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Non-woven surface covalent bonding gelatin adsorption material and preparation method thereof

A surface covalent and adsorption material technology, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of slow washing speed, high price, limited durability of materials, etc., and achieve low column resistance, Simple manufacturing process and wide range of effects

Inactive Publication Date: 2011-05-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVPP resin has evacuated nitrogen-containing five-membered rings and amide bonds, and has active sites for specific interaction with tannins, which can selectively adsorb plant polyphenols, but only limited to polyphenol-rich beverages, not suitable for protein-rich beverages Drinks, expensive and slow to rinse
The collagen fiber adsorption material disclosed in Chinese patent 02134173.7 uses the specific interaction between collagen and tannin molecules to achieve selective adsorption and removal of tannin, but there are problems such as limited animal skin supply and material durability.

Method used

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  • Non-woven surface covalent bonding gelatin adsorption material and preparation method thereof
  • Non-woven surface covalent bonding gelatin adsorption material and preparation method thereof
  • Non-woven surface covalent bonding gelatin adsorption material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Preparation and refining of embodiment 1 (1) polyepichlorohydrin (PECH)

[0035] A three-neck flask equipped with a mechanical stirrer, a nitrogen conduit, and a condenser was installed in a water bath. Add 4 mL of refined 1,2-dichloroethane and 0.4 mL of 1,2-propanediol in sequence, start stirring and blow dry nitrogen. 0.5 mL of anhydrous SnCl 4 Inject it under the liquid surface, and then add 65mL of epichlorohydrin (ECH) dropwise within 40min. The polymerization reaction was stirred at 30° C. for 24 h. After the reaction is completed, add 40-50 mL of dichloromethane for dilution, transfer to a separatory funnel and wash with 5% hot brine for several times until the water phase is neutral in pH. After static separation, the lower organic phase was placed in a beaker with molecular sieves, and dried in a silica gel desiccator for 24 hours. Then it was filtered, and the filtrate was distilled under reduced pressure in an oil bath at 150°C for 1 h to remove volatile...

Embodiment 2

[0038] Example 2: Put 8 g of sodium azide and 0.17 g of tetrabutylammonium bromide into a beaker, add 25.3 mL of distilled water to dissolve to obtain an aqueous solution of sodium azide.

[0039] Add 0.2 g of polyvinyl chloride (commercially available type 5) into a three-necked flask, add 16.7 mL of the above sodium azide aqueous solution, stir and react in an oil bath at 80 ° C for 4 h, then wash and filter with a large amount of distilled water and 10 mL of methanol respectively, and the filter residue is It is a crude product of azide polyvinyl chloride. The crude product was first dissolved in 10 mL of tetrahydrofuran, then precipitated with 30 mL of methanol, and then suction-filtered, repeated three times and dried in the air to obtain the purified azide product, which was stored in a refrigerator at 5°C in the dark for future use. Its FTIR spectrum is shown in figure 2 Spectrum line 2, the characteristic absorption is consistent with the literature value, the FTIR s...

Embodiment 3

[0040] Embodiment 3: repeat embodiment 2 and only change polyvinyl chloride into vinyl chloride resin (commercially available CM1133 type), its FTIR spectrogram is shown in image 3 Spectrum line 1, the characteristic absorption is consistent with the literature value, and the FTIR spectrum of vinyl acetate resin is shown in image 3 Spectrum 2.

[0041] From the FTIR spectrogram ( Figure 1-Figure 3 In spectral line 2), it can be found that the azidation reaction does not affect the characteristic absorption of the main chain structure of the chlorine-containing polymer resin, only making 700-750.0cm -1 attributable to CH 2 The strong stretching vibration peak of -Cl disappears or weakens, while at 2100-2112cm -1 There is a strong attribution to -N 3 The absorption peak of the asymmetric stretching vibration of the group, the reduction of the chlorine atom and the appearance of the azide characteristic peak confirm that the azide group has replaced the chlorine, -N 3 It ...

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Abstract

The invention discloses a method for preparing a novel adsorption material by covalent bonding gelatin on the surface of a non-woven fabric, comprising the following steps of, with a synthetic or nature high polymer non-woven fabric (such as PP (Propene Polymer), PET (Polyester Terephthalate), cellulose and the like) as a substrate, dip-coating the synthetic or nature high polymer non-woven fabric with a polyazide solution to form an activated non-woven fabric substrate, and dip-coating a gelatin solution on the activated non-woven fabric substrate; and utilizing ultraviolet irradiation to photolyze an azide group to form active nitrene, covalently bonding gelatin molecules on the surface of the non-woven fabric through insertion reaction of the active nitrene, and generating partial crosslinking, and finally, removing unbonded or uncrosslinked gelatin by soaking with cold or hot water to prepare the adsorption material. The adsorption material prepared by the method disclosed by the invention has stronger adsorption capacity to tannin, has the balance adsorption capacity of 59.5-134.2mg / g and can reach adsorption balance through about 3h.

Description

technical field [0001] The invention relates to a preparation method of a fibrous adsorption material covalently bonded with gelatin on the surface of a non-woven fabric and its adsorption and separation of tannins. Background technique [0002] Tannin, also known as plant polyphenol, is a chemical component in plants. It has a special smell, extremely astringent taste, and has certain biological toxicity. Excessive tannin in food will inhibit the activity of digestive enzymes and reduce the body's ability to absorb vitamins, minerals and Absorption of protein, causing gastroenteritis, gastrointestinal congestion and liver damage. The tannin contained in the injection will seriously affect its safety and stability, which will cause coagulation of protein in the blood, causing redness and swelling at the injection site of the patient, and in severe cases, it can cause arrhythmia, induce and aggravate heart failure and cause death; drugs containing tannin It often causes naus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01J20/28
Inventor 唐辉王莉莉张晓春
Owner KUNMING UNIV OF SCI & TECH
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