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Adsorbing material for azide method coupling gelatin and preparation method of adsorbing material

An adsorption material, gelatin technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of slow washing speed, high price, limited durability of adsorption materials, etc., and achieve low pressure loss of filtered water flow and high filtration stability The effect of sex and steric hindrance

Inactive Publication Date: 2015-04-29
KUNMING UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

PVPP resin has evacuated nitrogen-containing five-membered rings and amide bonds, has active sites for specific interaction with tannins, and can selectively adsorb plant polyphenols, but it is limited to polyphenol-rich beverages and is expensive and slow to wash out
The collagen fiber adsorption material disclosed in Chinese patent 02134173.7 utilizes the specific interaction between collagen and tannin molecules to achieve selective adsorption and removal of tannin, but there are problems such as limited supply of animal skin and durability of the adsorption material.
The main problems are: (1) Polyvinyl chloride or its copolymers should be used to pre-prepare polymer resin-based polyazide compounds in the preparation of adsorption materials, and organic solvents should be used in the preparation and coating on the surface of non-woven fabrics; ( 2) The hydrophilicity of the adsorption material is not satisfactory enough
Chinese invention application 201310186790.2 discloses a non-woven fabric surface diazo-coupled gelatin adsorption material and its preparation method, which can effectively remove tannins in water-based solutions and overcome the main problems in Chinese invention patent 2010105597364.4 , but the introduction of aromatic amine groups on non-woven fabrics is realized by the catalytic condensation reaction between carboxyl groups on non-woven fabrics and aromatic diamines. This process has the following problems: (1) N , N, dimethylformamide (DMF) and other organic solvents; (2) It needs to be reacted for several hours at a temperature exceeding 100 °C with a strong acid catalyst; (3) Its coupling and fixation to gelatin is made using diazonium salts It is realized by chemical coupling with gelatin in the solution, and the reaction time of coupling and fixation is long; (4) and the application of the adsorption material only involves the adsorption and removal of tannins in the water-based solution, but does not involve the removal of tannins in the actual product system. The adsorption removal of the adsorption material does not consider the adsorption selectivity of the adsorption material in the multi-component solution

Method used

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  • Adsorbing material for azide method coupling gelatin and preparation method of adsorbing material
  • Adsorbing material for azide method coupling gelatin and preparation method of adsorbing material
  • Adsorbing material for azide method coupling gelatin and preparation method of adsorbing material

Examples

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Effect test

Embodiment 1

[0052] Example 1: The preparation method of the azide coupling gelatin adsorption material based on the carboxyl-diazonium salt electrostatic self-assembly on the surface of the non-woven fabric, the specific operation is as follows:

[0053] (1) Preparation of PP non-woven acrylic acid grafted product

[0054] Refer to the method in the Chinese patent application (application number 201010559722.2) "A high carboxyl content ion-exchange non-woven fabric and its preparation method", the specific operation is as follows:

[0055] A. Cut a batch of circular PP non-woven fabrics with a diameter of 8cm (commercially available, specification: 12.5g / m 2 , thickness 73.8 μm, water absorption rate 52.1%), soak in acetone for 12 hours, remove surface oil and additives and other impurities, take it out and dry it for later use;

[0056] B. Make a mixed solvent of acetone and distilled water according to 50% (volume percentage), add acrylic acid, benzophenone and azobisisobutyronitrile...

Embodiment 2

[0074] Example 2: The preparation method of the azide coupling gelatin adsorption material based on the carboxyl-diazonium salt electrostatic self-assembly on the surface of the non-woven fabric, the specific operation is as follows:

[0075] (1) Preparation of PP non-woven acrylic acid grafted product

[0076] Refer to the method in the Chinese patent application (application number 201010559722.2) "A high carboxyl content ion-exchange non-woven fabric and its preparation method", the specific operation is the same as the step (1) of Example 1, and this example uses polypropylene (PP) For non-woven fabrics, the carboxyl group-containing unsaturated monomer is acrylic acid, and the carboxyl group content Sg of the obtained PP non-woven fabric acrylic acid graft product is 10.3 mmol / g, and its water absorption rate is 485.4%.

[0077] (2) Preparation of p-phenylenediamine monodiazonium salt solution and electrostatic self-assembly of non-woven fabric grafted product and p-phe...

Embodiment 3

[0092] Example 3: The preparation method of the azide coupling gelatin adsorption material based on the carboxyl-diazonium salt electrostatic self-assembly on the surface of the non-woven fabric, the specific operation is as follows:

[0093] (1) Preparation of PP non-woven acrylic acid grafted product

[0094] Refer to the method in the Chinese patent application (application number 201010559722.2) "A high carboxyl content ion-exchange non-woven fabric and its preparation method", the specific operation is the same as the step (1) of Example 1, this example uses polypropylene (PP) For non-woven fabrics, the carboxyl group-containing unsaturated monomer is acrylic acid, and the carboxyl content Sg of the acrylic acid grafted product of the obtained PP non-woven fabric is 10.7 mmol / g, and its water absorption rate is 492.1%.

[0095] (2) Preparation of p-phenylenediamine monodiazonium salt solution and electrostatic self-assembly of non-woven fabric grafted product and p-phen...

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Abstract

The invention discloses an adsorbing material for azide method coupling gelatin and a preparation method of the adsorbing material. The preparation method comprises the following steps: grafting an unsaturated monomer containing carboxyl on the surface of a macromolecular non-woven base material to introduce the carboxyl by employing an ultraviolet induction technology; introducing aromatic amino by employing electrostatic self-assembly of aromatic diamine diazonium salt and the carboxyl, and transforming into an azide group; decomposing into active nitrene under ultraviolet irradiation, fixing gelatin on a non-woven surface through inserting reaction of nitrene; and finally soaking in hot water, and removing uncoupled gelatin to prepare the absorbing material. The adsorbing material is relatively good in hydrophilia; the carrier content and the water absorption rate of the gelatin can be adjusted within a large range; and the adsorbing material has relatively high adsorption capacity on tannin, has a selective absorption effect on adsorption of the tannin in green tea and emblic leafflower fruit extracts, and also has the selective absorption effect on condensed tannin in the green tea extract.

Description

Technical field [0001] Background technique [0002] [0003] [0004] [0005] 60 [0006] [0007] [0008] [0009] Invention content [0010] [0011] [0012] [0013] [0014] [0015] [0016]Methods to handle non-woven fabrics, unsaturated monomers containing carboxyls, and light / thermal causes in accordance with the method applied for the Chinese invention (application number 2010110559722.2).The surface of the texture containing the carboxyl -based unsaturated monomer of the woven -induced branches and the purification of branches and branches is used, and then the carboxyl content and water absorption rate are determined by the backdrop determination method, and the FTIR and SEM representations are performed; [0017] The non-woven fabric is a synthetic or natural polymer non-woven fabric, such as polypropylene, that is, PP non-woven fabric, ethylene-acryline cluster, EP non-woven fabric, polyethylene, PE non-woven fabric, polyester, or PBT noneWoven, polyami...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/265
Inventor 唐辉张晓春
Owner KUNMING UNIV OF SCI & TECH
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