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Chitosan grafted hyperbranched polymer polyamide-amine (PAMAM), and preparation method and application thereof

A technology of hyperbranched polymer and polyamidoamine, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problems of phosphorus pollution, low scale inhibition efficiency, etc. The effect of biodegradation, good antibacterial effect, excellent flocculation and scale inhibition effect

Active Publication Date: 2015-11-11
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of phosphorus pollution and low scale inhibition efficiency caused by prior art scale inhibitors, the first purpose of the present invention is to provide a chitosan grafted hyperbranched polymer polyamidoamine, which is used for scale inhibitors, Does not contain phosphoric acid groups, avoiding phosphorus pollution; the product is a first-generation polyamidoamine with high relative molecular weight, high scale inhibition efficiency, and antibacterial function

Method used

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  • Chitosan grafted hyperbranched polymer polyamide-amine (PAMAM), and preparation method and application thereof
  • Chitosan grafted hyperbranched polymer polyamide-amine (PAMAM), and preparation method and application thereof
  • Chitosan grafted hyperbranched polymer polyamide-amine (PAMAM), and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Add acrylic acid into water and stir well; add NaOH in the amount of acrylic acid and other substances into water, stir to dissolve it completely; slowly add NaOH solution into the aqueous solution of acrylic acid, adjust the pH value to 6; according to the molar ratio of chitosan and acrylic acid 1:4, mix chitosan with the above-mentioned solution, control the temperature at 80°C, 85°C, 90°C, 95°C, 100°C, and react for 5 hours at pH 6; after the reaction, adjust the reaction with NaOH solution The pH of the solution is about 10, and then centrifuged to collect the supernatant; slowly add 95% ethanol with a concentration of 2 times the volume of the clear solution to the separated clear solution under stirring, so that the product is fully precipitated, and then carried out Washing; add absolute ethanol to wash, drain, and vacuum dry at 70-80°C to obtain carboxyethyl chitosan. The degree of substitution and yield of carboxyethyl chitosan are shown in the table below.

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Embodiment 2

[0061] Add acrylic acid into water and stir well; add NaOH in the amount of acrylic acid and other substances into water, stir to dissolve it completely; slowly add NaOH solution into the aqueous solution of acrylic acid, adjust the pH value to 6; according to the molar ratio of chitosan and acrylic acid 1:4, mix chitosan with the above-mentioned solution, control the temperature at 90°C, the time is 3h, 4h, 5h, 6h, 7h, and react at pH 6; after the reaction, adjust the pH of the reaction solution with NaOH solution to about 10, then centrifuged to collect the supernatant; slowly add 2 times the volume of ethanol with a concentration of 95% to the separated supernatant under stirring, so that the product is fully precipitated, and then washed; add Wash with absolute ethanol, drain, and vacuum dry at 70-80°C to obtain carboxyethyl chitosan. The degree of substitution and yield of carboxyethyl chitosan are shown in the table below.

[0062] The impact of table 3 carboxyethyl chi...

Embodiment 3

[0065] Add acrylic acid into water and stir well; add NaOH in the amount of acrylic acid and other substances into water, and stir to dissolve it completely; slowly add NaOH solution into the aqueous solution of acrylic acid, and adjust the pH to 6; Ratio 1:3, 1:3.5, 1:4, 1:4.5, 1:5, mix chitosan with the aforementioned solution, control the temperature at 90°C, the time is 5h, the pH value is 6, and react; after the reaction Use NaOH solution to adjust the pH of the reaction solution to about 10, then centrifuge to collect the supernatant; slowly add 2 times the volume of the clear liquid to the separated clear liquid under stirring. Slowly add 95% ethanol to make the product fully The precipitate is precipitated, and then washed; adding absolute ethanol to wash, draining, and vacuum drying at 70-80°C to obtain carboxyethyl chitosan. The degree of substitution and yield of carboxyethyl chitosan are shown in the table below.

[0066] The impact of table 4 carboxyethyl chitosa...

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Abstract

The invention relates to a chitosan grafted hyperbranched polymer polyamide-amine (PAMAM), and a preparation method and application thereof. The chitosan grafted PAMAM has favorable antibacterial action of chitosan, and displays excellent flocculation and antiscale effect of the PAMAM, thereby having dual effects. The chitosan grafted hyperbranched polymer PAMAM belongs to a modified natural high-polymer derivative. No heavy metal ion is added in the synthesis process. The chitosan grafted hyperbranched polymer PAMAM can be easily biodegraded, belongs to environment-friendly water treatment fine chemicals, and has obvious environment-friendly properties.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an antibacterial and scale inhibitor chitosan grafted hyperbranched polymer polyamidoamine, a preparation method and application thereof. Background technique [0002] my country's water resources are scarce and seriously polluted, and serious water shortages will cause environmental and social problems. It is very important to save and manage sewage, and vigorously innovating water treatment chemicals plays an important role in sewage treatment. Scale inhibitors are widely used in industrial circulating cooling water systems as a water quality stabilizer. Its research has always been a hot spot in water treatment, and its new characteristics such as the stability of its sedimentation effect, environmental safety and antibacterial are also receiving more and more attention. Dendritic polymer antiscalants with new properties are a new direction of current wa...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G83/00C02F5/12
Inventor 张恒宋雪王晓平蓝惠霞
Owner QINGDAO UNIV OF SCI & TECH
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