Chitosan/fibroin-based dual-structure porous adsorption filter material with silicon dioxide as pore-forming agent and preparation method of chitosan/fibroin-based dual-structure porous adsorption filter material
A silicon dioxide and porous adsorption technology, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, and other chemical processes, can solve the problem that silk fibroin materials do not have the function of heavy metal adsorbent, and the adsorption of heavy metal ions is poor. problems, to achieve high adsorption rate, excellent performance, and increase the effect of specific surface area
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0049] Preparation of chitosan film
[0050] Step 1: Take 20mL of formic acid and acetic acid solutions with a concentration of 1%~5% and place them in a beaker, then weigh 0.6g of chitosan and pour them into it, set the temperature of the collector type constant temperature magnetic stirrer at 30°C, stirring at a constant speed of 200r / min until the chitosan is completely dissolved.
[0051] Step 2: Let the dissolved chitosan solution stand for degassing for 30 minutes, and then pour the solution into a plastic dish by casting method, and then volatilize and dry naturally at room temperature for 24 hours to form a film.
[0052] The third step: soak the dried chitosan film in 0.5% sodium hydroxide solution for 2h to neutralize the residual acid in the film. Afterwards, the membrane was rinsed repeatedly with deionized water, and then soaked in 1000 mL of deionized water for 24 h to remove excess sodium hydroxide residue. Finally, the membrane was dried at room temperature fo...
Embodiment 2
[0056] Preparation of chitosan / silk fibroin blend film:
[0057] Step 1: Dissolve chitosan with 3% formic acid, set the temperature of the heat-collecting constant temperature magnetic stirrer at 30°C, and stir at a constant speed of 200 r / min. After the chitosan powder is completely dissolved, add chitosan Add 98% formic acid to the sugar solution to make the formic acid content in the solution reach a predetermined concentration (30%, 40%, 50%, 60%, 70%, 98%), stir evenly and set aside.
[0058] Step 2: Dissolve the regenerated silk fibroin directly with 98% formic acid, and stir at a constant speed of 20 r / min at a temperature of 30°C. After it is completely dissolved, take an appropriate amount of silk fibroin solution and quickly pour it into the high-speed stirring chitosan In the solution, silk fibroin and chitosan in the blending system reach an appropriate ratio (0:10, 2:8, 4:6, 5:5, 6:4, 7:3, 8:2, 9:1, 10:0), keep stirring at high speed for 5 minutes, and then let i...
Embodiment 3
[0069] Preparation of Chitosan / Silk Fibroin Porous Membrane Using Nano-SiO2 as Porogen
[0070] Step 1: Dissolve chitosan with 3% formic acid, set the temperature of the heat-collecting constant temperature magnetic stirrer at 30°C, and stir at a constant speed of 200 r / min. After the chitosan powder is completely dissolved, add chitosan Add 98% formic acid to the sugar solution to make the formic acid content in the solution reach a predetermined concentration, stir evenly and set aside.
[0071] The second step: directly dissolve the regenerated silk fibroin with 98% formic acid, and stir at a constant speed of 20 r / min at a temperature of 30°C until it is completely dissolved, and the concentration of the silk fibroin solution is 10wt%.
[0072] Step 3: Take nano-silica (0g, 0.2g, 0.3g, 0.4g, 0.5g) and add chitosan solution, after it is evenly mixed with chitosan solution, quickly pour in appropriate amount of silk fibroin solution and stir at high speed , keep stirring at...
PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More