Hydrogel with controllable mechanical properties and swelling ratio as well as preparation method and application thereof

A swelling rate and hydrogel technology, applied in the field of hydrogel and its preparation, can solve problems such as weak electrostatic interaction chemical crosslinking, toxic chemical crosslinking agents, increased mechanical properties and swelling rate, etc.

Active Publication Date: 2018-04-06
广东省科学院生物与医学工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the usual chemical crosslinking agents are toxic, and physical crosslinking such as hydrophilic and hydrophobic interactions and electrostatic interactions are relatively weak compared to chemical crosslinking.
In the crosslinking of hydrogels in the past, a single crosslink is usually used, such as a single chemical crosslink or a single physical crosslink, but it is difficult to improve the mechanical properties and swelling rate of a single crosslink

Method used

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  • Hydrogel with controllable mechanical properties and swelling ratio as well as preparation method and application thereof
  • Hydrogel with controllable mechanical properties and swelling ratio as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The concentration of 1g acrylamide monomer (Sinopharm Chemical Reagent Company), sulfuric acid hydrolyzed concentration is 3.144wt% ascidian cellulose nanocrystal aqueous dispersion 2.6g, zinc methacrylate (Aladdin Reagent Company) 0.05g and concentration is 4wt% Initiator potassium persulfate (Sinopharm Chemical Reagent Company) aqueous solution 0.5g, under the environment of 60 ℃, thermally initiates polymerization 48h reaction and generates hydrogel (containing ascidian cellulose nanocrystal 8wt% relative to monomer content in the hydrogel, Zinc methacrylate 5wt%, named T8Z5K2), and then soaked in deionized water at room temperature for 72h to reach swelling equilibrium.

[0025] The swelling rate is measured by gravimetric analysis, and the swelling rate (SR) is calculated by the formula Calculate, where W e and W d represent the weight of the hydrogel and the weight of the xerogel at equilibrium, respectively.

[0026] At room temperature, use a universal mater...

Embodiment 2

[0029] The concentration of 1g of acrylamide monomer, sulfuric acid hydrolyzed concentration is 3.144wt% sea squirt cellulose nanocrystal aqueous dispersion liquid 2.6g, zinc methacrylate 0g and concentration are 4wt% initiator potassium persulfate aqueous solution 0.5g, at 60 ℃ Under the environment of thermal initiation polymerization 48h reaction generates hydrogel (containing ascidian cellulose nanocrystal 8wt% relative to the monomer content in the hydrogel, zinc methacrylate 0wt%, named after T8Z0K2), then at room temperature Soak in deionized water for 72h to reach swelling equilibrium. tested as figure 1 and figure 2 As shown, the swelling rate of the resulting hydrogel with swelling balance is 22g / g, and the toughness is 30.71kJ / m 3 , the modulus of elasticity is 20kPa.

Embodiment 3

[0031] The concentration of 1g of acrylamide monomer, sulfuric acid hydrolyzed concentration is 3.144wt% ascidian cellulose nanocrystal aqueous dispersion liquid 2.6g, zinc methacrylate 0.2g and concentration are 0.5g of the initiator potassium persulfate aqueous solution of 4wt%, at 60 Under the environment of ℃, thermally initiate polymerization for 48h to generate hydrogel (containing ascidian cellulose nanocrystal 8wt% relative to the monomer content, 20wt% zinc methacrylate, named as T8Z20K2) in the hydrogel, and then at room temperature Soak in deionized water for 72h to reach swelling equilibrium. tested as figure 1 and figure 2 As shown, the swelling ratio of the hydrogel with swelling balance obtained is 161g / g, and the toughness is 3.48kJ / m 3 , the modulus of elasticity is 10kPa.

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Abstract

The invention discloses hydrogel with controllable mechanical properties and swelling ratio as well as a preparation method and application thereof. Acrylamide monomers are adopted as a matrix to be mixed and heated to react with ascidean cellulose nano crystal aqueous dispersion, zinc methacrylate and an initiator to prepare the hydrogel with the controllable mechanical properties and swelling ratio. The mechanical properties and swelling ratio of the hydrogel can be simultaneously improved, and the application potential is great.

Description

technical field [0001] The invention belongs to the field of composite materials and polymer functional materials, and in particular relates to a hydrogel with controllable mechanical properties and swelling rate, a preparation method and application thereof. Background technique [0002] Hydrogel is a three-dimensional network structure that can absorb a large amount of water but is insoluble in water. It is a soft and wet material. It has wide application potential in agriculture, food, medical and health fields, such as soil water retention , food preservation, drug release, tissue engineering replacement, biosensing, etc. However, compared with traditional hard materials, due to the lack of effective energy dissipation mechanism or material network structure, they usually do not have strong mechanical properties, which seriously limits the application of hydrogels in various aspects. In the past few decades, researchers have also done a lot of research to enhance the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F220/06
CPCC08F220/06C08F251/00C08F220/56
Inventor 常春雨莫康伟彭娜梁磊曾建宫艺丹
Owner 广东省科学院生物与医学工程研究所
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