31 results about "Epoxy nanocomposites" patented technology

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 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.

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.