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Graft modified polymer material and preparation method thereof

A polymer material and graft modification technology, applied in the field of graft modified polymer material and its preparation, can solve the problems that the treatment method cannot meet the drinking water standard and fishery water standard, and the removal lower limit concentration is high, and achieves rapid adsorption. , high selectivity, economical effect

Inactive Publication Date: 2011-05-04
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to provide a mercury ion adsorption material and Preparation method thereof and method for removing mercury ions

Method used

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  • Graft modified polymer material and preparation method thereof
  • Graft modified polymer material and preparation method thereof
  • Graft modified polymer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 5g polyethylene non-woven fabric (average pore size is 2.3 microns) is irradiated to 30kGy by gamma rays produced by a cobalt source in an air atmosphere, and 20wt% glycidyl methacrylate and 2wt% Tween 20 are formulated into an emulsion in water , the irradiated thickness is 50 microns, and the polyethylene non-woven fabric with a size of 5 × 5 cm is immersed in 200 ml of emulsion, and under nitrogen protection conditions, the temperature is raised to 60 ° C for 4 hours to obtain a graft rate of 90%. Modified non-woven PE-g-PGMA. The modified non-woven fabric PE-g-PGMA of gained is immersed in the DNA single strand 5 ' (NH of 0.005mmol / L of 200ml 2 )-TTCTTTCTTCCCCTTTGTTTGTT-3' in the water and ethanol mixed solution (the volume ratio of water and ethanol is 3 / 1), add 1mol / L sodium hydroxide aqueous solution to adjust the pH value to 7.5, heat up to 70 ° C, and react for 4 hours to obtain 5'(NH 2 )-TTCTTTCTTCCCCTTTGTTTGTT-3' structure of the modified non-woven fabric, ...

Embodiment 2

[0040] Irradiate 10g of polyvinylidene fluoride powder (the average particle size of the powder is about 0.1mm) to 15kGy in an air atmosphere using γ-rays generated by a cobalt source, add 10mL of glycidyl methacrylate, 1mL of Tween 20, and 100mL of water Prepare an emulsion, add 10 g of irradiated PVDF powder into the emulsion, heat to 60° C. for 6 hours under nitrogen atmosphere, and obtain PVDF-g-PGMA powder with a grafting rate of 95%. Prepare 150mmol / L DNA single strand 5'(NH 2 )-CTTTCCTTCA water and dioxane mixed solution (water and dioxane volume ratio is 2: 1), the PVDF-g-PGMA powder of gained is immersed in this mixed solution of 100ml, add 1mol / L hydrogen Sodium oxide aqueous solution adjusted the pH value to 9.0, raised the temperature to 60°C and reacted for 4 hours to obtain DNA containing single-stranded 5'(NH 2 )-CTTTCCTTCA structure polyvinylidene fluoride powder. The DNA single-strand content was calculated to be 8.1wt% by nitrogen content determination.

Embodiment 3

[0042] Immerse 5g of polystyrene porous microspheres (the average pore diameter of micropores is 1.7 μm) in 100ml of 30wt% glycidyl methacrylate methanol solution, seal the reaction vessel after 30min of nitrogen gas to remove oxygen, and put it into the cobalt 60 source chamber The modified porous microsphere PS-g-PGMA with a grafting rate of 55% was obtained by medium irradiation of 30kGy. The resulting modified porous microsphere PS-g-PGMA was immersed in 100ml of 0.001mmol / L DNA single-stranded NH 2 -In the aqueous solution of TTCTTTCCCCTTTGTT, adjust the pH value to 8.0 with 1mol / L NaOH aqueous solution, and react at 50°C for 12 hours to obtain 2 - Modified porous microspheres of TTCTTTCCCCTTTGTT structure. The DNA single strand content was deduced to be 3.6wt% by nitrogen content determination.

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Abstract

The invention discloses a graft modified polymer material, a polymer material adsorbing mercury ions prepared from the same and a preparation method thereof. The graft modified polymer material is prepared by grafting a polymer substrate P to a monomer A or monomer B, wherein the molecular structure of the monomer A comprises at least one C=C double bond and at least one epoxy group; and the molecular structure of the monomer B comprises at least one C=C double bond and at least one anhydride group. The epoxy group or anhydride group on the surface of the graft modified polymer material reacts with the terminal amino of a DNA (Deoxyribonucleic Acid) single strand with an amino-modified terminal to obtain the polymer material adsorbing mercury ions. The preparation process of the invention is simple; the prepared material can adsorb mercury ions with high selectivity; the lower limit on concentration for removing mercury ions is extremely low; and the invention has good application prospects in terms of drinking water treatment, industrial wastewater advanced treatment, recycling of mercury ions, and the like.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a graft modified polymer material and a preparation method thereof. Background technique [0002] Mercury is a widely distributed heavy metal, and its existence forms include elemental mercury, inorganic mercury salts and organic mercury. Among them, inorganic mercury salts widely exist in soil and water, and dietary intake, dermatological preparations and cosmetics are the main sources of inorganic mercury salts in the human body. Ingestion of inorganic mercury salts can cause kidney failure and gastrointestinal damage, and mercury ions can accumulate in the body. Therefore, my country's "Drinking Water Hygienic Standard" (GB5749-85) stipulates that the concentration of mercury ions should be lower than 1 μg / L, which is more stringent than some toxins such as arsenic, cadmium, lead, and cyanide. The drinking water standard in Japan requires the concentration of mercury ions to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/00B01J20/26B01J20/30C08F8/40
Inventor 李景烨樊春海虞鸣张伯武裴昊邓波李林繁
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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