Material of non-woven fabric surface heavy nitrogen coupling gelatin adsorbing material and preparation method thereof

Abstract

The invention discloses a non-woven fabric surface heavy nitrogen coupling gelatin adsorbing material and a preparation method thereof. The method comprises the following steps of: grafting an unsaturated monomer with carboxy to the surface of a macromolecule non-woven fabric base material by using an ultraviolet induction technique so as to introduce the carboxy; furthermore introducing aromatic amine through catalytic condensation of aroma diamine and carboxy; subsequently, converting the aromatic amine into diazo salt; coupling and immobilizing the gelatin on the surface of the non-woven fabric through diazo coupling reaction; and finally, soaking in hot water and eliminating the uncoupled gelatin so as to prepare the non-woven fabric surface diazo coupling gelatin absorbing material. The absorbing material is good in hydrophilicity, namely, the water absorption rate is greater than 292.3%; the solid load and the absorption rate of the gelatin can be adjusted in a large range, the absorbing material has high absorption capability for tannin; and when the tannin concentration is 200-400mg/L, the balance absorption capacity is within 16.8-53.2mg/g, and the absorption balance can be achieved within 3 hours.

Description

technical field [0001] The invention relates to an adsorption material for diazo-coupling gelatin on the surface of a non-woven fabric and a preparation method thereof, belonging to the field of adsorption and separation. Background technique [0002] Tannin and its derived fulvic acid and humic acid are organic by-products of natural fermentation of plant tissues, which are widely present in water bodies near swamps, depressions and coasts, as well as in water flowing through peat soil and decaying vegetation, although there is no significant health hazard , but it will cause the water to have a yellow-brown smudge and stain the washed fabrics, utensils and supplies. It will also give the water a strong burnt and earthy smell and affect the visual appearance of the water. In addition, tannins can also enter into plant-based aqueous products such as juices, wines, and herbal extracts and cause bitterness, turbidity, precipitation, and harmful effects after ingestion or injec...

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.

Chinese invention application 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 made of non-woven fabric has a certain influence on the adsorption and filtration properties

The main problems are: (1) Sodium azide, a dangerous reagent, needs to be used in the preparation of polymer azide compounds; (2) Organic solvents are required for the dissolution of polymer resin-based polyazide compounds; (3) The affinity of adsorption materials Not enough water

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