Graphene-Modified Silicon-Titanium Nano-Polymer Slurry for Coating Protection
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Solution Overview
Problem
Existing anti-corrosion coatings suffer from large pores, low binder content, limited adhesion, and poor resistance to medium permeation, especially when exposed to chemically corrosive media, leading to reduced protective performance.
Innovation Solution
A graphene-modified silicon-titanium nano-polymer slurry is prepared using specific raw materials and a low-temperature nano-scale ball-milling process, forming a complex polymerized network structure that enhances adhesion and corrosion resistance through Ti—O—C, C—N, and Si—O—Si bonds, creating a dense and stable coating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large amount of filler powder is added to achieve high solid content, then the coating density improves, but the binder content decreases resulting in limited adhesion
Solution Approach 1:
Silane coupling agents are introduced as intermediary substances that chemically bridge the inorganic filler particles and organic binder matrix. The coupling agents contain both inorganic-reactive groups (e.g., alkoxy groups that hydrolyze to form silanol) and organic-reactive groups (e.g., epoxy, amino, or isocyanate groups), creating strong chemical bonds across the interface and significantly improving adhesion even at high filler loadings
Solution Approach 2:
The patent employs composite material strategies by combining inorganic fillers (such as titanium dioxide, zinc oxide, or silica) with organic polymer binders in a synergistic formulation. This composite approach allows the inorganic phase to provide density, hardness, and corrosion resistance, while the organic phase provides flexibility and adhesion, achieving high solid content without sacrificing bonding strength
2Ease of operation
If physical mixing is used to combine binder and substrate through hydrogen bonds, then the coating can be applied easily, but the adhesion is limited to 6-10 MPa
Solution Approach 1:
The patent transforms the adhesion mechanism from physical (hydrogen bonding) to chemical (covalent bonding) by changing the interaction parameters at the interface. Silane coupling agents undergo hydrolysis and condensation reactions to form siloxane bonds (Si-O-Si) with inorganic substrates and covalent bonds with organic binders, increasing adhesion strength from 6-10 MPa to potentially exceeding 20 MPa, while maintaining coating applicability through proper formulation
3Reliability
If a coating layer is exposed to chemically corrosive media, then the coating must provide electrochemical protection, but electrochemical protection mechanisms fail in direct contact with acids or alkalis
Solution Approach 1:
The patent converts the potential harm of using inert, non-reactive coating materials into a benefit by creating a chemically resistant barrier through silane-based crosslinked networks. The siloxane bonds (Si-O-Si) formed through condensation reactions create a highly stable, chemically inert three-dimensional network that resists acid and alkali attack, transforming the limitation of chemical inertness into superior corrosion protection
Solution Approach 2:
The patent applies local quality enhancement by creating a dense, crosslinked silane-modified polymer network specifically at the coating-substrate interface and within the coating matrix. This localized crosslinking provides enhanced chemical resistance and mechanical strength precisely where needed for corrosion protection, while the rest of the coating formulation maintains its protective and aesthetic functions
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 slurry improves adhesion to 25 MPa or higher, enhances corrosion resistance by preventing medium permeation, and provides improved mechanical properties such as impact resistance and abrasion resistance, maintaining stability against acids, alkalis, and salts.
Implementation Method 1
1 to 2 parts of silane coupling agent (SCA)-modified graphene
Implementation Method 2
a binder and a substrate are covalently adsorbed to each other through hydrogen bonds
Implementation Method 3
preparation method and use thereof including the following steps: mixing the titanium hydride, the activated silica, the SCA-modified graphene, the silicon-modified epoxy resin, the reactive diluent, the NMP, the dispersing agent, the coupling agent, the catalyst, the wetting agent, and the wetting aid, and subjecting a resulting mixture to low-temperature nano-scale ball-milling
Implementation Method 4
forming a complex polymerized network structure that enhances adhesion and corrosion resistance through Ti—O—C, C—N, and Si—O—Si bonds
Implementation Method 5
1 to 5 parts of a dispersing agent, 0.1 to 0.2 part of a wetting agent, and 0.1 to 0.2 part of a wetting aid
Data Source
AI summary
The present disclosure belongs to the technical field of coatings, and in particular relates to a graphene-modified silicon-titanium nano-polymer slurry, and a preparation method and use thereof. When the graphene-modified silicon-titanium nano-polymer slurry provided by the present disclosure is added to a polymer coating, the high resistance of graphene to gas and liquid permeation and the silicon-titanium graphene network structure can significantly increase the resistance of a formed coating layer to medium permeation; due to the corrosion resistance of graphene, titanium, and silicon nanoparticles, a formed coating layer has very high stability, is not easy to react with various media such as an acid, an alkali, and a salt, is not easily consumed to form pores, and is not easy to react with corrosive media to generate soluble salts or cathodic loose and expanded products, which ensures the long-term stability of a composition and a structure of the coating layer.