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Titanium dioxide/nanosilver/cocoon fiber magnetic porous composite material and preparation method thereof

A porous composite material, titanium dioxide technology, applied in the field of composite materials, to achieve the effect of improved photocatalytic activity, low density, and mild reaction conditions

Inactive Publication Date: 2017-12-22
钱景
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, there are few literatures on the preparation of salix-based nanocomposites using extracted salix cellulose as raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Prepare 10g / L dopamine Tris-HCl buffer solution, adjust the pH value to 8.5, soak the salix cellulose in step 1 in the above buffer solution for 24 hours at room temperature, bath ratio 1:50, deionized water repeatedly After washing, polydopamine-modified salix cellulose was obtained; (2) Dissolve silk protein in deionized water to prepare a 10g / L aqueous solution, and slowly drop 10g / L ferric chloride aqueous solution into In the silk protein aqueous solution, stir evenly, wherein the mass ratio of silk protein and ferric chloride is 1:1, add the calcium chloride solution that concentration is 2wt% with the speed of 30 drops / min dropwise, calcium chloride and The mass ratio of silk protein is 1:50, adjust the pH value to 10, stir at a constant speed at 60°C for 1 hour, then slowly add the polydopamine-modified salix cellulose in step 1, the mass ratio of modified salix cellulose to silk protein 1:1, ultrasonically mixed evenly, poured into a mold, put in liquid nit...

Embodiment 2

[0025](1) Prepare 30g / L dopamine Tris-HCl buffer solution, adjust the pH value to 8.5, soak the salix cellulose in step 1 in the above buffer solution for 24 hours at room temperature, bath ratio 1:50, deionized water repeatedly After washing, polydopamine-modified Salix cellulose was obtained; (2) Dissolve silk protein in deionized water to prepare a 20g / L aqueous solution, and slowly drop 30g / L ferric sulfate aqueous solution into the In the silk protein aqueous solution, stir evenly, wherein the mass ratio of silk protein and iron sulfate is 2:1, add calcium chloride solution with a concentration of 3wt% dropwise at a speed of 30 drops / min, calcium chloride and silk protein The mass ratio is 1:50, adjust the pH value to 11, stir at a constant speed at 60°C for 1 hour, slowly add the polydopamine-modified salix cellulose in step 1, the mass ratio of modified salix cellulose to silk protein is 1 : 1. After ultrasonic mixing, pour it into a mold, put it in liquid nitrogen for ...

Embodiment 3

[0027] (1) Prepare 50g / L dopamine Tris-HCl buffer solution, adjust the pH value to 8.5, soak the salix cellulose in step 1 in the above buffer solution for 24 hours at room temperature, bath ratio 1:50, deionized water repeatedly After washing, polydopamine-modified salix cellulose was obtained; (2) Dissolve silk protein in deionized water to prepare a 50g / L aqueous solution, and slowly drop 50g / L ferric nitrate aqueous solution into the In the silk protein aqueous solution, stir evenly, wherein the mass ratio of silk protein and ferric nitrate is 5:1, add calcium chloride solution with a concentration of 5wt% dropwise at a speed of 30 drops / min, calcium chloride and silk protein The mass ratio is 1:50, adjust the pH value to 12, stir at a constant speed at 60°C for 1 hour, slowly add the polydopamine-modified salix cellulose in step 1, the mass ratio of modified salix cellulose to silk protein is 1 : 1. After ultrasonic mixing, pour it into a mold, put it in liquid nitrogen f...

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Abstract

The invention discloses a titanium dioxide / nanosilver / cocoon fiber magnetic porous composite material and a preparation method thereof. The preparation method comprises the following steps: modifying salix psammophila cellulose by using polydopamine; carrying out freeze-drying treatment by using liquid nitrogen to obtain the magnetic porous composite material; immersing the magnetic porous composite material into a mixed solution with a silver-ammonia solution and titanium dioxide nanotubes for reacting for 60-300 minutes, taking the magnetic porous composite material out of the mixed solution, then repeatedly washing the magnetic porous composite material with deionized water, and carrying out vacuum drying to obtain the magnetic porous composite material. According to the magnetic porous composite material, salix psammophila and cocoon fibers are used as base materials, so that raw materials are abundant and the cost is low; then magnetic nano ferroferric oxide, nanosilver and titanium dioxide nanotubes are effectively and synergistically self-assembled to obtain a porous nanocomposite material; the porous nanocomposite material has important application values in the fields such as adsorption materials, photocatalysis, biological materials and medical materials and the like.

Description

technical field [0001] The invention relates to a titanium dioxide / nanometer silver / silk magnetic porous composite material and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] Silk is known as the queen of fibres. It feels soft, thick, smooth, plump, and has a soft luster like pearls. It is widely used in the textile and clothing industries. Silk is composed of sericin and silk fibroin, wherein sericin is located in the outer layer of silk with a content of 20%-30%, and silk fibroin is located in the inner layer of silk with a content of 70%-80%. Silk fibroin located in the inner layer of silk is a natural polymer material composed of 18 kinds of amino acids such as serine, glycine and alanine, with a molecular weight of about 2300kDa. It consists of heavy chain, light chain and P25, wherein the molecular weight of the heavy chain H chain is 350kDa, the molecular weight of the light chain L chain is 26kDa, and the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08L1/02C08L79/04C08K3/22C08K3/08C08K7/24C08K9/02C08J9/28
CPCC08L89/00C08J9/28C08J2201/0484C08J2389/00C08J2401/02C08K2003/0806C08K2003/2275C08K2201/011C08L2203/14C08L2205/03C08L2205/08C08L1/02C08L79/04C08K3/22C08K3/08C08K7/24C08K9/02
Inventor 钱景赵兵
Owner 钱景
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