Multilayer nano-composite resin, preparation method and application of multilayer nano-composite resin in dye wastewater

A nano-composite and resin technology, applied in the fields of energy and wastewater treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of difficult separation, small size, easy agglomeration, etc., achieve high research value, simple and convenient reaction process, structure novel effect

Active Publication Date: 2021-06-15
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, D113 is a macroscopically visible opaque light yellow spherical particle. Compared with MOF, its specific surface area still has a lot of room for improvement; as a nano-scale material, MOF is small in size, so it is easy to agglomerate and difficult to separate. There is still a lot of room for technological improvement in terms of material types, maximum adsorption capacity, adsorption stability, and separation operations.

Method used

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  • Multilayer nano-composite resin, preparation method and application of multilayer nano-composite resin in dye wastewater
  • Multilayer nano-composite resin, preparation method and application of multilayer nano-composite resin in dye wastewater
  • Multilayer nano-composite resin, preparation method and application of multilayer nano-composite resin in dye wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] D113 is a polyacrylic acid type weak acid resin based on allyl itaconate and divinylbenzene as a secondary crosslinking agent. Good-quality D113 resin has a neat spherical appearance, uniform milky white, high strength, generally not easy to break, no abnormal particles, no impurities, basically no cracked balls, and the spherical rate is 100%. D113 shows excellent separation and enrichment performance, and it is low in cost, large in adsorption capacity, good in strength, and can be used repeatedly. In the swollen state, D113 has both the gaps between the polymer chains and the macropores (several to hundreds of nanometers) produced by the porogen during synthesis; although the gaps between the chains disappear after dehydration, the macropores can still be reserved. D113 is suitable for the selective adsorption and separation of various heavy metal ions due to its stable skeleton structure, rich surface functional groups, adjustable pore structure, and large adsorpti...

Embodiment 2

[0034] This example provides a method for preparing multilayer nanocomposite resin Co-MOF-D113-10, the process steps are:

[0035] (1) Raw material pretreatment: soak and swell the ion exchange adsorption resin in distilled water for more than 24 hours, wash with deionized water and suction filter to obtain the pretreatment resin;

[0036] (2) Preparation of 2-MI / D113: Add the pretreated resin prepared in step (1) to the 2-methylimidazole solution, add a magnet at room temperature and stir for 30min to 2h. Repeated washing with absolute ethanol and deionized water, suction filtration and drying to obtain 2-MI / D113 resin.

[0037] (3) Preparation of Co-MOF / D113-1: add the pretreated resin obtained in step (2) to cobalt acetate solution, and react at room temperature. Water was washed repeatedly, suction filtered and dried to obtain Co-MOF / D113-1 resin.

[0038] (4) Take the product of step (3), and then repeat (2) (3) step 9 times to obtain the product Co-MOF / D113-10. After t...

Embodiment 3

[0052] In this example, the nanocomposite resin of the above example is used in the separation and adsorption experiment of rhodamine B. The results show that the Co-MOF / D113-10 resin has excellent adsorption selectivity for rhodamine B, and the adsorption capacity is large. About 303.7mg / g, refer to the structure after adsorption of Rhodamine B Figure 4 hint.

[0053] The material can be applied to the adsorption of organic cation RB in the environment or food. In various printing and dyeing wastewater containing organic cation RB, rhodamine B can be recognized and adsorbed by the nanocomposite resin described in claim 1 to form complex ions or complexes. The specific adsorption process is:

[0054] Take 50mg of Co-MOF / D113-10 and add it to a 250mL iodine flask, add 25mL of 0.2mol / LHAc-NaAc buffer solution with a pH of 2 to 7 to swell for 12h, then add 5mL of 2000ppm rhodamine B standard stock solution, at 15 Under the temperature of ℃~35℃, use a constant temperature oscil...

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Abstract

The invention discloses multilayer nano composite resin Co-MOF-D113-10, a preparation method and application, D113 is taken as a matrix, dimethylimidazole and cobalt acetate are taken as D113 precursors, the nano composite resin is synthesized by adopting a layer-by-layer self-assembly method, and the layer-by-layer self-assembly is 10 times of wrapping. The multilayer nano composite resin Co-MOF-D113-10, preparation method and application have the beneficial effects that macroscopic and microcosmic materials are combined to form the nano composite material with excellent performance; the reaction process is simple, convenient and green; the Co-MOF-D113-10 material disclosed by the invention is novel in structure and has a very high research value; the adsorption effect of the material on rhodamine B is better than that of the prior art; and the Co-MOF-D113-10 material has high adsorption stability and reusability, and can be applied to adsorption and purification of rhodamine B in printing and dyeing wastewater.

Description

technical field [0001] The invention relates to the technical field of composite material synthesis, in particular to a multilayer nanocomposite resin Co-MOF-D113-10 combined with a weak acid type ion exchange adsorption resin and a metal organic framework compound, a preparation method and application. Background technique [0002] Rhodamine B (RhodamineB, RB) is a synthetic xanthene dye, green luster crystal or reddish-purple powder, easily soluble in water and alcohol, its solution is blue-red, dilute solution has strong fluorescence; slightly soluble In hydrochloric acid and sodium hydroxide solution, there is a risk of carcinogenicity. Rhodamine B can poison people through the skin. It can produce toxicity and penetrate the skin at high concentrations. After poisoning, symptoms such as headache, sore throat, vomiting, abdominal pain, and sore limbs will appear. Erythema or red dots can appear. [0003] At present, MOF has become an important research direction in many...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30
CPCB01J20/226C02F1/285C02F2101/308Y02W10/37
Inventor 王小青樊千雨孙娟韩小瑜郑潘婷熊春华
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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