Preparation method of nano starch superhydrophobic coating
A super-hydrophobic coating, nano-starch technology, applied in the direction of repelling fibers, fiber types, textiles and papermaking to liquids, etc., can solve problems such as high cost and pollution, reduce environmental harm, simple process and low price. low cost effect
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[0020] A kind of preparation method that contains nano-starch superhydrophobic coating, specifically implements according to the following steps:
[0021] Step 1, adopt ultrasonic treatment starch, prepare nano-starch dispersion liquid;
[0022] The specific process is: weigh starch and water according to the mass ratio of 5-10:100, add the starch into water and stir to disperse the starch evenly, and then perform ultrasonic treatment at 2-10°C for 4-8h to obtain a nano-starch dispersion, wherein , the starch is any one of corn starch, potato starch, sweet potato starch, tapioca starch, wheat starch, and mung bean starch;
[0023] Step 2, surface-treating the nano-starch dispersion to prepare surface-treated nano-starch;
[0024] The specific process is: sequentially add absolute ethanol and double bond-containing silane coupling agent to the nano starch dispersion, stir at 40-80°C for 1-8 hours, centrifuge and wash to obtain surface-treated nano starch, Among them, the volu...
Embodiment 1
[0030] Step 1. Add 5 g of cornstarch into 100 g of water, stir evenly, and then perform ultrasonic treatment at 2° C. for 8 hours to obtain a nano-starch dispersion;
[0031] Step 2. Add 80g of absolute ethanol to the nano starch dispersion, then add 2g of γ-methacryloxypropyltrimethoxysilane, stir and react at 40°C for 8h, centrifuge and wash to get surface treated of nano starch.
[0032] Step 3. Add 2g of sodium dodecylbenzenesulfonate and 0.1g of potassium persulfate into 100g of water and stir evenly, then add 1g of surface-treated nano starch and 5g of vinyl acetate, mix evenly and carry out emulsion polymerization at 40°C. React for 8 hours to obtain a hydrophobic emulsion;
[0033] Step 4. Clean the cotton fabric with distilled water ultrasonically once and then dry it. Take the dried fabric and immerse it in the hydrophobic emulsion prepared in step 3. Stir it at room temperature for 5 minutes, put it in an oven and dry it at 20°C to obtain the emulsion dip coating ...
Embodiment 2
[0035] A kind of preparation method that contains nano-starch superhydrophobic coating, specifically implements according to the following steps:
[0036] Step 1. Add 10 g of potato starch into 100 g of water and stir evenly, then perform ultrasonic treatment at 10° C. for 4 hours to obtain a nano-starch dispersion;
[0037] Step 2: Add 80 g of absolute ethanol to the nano-starch dispersion, then add 2 g of vinyltriethoxysilane, stir and react at 80° C. for 1 hour, centrifuge and wash to obtain surface-treated nano-starch.
[0038] Step 3. Add 6g of sodium lauryl sulfate and 0.3g of ammonium persulfate into 100g of water and stir evenly, then add 5g of surface-treated nano-starch and 15g of vinyl acetate, mix evenly, carry out emulsion polymerization at 60°C, and react for 4h , to obtain a hydrophobic emulsion;
[0039] Step 4. Ultrasonic clean the nylon fabric with distilled water for 4 times and then dry it. Take the dried fabric and immerse it in the hydrophobic emulsion p...
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