Composition for polymer gel, gel prepared from composition and application of gel

A technology of polymer gels and polymer compounds, applied in applications, household appliances, types of adhesives, etc., can solve the problems of less attention and research on the conformation and distribution of polymer chains, and achieve the best mechanical properties, excellent Adhesive performance, high transparency effect

Active Publication Date: 2021-02-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, little attention has been paid to the conformation and distribution of polymer chains in the dispersion and dissolution stage, which is very important for the subsequent optimization of the structure and properties of the cross-linked network.

Method used

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  • Composition for polymer gel, gel prepared from composition and application of gel
  • Composition for polymer gel, gel prepared from composition and application of gel
  • Composition for polymer gel, gel prepared from composition and application of gel

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preparation example Construction

[0048] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0049] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

Embodiment 1

[0051] Weigh 0.9 g of PVA, dissolve in 10 mL of DMSO under heating at 95° C., and stir for 3 hours to ensure uniform dissolution. After removing air bubbles, pour the transparent and clear solution into a PTFE mold, cover the surface with a glass sheet, and then immerse in a large amount of excess water at room temperature for 48 hours of solvent replacement to form a hydrogel, which is recorded as PVA exogel-9.

[0052] The obtained PVA exogel-9 hydrogel is tested for tensile mechanical properties, the sample is dumbbell-shaped (17mm long, 4mm wide, 2mm thick), the tensile rate is 50mm / min, and the tensile modulus is 0.10 ± 0.02MPa, The tensile strength is 0.58±0.16MPa. The resulting PVA exogel-9 hydrogel was subjected to a fracture toughness test. The sample was a rectangle (length 5mm, width 20mm, thickness 1mm), the tensile rate was 50mm / min, and the fracture toughness was 0.66±0.03kJ / m 2 .

[0053] After the obtained PVA exogel-9 hydrogel was swelled in water for 7 day...

Embodiment 2

[0055] Weigh 1.8g of PVA, dissolve in 10mL DMSO under heating at 95°C, and stir for 3 hours to ensure uniform dissolution. After removing air bubbles, pour the transparent and clear solution into a PTFE mold, cover the surface with a glass sheet, and then immerse in a large amount of excess water at room temperature for 48 hours of solvent replacement to form a hydrogel, which is recorded as PVA exogel-18.

[0056] Such as figure 1 It can be seen that PVA exogel-18 hydrogel has excellent tensile properties and can be stretched to more than 6 times its original length without breaking.

[0057] Such as figure 2 As shown, PVA exogel-18 hydrogel has high transparency.

[0058] The PVA exogel-18 hydrogel that obtains is carried out tensile mechanical property test, and sample is dumbbell shape (long 17mm, wide 4mm, thick 2mm), and tensile rate is 50mm / min, and stress-strain curve is as follows image 3 As shown, the tensile modulus is 0.18±0.01MPa, and the tensile strength is...

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Abstract

The invention belongs to the technical field of polymer gel materials, and provides a composition for polymer gel, gel prepared from the composition and application of the gel. The composition comprises a polymer compound, a first solvent and a second solvent, wherein the polymer compound comprises but is not limited to at least one of the following substances: a polymer with a hydrogen bond effect, a polymer with a hydrophobic effect and a charged polyelectrolyte; in the first solvent, the non-covalent interaction in/among the high-molecular compounds is in a weakening shielding state; in thesecond solvent, the non-covalent interaction between the polymer compounds is activated and enhanced. The polymer gel prepared by the invention has high transparency, excellent mechanical properties,swelling resistance and icing resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer gel materials, and in particular relates to a gel preparation composition, a transparent high-strength anti-swelling polymer gel prepared therefrom, a preparation method and application thereof. Background technique [0002] Polymer gel is a kind of material with a chemical or physical three-dimensional cross-linked polymer network structure and the network gap is filled with a dispersion medium, such as a polymer hydrogel when the dispersion medium is water, which is similar to biological soft tissue and has The unique microenvironment and self-adaptive features show great application potential in the fields of tissue engineering, wet bonding and soft robotics. Thanks to the dynamic reversibility of non-covalent interactions, the advantages of physically cross-linked polymer gels are excellent fatigue resistance, self-healing, shape memory, and reusability, but their disadvantages lie in mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08L5/12C08L33/08C08L33/02C09J129/04C09D129/04C09D11/106C09D11/107A61L27/20A61L27/18A61L27/16A61L27/22A61L27/52A61L27/50B33Y70/10
CPCC08J3/075C09J129/04C09D129/04C09D11/106C09D11/107A61L27/20A61L27/18A61L27/16A61L27/222A61L27/52A61L27/50B33Y70/10C08J2329/04C08J2305/12C08J2333/08C08J2433/02C08J2405/12C08L29/04C08L5/12C08L33/08C08L33/02Y02P20/54
Inventor 邱东徐礼桔乔燕
Owner INST OF CHEM CHINESE ACAD OF SCI
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