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Method for realizing temporary restorability of dynamically stable gel based on pure chemical reaction

A dynamic and stable technology, applied in the field of temporary repair of kinetically stable gels based on pure chemical reactions, can solve problems such as hindering the development of multifunctional synthetic materials, reducing the repair ability of gels, and affecting the activity of biological substances. High acceptance, avoid brittleness, reduce consumption

Pending Publication Date: 2021-11-19
山东圳谷新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors found that although bioactive components are important substances for wound repair in biological systems, their brittleness hinders the further development of multifunctional synthetic materials, and the introduction of organic solvents in the system may affect the activity of biological substances, thereby reducing the gel ability to repair

Method used

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  • Method for realizing temporary restorability of dynamically stable gel based on pure chemical reaction
  • Method for realizing temporary restorability of dynamically stable gel based on pure chemical reaction
  • Method for realizing temporary restorability of dynamically stable gel based on pure chemical reaction

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preparation example Construction

[0033] The second aspect of the present invention provides a method for preparing the above-mentioned kinetically stable gel material, comprising the following steps:

[0034] Soaking the gel containing the acylhydrazone bond or the imine bond into the solution formed by mixing the alkaline compound aqueous solution and the antifreezing agent to obtain the gel material.

[0035] Further, the gel containing acylhydrazone bond or imine bond is made of copolymer PAM-co-PDAAM and adipate dihydrazide (ADH) or glutaraldehyde and bovine serum albumin (BSA) at pH 4-5 obtained by cross-linking under conditions.

[0036] Kinetically stable gel materials were prepared by partially replacing water molecules in pre-synthesized low-pH pristine hydrogels. During the solvent replacement process, basic chemical molecules are introduced into the gel material not only to inactivate the acylhydrazone bond or imine bond to obtain a kinetically stable material, but also to facilitate the repair of...

Embodiment 1

[0047] The low-pH pristine hydrogel containing acylhydrazone bond obtained by cross-linking PAM-co-PDAAM and ADH at pH 4 was soaked into NaHCO-containing 3 The final gel material was obtained in aqueous ethylene glycol solution. Among them, the concentration of PAM-co-PDAAM is 162mg / mL, the concentration of ADH is 15mg / mL, NaHCO 3 The concentration is 0.03M, and the mass fraction of ethylene glycol is 0-90%.

[0048] Such as figure 2 As shown, from the antifreeze and anti-volatility properties of gel materials prepared by adding different contents of ethylene glycol, the addition of 60% and 90% has the best performance.

[0049] image 3 The ethylene glycol addition amount prepared for this embodiment is the repair diagram of the gel material after damage, when the gel material is mechanically damaged, smear 0.8M citric acid on its cross-section / sodium citrate buffer for repair. Here we introduce 0.1mg / mL acid-base indicator bromothymol blue (BTB) into the gel system, w...

Embodiment 2

[0054] The low-pH pristine hydrogel containing imine bonds obtained by cross-linking glutaraldehyde and BSA at pH 4 was immersed in NaHCO 3 The final gel material was obtained in aqueous ethylene glycol solution. Among them, the concentration of glutaraldehyde is 0.5wt%, the concentration of BSA is 12wt%, NaHCO 3 The concentration is 0.03M, and the mass fraction of ethylene glycol is 60%. After the gel was mechanically damaged, smearing 0.8M citric acid / sodium citrate buffer on its fracture surface could realize the repair of the structure and function of the gel, and the repair rate was finally calculated to be over 90%.

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Abstract

The invention belongs to the field of gel self-repairing, and particularly relates to a method for realizing temporary restorability of dynamically stable gel based on pure chemical reaction. According to the invention, the dynamic stability of a gel material containing an acylhydrazone bond and an imine bond is regulated and controlled by adopting an alkaline compound, the gel material can obtain a dynamic stable state under an alkaline condition, an acidic chemical fuel is smeared on a damaged section to realize rapid formation of a reversible covalent bond after the gel material is damagedso as to carry out structure repair, and CO2 generated by the subsequent double decomposition reaction is slowly released in an energy dissipation manner so as to increase the pH value of the system and make the material return to a dynamic stable state to realize functional repair of the material, so that a method for regulating and controlling the temporary repairability of the dynamic stable anti-freezing gel material through pure chemical reaction is constructed.

Description

technical field [0001] The invention belongs to the field of gel self-repair, and in particular relates to a method for realizing the temporary repairability of a kinetically stable gel based on a pure chemical reaction. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Life, as the most perfect substance in nature, is a complex system integrating multiple functions. Take the skin, the largest human organ, for example. Its functions include protection, temperature regulation, respiration and self-healing. The effective integration of multiple functions in synthetic materials is also the goal that scientists are striving to pursue. For synthetic gel materials widely used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J3/075C08J7/12C08L33/26C08L89/00C08K5/25C08K5/07
CPCC08J3/24C08J3/075C08J7/12C08J2333/26C08J2389/00C08K5/25C08K5/07
Inventor 王旭贾良莹
Owner 山东圳谷新材料科技有限公司
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