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Method and apparatus for adhesive bonding in an aqueous medium

一种粘合剂、亲水聚合物的技术，应用在海藻酸粘合剂、非高分子粘合剂添加剂、胶粘剂等方向，能够解决整合困难、没有显示性能、物理和化学性质改变等问题

Inactive Publication Date: 2014-12-10
赵博欣 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Complex manufacturing processes make it difficult to translate these solutions into practical applications, especially to integrate them with existing systems
For example, chemical modification to add adhesive properties to existing drug delivery vehicles (hydrogels) is not really an option, as modifications can lead to complete changes in the physical and chemical properties of the vehicle, rendering previous knowledge of the system obsolete
As far as adhesion is concerned, the above schemes, although they have successfully simulated certain aspects of natural underwater adhesives in terms of flow characteristics, setting, and adhesion, none of them have shown any practical performance, i.e., at reasonable curing Significant bond strength is achieved within a short period of time (<2 hours)

Method used

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  • Method and apparatus for adhesive bonding in an aqueous medium
  • Method and apparatus for adhesive bonding in an aqueous medium
  • Method and apparatus for adhesive bonding in an aqueous medium

Examples

Experimental program
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Effect test

Embodiment 1

[0055] In the first experiment or fabrication, hydrophilic adhesive molecules such as concentrated dopamine hydrochloride solution and adhesive molecules such as dopamine hydrochloride were mixed with ferric nitrate, tris(hydroxymethyl)aminomethane (Tris) and A water-oxidant mixture is injected under water as the interface between a soft polydimethylsiloxane (soft like human tissue) as the first surface and a hard glass substrate as the second surface. Despite a large mismatch in the elasticity of the substrates, an improvement in interfacial adhesion was observed. Improvements in this interface may facilitate applications such as immobilizing implants in vivo.

[0056] More specifically, the adhesive strength of polydopamine was investigated by in situ polymerizing dopamine between two interfaces underwater. Inject and sandwich 0.1 mL of concentrated dopamine solution at a molar ratio of dopamine to water of 1:8 between hemispherical soft PDMS tips and flat rigid microscope ...

Embodiment 2

[0059] In another experiment or fabrication, the adhesive material provides a means of bonding and joining two similar or dissimilar materials underwater. In this embodiment, the binder material comprises two different components comprising binder molecules, a hydrophilic polymer and at least one oxidizing agent. The first component is a mixture of four chemicals: dopamine hydrochloride (hydrophilic binder molecule), ferric nitrate (oxidant), tris(hydroxymethyl)aminomethane (Tris) (oxidant), and water (oxidant). The second component is a solution of sodium alginate (hydrophilic polymer) that forms a hydrogel network with the first component when mixed. In the course of the experiments, the binding or joining takes place by successive injections of the first component and the second component at the junction (between the two surfaces to be adhered) in water. The surfaces are gently squeezed together after each injection to evenly distribute the adhesive material at and across ...

Embodiment 3

[0066] In another experiment or fabrication, it was shown that the adhesive material can maintain improved performance and suitable adaptability to meet the needs of various applications. In this experiment, the adhesive material was able to react at different pH and temperature (in the range of 4 to 10 and in the range of 20°C to 40°C, respectively) and on different substrates (such as polyethylene terephthalate) Carried on. The formulation of the adhesive material, in this embodiment, is considered variable such that its adhesive components (hydrophilic adhesive molecules, hydrophilic polymer and oxidizing agent) can be replaced by different hydrophilic polymers (such as poly(4-styrene sodium sulfonate)) and different oxidizing agents (such as ammonium persulfate and calcium ions) instead. The results of the tensile test show that the curing time is 2 hours and has a 100mm 2 The bonding strength of the contact area generally exceeds 0.5kg or 50kPa in these different applic...

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Abstract

The disclosure is directed to an adhesive material which can be applied underwater comprising hydrophilic adhesive molecules. In other embodiments, the adhesive material may also include hydrophilic polymers and / or an oxidizing agent.

Description

[0001] Citing related applications [0002] This application is a formal application based on and claiming the benefit of US Provisional Application No. 61 / 629,789, filed November 28, 2011. technical field [0003] The present disclosure relates generally to adhesive materials, and more particularly to methods and apparatus for adhesive bonding in aqueous media. Background technique [0004] An effective underwater adhesive can bring many benefits to an industry or activity dealing with underwater operations. Applications such as attaching sensors to the surface of bodies of water, patching wet tissue, or repairing leaking underwater oil pipelines could be improved. However, establishing underwater bonds has proven problematic so far. In the field of adhesion science, water or moisture has traditionally been considered as a surface contaminant or weak boundary layer. Synthetic adhesives do not perform well on wet surfaces or when used underwater due to a variety of comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J9/00C09J105/04C09J11/06
CPCC09J9/00C08K5/0091C09J105/04B29C65/4855C08K3/20C08K2003/2265C08L25/18C08K5/13C08K5/17C08L5/04C08K3/30C09J11/02
Inventor 赵波新杨非括
Owner 赵博欣
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