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Nanometer clay-containing high absorptive hydrogel as well as preparation method and application thereof

A nanoclay, high adsorption technology, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, other chemical processes, etc., to achieve high practical value, simple preparation method, strong adsorption and removal effect

Inactive Publication Date: 2011-01-12
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the above analysis, it can be seen that hydrogel, clay minerals, natural organic polymers and their derivatives all have good adsorption effects on dyes. However, using gel as a carrier, the inorganic nano-clay and water-soluble natural polymer phase Quite few reports have been reported for the adsorption of ionic dyes in conjunction with

Method used

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  • Nanometer clay-containing high absorptive hydrogel as well as preparation method and application thereof
  • Nanometer clay-containing high absorptive hydrogel as well as preparation method and application thereof
  • Nanometer clay-containing high absorptive hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 1.0g of isopropylacrylamide, 0.01g of methylenebisacrylamide, 0.09g of laponite, and 0.05g of starch into 11mL of deionized water in sequence, and in a sealed container at 20°C, blow nitrogen into it, and stir for 50min until Completely disperse to form a homogeneous solution; cool the above mixed solution to 3°C with ice cubes, add 0.01 g of ammonium persulfate after 30 minutes, and inject 100 μL of N, N, N'N'-tetramethylethylenediamine after 10 minutes, under nitrogen protection, Continue to stir for 10 minutes until the mixed solution starts to appear viscous; immediately pour the viscous mixed solution into a glass mold with a thickness of 2mm, leave it at 25°C for a sealed reaction for 24 hours, and then soak the reaction product in deionized water After 2 weeks, the purified hydrogel was obtained; the purified hydrogel was dried for 25 hours in a blast drying box at 30°C, and then placed in a water-soluble cationic dye crystal violet solution with a mass concen...

Embodiment 2

[0049] Add 1.0g of acrylamide, 0.05g of methylenebisacrylamide, and 0.05g of sauconite to 10mL of deionized water in sequence, and in a sealed container at 20°C, blow nitrogen into it, and stir for 40min until completely dispersed to form a uniform solution; Cool the above mixed solution to 1°C with ice cubes, add 0.01g of potassium persulfate after 30 minutes, inject 50 μL of sodium bisulfite after 10 minutes, and continue to stir for 10 minutes under the protection of nitrogen until the mixed solution begins to appear viscous; Immediately pour the mixed solution into a glass mold with a thickness of 2 mm, leave it at 20°C for a sealed reaction for 30 hours, and then soak the reaction product in deionized water for 2 weeks to obtain a purified hydrogel; the purified hydrogel The gel was dried for 30 hours in a blower drying box at 25°C, and then placed in a water-soluble anionic dye methyl orange solution with a mass concentration of 10%. After 10 hours, the high-adsorption hy...

Embodiment 3

[0051] Add 1.0g of diethylacrylamide, 0.10g of lithium magnesium silicate, and 0.05g of sodium alginate to 11mL of deionized water in sequence, and in a sealed container at 20°C, pass in nitrogen gas and stir for 45min until completely dispersed to form a homogeneous solution; Cool the above mixed solution to 2°C with ice cubes, add 0.02 g of potassium persulfate after 30 min, inject 80 μL of N, N, N'N'-tetramethylethylenediamine after 10 min, and continue to stir for 10 min under nitrogen protection until mixed The solution began to appear viscous; the viscous mixed solution was immediately poured into a glass mold with a thickness of 2mm, left to stand at 28°C for a sealed reaction for 16 hours, and then the reaction product was soaked in deionized water for 2 weeks to obtain purified The hydrogel; the purified hydrogel is placed in a blast drying air box at 20°C for 35 hours, and then placed in a water-soluble cationic dye toluidine blue solution with a mass concentration of...

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Abstract

The invention relates to a nanometer clay-containing high absorptive hydrogel as well as a preparation method and application thereof. The hydrogel contains an acrylamide monomer M1, a chemical crosslinking agent M2, inorganic nanometer clay M3 and a water soluble biopolymer M4 with use level of 98-50:0-10:2-25:015 in mass percent. The preparation method comprises the following step of: taking M3 as a filler or a reinforcing agent or a physical crosslinking agent and taking M4 as a second component in a water solution to prepare the environmentally-friendly hydrogel with high water soluble dye adsorption property and excellent mechanical property. The method has the advantages of simple and reliable preparation process, no environmental pollution, very strong dye adsorption removal effects and practicability; and the dye adsorption quantity can be adjusted by temperature, pH value, crosslinking degree, dye concentration, nanometer clay or biopolymer variety and use level and a reactant charge ratio. The hydrogel can be used for the fields of weaving and dyeing wastewater treatment, dye adsorption, and the like.

Description

technical field [0001] The invention relates to the fields of environmental protection and intelligent polymer materials, in particular to a highly absorbent hydrogel containing nanoclay and its preparation method and application. Background technique [0002] With the development of the economy and the rapid growth of the population, a large amount of domestic wastewater and industrial wastewater are discharged into the water body, causing a series of problems. Fluoride pollution, water eutrophication and pollution from dye wastewater are the most common. Dye wastewater is very harmful. Even if the dye wastewater with a very low concentration is discharged into the water body, the light transmittance of the water body will decrease, which may lead to the destruction of the water body ecosystem, which has aroused people's attention to dye pollution. These dye molecules or their metabolites may be highly toxic, potentially carcinogenic, or even mutagenic or sensitizing in ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L33/24C08L3/02C08L1/26C08L5/04C08L5/08C08L99/00C08L89/00C08K3/34C08F220/56C08F220/54C08F220/58C08F2/44C08J3/075B01J20/26B01J20/30C02F1/28C02F1/62C02F103/30
Inventor 张青松陈莉赵义平董盼盼马静李洪春
Owner TIANJIN POLYTECHNIC UNIV
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