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Preparation method of macromolecule nanometer microsphere composite hydrogel with negative charges

A technology of composite hydrogel and nano-microspheres, which is applied in the field of preparation of nano-composite hydrogels, can solve problems such as hydrogel network instability and electrostatic damage, and achieve excellent mechanical properties, application prospects, and high mechanical properties , The effect of simple process

Inactive Publication Date: 2016-12-07
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the electrostatic interaction is easily destroyed by the influence of the surrounding environment (such as ionic strength), and the hydrogel network formed only by electrostatic interaction is unstable.

Method used

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  • Preparation method of macromolecule nanometer microsphere composite hydrogel with negative charges
  • Preparation method of macromolecule nanometer microsphere composite hydrogel with negative charges
  • Preparation method of macromolecule nanometer microsphere composite hydrogel with negative charges

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: A preparation method of a negatively charged macromolecular nano-microsphere composite hydrogel

[0024] Ⅰ. Preparation of Negatively Charged Macromolecular Nanospheres with High Surface Charge Density

[0025] (1) Preparation of seed emulsion

[0026] Add 100g of water, 10.7g of hydrophobic monomer styrene, 0.1g of anionic monomer sodium styrene sulfonate and 0.05g of pH regulator sodium bicarbonate into a three-necked flask, which is equipped with a stirring device, a reflux device and N 2 catheter. Stir at room temperature at a speed of 300 rpm for 30 minutes and pass in nitrogen gas. After the air in the system is evacuated, the temperature is raised to 70° C., and 0.08 g of initiator 1 potassium persulfate is added to react for 3 hours to obtain a seed emulsion;

[0027] (2) Preparation of negatively charged macromolecular nanosphere emulsion with high surface charge density

[0028] Continue to add 0.05 g of sodium bicarbonate and 0.08 g of potassium...

Embodiment 2

[0043] Example 2: A preparation method of a negatively charged macromolecular nano-microsphere composite hydrogel

[0044] Ⅰ. Preparation of Negatively Charged Macromolecular Nanospheres with High Surface Charge Density

[0045] ⑴ Preparation of sub-emulsion

[0046] Water: hydrophobic monomer methyl methacrylate: anionic monomer sodium styrene sulfonate: pH regulator sodium bicarbonate: initiator 1 The quality of potassium persulfate is 100: 10.7: 0.04: 0.05: 0.08; according to the proportion, Add 100g of water, 10.7g of hydrophobic monomer methyl methacrylate, 0.04g of anionic monomer sodium styrene sulfonate and 0.05g of pH regulator sodium bicarbonate into a three-necked flask, which is equipped with a stirring device, a reflux device and N 2 catheter. Stir at room temperature at a speed of 300 rpm for 30 minutes and pass in nitrogen gas. After the air in the system is evacuated, the temperature is raised to 70° C., and 0.08 g of initiator 1 potassium persulfate is adde...

Embodiment 3

[0054] Example 3: A preparation method of a negatively charged macromolecular nano-microsphere composite hydrogel

[0055] 1. Preparation of negatively charged macromolecular nanospheres with high surface charge density, as in Example 1.

[0056] Ⅱ. Preparation of Negatively Charged Macromolecular Nanosphere Composite Hydrogel

[0057] The mass ratio of water, water-soluble monomer acrylamide, cationic monomer, initiator 2, cross-linking agent and the negatively charged macromolecular nano-microsphere emulsion with high surface charge density obtained in step 1 is 100:40:20 : 0.1: 0.08: 40, 5g water, 2g water-soluble monomer acrylamide, 1.0 g cationic monomer methacryloyloxyethyltrimethylammonium chloride, 0.005g initiator 2 ammonium persulfate, 0.004g The coupling agent N,N'-methylenebisacrylamide and 2g of the negatively charged macromolecular nanosphere emulsion with high surface charge density obtained in (2) of step Ⅰ are mixed uniformly to obtain a uniform hydrogel prem...

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Abstract

The invention provides a preparation method of macromolecule nanometer microsphere composite hydrogel with negative charges. Through the electrostatic effect between positive ions and negative ions, high-surface-charge-density macromolecule nanometer microspheres with negative charges are added in a chemical-crosslinking hyhrogel network containing a certain amount of positive ions, the nanometer microspheres act with positive ion monomers with the nanometer microspheres as the physical crossing points to form the chemical-physical-double-crosslinking composite hydrogel. The preparation method is simple in process; by increasing the surface charge density or the positive ion monomer content of the macromolecule nanometer microspheres, the electrostatic effect between the microspheres and the chemical-crosslinking hyhrogel network can be improved. The mechanical property of the prepared macromolecule nanometer microsphere composite hydrogel with negative charges is remarkably higher than that of chemical-crosslinking hyhrogel, the highest tensile strength of the composite hydrogel can reach 800 KPa, and the highest elongation at break can reach 2500%. The prepared hydrogel has better mechanical property and application prospects.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite hydrogel, and relates to a preparation method of negatively charged macromolecule nanomicrosphere composite hydrogel. Background technique [0002] Hydrogel is a polymer network system, which is soft in nature, can maintain a certain shape, and can absorb a large amount of water. All water-soluble or hydrophilic polymers can form hydrogels through certain chemical cross-linking or physical cross-linking. Hydrogel is a water-swellable cross-linked polymer material with special physical properties, which can be widely used in medical treatment and tissue engineering. In addition, it is also widely used in the fields of daily necessities and industrial products. [0003] The network of traditional chemically crosslinked hydrogels is not uniform, the molecular chain length distribution between crosslinking points is wide, and the three-dimensional network cannot effectively disperse stress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/34C08F222/38C08F212/08C08F212/14C08F220/14C08J3/075
CPCC08F212/08C08F220/14C08F220/56C08J3/075C08J2333/26C08J2425/08C08J2433/12C08F220/34C08F222/385C08F212/14
Inventor 刘丽潘鸽吴广峰杜超
Owner CHANGCHUN UNIV OF TECH