Aerosol Paintsis the country to promote the development of environmentally friendly paint, but some of the performance is not yet the corresponding solvent-based Aerosol Paintss, affecting its development. Graphene has a unique performance, can improve the performance of water-based paint, and promote its development, to paint workers to bring new expectations. The use of graphene in Aerosol Paintss is primarily a modified solvent-based Aerosol Paints, but there is also a significant advance in the use of modified waterborne Aerosol Paintss. Modification method can be compound modified by blending, can also be used in situ polymerization and sol-gel technology compound method can also be modified with coupling agent, while the implementation of different functional modification.
According to the general method of graphite made of graphene oxide, to the oxidized graphene dispersion were added titanate and hydrazine hydrate, in the water bath reaction under the reaction, the graphene reduction and simultaneous grafting on the titanate coupling agent molecular. The obtained mixed solution was subjected to a post-treatment and vacuum-dried to obtain a powdery modified graphene.
As the titanate coupling agent on the graphene enriched surface modification, no longer produce agglomeration, so the stability of graphene water dispersion, can be stored for a long time, suitable for the preparation of composite materials and Aerosol Paints materials. Preparation process is simple, high production efficiency, the production process and products can meet environmental requirements.
Graphene / polyester resin composite waterborne conductive Aerosol Paints. The graphene oxide was prepared by Hummers method. The aqueous solution of graphite was modified by two-step chemical reduction method. The water-based conductive graphene Aerosol Paints was prepared by adding polyester, auxiliary agent and crosslinking agent, catalyst and liquid blending. The Aerosol Paints has high electrical conductivity and mechanical properties, can be applied to electromagnetic shielding, anti-static, anti-corrosion, heat, wear and electronic circuits and other fields, with a wide range of applications.
The graphene-modified wear-resistant water-based glass Aerosol Paints is composed of two components, the first component is the base film forming agent and the second component is the curing agent. Wherein the first component comprises 20% to 40% of modified epoxy resin, 0.5% to 7% of auxiliary agent, 0.1% to 5% of graphene oxide, 1% to 2% of coupling agent and the balance of water Fraction); the second component is an amine-based curing agent. The two components are mixed before use, wherein the second component comprises from 3% to 30% of the mass fraction of the mixture. The Aerosol Paints has high hardness, good wear resistance, and glass substrate affinity and adhesion, water resistance, good ethanol resistance, and meet the environmental requirements. In addition, the preparation method is simple and has important commercial application value.
The graphene prepared by the Hummers method was added to the acrylic polymer emulsion, and the selected additives were added. The cement was added in proportion to stir and disperse to prepare an oxidized graphene modified polymer cement waterproof Aerosol Paints. The addition of oxygenated graphene enriched oxygen-containing functional groups can adjust the growth of cement hydration products and improve the tensile strength and toughness of the cementitious polymer emulsion. The Therefore, the oxidized graphene modified polymer cement waterproof Aerosol Paints has good durability, impermeability and physical and mechanical properties, the application prospect is broad.
The vacuum dehydrated polyether polyol (N210) and TDI reaction of polyurethane prepolymer, adding dimethylol propionic acid into the hydrophilic carboxyl group, adding triethylamine and saltification, adding enriched graphene solution, to Ionized water and ethylenediamine were subjected to emulsification reaction. After distillation of acetone under reduced pressure, the vitamin C solution was added dropwise to carry out in situ reduction reaction to obtain graphene / waterborne polyurethane nanocomposite latex resin. The latex resin can be applied to electrostatic protection, anti-corrosion Aerosol Paints, architectural Aerosol Paintss and other fields, the invention simple, environmentally friendly, suitable for large-scale production.
Nano-TiO2 as a kind of photocatalytic nano-materials, with antibacterial effect, but it is low for visible light absorption, nanoparticles tend to gather, greatly reducing its sterilization. In the nano-TiO2 antimicrobial Aerosol Paints, the introduction of 5% or less graphene, significantly improve the Aerosol Paints on the visible light absorption rate, and to enhance the photocatalytic activity of nano-TiO2 and antibacterial, sterilization capacity, the modified water-based polyurethane antibacterial Comprehensive performance has greatly improved. And has good surface properties, water resistance and mechanical properties.
(1) Silane modified graphene nanofilms. The graded graphene (GO) was prepared by the Hummers method and then the GO aqueous dispersion was chemically reduced to GNS with hydrazine hydrate and then treated with DCC (N, N'-dicyclohexylcarbodiimide) and 3-aminopropyltri (APTES) was modified by ultrasonic wave for 1 h and stirred at 70 ℃ for 24 h. The APTES functional modified ferrite nanofilaments f-GNS were obtained by post-treatment.
(2) silane APTES capped aqueous polyurethane (WPU) preparation. Synthesis of PU prepolymer with isophorone diisocyanate (IPDI), polyoxypropylene glycol, diethylene glycol and trimethylolpropane mixed polyol to react with dimethylol propionic acid and then adding APTES reaction, APTES-capped aqueous polyurethane (WPU) was obtained in 86.3% yield, number average molecular weight of 28,600 (GPC assay).
(3) sol-gel technique for the preparation of f-GNS / WPU nanocomposite Aerosol Paintss. The f-GNS powder was dispersed in deionized water by means of ultrasonic waves, and the APTES-terminated WPU was added to the mixture, and the pH was adjusted with triethylamine to prepare an f-GNS / WPU nanocomposite Aerosol Paints.