance, further has functions of hydrophilicity and lipophilicity, has good dispersity, and can be uniformly blended with other materials.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene micropowder and a preparation method thereof, in particular to a hydrophilic and lipophilic polytetrafluoroethylene micropowder and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] PTFE is a special engineering plastic with excellent comprehensive performance, and has the reputation of "King of Plastics". The structural formula of polytetrafluoroethylene is (CF 2 CF 2 ) n , in the PTFE molecule, CF 2 The units are arranged in a zigzag shape. Since the Van der Waals radius of the fluorine atom is slightly larger than that of the hydrogen atom, the Van der Waals force between the atoms is relatively large, resulting in a strong repulsive force, so adjacent units cannot be completely in the trans Cross orientation, but to form a helical conformation, because the fluorine atom has a suitable atomic radius, so that each fluorine atom can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F259/08C08F2/54
Inventor 胡松林范的伟许锡均
Owner ZHEJIANG GREEN NEW MATERIALS
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