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Preparation method of tannin-loaded collagen/cellulose composite biological adsorption material

A technology of biological adsorption and collagen fibers, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of limited adsorption capacity and failure to improve the ability of collagen to withstand microbial action, so as to avoid denaturation and reusable performance. , The effect of improving the adsorption capacity

Inactive Publication Date: 2014-06-25
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material mainly relies on the -OH group of the collagen side chain for adsorption, because the distribution of -OH groups in the collagen side chain is relatively sparse, resulting in a certain limitation in its adsorption capacity.
In addition, hydrogen bonding between collagen and cellulose fails to improve the ability of collagen to withstand microbial action

Method used

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  • Preparation method of tannin-loaded collagen/cellulose composite biological adsorption material
  • Preparation method of tannin-loaded collagen/cellulose composite biological adsorption material
  • Preparation method of tannin-loaded collagen/cellulose composite biological adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0030] (1) Collect waste ash and alkali skins from the tanning industry, deash, wash, and grind. Take 30g of minced skin, add it to 900mL of acetic acid solution (2.0% by volume), add 0.3g of pepsin, centrifuge at 3000r / min, take the supernatant and freeze-dry to obtain spongy collagen fibers.

[0031] (2) Dissolve 1.5g of cellulose powder (cellulose content=95wt%, degree of polymerization=300) in 40g of EmimAc ionic liquid, and control the temperature at 40°C to completely dissolve the cellulose to obtain an ionic liquid containing cellulose, and cool down.

[0032] (3) Add 0.15 g of collagen fibers obtained in step (1) to the ionic liquid containing cellulose obtained in step (2), and stir to completely dissolve the collagen fibers to obtain an ionic liquid containing cellulose / collagen.

[0033] (4) The ionic liquid containing cellulose / collagen obtained in step (3) was added dropwise into the ethanol-water solution with a concentration of 6% by volume with a syringe, and th...

Embodiment 2

[0037] (1) Collect waste ash and alkali skins from the tanning industry, deash, wash, and grind. Take 20g of minced skin, add it to 800mL of acetic acid solution (1.0% by volume), add 0.25g of pepsin, centrifuge at 4000r / min, take the supernatant and freeze-dry to obtain spongy collagen fibers.

[0038] (2) Dissolve 2.5g of cellulose powder (cellulose content=95%, degree of polymerization=300) in 40g of [Bmim][BF 4 ] in the ionic liquid, heated to 75°C to dissolve the cellulose completely, and obtained the ionic liquid containing cellulose, and cooled.

[0039] (3) Add 0.40 g of the collagen fibers obtained in step (1) to the cellulose-containing ionic liquid obtained in step (2), and stir to completely dissolve the collagen fibers to obtain a cellulose / collagen-containing ionic liquid.

[0040] (4) The ionic liquid containing cellulose / collagen obtained in step (3) was added dropwise into the ethanol-water solution with a concentration of 8% by volume with a syringe, and the...

Embodiment 3

[0043] (1) Collect waste ash and alkali skins from the tanning industry, deash, wash, and grind. Take 10 g of minced skin, add it to 600 mL of acetic acid solution (1.8% by volume), add 0.30 g of pepsin, centrifuge at 2500 r / min and take the supernatant for freeze-drying to obtain spongy collagen fibers.

[0044] (2) Dissolve 2.0g of cellulose powder (cellulose content = 95wt%, degree of polymerization = 300) in 50g of AmimCl ionic liquid, heat to 100°C to completely dissolve the cellulose, obtain ionic liquid containing cellulose, and cool .

[0045] (3) Add 0.12 g of the collagen fibers obtained in step (1) to the ionic liquid containing cellulose obtained in step (2), and stir to completely dissolve the collagen fibers to obtain an ionic liquid containing cellulose / collagen.

[0046] (4) The ionic liquid containing cellulose / collagen obtained in step (3) is scraped with a film scraper, placed in an ethanol-water solution with a concentration of 12% by volume, and the cellu...

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Abstract

The invention discloses a preparation method of a tannin-loaded collagen / cellulose composite biological adsorption material. The method comprises the following steps of dissolving cellulose powder in ion liquid which is adopted as a medium, adding sponge-shaped collagen fibers, dissolving the sponge-shaped collagen fibers, and uniformly mixing the sponge-shaped collage and the cellulose; regenerating and washing the ion liquid containing the cellulose / collagen to obtain a composite material; placing the composite material into an aqueous solution, adding plant tannin, stirring to facilitate the reaction, filtering and washing the unreacted tannin, and adding a cross-linking agent to have reaction; filtering and washing the unreacted cross-linking agent, and freeze drying the reaction product to obtain the tannin-loaded collagen / cellulose composite biological adsorption material. The cellulose is used as a substrate for fixinng little collagen, and the plant tannin is further loaded on the collagen molecules, so that the capacity of the material for adsorbing metal ions can be achieved. Metal ions can be high-efficiently and selectively adsorbed, the stability of the material is also enhanced, and the obtained composite material can be used for treating industrial waste water containing heavy metal ions such as lead and copper.

Description

technical field [0001] The invention relates to the field of a solidified tannin material used for heavy metal ion adsorption, in particular to a collagen / cellulose composite bioabsorption material loaded with tannin and a preparation method thereof. Background technique [0002] Collagen is the most abundant structural protein in animal tissues. It is commonly found in animal skin, bones, cartilage, teeth, tendons, ligaments and blood vessels, and plays a role in supporting organs and protecting the body. The side chain of collagen molecule has a lot of -NH 2 , can load plant tannins, and prepare materials with the ability to adsorb metal ions in aqueous solution (Chinese invention patent: Collagen fiber solidified tannin adsorption material and its preparation method and adsorption and separation of metal ions, patent number: 02134174.5). However, individual collagen fibers also have defects such as easy swelling and deformation when exposed to water, and poor mechanical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 张敏陈礼辉黄六莲曹石林
Owner FUJIAN AGRI & FORESTRY UNIV
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