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

A molecular brush and polymer technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as dark and stiff clothes, reduced washing efficiency of soap and detergent, messy and dull hair, etc.

Inactive Publication Date: 2014-04-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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), thus 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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  • Gradient molecular brush polymer with metal cation adsorption capacity and preparation method thereof
  • Gradient molecular brush polymer with metal cation adsorption capacity and preparation method thereof
  • Gradient molecular brush polymer with metal cation adsorption capacity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] (1) Preparation of HEMA-TMS monomer

[0057] In a 500ml dry single-neck round-bottomed flask, add a stirrer, organic solvent, hydroxyethyl methacrylate (HEMA), and triethylamine in sequence; place the flask in an ice bath, keep the temperature at 0°C, and drop the flask with constant pressure. Trimethylchlorosilane (TMS-Cl) was added dropwise to the flask with a liquid funnel, and after the dropwise addition was completed, the reaction was stirred at 0°C for 2 hours and at room temperature for 12 hours. After the reaction is completed, add deionized water to the reaction solution, let it stand, and separate the layers. Take the supernatant and wash it 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 and transparent liquid HEMA-TMS was obtained.

[0058] (2) Preparation of gradient copolymer poly(MMA-co-HEMA-TMS) of M...

Embodiment 1

[0067] (1) Preparation of HEMA-TMS monomer

[0068] Add magneton, 250ml anhydrous ether, 10ml or 76mmol of HEMA, and 12.7ml or 91mmol of triethylamine into a dry round-bottomed flask in turn, place the flask in an ice bath, and keep the temperature at 0°C; use a constant pressure dropping funnel 11.8ml or 91mmol of TMS-Cl was added dropwise to the flask, white precipitate appeared in the flask during the dropwise addition; after the dropwise addition was completed, the reaction was stirred at 0°C for 2h, and at room temperature for 12h; after the reaction was completed, deionized water was added to the reaction solution Dissolve the white precipitate of the quaternary ammonium salt, let it stand, and separate the layers. Take the supernatant and wash it with deionized water for 3 times. Add an appropriate amount of anhydrous MgSO. 4 Dry for 24h, filter to remove MgSO 4 , at 50 ° C, 0.06 Torr under the condition of vacuum distillation to remove ether to obtain colorless transp...

Embodiment 2

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

[0080] (2) Compared with Example 1, except that the added substances in flask 1 and flask 2 in (2) are exchanged, and the dripping rate is changed to 0.8 mL / h, other is the same as in Example 1;

[0081] (3) with (3) of embodiment 1;

[0082] (4) is the same as (4) of Example 1.

[0083] In this example, the weight average molecular weight Mw of the gradient molecular brush polymer is 132800, and the molecular weight distribution is 1.32.

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PUM

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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 cation adsorption capacity and a preparation method thereof. technical background [0002] Compared with linear environment-responsive polymers, environment-responsive molecular brush polymers have more complex and definite three-dimensional structures, and can form unique bulk self-assembly or solution self-assembly, so as to better realize biomimetic 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. Change the polymer chain conformation of PAA. Therefore, the morphology of micelles formed by PAA-based molecular brush polymers in aqueous solution shows a certain ion respon...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F220/18C08F220/14C08F230/08C08F8/00C08F8/18B01J20/26B01J20/30
Inventor 罗正鸿李锦锦张青
Owner SHANGHAI JIAO TONG UNIV
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