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High-strength high-toughness freeze-resistant heat-resistant polyacrylamide organic hydrogel and preparation method thereof

A polyacrylamide and hydrogel technology, which is applied in the field of functional polymer materials, achieves wide application prospects, excellent mechanical properties, and broadens the temperature range of use.

Active Publication Date: 2019-11-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-strength, toughness, freeze-resistant and heat-resistant polyacrylamide organohydrogel and its preparation method, which overcomes the current problem that the hydrogel system needs to be enhanced by introducing complex methods such as nano-fillers

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  • High-strength high-toughness freeze-resistant heat-resistant polyacrylamide organic hydrogel and preparation method thereof
  • High-strength high-toughness freeze-resistant heat-resistant polyacrylamide organic hydrogel and preparation method thereof
  • High-strength high-toughness freeze-resistant heat-resistant polyacrylamide organic hydrogel and preparation method thereof

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preparation example Construction

[0041] The present invention also provides a preparation method of a high-strength, frost-resistant and heat-resistant polyacrylamide organic hydrogel, comprising the following steps:

[0042] The polyacrylamide hydrogel is soaked in polypropylene glycol to obtain a high-strength antifreeze and heat-resistant polyacrylamide organic hydrogel.

[0043] Wherein, the polyacrylamide hydrogel is prepared according to the following steps:

[0044] Disperse the acrylamide monomer and crosslinking agent in water first, then add the initiator, then drop the catalyst, and stir to obtain a mixed solution;

[0045] Ultrasonic defoaming is performed on the mixed solution; the reaction temperature of the mixed solution after ultrasonic defoaming is controlled at 25° C. and kept for 4-24 hours to obtain a polyacrylamide hydrogel.

[0046] The preparation method is based on the same inventive concept as the aforementioned high-strength, toughness, freeze-resistant, and heat-resistant polyacry...

Embodiment 1

[0051] A method for preparing a high-strength, frost-resistant and heat-resistant polyacrylamide organic hydrogel, specifically comprising the following steps:

[0052] Weigh 13.8g of acrylamide monomer, dissolve it in 46ml of deionized water, then add 4.0mg of N,N'-methylenebisacrylamide, stir magnetically at room temperature to disperse evenly, then add 32.2mg of ammonium persulfate, and continue stirring Obtain a homogeneous solution, then use a pipette gun to take 22uL tetramethylethylenediamine dropwise into the above mixed solution and keep stirring evenly. After the solution is ultrasonically defoamed, it is introduced into a molding mold and reacted at room temperature for 4 hours to obtain a polyacrylamide hydrogel. Soak the prepared polyacrylamide hydrogel in polypropylene glycol 500 for 30 minutes to obtain a high-strength, freeze-resistant and heat-resistant polyacrylamide organic hydrogel.

[0053] The tensile performance test results are as follows: the tensile ...

Embodiment 2

[0055] The preparation of a high-strength antifreeze and heat-resistant polyacrylamide organic hydrogel specifically comprises the following steps:

[0056] Weigh 13.8g of acrylamide monomer, dissolve it in 46ml of deionized water, then add 8.0mg of N,N'-methylenebisacrylamide, stir it with magnetic force at room temperature to disperse evenly, then add 32.2mg of ammonium persulfate, and continue stirring Obtain a homogeneous solution, then use a pipette gun to take 44uL tetramethylethylenediamine dropwise into the above mixed solution and keep stirring evenly. After the solution is ultrasonically defoamed, it is introduced into a molding mold and reacted at room temperature for 6 hours to obtain a polyacrylamide hydrogel. Soak the prepared polyacrylamide hydrogel in polypropylene glycol 600 for 1 hour to obtain a high-strength, freeze-resistant and heat-resistant polyacrylamide organic hydrogel.

[0057] The tensile performance test results are as follows: the tensile strain...

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Abstract

The invention discloses a high-strength high-toughness freeze-resistant heat-resistant polyacrylamide organic hydrogel and a preparation method thereof. The polyacrylamide organic hydrogel is preparedby immersing a polyacrylamide hydrogel into polypropylene glycol. The polypropylene glycol acts with water molecules through hydrogen bonding to make free water transformed into non-frozen water or freezable water, at a low temperature, a small amount of free water and the freezable water form tiny ice crystals to be embedded into a polyacrylamide network, the tiny ice crystals make the strengthof the gel increased, and through shear yielding, tensile deformation capacity is given to the gel. Physical entanglement is generated between the polypropylene glycol and polyacrylamide macromolecules to achieve the enhancing effect, and the organic hydrogel shows excellent mechanical properties at the temperature of 25 DEG C and at the high temperature of 60 DEG C. Therefore, the high-strength high-toughness freeze-resistant polyacrylamide organic hydrogel can show the excellent mechanical properties at the temperature of 25 DEG C and at the high temperature of 60 DEG C, moreover, at the temperature much lower than 0 DEG C, the polyacrylamide organic hydrogel still has high deformation and fracture toughness, and the polyacrylamide organic hydrogel has a wide application prospect withina wide temperature range.

Description

technical field [0001] The invention relates to the field of functional polymer materials, in particular to a high-strength, frost-resistant and heat-resistant polyacrylamide organic hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a kind of polymer material with a three-dimensional network structure containing a large amount of water. It has important application prospects in tissue engineering, drug controlled release carriers, electronic skin, soft robots and other fields. It has attracted great attention from researchers in recent years. focus on. However, the high water content of conventional hydrogels makes them soft and brittle, low in mechanical strength, sensitive to the environment, and poor in weather resistance. At low temperatures, hydrogels will freeze and lose their flexibility, affecting normal use. Therefore, designing hydrogels with high strength and good flexibility at low temperature is of great value. [0003] The w...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L33/26C08L71/02C08K5/06C08F220/56C08F222/38
CPCC08J3/075C08F220/56C08J2333/26C08J2471/02C08K5/06C08F222/385
Inventor 卢淑欣董智贤曾润鹏
Owner GUANGDONG UNIV OF TECH
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