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A gradient molecular brush polymer with metal cation adsorption capacity and preparation method thereof

A technology of molecular brushes and polymers, applied in chemical instruments and methods, and other chemical processes, can solve the problems of reduced washing efficiency of soaps and detergents, messy and dull hair, dark and stiff clothes, etc., to achieve unique ion adsorption energy, The effect of clear gradient structure and narrow molecular weight distribution

Inactive Publication Date: 2016-01-20
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, hard water is mainly caused by excessive calcium and magnesium ions. Although hard water will not have a great impact on human health, calcium ions in untreated hard water can easily form solid calcium carbonate (ie scale), thereby It brings many troubles to life, such as scale plaques formed on water appliances, the washing efficiency of soap and detergent is reduced, rough skin after bathing, messy and dull hair, dark and stiff clothes after washing, etc.

Method used

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  • A gradient molecular brush polymer with metal cation adsorption capacity and preparation method thereof
  • A gradient molecular brush polymer with metal cation adsorption capacity and preparation method thereof
  • A gradient molecular brush polymer with metal cation adsorption capacity and preparation method thereof

Examples

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Effect test

preparation example Construction

[0055] (1) Preparation of HEMA-TMS monomer

[0056] In a 500ml dry single-necked round bottom flask, add a stirring bar, organic solvent, hydroxyethyl methacrylate (HEMA), and triethylamine in sequence; place the flask in an ice bath, keep the temperature at 0°C, and drop Trimethylchlorosilane (TMS-Cl) was added dropwise into the flask through a liquid funnel. After the dropwise addition was completed, the reaction was stirred at 0° C. for 2 h, and then reacted at room temperature for 12 h. After the reaction is over, add deionized water to the reaction solution, let stand, separate layers, take the upper layer and wash it repeatedly with deionized water for 3 times, add an appropriate amount of desiccant to dry for 24 hours, filter to remove the desiccant, and distill under reduced pressure to remove the organic solvent. A colorless transparent liquid HEMA-TMS was obtained.

[0057] (2) Preparation of gradient copolymer poly(MMA-co-HEMA-TMS) of MMA and HEMA-TMS

[0058] Ine...

Embodiment 1

[0066] (1) Preparation of HEMA-TMS monomer

[0067] Add magneton, 250ml of anhydrous ether, 10ml of 76mmol of HEMA, 12.7ml of 91mmol of triethylamine into a dry round bottom flask in turn, place the flask in an ice bath, and keep the temperature at 0°C; use a constant pressure dropping funnel Add 11.8ml or 91mmol TMS-Cl dropwise to the flask, and a white precipitate appears in the flask during the dropwise addition; after the dropwise addition, stir and react at 0°C for 2h, and at room temperature for 12h; after the reaction, add deionized water to the reaction solution to dissolve White precipitate of quaternary ammonium salt, let it stand, separate layers, take the upper clear layer and wash it repeatedly with deionized water for 3 times, add an appropriate amount of anhydrous MgSO 4 Dry for 24h, filter to remove MgSO 4 , Diethyl ether was distilled off under reduced pressure at 50°C and 0.06 Torr to obtain a colorless transparent liquid HEMA-TMS.

[0068] (2) Preparation ...

Embodiment 2

[0077] (1) (1) with embodiment 1;

[0078] (2) Compared with Example 1, except that the flask 1 in (2) is exchanged with the substance added in the flask 2, and the dropping rate is changed to 0.8mL / h, other is the same as Example 1;

[0079] (3) (3) with embodiment 1;

[0080] (4) is the same as (4) of embodiment 1.

[0081] The weight-average molecular weight Mw of the gradient molecular brush polymer in this embodiment is 132800, and the molecular weight distribution is 1.32.

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Abstract

The invention discloses a gradient molecular brush polymer. A main chain of the gradient molecular brush polymer is a copolymer of methyl methacrylate and hydroxyethyl methylacrylate, and a side chain of the gradient molecular brush polymer is polyacrylic acid; and the weight-average molecular weight Mw of the gradient molecular brush polymer is 89600-146900, and the molecular weight distribution is 1.25-1.45. The gradient molecular brush polymer disclosed by the invention is small in molecular weight distribution, high in grafting density, and high in adsorption capacity; and a method for preparing the gradient molecular brush polymer is simple. The gradient molecular brush polymer prepared by adopting the method is accurate and clear, and the molecular structure of the polymer is easily controlled.

Description

technical field [0001] The invention relates to the field of high molecular polymers, in particular to a gradient molecular brush polymer with cationic adsorption capacity and a preparation method thereof. technical background [0002] Compared with linear environment-responsive polymers, environment-responsive molecular brush polymers have a more complex and clear three-dimensional structure, and can form unique bulk self-assembly or solution self-assembly, so as to better realize the bionic research on biological macromolecules . Polyacrylic acid (PAA) is a typical pH-sensitive polymer, which is often used in the preparation of responsive molecular brush polymers. By changing the ionic strength in solution, the ionization balance of carboxylic acid groups on PAA in aqueous solution can be affected, and finally Alter the polymer chain conformation of PAA. Therefore, the morphology of the micelles formed by the PAA-based molecular brush polymer in aqueous solution exhibits...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F220/18C08F220/14C08F230/08C08F8/00C08F8/18B01J20/26B01J20/30
Inventor 罗正鸿李锦锦张青
Owner SHANGHAI JIAOTONG UNIV
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