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CN-121975458-A - Adhesive material with reversible stretching universality adhesion, and preparation method and application thereof

CN121975458ACN 121975458 ACN121975458 ACN 121975458ACN-121975458-A

Abstract

The invention belongs to the field of liquid adhesive materials, and particularly relates to an adhesive material with reversible stretching universality adhesion, and a preparation method and application thereof. The preparation method of the adhesive material comprises the following steps of S1, mixing deionized water and acidic polysaccharide with weight average molecular weight of 0.8-2 MDa, stirring until the mixture is dissolved to obtain an acidic polysaccharide solution, S2, adding inorganic metal salt into the acidic polysaccharide solution, stirring until the mixture is dissolved to obtain a precursor solution, S3, adding concentrated hydrochloric acid into the precursor solution, stirring until the system is viscous, standing, and self-assembling, wherein the adding amount of the concentrated hydrochloric acid is 0.1-0.325 wt% of the mass of the deionized water. The adhesive material prepared by the method has high energy dissipation efficiency and ultra-long reversible tensile rate, can effectively bear transient impact load caused by a high-speed moving target, provides stable adhesion, and is suitable for stable adhesion of various complex structure surfaces.

Inventors

  • WANG SHUTAO
  • LI YUEPENG
  • BAO RUOHAN
  • LIU QILIN

Assignees

  • 中国科学院理化技术研究所

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. A method for preparing an adhesive material with reversible stretch universal adhesion, comprising the steps of: S1, mixing deionized water and acidic polysaccharide with weight average molecular weight of 0.8-2 MDa, and stirring until the mixture is dissolved to obtain an acidic polysaccharide solution; s2, adding inorganic metal salt into the acidic polysaccharide solution, and stirring until the inorganic metal salt is dissolved to obtain a precursor solution; S3, adding concentrated hydrochloric acid into the precursor solution, stirring until the system is viscous, standing, and self-assembling to obtain an adhesive material with reversible stretching universality adhesion; wherein the addition amount of the concentrated hydrochloric acid is 0.1-0.325 wt% of the mass of the deionized water.
  2. 2. The preparation method according to claim 1, wherein the acidic polysaccharide is one or more selected from hyaluronic acid, xanthan gum, gellan gum, wen Lunjiao, pectin, sodium alginate, carrageenan, fucoidan, and ulva polysaccharide.
  3. 3. The method according to claim 1, wherein the inorganic metal salt is one or more selected from the group consisting of calcium chloride, magnesium sulfate, sodium chloride, zinc sulfate, potassium chloride, ferrous chloride, ferric chloride, aluminum chloride, and copper chloride.
  4. 4. The preparation method of claim 1, wherein the mass ratio of deionized water to acidic polysaccharide is 1:0.005-0.02.
  5. 5. The preparation method according to claim 1, wherein the addition amount of the inorganic metal salt is 0.01-0.2 wt% of the mass of deionized water.
  6. 6. The method according to claim 1, wherein in step S3, the stirring rate is 1000-1400 rmp and the stirring time is 10-30 min.
  7. 7. An adhesive material with reversible stretching universality adhesion, which is characterized in that the adhesive material is prepared by adopting the preparation method of any one of claims 1-6, and the adhesive material takes an acidic polysaccharide molecular chain as a framework and forms a three-dimensional dynamic network structure through non-dynamic covalent self-assembly.
  8. 8. The adhesive material according to claim 7, wherein the adhesive material has a viscosity in the range of 10 to 1000 Pa-s.
  9. 9. An adhesive material with reversible stretching general adhesion is characterized in that the adhesive material is prepared from the following raw materials in parts by weight 0.5-2 Parts of acidic polysaccharide with weight average molecular weight of 0.8-2 MDa; 0.01-0.2 parts of inorganic metal salt; 0.1-0.325 parts of concentrated hydrochloric acid; 99.39-97.475 parts of water; The adhesive material takes an acidic polysaccharide molecular chain as a framework, and forms a three-dimensional dynamic network structure through self-assembly under the action of non-dynamic covalent.
  10. 10. An adhesive device comprising a substrate and the adhesive material of any one of claims 7-9 coated on the substrate.

Description

Adhesive material with reversible stretching universality adhesion, and preparation method and application thereof Technical Field The invention belongs to the field of liquid adhesive materials, and particularly relates to an adhesive material with reversible stretching universality adhesion, and a preparation method and application thereof. Background With the wide application of low-altitude unmanned systems and artificial intelligence equipment technology in the sea-air field, the demands for high-reliability and low-loss capturing and recycling of moving targets are increasing. Particularly, in the tasks of maritime search and rescue, unmanned aerial vehicle recovery and the like, how to realize stable adhesion under complex environments (such as large deformation impact, fluid interference and multiphase interface switching) has become the key point of the current soft material study. The current capture and adhesion docking techniques are largely divided into mechanical and chemical adhesion. Conventional mechanical grippers or net-shaped capturing devices, when facing objects moving at high speed, tend to severely damage the object surface due to rigid contact and are difficult to adapt to irregularly shaped objects. Chemical adhesion has received considerable attention in recent years as a means of flexible capture and attachment. The capture/connection effect is realized through the infiltration and covalent/non-covalent interaction of the macromolecule chain segments at the interface. Current commercial/industrial grade liquid adhesive materials (e.g., cyanoacrylates, epoxies, etc.) are often designed as highly crosslinked rigid structures for high strength adhesion. However, these materials, due to lack of efficient molecular fracture-recombination and energy dissipation mechanisms, exhibit significant brittleness when subjected to an external transient impact, and are extremely susceptible to stress concentrations leading to de-adhesion. Meanwhile, most liquid adhesive materials are very prone to phase separation or physical adhesion failure when facing complex fluid environments due to interface energy mismatch, such as when facing low surface energy or high wetting surfaces such as oil, water, etc., and cannot establish an effective connection at oil contaminated or water wetted interfaces. In addition, most of traditional adhesive materials are irreversibly cured, and the adhesive materials have no reversibility under ultra-large deformation, so that the success rate of capturing is seriously influenced by fatigue failure of the materials when the requirements of large-scale swing or repeated capturing of targets are met. Therefore, there is a need to design a viscoelastic adhesive material with high energy dissipation capability, wide interfacial adaptability, and extreme environmental tolerance to meet the technical requirements of modern complex dynamic environments for "multi-modal lossless capture" and "cross-media stable adhesion". Disclosure of Invention In view of the problems of the prior art, a first object of the present invention is to provide a method for preparing an adhesive material with reversible stretch-generic adhesion. The adhesive material for reversible stretching universal adhesion has the advantages of simple preparation process, wide raw material sources, low cost, easy large-scale industrial-scale preparation, generation and application, and extremely high industrialization prospect. A second object of the present invention is to provide an adhesive material having reversible stretch universal adhesion prepared by the preparation method as described above. The adhesive material can generate the maximum 90000% of toughness deformation, and can realize reversible rebound within the deformation range. Moreover, the adhesion can be realized on the solid surface with the contact angle of 3-157 degrees, and the firm adhesion can be realized on the water or oil surface. In addition, by controlling the composition of the raw materials, the viscosity of the adhesive material can be adjusted within a wide range of 10-1000 Pa.s, and the adhesive material can realize the wetting spreading and the stable adhesion on the surfaces of various complex structures. A third object of the present invention is to provide an adhesive material having reversible stretch universal adhesion. A fourth object of the present invention is to provide an adhesive device. In order to achieve the first object, the present invention adopts the technical scheme that: the invention discloses a preparation method of an adhesive material with reversible stretching universality adhesion, which comprises the following steps: S1, mixing deionized water and acidic polysaccharide with weight average molecular weight (M w) of 0.8-2 MDa, and stirring until the mixture is dissolved to obtain an acidic polysaccharide solution; s2, adding inorganic metal salt into the acidic polysaccharide solution, and stirring u