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Preparation method and application of hydrophobization beta-cyclodextrin cation polyelectrolyte

A cationic poly-cyclodextrin technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve problems such as difficult structure of modified products, limited modification scale, impact on flocculation performance, etc., achieves fast decolorization rate and small environmental pollution , Good salt tolerance

Inactive Publication Date: 2013-09-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, microbial flocculants are formed in the medium, and their flocculation performance is greatly affected by the environment and growth cycle.
Natural polymers such as starch have a variety of physical and chemical properties (such as molecular weight and degree of branching) due to their different origins, sources, and even production cycles, which makes it difficult to precisely control the structure of their modified products. Modification scale is limited

Method used

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  • Preparation method and application of hydrophobization beta-cyclodextrin cation polyelectrolyte
  • Preparation method and application of hydrophobization beta-cyclodextrin cation polyelectrolyte
  • Preparation method and application of hydrophobization beta-cyclodextrin cation polyelectrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add 1 part of maleic anhydride (MAH), 2.32 parts of β-CD and 33 parts of N,N-dimethylformamide (DMF) into a three-neck flask equipped with mechanical stirring and a nitrogen conduit. Stir at 80°C for 10 hours. After the reaction, cool to room temperature, add 66 parts of chloroform, and vacuum filter to obtain a white precipitate, then wash with acetone, repeat several times, and dry in a vacuum oven at 50°C for 24 hours to obtain a polymerizable β-CD- MAH.

[0037] (2) Add 45 parts of β-CD-MAH, 50 parts of DAC, 5 parts of styrene and 400 parts of deionized water into a three-neck flask equipped with magnetic stirring, condenser and nitrogen gas conduit, and pass through nitrogen. Raise the temperature to 55°C, wait until β-CD-MAH, DAC, and St are mixed evenly, and add 0.45 parts of K 2 S 2 o 8 , 0.17 part NaHSO 3 . Nitrogen flow was continued, and the reaction was incubated for 4 hours. The reaction system was cooled to room temperature, 800 parts of acetone...

Embodiment 2

[0040] (1) Add 1 part of maleic anhydride (MAH), 2.32 parts of β-CD and 33 parts of N,N-dimethylformamide (DMF) into a three-neck flask equipped with mechanical stirring and a nitrogen conduit. Stir at 80°C for 10 hours. After the reaction, cool to room temperature, add 66 parts of chloroform, and vacuum filter to obtain a white precipitate, then wash with acetone, repeat several times, and dry in a vacuum oven at 50°C for 24 hours to obtain a polymerizable β-CD- MAH.

[0041] (2) Add 50 parts of β-CD-MAH, 45 parts of DAC, 5 parts of styrene and 400 parts of deionized water into a three-neck flask equipped with magnetic stirring, condenser and nitrogen gas conduit, and pass through nitrogen. Raise the temperature to 55°C, wait until β-CD-MAH, DAC, and St are mixed evenly, and add 0.45 parts of K 2 S 2 o 8 , 0.17 part NaHSO 3 . Nitrogen flow was continued, and the reaction was incubated for 4 hours. The reaction system was cooled to room temperature, 800 parts of acetone...

Embodiment 3

[0044] (1) Add 1 part of maleic anhydride (MAH), 2.32 parts of β-CD and 33 parts of N,N-dimethylformamide (DMF) into a three-neck flask equipped with mechanical stirring and a nitrogen conduit. Stir at 80°C for 10 hours. After the reaction, cool down to room temperature, add 66 parts of chloroform, vacuum filter to obtain a white precipitate, wash with acetone, repeat several times, and dry in a vacuum oven at 50°C for 24 hours to obtain a polymerizable β-CD derivative (β-CD-MAH).

[0045] (2) Add 57 parts of β-CD-MAH, 40 parts of DAC, 3 parts of styrene and 400 parts of deionized water into a three-neck flask equipped with magnetic stirring, condenser and nitrogen gas conduit, and pass through nitrogen. Raise the temperature to 45°C, wait until β-CD-MAH, DAC, and St are mixed evenly, and add 0.45 parts of K 2 S 2 o 8 , 0.17 part NaHSO 3 . Nitrogen flow was continued, and the reaction was incubated for 4 hours. The reaction system was cooled to room temperature, 800 par...

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Abstract

The invention discloses a preparation method and an application of hydrophobization beta-cyclodextrin cation polyelectrolyte. In a water phase, three monomers, namely polymerizable beta-cyclodextrin derivatives, acryloyl oxyethyl trimethyl ammonium chloride and styrene, are subjected to a free radical copolymerization reaction under an oxidation / reduction (potassium peroxodisulfate / sodium hydrogen sulphite) initiating system to obtain the hydrophobization beta-cyclodextrin cation polyelectrolyte product. The hydrophobization beta-cyclodextrin cation polyelectrolyte product is white powder solids and is stable in structure and convenient to store and transport, hydrophilcity is reduced and better solubility is still maintained; the preparation method of the hydrophobization beta-cyclodextrin cation polyelectrolyte product is simple, and low in energy consumption; no other auxiliaries such as a surface active agent is added in an aqueous solution polymerization process, and environmental pollution is less; and the hydrophobization beta-cyclodextrin cation polyelectrolyte product can serve as a novel flocculating agent for decoloration, the specific structure of beta-cyclodextrin (beta-CD) is reserved, toxicity and cost are low, flocculation capacity is strong, decoloration speed is high, an applicable pH range is wider (2-12), and salt tolerance is high.

Description

technical field [0001] The invention belongs to the field of solution polymerization, and in particular relates to a preparation method and application of a hydrophobic β-cyclodextrin-based cationic polyelectrolyte. Background technique [0002] At present, the effective way to treat printing and dyeing wastewater is to first undergo physical and chemical pretreatment to remove biological toxicity, and then achieve the purpose of comprehensive treatment through biological treatment. Dyes are one of the main reasons for the high chroma, high biological toxicity and difficult treatment of printing and dyeing wastewater. Not only do they have a specific color, but they are also complex in structure and do not biodegrade readily or very slowly. In addition, aromatic rings, nitro groups, amine groups, and heavy metals such as copper and chromium in the dye structure are potentially harmful to human health and animal and plant development; colored wastewater is unsightly, hinders...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/10C08F220/34C08F212/08C08B37/16C02F1/56
Inventor 田秀枝蒋学任二辉王树根
Owner JIANGNAN UNIV
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