31 results about "Epoxy nanocomposites" patented technology

The invention relates to the field of nanocomposite materials, in particular to a halloysite nanotube / epoxy resin nanocomposite material. The halloysite nanotubes of the present invention are branched polyethyleneimine grafted halloysite nanotubes, and the weight ratio of the branched polyethyleneimine grafted halloysite nanotubes to epoxy resin is 0.2~ 20:100; preferably 0.5-5:100; the present invention grafts hyperbranched polyethyleneimine onto epoxidized HNTs, and the branched structure has abundant amino groups, so that halloysite nanotubes and epoxy resin matrix Stronger chemical bonds or hydrogen bonds are formed between them to enhance the interfacial interaction. The modified halloysite nanotube prepared by the invention can effectively improve the impact resistance of the epoxy resin, reduce the brittle fracture of the epoxy resin, and has broad application prospects in the fields of automobiles, electronics, functional materials, aerospace and the like.

The invention discloses an epoxy nanocomposite based on polyhedral oligomeric silsesquioxanes (POSS) and a preparation method of the epoxy nanocomposite based on the POSS and relates to the epoxy nanocomposite with a controllable phase structure capable of improving effect and based on the POSS. The preparation method includes the following steps of allocating a POSS monomer, a chain transfer agent and an initiating agent in a solution according to the measuring amount through a reversible addition-fragmentation chain transfer (RAFT) method, conducting freeze thaw and degassing through liquid nitrogen, charging argon shield to enable the mixture to react, and obtaining PMAiBuPOSS; further allocating PMAiBuPOSS, Methl Methacrylate monomer (MMA) and an initiating agent in a solution, and obtaining POSS base block copolymer , namely, PMAiBuPOSS-b-PMMA, through the RAFT; conducting melt blending on the POSS monomer, epoxy resin, the prepared POSS base block copolymer to obtain blend precursor of the POSS and the epoxy, adding in a curing agent, fully stirring, dissolving the mixture the curing agent, pouring the blend into a die, conducting temperature programming and curing, and obtaining the nanocomposite with the controllable phase structure and based on the POSS.

The present invention relates to a kind of transparent epoxy nano-composite material and its preparation method and application, the filler of this transparent epoxy nano-composite material is composite nano-inorganic filler; Said composite nano-inorganic filler comprises: silicon dioxide nano-particles as core, Titanium dioxide coated outside the silica nanoparticles as a shell and an outer layer of silicon dioxide coated outside the titanium dioxide shell; the transparent epoxy nanocomposite material of the present invention has good transparency, which is different from ordinary pure transparent Compared with epoxy, it has excellent ultraviolet shielding effect and greatly improved ultraviolet aging resistance; the transparent epoxy nanocomposite material also has the advantages of low thermal expansion coefficient, high thermal conductivity and the like; the invention is suitable for the packaging of light-emitting semiconductor devices such as LEDs.

The invention discloses a modified zirconium phosphate-epoxy nanocomposite material and a preparation method thereof; the preparation method comprises: mixing an intercalation agent, a surfactant and a solvent, adding layered zirconium phosphate, oscillating evenly, and ultrasonically dispersing, Obtain the single-layer zirconium phosphate solution after stripping; adjust the pH of the single-layer zirconium phosphate solution with a stripping agent, centrifuge, wash, and pour off the supernatant; add zirconium phosphate and modifier to the solvent, and heat Stir and react at high temperature for 12-24 hours, after washing and drying, the modified zirconium phosphate is obtained; the modified zirconium phosphate is dispersed in a solvent, mixed with the ethanol solution of the curing agent, added epoxy resin, and stirred evenly to obtain the modified zirconium phosphate- Epoxy nano-composite material: Compared with epoxy resin, the modified zirconium phosphate-epoxy nano-composite material of the present invention has significantly improved mechanical properties and anti-corrosion properties.

The invention discloses a quantum dot with high transparency and high fluorescence efficiency / epoxy resin nano composite material, preparation and applications thereof, and belongs to the technical field of nano composite material. Poly(n-butyl methacrylate-glycidyl methacrylate) P(BMA-GMA) amphiphilic two-section copolymer compatibilizer is introduced, the PBMA section of the P(BMA-GMA) copolymer is utilized to soak the oleic acid ligand on the quantum dot surface, the PGMA section of the P(BMA-GMA) is utilized to soak the epoxy substrate, and thus a good interface compatibilizing effect is achieved. The amphiphilic compatibilizing effect of the two-section copolymer is utilized to increase the interface compatibility of quantum dots in epoxy resin substrate, thus the quantum dots are evenly dispersed in the substrate, and the prepared quantum dot / epoxy resin nano composite material has excellent transparency and fluorescence performance, and has a wide application prospect in the field of white light packaging.

The invention provides flexible long-chain polyamine polyetheramine modified carboxylated graphene oxide. Through further preparation, an epoxy nanocomposite material system thereof is obtained. Withlow dosage of the polyetheramine modified carboxylated graphene oxide rich in flexible-chain amino group on the surface, mechanical property of the epoxy nanocomposite material can be greatly improved, especially toughness (elongation at break) and compression performance are remarkably improved. The product of the invention has an important application prospect.

The invention relates to transparent epoxy nano composite material, and a preparation method and purposes thereof. The composite material comprises epoxy resin matrix material and composite nano inorganic filler which is evenly distributed in the epoxy resin matrix material; the composite nano inorganic filler consists of a zinc oxide quantum dot which is taken as a core and has grain size of 2nmto 10nm and a silicon dioxide outer layer which is taken as a shell and coated on the zinc oxide quantum dot; the epoxy resin matrix material consists of epoxy resin and epoxy curing agent; the epoxyresin is bisphenol-A epoxy resin or hydrogenated bisphenol-A epoxy resin; the epoxy curing agent is estolide curing agent which contains 1.0 weight percent to 5.0 weight percent of curing accelerator; the curing accelerator is amine curing accelerator or imidazole curing accelerator. The transparent epoxy nano composite material of the invention has excellent transparency, good fluorescence and phosphorescence effect compared with common pure transparent epoxy, and can replace traditional fluorescent powder. The invention is applicable in packaging LED and other luminescent semiconductor devices.

The invention relates to an amino-terminated modified graphene oxide and an epoxy nanocomposite material thereof. Specifically discloses a modified graphene oxide, which is obtained by replacing the -OH group on the carboxyl group on the surface of graphene oxide with an A group. The structure of the A group is as follows; Graphene oxide is used as a raw material to prepare epoxy nanocomposites. The amino-terminated modified graphene oxide prepared by the present invention can greatly improve the storage modulus and glass transition temperature of the epoxy nanocomposite material under low addition, and improve the rigidity and heat resistance of the composite material , and at the same time can significantly improve the mechanical properties, especially the tensile properties, with excellent comprehensive properties and excellent application prospects.

The invention discloses a preparation method of layered nickel silicate-coated polyaniline composite nanofibers, comprising: reacting phytic acid, aniline and ammonium persulfate in a certain ratio to obtain phytic acid-doped modified polyaniline nanofibers, Further, a large amount of layered nickel silicate nanomaterials are loaded on the surface of the modified polyaniline nanofibers by hydrothermal method, and the layered nickel silicate-coated polyaniline composite nanofibers with a core-shell structure are obtained after centrifugation, washing and drying; The invention also discloses a preparation method of an epoxy resin composite material containing layered nickel silicate coated polyaniline composite nanofibers. The layered nickel silicate-coated polyaniline composite nanofibers with a core-shell structure disclosed by the present invention can not only disperse the polyaniline nanofibers uniformly in the epoxy matrix, improve the mechanical properties, but also significantly reduce the wear rate of the material and inhibit Combustion can be used to prepare epoxy nanocomposites with high wear resistance and good flame retardancy.

Polymeric nanocomposite materials are provided comprising polycyclic aromatic hydrocarbon compounds. During polymer synthesis, polycyclic aromatic hydrocarbon groups are directly incorporated into the polymer network. Free polycyclic aromatic hydrocarbon compounds are also dispersed within the polymer matrix. The resulting nanocomposite materials exhibit improvements in the thermal, rheological, and physical properties, including reinforcement, of the polymer material as compared to the unmodified polymer.