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Preparation method of high-elasticity and high-strength double-crosslinked porous hydrogel

A porous hydrogel and double cross-linking technology, applied in the field of hydrogel materials, can solve problems such as poor mechanical properties, reduced solid content of the material body, unsatisfactory mechanical properties, etc., and achieve simple production equipment, good resistance to swelling, The effect of less investment

Active Publication Date: 2021-03-12
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many methods of macroporous hydrogel research. Due to the existence of macroporous structure, the solid content of the material body is greatly reduced, and the macroporous structure is also increased. The inhomogeneity of the material makes the materials prepared so far show very poor mechanical properties, making it difficult to be widely used in devices such as artificial muscles and demanding mechanical properties. The unsatisfactory mechanical properties greatly limit the Applications of Double Crosslinked Porous Hydrogels

Method used

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  • Preparation method of high-elasticity and high-strength double-crosslinked porous hydrogel
  • Preparation method of high-elasticity and high-strength double-crosslinked porous hydrogel
  • Preparation method of high-elasticity and high-strength double-crosslinked porous hydrogel

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Weigh 10.17g of N-isopropylacrylamide, 0.648g of acrylic acid, 0.108g of ammonium persulfate, and 15mg of methylene bisacrylamide to prepare a 30mL solution with dimethyl sulfoxide as a solvent, and mix them uniformly to obtain a prepolymer solution;

[0036] (2) The obtained pre-polymerization solution is transferred to a 50mL centrifuge tube and NaCl particles are added thereto until the particles fill the solution;

[0037] (3) Transfer the saturated pre-polymerization solution filled with NaCl to a glass mold with a thickness of 2mm or a centrifuge tube of 5mL, and then irradiate it with a 36W ultraviolet lamp with a wavelength of 365nm for 2 hours at room temperature to obtain a chemically cross-linked hydrogel ;

[0038] (4) Soak the chemically cross-linked hydrogel in 250 mL of iron ion solution with a concentration of 0.10 mol / L for 18 hours to remove porogens and organic solvents and carry out physical cross-linking. Repeat twice and take out to obtain doub...

Embodiment 2

[0041] (1) Weigh 10.17g of N-isopropylacrylamide, 0.970g of acrylic acid, 0.111g of ammonium persulfate, and 16mg of methylene bisacrylamide to prepare a 30mL solution with dimethyl sulfoxide as a solvent, and mix well to obtain a prepolymer solution ;

[0042] (2) The obtained pre-polymerization solution is transferred to a 50mL centrifuge tube and NaCl particles are added thereto until the particles fill the solution;

[0043] (3) Transfer the saturated pre-polymerization solution filled with NaCl to a glass mold with a thickness of 2mm or a centrifuge tube of 5mL, and then irradiate it with a 36W ultraviolet lamp with a wavelength of 365nm for 2 hours at room temperature to obtain a chemically cross-linked hydrogel ;

[0044](4) Soak the chemically cross-linked hydrogel in 250 mL of iron ion solution with a concentration of 0.10 mol / L for 18 hours to remove porogens and organic solvents and carry out physical cross-linking. Repeat twice and take out to obtain double Cross...

Embodiment 3

[0047] (1) Weigh 10.17g of N-isopropylacrylamide, 1.94g of acrylic acid, 0.123g of ammonium persulfate, and 18mg of methylene bisacrylamide to prepare a 30mL solution with dimethyl sulfoxide as a solvent, and mix well to obtain a prepolymer solution ;

[0048] (2) The obtained pre-polymerization solution is transferred to a 50mL centrifuge tube and NaCl particles are added thereto until the particles fill the solution;

[0049] (3) Transfer the saturated pre-polymerization solution filled with NaCl to a glass mold with a thickness of 2mm or a centrifuge tube of 5mL, and then irradiate it with a 36W ultraviolet lamp with a wavelength of 365nm for 2 hours at room temperature to obtain a chemically cross-linked hydrogel ;

[0050] (4) Soak the chemically cross-linked hydrogel in 250 mL of iron ion solution with a concentration of 0.10 mol / L for 18 hours to remove porogens and organic solvents and carry out physical cross-linking. Repeat twice and take out to obtain double Cross...

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Abstract

The invention discloses a preparation method of high-elasticity high-strength double-crosslinking porous hydrogel, which comprises the following steps: preparing acrylic acid, a hydrophilic monomer, achemical crosslinking agent, an initiator and a solvent into a prepolymer solution; adding a pore-foaming agent into the pre-polymerization solution until the pre-polymerization solution is in a saturated filling state; transferring the saturated filled prepolymer solution into ultraviolet to initiate polymerization to obtain chemical cross-linked hydrogel; and soaking the chemically crosslinkedhydrogel in an iron ion solution, and carrying out physical crosslinking to obtain the double-crosslinked porous hydrogel. The method is simple and easy to implement and is free of special equipment;the porous hydrogel prepared through the method has the characteristics of high elasticity and high strength; in addition, the original mechanical strength of the porous hydrogel can be rapidly recovered under the room temperature condition after the porous hydrogel is fatigued and the good anti-fatigue characteristic is achieved. The product has important application prospects in the fields of artificial muscle, environment treatment materials, flexible electronics and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrogel materials, and in particular relates to a preparation method of a high-elasticity and high-strength double-crosslinked porous hydrogel. Background technique [0002] Hydrogel is a functional polymer material with a three-dimensional network structure. Its special network structure is filled with a large number of water molecules, making it soft and wet, and water molecules, ions and other small molecular substances can flow in the network. The characteristics of free movement and transfer make hydrogels have important application prospects in the fields of biomedicine, flexible electronics, artificial muscles, bionic lubrication, agricultural water retention, etc. (Journal of Advanced Research, 2015, 6(2), 105-121 .). The traditional hydrogel network structure is usually nano-scale pores, while the double-crosslinked porous hydrogel is a special type of structured hydrogel with a pore size signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/54C08F220/06C08F222/38C08F2/50C08J9/26C08J3/24C08L33/26C08L33/24
CPCC08F220/56C08F220/54C08F2/50C08J9/26C08J3/24C08J2333/26C08J2333/24C08J2201/0446C08J2205/022C08F220/06C08F222/385
Inventor 林鹏戚方祥夏友谊张贺新张婷婷
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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