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Preparation method of physical hydrogel which is high in elongation at break and is capable of realizing rapid self repairing

A self-healing, physical water technology, applied in the field of functional polymer materials, can solve problems such as the limitation of repairing efficiency, and achieve the effects of cost saving, good reaction repeatability, and simplified procedures

Inactive Publication Date: 2018-04-20
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These excellent research results are the basis for the development of new high-stretch self-healing hydrogels, but the repair efficiency of these materials is still limited, and a long repair time is required. How to maintain the excellent tensile properties of hydrogels It is of great research and application value to greatly improve the self-healing efficiency of hydrogels and simplify the preparation process.

Method used

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  • Preparation method of physical hydrogel which is high in elongation at break and is capable of realizing rapid self repairing
  • Preparation method of physical hydrogel which is high in elongation at break and is capable of realizing rapid self repairing

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Embodiment 1

[0018] Embodiment 1: with 4.32g acrylic acid, 0.0426g photoinitiator 2-hydroxyl-4'-(2-hydroxyethoxy)-2-methyl propiophenone (Irgacure 2959), 0.081g hexahydrate iron trichloride and 0.654g of polyvinylpyrrolidone (molecular weight: 10,000) was added to 20mL of deionized water, and ultrasonically mixed to obtain a prepolymer solution. Then the prepared pre-polymerization solution was transferred to a glass vessel with a thickness of 2 mm and reacted in an ultraviolet environment for 12 hours to obtain a physically cross-linked hydrogel.

Embodiment 2

[0019] Example 2: 4.32 g of acrylic acid, 0.0426 g of photoinitiator Irgacure 2959, 0.081 g of ferric chloride hexahydrate in 20 mL of deionized water were mixed uniformly by ultrasonic to obtain a uniform solution. Then weigh 0.432g of chitosan (molecular weight is 100000~300000) and gradually add in the solution in the above configuration, stir and mix evenly, place in an ultrasonic cleaning machine to ultrasonically remove the bubbles in the solution to obtain a pre-polymerization solution, and then The configured pre-polymerization solution was transferred to a glass vessel with a thickness of 2 mm and reacted in an ultraviolet environment for 12 hours to obtain a physically cross-linked hydrogel.

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Abstract

The invention discloses a preparation method of a physical hydrogel which is high in elongation at break and is capable of realizing rapid self repairing, and belongs to the technical field of functional high molecule material. According to the preparation method, acrylic acid, a water soluble initiator, ferric chloride hexahydrate, and a large hydrophilic molecular are prepared into a pre-polymerization liquid, and the pre-polymerization liquid is subjected to ultraviolet curing one-step method in a glassware so as to obtain the physical hydrogel. The physical hydrogel is high in elongation at break, and the value of elongation at break is 10 or higher; at room temperature, rapid self repairing can be realized in a few hours without external stimulus; the preparation method is simple andconvenient; the raw materials are industrialized industry products; the repeatability is high; and the application prospect is promising.

Description

Technical field: [0001] The invention belongs to the technical field of functional polymer materials, and relates to a preparation method of a high-stretch fast self-repairing physical hydrogel. Background technique: [0002] Hydrogel is a "soft and wet" functional polymer material with a special three-dimensional network filled with a large amount of water. Due to the special "soft and wet" characteristics of hydrogel, substances can migrate freely in its spatial network, which makes it show great application prospects in many research fields such as biomedicine, bionic materials, and flexible electronics (Sensors and Actuators B : Chemical, 2010, 147(2), 765; Advanced Materials, 2016, 28(22), 4497.). In addition, hydrogels have a lot in common with many soft tissues in the body, but biological soft tissues show good flexibility, self-healing and excellent mechanical properties, while traditional hydrogels generally have mechanical properties. Poor problems, difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/06C08F2/48C08K3/16C08L39/06C08L5/08
CPCC08F120/06C08F2/48C08K3/16C08L5/08C08L39/06
Inventor 林鹏张婷婷
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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