POSS (polyhedral oligomeric silsesquioxane)-centered star copolymer flocculant and preparation method and application thereof

A star-shaped copolymer and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unsuitable for heavy industrial sewage treatment, general flocculation efficiency, etc., and achieve small dispersion coefficient, good flocculation effect and stable performance Effect

Active Publication Date: 2018-03-16
HUNAN CHENLI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flocculation efficiency of this product is average, so it is not suitable for the treatment of heavy industrial sewage

Method used

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  • POSS (polyhedral oligomeric silsesquioxane)-centered star copolymer flocculant and preparation method and application thereof
  • POSS (polyhedral oligomeric silsesquioxane)-centered star copolymer flocculant and preparation method and application thereof
  • POSS (polyhedral oligomeric silsesquioxane)-centered star copolymer flocculant and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The POSS-centered star-shaped copolymer flocculant of the present invention is characterized in that: the star-shaped copolymer flocculant is centered on cage polysilsesquioxane (POSS), and each silicon atom of POSS An acrylamide copolymer molecular chain is attached to it, and the star-shaped copolymer sewage treatment agent is synthesized by RAFT emulsion polymerization, with a number average molecular weight of 500,000 to 1,000,000 and a polydispersity coefficient of less than 1.3. The specific preparation method is as follows:

[0024] (1) Preparation of RAFT reagent centered on POSS: 30 parts of 2-(ethyltrithiocarbonate)-2-methylpropionyl chloride, 17.0 parts of aminophenyl POSS were dissolved in 100 parts of acetone, Heating to 50°C under stirring for 8 hours, cooling to room temperature, distilling off the solvent under reduced pressure, and then washing repeatedly with ethanol to obtain POSS containing octaaminotrithioester, which is the RAFT reagent centered on ...

Embodiment 2

[0027] The POSS-centered star-shaped copolymer flocculant of the present invention, the star-shaped copolymer flocculant is centered on cage polysilsesquioxane (POSS), and each silicon atom of POSS is connected with propylene Amide copolymer molecular chain, the star-shaped copolymer sewage treatment agent is synthesized by RAFT emulsion polymerization, the number-average molecular weight is 500,000-1,000,000, and the polydispersity coefficient is less than 1.3. The specific preparation method is as follows:

[0028] (1) Preparation of POSS-centered RAFT reagent: 20 parts of 2-(propyltrithiocarbonate)-2-methylpropionyl chloride, 10.5 parts of aminophenyl POSS were dissolved in 50 parts of ethyl acetate , heated to 80°C for 6 hours under stirring, cooled to room temperature, distilled off the solvent under reduced pressure, and then washed repeatedly with ethanol to obtain POSS containing octaaminotrithioester, which is the RAFT reagent centered on POSS;

[0029] (2) RAFT polym...

Embodiment 3

[0031]The POSS-centered star-shaped copolymer flocculant of the present invention, the star-shaped copolymer flocculant is centered on cage polysilsesquioxane (POSS), and each silicon atom of POSS is connected with propylene Amide copolymer molecular chain, the star-shaped copolymer sewage treatment agent is synthesized by RAFT emulsion polymerization, the number-average molecular weight is 500,000-1,000,000, and the polydispersity coefficient is less than 1.3. The specific preparation method is as follows:

[0032] (1) Preparation of RAFT reagent centered on POSS: 23 parts of 2-(n-butyl trithiocarbonate group)-2-methyl propionyl chloride, 11.5 parts of aminophenyl POSS were dissolved in 40 parts of butyl acetate ester and 50 parts of methyl ethyl ketone, heated to 65°C for 6.5 hours under stirring, cooled to room temperature, distilled off the solvent under reduced pressure, and then washed repeatedly with ethanol to obtain octaaminotrithioester instead of POSS, that is, POSS ...

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Abstract

The invention relates to a POSS (polyhedral oligomeric silsesquioxane)-centered star copolymer flocculant and a preparation method and application thereof. An acrylamide copolymer molecular chain is connected to each silicon atom of POSS serving as the center, a star copolymer sewage treating agent is synthesized by RAFT emulsion polymerization, the number-average molecular weight is 500000-1000000, and the polydispersity index is smaller than 1.3. Compared with the prior art, the POSS-centered star copolymer flocculant and the preparation method and application thereof have advantages that (1) the POSS-centered star copolymer sewage treating agent is disclosed for the first time; (2) by RAFT emulsion polymerization, the copolymer flocculant is large in molecular weight, low in coefficientof dispersion and stable in performance; (3) the copolymer sewage treating agent structurally contains a great quantity of chelation amino groups and organic ammonium ions, so that excellent flocculation effects and high adaptability are realized.

Description

technical field [0001] The invention relates to a sewage treatment agent, in particular to a POSS-centered star-shaped copolymer flocculant and its preparation method and application, belonging to the technical field of sewage treatment. Background technique [0002] my country is a country with a shortage of water resources. The per capita water resources are only 1 / 4 of the world's, and the distribution of water resources is seriously uneven. How to alleviate the shortage of water resources and pollution has become an urgent problem. In order to solve the problem of water shortage, in addition to increasing sources of income, reducing expenditure, and comprehensive utilization, pollution control has gradually become one of the basic principles that our country must adhere to for a long time. At present, there are many methods to deal with the pollution of water resources, such as physics, chemistry, biology and synthesis. The physical method is to recover the insoluble su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F293/00C08F220/56
CPCC02F1/56C08F220/56C08F293/005C08F2438/03
Inventor 朱佳媚
Owner HUNAN CHENLI NEW MATERIAL CO LTD
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