Preparation method of double-network hydrogel

A hydrogel and double network technology, which is applied in the field of polymer material preparation, can solve the problems of unstable gel performance and long time consumption, and achieve the effect of high compression mechanical properties and high strength mechanical properties

Inactive Publication Date: 2019-08-02
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This reaction not only takes a long time but also has strict requirements on the thickness of the gel. If the gel has a certain thickness, the degree of reaction between the carboxylic acid groups and the metal ions in each part of the gel will be different, resulting in poor performance of the gel. Stablize

Method used

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  • Preparation method of double-network hydrogel
  • Preparation method of double-network hydrogel
  • Preparation method of double-network hydrogel

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preparation example Construction

[0022] Such as figure 1 As shown, the present invention provides a kind of preparation method of double-network hydrogel, first uses agar as the first layer to combine with hydrogen bond, forms tight, brittle and strong network structure, and then through the optimal network structure in the second layer Based on the introduction of iron ions to achieve synergistic coordination, a new type of chemically and physically interacting second-layer network is synthesized to polymerize into a hydrogel, and the synergistic coordination of ions is achieved while the double-network hydrogel undergoes free radical polymerization. position, so that the hydrogel has the mechanical properties of fatigue resistance, self-recovery, high tensile and high compression.

[0023] The raw materials used in the preparation of the double network hydrogel in the present invention include the following components: monomers, crosslinking agents, photoinitiators, ferric nitrate nonahydrate, agar and wate...

Embodiment 1

[0033] First configure the crosslinking agent aqueous solution with a concentration of 10mg / ml, and then start to prepare the double network hydrogel:

[0034] S1. Add 70mg agar, 2.0574g acrylamide, 0.0665g photoinitiator to the first reactor, then add 41uL acrylic acid and 6.3ml water; add 0.0119g iron nitrate nonahydrate, 0.7ml water and 137uL cross-link The aqueous solution of the agent is stirred and mixed uniformly in the second reactor;

[0035] S2, the first reactor is charged and discharged under the protection of nitrogen to remove the air inside, and the first reactor is placed in an oil bath at 90° C. and heated for 5 minutes to form a uniform solution in a sealed state;

[0036] S3. Take the first reactor out of the oil bath, cool it down to room temperature and store it at -3°C for 5 minutes to form the first network of the double network hydrogel, and keep the solution mixing process under low temperature protection Preventing its polymerization; adding the mixe...

Embodiment 2

[0039] First configure the crosslinking agent aqueous solution with a concentration of 10mg / ml, and then start to prepare the double network hydrogel:

[0040]S1. Add 105mg agar, 2.0362g acrylamide, 0.0665g photoinitiator to the first reactor, then add 61uL acrylic acid and 6.3ml water; add 0.0358g iron nitrate nonahydrate, 0.7ml water and 137uL cross-link The aqueous solution of the agent is stirred and mixed uniformly in the second reactor;

[0041] S2, the first reactor is charged and discharged under the protection of nitrogen to remove the air inside, and the first reactor is placed in an oil bath at 85° C. and heated for 8 minutes to form a uniform solution in a sealed state;

[0042] S3. Take the first reactor out of the oil bath, cool it down to room temperature and store it at -3°C for 3 minutes to form the first network of the double network hydrogel, and keep the solution mixing process under low temperature protection Prevent its polymerization; add the mixed solu...

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Abstract

The invention discloses a preparation method of double-network hydrogel. The preparation method comprises steps as follows: firstly, agar, acrylamide and a photoinitiator are added to a first reactor,then acrylic acid and first raw water accounting for 90% of total amount of water are added, agar is taken as a first layer and combined by hydrogen bonds, and a first-layer network is formed. Synergistic coordination of ions is realized while free radical polymerization of the double-network hydrogel is performed, the synergistic coordination effect is realized by introducing iron ions on the basis of the optimal second-layer network, one novel second-layer network with chemical and physical joint interaction is synthesized to obtain the hydrogel by polymerization, the synergistic coordination of the ions is realized while free radical polymerization of the double-network hydrogel is performed, and the hydrogel has mechanical properties such as fatigue resistance, self-recovery, high tensile strength and high compression.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and relates to a preparation method of a high-strength, fatigue-resistant and self-restoring double-network hydrogel. Background technique [0002] Hydrogel polymers, as soft and watery materials, have been widely used in industry, agriculture, and biomedicine, including scaffolds for tissue engineering, biomaterials for promoting wound healing, drug delivery carriers, and human soft tissue substitutes. However, most hydrogel polymers are very fragile, and they fracture and fail under very small stresses and strains. It has poor mechanical properties due to its inherent structure that cannot effectively dissipate energy. Therefore, different schemes and models have been proposed to design new network structures to improve the mechanical properties and toughness of gels, including tetrapolyethylene glycol hydrogels, nanocomposite hydrogels, hydrophobic-related hydrogels, and ...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08F251/00C08F220/56C08F220/06C08F222/38C08F2/48C08L5/12
CPCC08F2/48C08F251/00C08J3/075C08J3/24C08J2305/12C08F220/56C08F220/06C08F222/385
Inventor 李青山姜兵李柏峰高乐陈强
Owner YANSHAN UNIV
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