Antifouling coating material and preparation method and application thereof
A technology of antifouling coatings and raw materials, applied in antifouling/underwater coatings, coatings, polyurea/polyurethane coatings, etc. Pollution performance cannot be balanced, avoid chemical crosslinking, high flexibility and fluidity
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Embodiment 1
[0044] Preparation of low surface energy antifouling materials based on multiple physical crosslinking:
[0045] (1) Add 30.00 g of bisamino-terminated PDMS (molecular weight ~ 3000 g / mol) and 45 ml of tetrahydrofuran into a three-necked flask, seal it, place it in a water bath at 25 °C, pass nitrogen gas for 10 min, and stir magnetically at 300 rpm for 30 min.
[0046] (2) Dissolve 1.68 g of hexamethylene diisocyanate in 5 ml of tetrahydrofuran, and add it dropwise to the three-necked flask in step (1), pass nitrogen gas in a water bath at 25°C for 10 min, and stir magnetically at 300 rpm for 24 h.
[0047] The reaction equation for the copolymerization of double-blocked PDMS and hexamethylene diisocyanate is as follows: figure 1 Shown, wherein R is a hexamethylene group. The molar concentration of diamino-terminated PDMS in the solution is 0.2mol / L, the molar concentration of hexamethylene diisocyanate is 0.2mol / L, and the molar ratio of amino groups to isocyanate groups is...
Embodiment 2
[0055] Preparation of low surface energy antifouling materials based on multiple physical crosslinking:
[0056] (1) Add 30.00 g of bisamino-terminated PDMS (molecular weight ~ 3000 g / mol) and 45 ml of tetrahydrofuran into a three-necked flask, seal it, place it in a water bath at 25 °C, pass nitrogen gas for 10 min, and stir magnetically at 300 rpm for 30 min.
[0057] (2) 1.68g of hexamethylene diisocyanate (HDI) was dissolved in 5ml of tetrahydrofuran, and added dropwise to the three-necked flask of step (1), nitrogen gas flowed in a water bath at 25°C for 10min, and magnetic stirring at 300rpm for 24h.
[0058] The reaction equation for the copolymerization of double-blocked PDMS and hexamethylene diisocyanate is as follows: figure 1 Shown, wherein R is a hexamethylene group. The molar concentration of diamino-terminated PDMS in the solution is 0.2mol / L, the molar concentration of hexamethylene diisocyanate is 0.2mol / L, and the molar ratio of amino groups to isocyanate gr...
Embodiment 3
[0066] Preparation of low surface energy antifouling materials based on multiple physical crosslinking:
[0067](1) Add 30.00 g of bisamino-terminated PDMS (molecular weight ~ 3000 g / mol) and 45 ml of tetrahydrofuran into a three-necked flask, seal it, place it in a water bath at 25 °C, pass nitrogen gas for 10 min, and stir magnetically at 300 rpm for 30 min.
[0068] (2) 1.68g of hexamethylene diisocyanate (HDI) was dissolved in 5ml of tetrahydrofuran, and added dropwise to the three-necked flask of step (1), nitrogen gas flowed in a water bath at 25°C for 10min, and magnetic stirring at 300rpm for 24h.
[0069] The reaction equation for the copolymerization of double-blocked PDMS and hexamethylene diisocyanate is as follows: figure 1 Shown, wherein R is a hexamethylene group. The molar concentration of diamino-terminated PDMS in the solution is 0.2mol / L, the molar concentration of hexamethylene diisocyanate is 0.2mol / L, and the molar ratio of amino groups to isocyanate gro...
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