Coacervate Adhesive Wet Surface Bonding
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Solution Overview
Problem
Current adhesive technologies face challenges in providing a strong, water-borne adhesive that can effectively bond substrates in wet environments without dispersing into water and ensuring dimensional stability post-application, while also offering antimicrobial properties.
Innovation Solution
The development of a coacervate comprising a polycation and polyanion that forms a complex coacervate, which can crosslink to create a strong, insoluble adhesive with low interfacial tension, allowing it to spread evenly on wet surfaces and maintain structural integrity underwater, along with antimicrobial activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a water-borne adhesive is used to bond substrates in wet environments, then the adhesive can be applied in aqueous conditions, but it disperses into water and loses structural integrity
Solution Approach 1:
The patent changes the physical-chemical parameters of the adhesive system by using complex coacervates with specific interfacial tension properties. The coacervate droplets maintain a balanced interfacial tension that prevents dispersion in water while allowing spreading on substrates, resolving the contradiction between water-borne applicability and structural integrity
Solution Approach 2:
The invention uses composite coacervate systems formed by complexation of polycations and polyanions. This composite structure creates droplets with tailored interfacial properties that maintain structural integrity in water while enabling wet environment application
2Area of stationary object
If the adhesive spreads evenly on wet surfaces, then it achieves good coverage, but it may lose concentration and bonding strength
Solution Approach 1:
The patent optimizes the interfacial tension parameter of the coacervate droplets to achieve a balance between spreading and concentration retention. The specific interfacial tension range enables the adhesive to spread evenly while maintaining sufficient concentration for strong bonding
3Strength
If conventional adhesives are used, then they provide basic bonding, but they lack antimicrobial properties and require additional components
Solution Approach 1:
The patent incorporates antimicrobial agents directly into the coacervate formulation, creating a multi-functional adhesive system. The single coacervate composition provides both bonding and antimicrobial protection, eliminating the need for separate antimicrobial components
Solution Approach 2:
The invention merges the adhesive function and antimicrobial function into a single integrated coacervate system. The polycation-polyanion complex structure inherently provides antimicrobial activity while maintaining bonding capability, combining multiple functions in one material
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The coacervate adhesive effectively bonds substrates in wet conditions, maintains dimensional stability, and exhibits antimicrobial properties, enhancing mechanical properties and preventing infections.
Implementation Method 1
a coacervate comprising a polycation and polyanion
Implementation Method 2
low interfacial tension, allowing it to spread evenly on wet surfaces
Implementation Method 3
forms a complex coacervate, which can crosslink to create a strong, insoluble adhesive
Data Source
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AI summary
The present teachings provide novel polymers, and methods of preparing and using thereof. The novel polymers each includes a sulfide, sulfinyl, or sulfonyl bond. The novel polymer are used to make polycations and/or polyanions, which can be used, for example, to produce adhesive complex coacervates.