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Intelligent microgel achieving linear temperature response and preparation method thereof

A temperature-responsive, micro-gel technology, applied in the field of functional materials, can solve problems such as cumbersome synthesis process, complex structure, and restrictions on practical application, and achieve the effect of simple method process, simple preparation conditions, and easy mass production

Active Publication Date: 2016-10-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, we can see that the above two types of linear response microgel systems have some unavoidable defects, such as relatively complex structures and cumbersome synthesis processes, which will seriously restrict their practical applications.

Method used

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  • Intelligent microgel achieving linear temperature response and preparation method thereof
  • Intelligent microgel achieving linear temperature response and preparation method thereof
  • Intelligent microgel achieving linear temperature response and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 0.351 g methoxy ethyl acrylate, 0.144 g methoxy oligoethylene glycol acrylate ( M n = 480), 0.015 g polyethylene glycol diacrylate ( M n = 258) and 0.02 g sodium dodecyl sulfonate were dissolved in 9 g deionized water, and the mixture was in N 2 Stir at room temperature for 10 min under protection, and then seal at 70 °C; after the temperature stabilizes, inject 1 ml of potassium persulfate aqueous solution (0.75 wt%) into the reaction solution through a syringe to initiate polymerization; the reaction is continued under nitrogen It was carried out under protection for 4 h, and then naturally cooled to room temperature; the microgel obtained by the reaction was purified by dialysis to remove impurities, and a linear temperature-responsive microgel was obtained.

[0024] from figure 1 It can be seen that the obtained microgels exhibit a unimodal distribution, and the distribution is narrow.

[0025] from figure 2 It can be seen that the prepared microgel showed a ...

Embodiment 2

[0027] 0.351 g methoxy ethyl acrylate, 0.144 g methoxy oligoethylene glycol acrylate ( M n = 480), 0.004 g polyethylene glycol diacrylate ( M n = 258) and 0.02 g sodium dodecyl sulfonate were dissolved in 9 g deionized water, and the mixture was in N 2 Stir at room temperature for 10 min under protection, and then seal at 70 °C; after the temperature stabilizes, inject 1 ml of potassium persulfate aqueous solution (0.75 wt%) into the reaction solution through a syringe to initiate polymerization; the reaction is continued under nitrogen It was carried out under protection for 4 h, and then naturally cooled to room temperature; the microgel obtained by the reaction was purified by dialysis to remove impurities, and a linear temperature-responsive microgel was obtained.

Embodiment 3

[0029] 0.351 g methoxy ethyl acrylate, 0.144 g methoxy oligoethylene glycol acrylate ( M n = 480), 0.015 g polyethylene glycol diacrylate ( M n = 258), 0.005 g of acrylic acid and 0.02 g of sodium dodecylsulfonate were dissolved in 9 g of deionized water, and the mixture was placed in N 2 Stir at room temperature for 10 min under protection, and then seal at 70 °C; after the temperature stabilizes, inject 1 ml of potassium persulfate aqueous solution (0.75 wt%) into the reaction solution through a syringe to initiate polymerization; the reaction is continued under nitrogen It was carried out under protection for 4 h, and then naturally cooled to room temperature; the microgel obtained by the reaction was purified by dialysis to remove impurities, and a microgel with both pH and linear temperature response was obtained.

[0030] from image 3 It can be seen that after the introduction of comonomer acrylic acid in the microgel preparation process, the obtained microgel has b...

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Abstract

The invention belongs to the technical field of functional materials, and particularly relates to intelligent microgel achieving linear temperature response and a preparation method thereof. According to the intelligent microgel achieving the linear temperature responses and the preparation method thereof, by means of precipitation polymerization of two kinds of oligomeric ethylene glycol acrylate monomers and an aqueous solution of a cross-linking agent, microgel which shows linear temperature response behaviors within a wider range is obtained. When acrylic monomer is introduced in the precipitation polymerization process, microgel achieving pH response and linear temperature response simultaneously can be obtained; the response behaviors can be customized and adjusted by changing the proportion. The raw material is ethylene glycol-based monomer which is good in biocompatibility, the solvent is water, the preparation process is green and free of pollution, operation is convenient, large-scale industrial production can be achieved, and the prepared microgel has the linear temperature response behaviors, makes up the gap of traditional dramatic temperature response behaviors and has the large-scale preparation potential and wide commercial application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to an intelligent microgel with linear temperature response and a preparation method thereof. Background technique [0002] Smart microgels, as porous cross-linked polymer particles in nanometer or micrometer size, can change their size under external stimuli including temperature, light, pressure, pH, ionic strength, etc. Compared with macrogels, microgels show a faster response to external stimuli due to their small size, so these microgels are used in drug release, chemical separation, catalysis, optoelectronics, imaging, sensors, microreactors, etc. It has a wide range of applications in many fields. As the most common material used to prepare microgels, poly(N-isopropylacrylamide) is a typical thermoresponsive polymer, which can undergo violent coil-micelle formation during the heating of its aqueous solution. transformation, where the transformation temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/28C08F220/06
CPCC08F283/065C08F220/281
Inventor 侯磊武培怡
Owner FUDAN UNIV
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