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A kind of diazonium method coupled gelatin adsorption material and preparation method thereof

An adsorption material, a technology of diazonium method, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of slow washing speed, high price, influence of adsorption and filtration properties, etc. Achieve the effect of low filtration water flow pressure loss, high filtration stability, and small steric hindrance

Inactive Publication Date: 2016-09-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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.
Chinese invention patent 2010105597364.4 discloses a non-woven surface covalently bonded gelatin adsorption material, which can effectively remove tannins in water, but the preparation requires the use of sodium azide and polymer resin-based polyazide compounds, and the use of hydrophobic The adsorption material prepared by non-woven fabric has a certain influence on the adsorption and filtration properties
The main problems are: (1) the dangerous reagent sodium azide needs to be used in the preparation of polymer polyazide compounds; (2) the dissolution of polymer resin-based polyazide compounds requires the use of organic solvents; (3) the absorption of adsorption materials Hydrophilicity is not satisfactory
Chinese invention application 201310186790.2 discloses a diazo-coupled gelatin adsorption material on the surface of non-woven fabrics 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 its aromatic amine group on the non-woven fabric is realized by the catalyzed condensation reaction of the pre-introduced carboxyl and aromatic diamines on the non-woven fabric. This technique has derived the following problems: (1) need to use N , N, dimethylformamide (DMF) and other organic solvents; (2) need a strong acid catalyst, more than 100 0 After several hours of reaction at a temperature of C; (3) 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 adsorption and removal of tannins in the actual product system, and does not consider the adsorption materials Adsorption selectivity in multicomponent solutions

Method used

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  • A kind of diazonium method coupled gelatin adsorption material and preparation method thereof
  • A kind of diazonium method coupled gelatin adsorption material and preparation method thereof
  • A kind of diazonium method coupled gelatin adsorption material and preparation method thereof

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Embodiment 1

[0056] Embodiment 1: the preparation method of the diazo method coupled gelatin adsorption material based on carboxyl-diazonium salt electrostatic self-assembly on the surface of non-woven fabric, the specific operations are as follows:

[0057] (1) Preparation of PP non-woven acrylic acid grafted product

[0058] 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:

[0059] 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;

[0060] B. Make a mixed solvent of acetone and distilled water according to 50% (volume percentage), add acrylic acid, benzophenone and azobisisobutyronitril...

Embodiment 2

[0078] Embodiment 2: the preparation method of the diazo method coupled gelatin adsorption material based on the carboxyl-diazonium salt electrostatic self-assembly on the surface of the non-woven fabric, the specific operations are as follows:

[0079] (1) Preparation of PP non-woven acrylic acid grafted product

[0080]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-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 8.9mmol / g, and its water absorption rate is 365.4%.

[0081] (2) Preparation of p-phenylenediamine monodiazonium salt solution and electrostatic self-assembly of non-woven fabric grafted product and p-...

Embodiment 3

[0095] Embodiment 3: the preparation method of the diazo method coupled gelatin adsorption material based on carboxyl-diazonium salt electrostatic self-assembly on the surface of non-woven fabric, the specific operation is as follows:

[0096] (1) Preparation of PP non-woven acrylic acid grafted product

[0097] 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) Non-woven fabric, carboxyl group-containing unsaturated monomer is acrylic acid, the carboxyl content Sg of the obtained PP non-woven fabric acrylic acid graft product is 10.7mmol / g, and its water absorption rate is 472.1%.

[0098] (2) Preparation of p-phenylenediamine monodiazonium salt solution and electrostatic self-assembly of non-woven fabric grafted product and p-phenylenediamine monodia...

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Abstract

The invention discloses a diazonium method coupling gelatin adsorption material and a preparation method thereof. The preparation method is characterized by comprising the following steps: grafting a carboxylic unsaturated monomer to the surface of a high-molecular non-woven fabric substrate by adopting an ultraviolet induction technology to introduce carboxyl; then introducing aromatic amido by utilizing the static self assembly of aromatic diamine monomeric diazonium salt and the carboxyl, then transforming the aromatic amido into diazonium salt, then coupling and fixing gelatin on the surface of a non-woven fabric through diazo coupling reaction; finally removing uncoupled gelatin through the soaking of hot water to prepare the diazonium method coupling gelatin adsorption material. The diazonium method coupling gelatin adsorption material disclosed by the invention is preferable in hydrophilia and adjustable in gelatin supported quantity and water absorption rate within a large range, has strong adsorption capacity on tannin and selective adsorption effect on the tannin contained in green tea and emblic leafflower fruit extracts, and can achieve the adsorption quantity for hydrolysable tannin and condensed tannin which are contained in the green tea extract as high as 5.5 mg / g and 18.5 mg / g, thus showing the selective adsorption effect on the condensed tannin contained in the green tea extract.

Description

technical field [0001] The invention relates to a diazo method coupling gelatin adsorption material and a preparation method thereof, in particular to a diazo method coupling gelatin adsorption material based on carboxyl-diazonium salt electrostatic self-assembly on the surface of a non-woven fabric and a preparation method thereof, belonging to adsorption separate fields. Background technique [0002] Molecular assembly is a technology for building materials at the molecular level, which originated in biological systems. The intermolecular layer-by-layer assembly technology was first proposed by Decher et al. in 1991. This is a film-forming technology that can control the composition, size and shape of the film. The driving force of molecular assembly mainly includes electrostatic force, hydrogen bond, covalent bond, coordination bond and halogen bond. Among them, molecular self-assembly driven by electrostatic force is the most common. It realizes molecular self-assembly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/264B01J20/28011B01J20/3028B01J2220/4812
Inventor 唐辉张晓春
Owner KUNMING UNIV OF SCI & TECH