Water-based polytetrafluoroethylene heat-gathering-preventing magnetic-conducting non-stick coating and preparation method thereof
A polytetrafluoroethylene, non-stick coating technology, applied in the direction of magnetic coatings, coatings, etc., can solve the problems of non-stick coating not having magnetic conductivity, affecting the effect of electromagnetic heating, uneconomical, etc., and achieving excellent non-stick performance. , The effect of improving uniform dispersion and high electromagnetic heating efficiency
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[0033] A preparation method of water-based polytetrafluoroethylene polytetrafluoroethylene anti-polymerization heat-conducting magnetic non-stick coating, comprising the following steps:
[0034] 1) Preparation of organically modified magnetically conductive particles: Disperse the magnetically conductive particles in a total amount of 40-60% of water through a pre-dispersion process (ultrasonic or grinding or a combination thereof) to form a slurry of magnetically conductive particles, then add silane coupling Combined agent, stir (200-500rpm) at room temperature for 3-5h and then filter, add a total of 40-60% tetraethyl orthosilicate, heat up to 50-85°C, stir (200-500rpm) after heating After 2-4 hours, the organically modified magnetic permeable particles are obtained after separation.
[0035] 2) Preparation of water-based polytetrafluoroethylene anti-polythermal, magnetically conductive and non-stick coating: adding the organically modified magnetically conductive particle...
Embodiment 1
[0037] 1) Preparation of organically modified magnetic conductive particles:
[0038] Disperse 20 parts of silver powder of magnetically conductive particles in 12 parts of water by ultrasonic process to form a slurry of magnetically conductive particles, add 4 parts of γ-(2,3-glycidyloxy)propyltrimethoxysilane, at room temperature 200rpm After stirring and reacting for 5 hours, filter, add a total of 1.2 parts of tetraethyl orthosilicate, raise the temperature to 50° C., stir and react at 200 rpm for 4 hours after heating, and obtain organically modified magnetically conductive particles.
[0039] 2) Preparation of water-based polytetrafluoroethylene anti-polymerization thermal conductivity and magnetic non-stick coating:
[0040] Add the organically modified magnetically conductive particles prepared in step 1) to a mixture of 60 parts of 60wt% polytetrafluoroethylene emulsion and 1.8 parts of tetraethyl orthosilicate, raise the temperature to 50°C, and stir at 200rpm for 4 ...
Embodiment 2
[0043] 1) Preparation of organically modified magnetic conductive particles:
[0044] Disperse 9 parts of magnetically conductive particle iron powder and 1 part of holmium oxide powder in 4 parts of water by grinding process to form a slurry of magnetically conductive particles, add 2 parts of γ-methacryloxypropyl trimethoxysilane, Stir and react at 500 rpm at room temperature for 3 hours, then filter, add a total of 0.6 parts of tetraethyl orthosilicate, heat up to 85°C, and stir and react at 500 rpm for 2 hours after heating to obtain organically modified magnetic permeable particles.
[0045] 2) Preparation of water-based polytetrafluoroethylene anti-polymerization thermal conductivity and magnetic non-stick coating:
[0046] Add the organically modified magnetically conductive particles prepared in step 1) to a mixture of 20 parts of 60wt% polytetrafluoroethylene emulsion and 0.4 parts of tetraethyl orthosilicate, raise the temperature to 85°C, and stir at 500rpm for 2 ho...
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