Preparation method of anti-ultraviolet konjac composite film
A composite film and anti-ultraviolet technology, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, household components, etc., to achieve the effects of increased ultraviolet absorption performance, improved uniformity, and increased shrinkage
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[0034] Specifically, the preparation method includes the following steps:
[0035] Step 1, prepare konjac glucomannan sol film: elute konjac fine powder, dry, grind and sieve to obtain konjac glucomannan, and add glycerin, silver bromide and water to konjac glucomannan , stirring to obtain a mixed solution, and stirring after adding graphene oxide into the mixed solution to obtain a konjac glucomannan sol, and forming a film of the konjac glucomannan sol, and defoaming;
[0036] Specifically, in step 1, konjac fine powder is eluted in 68-85% ethanol for 30-50 minutes, dried at 80-90°C, ground, and sieved through a 200-400 mesh sieve to obtain konjac grape Mannan.
[0037] Specifically, in step 1, the amount of sieved konjac glucomannan is 0.4-0.9g and placed in a container bottle, and the capacity of adding glycerin is 4.0-6.5ml, and the capacity of silver bromide solution is 8-10ml, Then add 100-120ml of water for mixing to obtain a mixed solution.
[0038] Specifically, i...
Embodiment 1
[0048] The method of the present embodiment comprises the following steps:
[0049]Step 1. Preparation of konjac glucomannan sol: konjac fine powder was eluted in 68% ethanol for 30 minutes, dried at 80° C., ground, and sieved with a 200-mesh sieve. Take 0.4 g of sieved konjac glucomannan, 4.0 ml of glycerin, add 8 ml of silver bromide solution, and add water to 100 ml. The mixing speed was 600 rpm, and the stirring was carried out for 15 minutes. Add 0.15 g of graphene oxide, and use the sixth gear of the homogenizer for 2 minutes. Every 60ml of sol was inverted in a mold whose length×width×height was 25mm×10mm×0.8mm. Hold the two corners of the mold in your hand, beat the table quickly, and quickly remove the air bubbles. The mold was placed in a steam oven at 55°C for 25 minutes.
[0050] Step 2. Preparation of aramid sol: 0.2 g of konjac glucomannan was added to aramid fiber solution with a concentration of 3 mg / ml and a volume of 40 ml. The stirring speed is 200rpm, ...
Embodiment 2
[0053] The method of the present embodiment comprises the following steps:
[0054] Step 1. Preparation of konjac glucomannan sol: konjac fine powder was eluted in 68% ethanol for 30 minutes, dried at 80° C., ground, and sieved with a 200-mesh sieve. Take 0.5 g of sieved konjac glucomannan, 4.5 ml of glycerin, add 8 ml of silver bromide solution, and add water to 100 ml. The mixing speed was 600 rpm, and the stirring was carried out for 15 minutes. Add 0.20 g of graphene oxide, and use the sixth gear of the homogenizer for 2 minutes. Every 60ml of sol was inverted in a mold whose length×width×height was 25mm×10mm×0.8mm. Hold the two corners of the mold in your hand, beat the table quickly, and quickly remove the air bubbles. The mold was placed in a steam oven at a temperature of 55° C. for 25 minutes.
[0055] Step 2. Preparation of aramid sol: 0.2 g of konjac glucomannan was added to aramid fiber solution with a concentration of 3 mg / ml and a volume of 40 ml. The stirri...
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