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A kind of hyperbranched polymer modified polymer film and its preparation method and application

A technology of hyperbranched polymer and polymer membrane, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve the problems of easy pollution, uncontrollable hydrophilic modification, etc.

Active Publication Date: 2020-07-28
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of polymer membranes being easily polluted and uncontrollable hydrophilic modification during use, the purpose of the present invention is to design a hydrophilic substance with a special structure, functionalize the surface of the membrane, and construct a hydrophilic anti- Contamination of surfaces prolongs membrane life during application

Method used

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  • A kind of hyperbranched polymer modified polymer film and its preparation method and application
  • A kind of hyperbranched polymer modified polymer film and its preparation method and application
  • A kind of hyperbranched polymer modified polymer film and its preparation method and application

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Embodiment 1

[0062] The preparation of embodiment 1 hyperbranched polymer modified polymer film

[0063] The polymer film selected in this embodiment is a polyvinylidene fluoride film.

[0064] (1) Initiator Bn 2 -The synthesis of Tris includes the following steps: adding Tris to the polar solvent N,N-dimethylformamide (DMF), stirring at 50°C for 1.5h to obtain a mixture A, the ratio of DMF to Tris is 150mL: 5g; Add sodium carbonate to the mixed solution A, adjust the pH of the system to 8, and continue to stir for 1.5 hours to obtain the mixed solution B; add benzyl bromide to the mixed solution B, reflux at 140°C for 24 hours, and wait for the reaction system to cool to room temperature , filter, and remove the sodium carbonate solid to obtain a mixed solution C, the mass ratio of benzyl bromide to Tris is 17:5.5; the mixed solution C is placed in a vacuum distillation device, and the DMF solvent is assisted in a vacuum oven at 85°C to obtain Bn 2 - Crude Tris; Bn dissolved in chlorofo...

Embodiment 2

[0076] The preparation of embodiment 2 hyperbranched polymer modified polymer film

[0077] The polymer film selected in this embodiment is polytetrafluoroethylene film.

[0078] (1) Initiator Bn 2 -The synthesis of Tris comprises the following steps: adding Tris to a polar solvent, stirring at 40° C. for 2 h to obtain a mixed solution A, the ratio of the polar solvent to Tris is 100 mL: 3 g; adding sodium carbonate to the mixed solution A, Adjust the pH of the system to 7, continue to stir for 2 hours to obtain a mixed solution B; add benzyl bromide to the mixed solution B, and reflux the reaction at 120°C for 30 hours. After the reaction system is cooled to room temperature, filter to remove the sodium carbonate solid to obtain a mixed solution Solution C, the mass ratio of benzyl bromide to Tris is 14:3; the mixed solution C is placed in a vacuum distillation device, and the DMF solvent is assisted in a vacuum oven at 80°C to obtain Bn 2 - Crude Tris; Bn dissolved in chlo...

Embodiment 3

[0090] The preparation of embodiment 3 hyperbranched polymer modified polymer film

[0091] The polymer membrane selected in this example is a polysulfone membrane; the plant polyphenols are a mixture of tea polyphenols and grape seed polyphenols at a mass ratio of 1:1.

[0092] (1) Initiator Bn 2 -The synthesis of Tris comprises the following steps: adding Tris to a polar solvent, stirring at 60° C. for 1 h to obtain a mixed solution A, the ratio of the polar solvent to Tris is 200 mL: 8 g; adding strong bicarbonate to the mixed solution A Potassium, adjust the pH of the system to 9, and continue to stir for 1 hour to obtain a mixed solution B; add benzyl bromide to the mixed solution B, and reflux at 160°C for 18 hours. After the reaction system is cooled to room temperature, filter to remove the potassium bicarbonate solid , to obtain a mixed solution C, the mass ratio of benzyl bromide to Tris is 20:8; the mixed solution C is placed in a vacuum distillation device, and th...

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Abstract

The invention discloses a hyperbranched polymer-modified polymer film, and a production method and an application thereof, and belongs to the field of modified polymer films having an antifouling property. In order to overcome the disadvantage of a series of temporary or permanent pollution of proteins, oils and other pollutants to polymer films in the prior art due to low surface energy, a specially-structured hyperbranched polymer is prepared through benzyl group protection and deprotection by starting with an initiator, and plant polyphenols are used to graft the film of a polymer film withthe specially-structured hyperbranched polymer in order to produce the hyperbranched polymer-modified polymer film. The hyperbranched polymer-modified polymer film has the advantages of remarkable antipollution and antibiosis property, improved hydrophilicity, and excellent application prospect in the field of sewage treatment. An easily-operated, strong-universal and effective way is opened up for the modification of polymer films under mild conditions.

Description

technical field [0001] The invention relates to the field of modified polymer films with antifouling properties, in particular to a hyperbranched polymer modified polymer film and its preparation method and application. Background technique [0002] Polymer membranes have excellent film-forming properties, chemical and thermal stability, oxidation resistance, corrosion resistance, and acid and alkali resistance, and are one of the most common membrane materials. For example, the invention patent with application number 201310472682.1 discloses "a method for preparing a polymer porous membrane for removing water pollutants", which is characterized in that cyclodextrin is blended with membrane materials and a crosslinking agent is added The cyclodextrin is fixed in the membrane material, avoiding the loss of cyclodextrin from the polymer porous membrane after repeated use, which leads to the loss of the selective separation function of the polymer porous membrane and the hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00C02F1/44
CPCB01D67/0006B01D69/02B01D71/34B01D2323/46B01D2325/36C02F1/44
Inventor 陈莉徐李昊吴子康何洋赵义平
Owner TIANJIN POLYTECHNIC UNIV
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