A kind of silk product protective agent and preparation method thereof
A technology of protective agent and silk products, applied in textiles and papermaking, fiber treatment, animal fibers, etc., can solve problems such as the large size of silver nanoparticles and titanium dioxide carriers, affecting the antibacterial efficiency of products, limiting application methods and application fields, etc. Achieve the effect of simple operation, low cost and improved controllability
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[0024] The preparation method of the protective agent for silk products includes the following steps:
[0025] Step 1) Add a certain concentration of Ag NO 3 The aqueous solution and the additive aqueous solution are mixed in an appropriate ratio to obtain AgNO containing additives 3 Solution
[0026] Step 2) Use excess NaBH freshly prepared at low temperature 4 Aqueous solution quickly reduces AgNO containing additives at room temperature 3 Shake the solution gently or stir at a medium speed until the solution no longer changes significantly, and the Ag nanocolloid uniformly dispersed in the aqueous solution is obtained;
[0027] Step 3) Combine the obtained Ag nanocolloid with a certain amount of TiO 2 Nano powders are uniformly mixed to obtain TiO loaded with Ag nanoparticles 2 Nanocomposite
[0028] Step 4) TiO loaded with Ag nanoparticles 2 After the nanocomposite material mixture is evaporated to dryness, a powder material is obtained, which is a silk product protective agent, an...
Embodiment 1
[0033] Step 1) Prepare 10 mM PVP aqueous solution;
[0034] Step 2) Prepare 10 mM Ag NO 3 Aqueous solution
[0035] Step 3) Put 0.5 mL of Ag NO 3 Aqueous solution (10 mM), 0.1 mL of PVP aqueous solution (10 mM) and 19.4 mL of water are evenly mixed;
[0036] Step 4) Freshly prepare 50 mL 0.1 M NaBH with ice water 4 Aqueous solution (there should be no bubbles in the solution), take 0.6 mL and quickly add it to the mixed solution obtained in step 3) at room temperature. Shake gently or stir at medium speed until the solution no longer changes significantly, and a uniform dispersion is obtained. Ag nano colloid (size about 4 nm) in aqueous solution;
[0037] Step 5) After placing the Ag nanocolloid obtained in step 4) for about 3 hours, mix 5 mg of commercially available “P25”TiO 2 Add nano-powder (about 20 nm in size) to it and continue to stir for about 1 h, and finally get Ag-loaded nano-TiO dispersed in water 2 Composite material
[0038] Step 6) Centrifuge the product obtained in st...
Embodiment 2
[0040] Step 1) Prepare 50 mM Na 3 CA aqueous solution;
[0041] Step 2) Prepare 10 mM Ag NO 3 Aqueous solution
[0042] Step 3) Put 0.5 mL of Ag NO 3 Aqueous solution (10 mM), 0.1 mL of Na 3 CA aqueous solution (50 mM) and 19.4 mL of water are evenly mixed;
[0043] Step 4) Freshly prepare 50 mL 0.1 M NaBH with ice water 4 Aqueous solution (there should be no bubbles in the solution), take 0.6 mL and quickly add it to the mixed solution obtained in step 3) at room temperature. Shake gently or stir at medium speed until the solution no longer changes significantly, and a uniform dispersion is obtained. Ag nano colloid in aqueous solution (size about 10 nm);
[0044] Step 5) After placing the Ag nanocolloid obtained in step 4) for about 3 hours, mix 5 mg of commercially available “P25”TiO 2 Add nano-powder (about 20 nm in size) to it and continue to stir for about 1 h, and finally get Ag-loaded nano-TiO dispersed in water 2 Composite material
[0045] Step 6) Centrifuge the product obtai...
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