Macroporous temperature sensitive amphiphilic hydrogel material and preparation method thereof

A technology of amphiphilic and temperature-sensitive monomers, applied in the field of functional polymer materials, can solve problems such as reducing material transfer efficiency, achieve amphiphilicity and low internal transfer resistance, improve gel surface pore structure, increase The effect of specific surface area

Active Publication Date: 2019-07-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the oil-water two-phase system, due to its strong hydrophilicity, the material transfer efficiency between it and the oil phase is reduced

Method used

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  • Macroporous temperature sensitive amphiphilic hydrogel material and preparation method thereof
  • Macroporous temperature sensitive amphiphilic hydrogel material and preparation method thereof
  • Macroporous temperature sensitive amphiphilic hydrogel material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 prepares hydrogel material PNIPAM

[0038] Weigh 1g monomer N-isopropylacrylamide (NIPAM), 0.02g initiator azobisisobutyronitrile (AIBN), 0.1g coupling agent N,N'-methylenebisacrylamide (MBAA), Then add an ethanol solution with a mass percentage content of 50%, place the added flask in a water bath at 75° C. for reaction, and take out the flask after the reaction to obtain the gel material PNIPAM. The infrared spectrum of the prepared gel material PNIPAM is as follows figure 2 , SEM such as image 3 .

Embodiment 2

[0039] Example 2 Preparation of the esterification product of acrylic acid and span80, i.e. the hydrophobic monomer AAc-span80

[0040] Weigh 4.826g span80 and 20mL toluene into the flask, stir and heat to 80℃~150℃, then add 0.72g acrylic acid, 0.044g hydroquinone, 0.388g p-toluenesulfonic acid, and react until no water is discharged from the water separator; Add the reaction product to the separatory funnel, first with Na 2 CO 3 Solution washing to remove excess acrylic acid and p-toluenesulfonic acid, after washing, let stand for stratification, then wash with NaCl solution, remove the water phase after standing for stratification, and obtain the supernatant brown oil, which is the esterification product AAc- The mixture of span80 and toluene; the mixture of AAc-span80 and toluene was rotary distilled until the quality of the product no longer changed, and the purified esterification product AAc-span80 was obtained. The infrared spectrum of the prepared esterification prod...

Embodiment 3

[0041] Example 3 Preparation of macroporous thermosensitive amphiphilic hydrogel material PNIPAM-AAc-span80

[0042] Weigh 1g monomer N-isopropylacrylamide (NIPAM), 0.03g monomer acrylic acid (AAc) and span80 esterification product AAc-span80, 0.02g initiator azobisisobutyronitrile (AIBN), 0.2g Coupling agent N,N'-methylenebisacrylamide (MBAA), and then add 50% ethanol solution by mass percentage, place the added flask in a water bath at 75°C for reaction, and put The flask was taken out to obtain the macroporous thermosensitive amphiphilic gel material PNIPAM-AAc-span80.

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Abstract

The invention belongs to the field of polymer materials, and discloses a novel macroporous temperature sensitive amphiphilic hydrogel material PNIPAM-AAc-span80 and a preparation method thereof. According to the preparation method, N-isopropyl acrylamide (NIPAM) is used as a temperature sensitive monomer; the product of esterification between acrylic acid (AAc) and span80 is taken as a hydrophobicmonomer; and azodiisobutyronitrile (AIBN) is taken as an initiator to carry out polymerization to form the temperature sensitive amphiphilic hydrogel. The prepared macroporous temperature sensitive amphiphilic hydrogel PNIPAM-AAc-span80 has a temperature sensitive property and a pH sensitive property, and the volume of the hydrogel is obviously reduced under a high temperature condition and a strong acid condition. The preparation method has the advantages of high stability, mild reaction conditions, and simple technology. The prepared macroporous temperature sensitive amphiphilic hydrogel material has a good performance and has a very good application prospect in fields such as extraction, separation, drug controlled release, catalyst carrier, and the like.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a novel macroporous temperature-sensitive amphiphilic hydrogel material PNIPAM-AAc-span80 and a preparation method thereof. Background technique [0002] Environmentally sensitive hydrogels, also known as smart hydrogels, have mutations in the physical and chemical properties of the polymer due to the special functional group structure in their structure as the external environmental stimuli change within a specific range. This kind of polymer is easy to process, chemically modified and morphologically tailorable. It can introduce some conventional ligand molecules into the material matrix, and then assemble into the active component. It can be adjusted by temperature, pH, etc. to make it sensitive to the target component. Achieve the effect of "receiving" and "releasing" freely. Poly N-isoacrylamide (PNIPAM) hydrogel is a type of intelligent hydrogel that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J9/00C08F220/54C08F220/28C08F222/38C08L33/24
CPCC08F220/54C08J3/075C08J9/00C08J2333/24C08F220/282C08F222/385
Inventor 朱卫霞杨玉菲郑利梅章亚东
Owner ZHENGZHOU UNIV
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