Preparation and application of green and environment-friendly super-hydrophobic clay
A green and super-hydrophobic technology, applied in epoxy resin coatings, coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor protection performance and weak mechanical performance, and achieve strong protection ability, low cost, and good adhesion. focus effect
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Embodiment 1
[0028] 1) Preparation of modified sepiolite:
[0029] ①Weigh 3.2g of sepiolite raw material and place it in a vacuum drying oven, vacuumize it, and dry it at 120°C for 24h;
[0030] The natural sepiolite powder is a fibrous magnesium-rich silicate clay mineral, the fiber length can reach several microns, and the natural sepiolite powder is abundant in nature and environmentally friendly and non-toxic. There are a large number of silanol groups on the outer surface of sepiolite, and the difficulty of hydrophobic modification is low; the special crystal structure inside sepiolite has a large specific surface area and high surface activity, and has strong adsorption and excellent Filling, suitable as a pigment and filler for organic coatings.
[0031] ② Dissolve the above sepiolite in 35g of anhydrous ethanol solvent, stir mechanically for 24h, and keep the temperature at (25±2)°C;
[0032] 3. Weigh 2 mL of titanate (KR-TTS) and dissolve it in 5 mL of tetraethyl orthosilicate, ...
Embodiment 2
[0052] The difference from Example 1 is that the sepiolite surface treatment agent is different, and the modified organic resin is different:
[0053] 1) Preparation of modified sepiolite:
[0054] ①Weigh 4.6g of raw sepiolite and place it in a vacuum drying oven, vacuumize it, and dry it at 130°C for 12h;
[0055] ② Dissolve the above sepiolite in 25g of anhydrous ethanol solvent, stir mechanically for 20h, and keep the temperature at (25±2)°C;
[0056] 3. Weigh 5 mL of titanate (TL-411A) and dissolve it in 6 mL of tetraethyl orthosilicate. After ultrasonic treatment for 40 min, pour the solution into the above-mentioned sepiolite that is being mechanically stirred, and continue to stir for 36 h;
[0057] ④ Take out the product after stirring, grind it, sieve it, put it in a sealed bag and store it in a dry dish.
[0058] 2) Preparation of composite organic coating:
[0059] Weigh 8g of polyurethane resin and 0.4g of the modified sepiolite prepared above, heat and stir in ...
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