Water Compatible Nanogel Compositions for Polymer Networks
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Solution Overview
Problem
Existing nanogel additives for polymers are often hydrophobic and not adequately dispersible in water or polar resin systems, compromising mechanical properties, and there is a need for water-compatible reactive nanogels to enhance polymer properties and form monomer-free macroscopic networks.
Innovation Solution
The development of water dispersible or water-compatible nanogels produced by combining a monomer mixture of monovinyl, divinyl monomers, a difunctional chain transfer agent, and an initiator, followed by polymerization, which can be used as reactive additives or precursors to form 3D macrogel polymer networks in monomer-free water-based applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If hydrophobic nanogel additives are used, then nanogel structure and composition can be controlled, but dispersibility in water or polar resin systems deteriorates
Solution Approach 1:
The patent applies parameter changes by systematically varying the hydrophilic-hydrophobic balance of nanogel components. Specifically, it uses hydrophilic monomers (HEMA, HMA) in combination with hydrophobic monomers (BisEMA, IBMA) at controlled ratios, and incorporates polar chain transfer agents (mercaptoethanol, mercaptopropionic acid) to adjust the overall polarity and water compatibility of the nanogel system while maintaining structural integrity
Solution Approach 2:
The patent creates composite nanogel materials by combining multiple monomer types with different polarity characteristics. The nanogels are synthesized from composite monomer mixtures including hydrophilic components (HEMA, HMA), hydrophobic components (BisEMA, IBMA), and polar chain transfer agents, resulting in amphiphilic nanogel structures that exhibit both structural stability and improved water dispersibility
2Stability of the object's composition
If inert nanogel additives are used, then nanogel stability is maintained, but mechanical properties of resulting polymers deteriorate
Solution Approach 1:
The patent changes the chemical reactivity parameter of nanogels by incorporating functional groups that can participate in polymerization reactions. The use of vinyl-containing chain transfer agents and monomers with reactive functional groups transforms inert nanogels into reactive nanogels that actively contribute to polymer network formation, thereby enhancing mechanical properties while maintaining stability
Solution Approach 2:
The patent introduces reactive functional groups as intermediaries that bridge the nanogel structure and the polymer matrix. These functional groups (such as vinyl groups from chain transfer agents and monomers) act as mediators that enable covalent bonding between nanogel particles and the surrounding polymer network, improving stress transfer and mechanical strength
3Adaptability or versatility
If water dispersible nanogels are developed, then dispersibility in aqueous compositions is improved, but synthesis complexity increases
Solution Approach 1:
The patent merges multiple functions into a single synthesis process by combining monomer polymerization with chain transfer agent incorporation in one step. The synthesis simultaneously achieves nanogel formation, functional group incorporation, and water dispersibility enhancement through the use of polar chain transfer agents, eliminating the need for separate post-synthesis modification steps
4Strength
If reactive groups are attached to nanogel structures, then mechanical properties of polymers are improved, but nanogel synthesis complexity increases
Solution Approach 1:
The patent combines nanogel synthesis and functional group attachment into a single polymerization reaction. By using vinyl-containing chain transfer agents and functional monomers during the polymerization process, the reactive groups are incorporated directly into the nanogel structure as it forms, eliminating separate functionalization steps and simplifying the overall synthesis protocol
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 resulting nanogels improve the wet and dry flexural strength of polymers, enhance polymer durability, and allow for the formation of monomer-free macroscopic networks with strength dependent on nanogel structure and loading, even in the presence of water, addressing the limitations of hydrophobic nanogels and enhancing mechanical properties.
Implementation Method 1
polymerizing said mixture to form a water dispersible nanogel
Data Source
AI summary
The present invention relates to preparation and use of water dispersible nanogels and solvent dispersible reactive nanogels as additives to enhance polymer properties or as precursors to polymeric networks.