5results about How to "Improve interface affinity" patented technology

The invention relates to the technical field of nylon 6, and discloses an anti-aging nano titanium dioxide modified nylon 6 fiber, glutaric acid reacts with nano titanium dioxide to obtain carboxylated titanium dioxide, the carboxylated titanium dioxide reacts with hydroxyl-terminated nitrile rubber to obtain hydroxyl-terminated nitrile rubber modified titanium dioxide, and the hydroxyl-terminated nitrile rubber modified titanium dioxide reacts with hexamethylene diisocyanate to obtain the anti-aging nano titanium dioxide modified nylon 6 fiber. The isocyanate esterified nitrile rubber modified titanium dioxide is further reacted with 2, 3, 5-trimethyl-1, the preparation method comprises the following steps: reacting titanium dioxide with 2, 2 '-methylenebis (4-methyl-6-tert-butylphenol) to obtain tert-butylphenol nitrile rubber modified titanium dioxide, blending the tert-butylphenol nitrile rubber modified titanium dioxide with nylon 6, and carrying out melt spinning to finally obtain the anti-aging nano titanium dioxide modified nylon 6 fiber, and nano titanium dioxide and nitrile rubber can absorb and disperse stress, so that the anti-aging performance of the nano titanium dioxide modified nylon 6 fiber is improved. The tert-butyl phenol can absorb free radicals generated in the oxidation process of a nylon 6 matrix and can effectively delay oxidation of the composite nylon 6 fiber, so that the comprehensive properties such as mechanical properties and oxidation resistance of the composite nylon 6 fiber are enhanced.

The application provides a copper sulfide gold-bearing ore flotation method based on interface selective oxidation and copper ion synergistic effect, and relates to the field of mineral flotation. The method comprises the following steps: carrying out first mixing and first reaction on the pulp of copper sulfide gold-bearing ore treated by an organic sulfur inhibitor and a mild oxidation medium to obtain oxidized pulp; carrying out second mixing and second reaction on the oxidized pulp and a copper ion regulating component to obtain copper ion regulated pulp; and carrying out third mixing and flotation on the copper ion regulated pulp, a collector and a foaming agent to obtain gold-containing concentrate. The method does not aim to improve the overall floatability of copper sulfide minerals, realizes efficient recovery of gold existing in copper sulfide minerals under the premise of not damaging the original copper-molybdenum separation system selectivity, and is suitable for various copper sulfide gold-bearing ore systems.

The invention discloses a solvent-free bi-component insulating potting mixture and a preparation method thereof, and relates to the technical field of potting compositions. Polyurethane is adopted as a potting composition, the defects that traditional epoxy resin is low in mechanical strength and poor in bonding performance are overcome through the unique structural characteristics of polyurethane, but due to the fact that the heat conductivity coefficient of polyurethane is low, the working stability of an electronic device can be greatly influenced, and the electronic device can be prevented from being damaged. Therefore, the aluminum oxide is used as the modified filler to improve the heat-conducting property of the potting composition, the inorganic filler is used for filling the polymer, the process is simple and easy to control, the processing cost is low, and industrial production is easier to realize.

The invention relates to the technical field of materials, and discloses a modified plastic composite master batch and a production process thereof.The modified plastic composite master batch is prepared from ethylene propylene diene monomer and chlorinated polyethylene as main raw materials and modified additives as additives through mixing and extrusion granulation processes. Wherein the modified additive is prepared by modifying the surface of pyrophyllite with a macromolecular modifier, and due to the existence of the macromolecular modifier, the interface affinity of the pyrophyllite and the ethylene propylene diene monomer can be improved, so that the pyrophyllite can give full play to the reinforcing effect of the pyrophyllite as an inorganic additive, and the mechanical strength of the plastic is improved. Besides, the macromolecular modifier can promote rapid formation of an expanded carbon layer structure on the surface of the material during combustion to effectively prevent heat and oxygen, and meanwhile, pyrophyllite can form a layer of stable and high-temperature-resistant ceramic barrier during combustion to cooperate with a carbon layer, so that the flame retardant property of the material is greatly enhanced.

The invention provides a silicon carbide whisker and application thereof. The silicon carbide whisker comprises a single-crystal fibrous main body and a silicon dioxide oxide layer covering the surface of the single-crystal fibrous main body, a block body is arranged at one end of the single crystal fibrous main body; the block body contains SiO2 (silicon dioxide) and SiC (silicon carbide). According to the silicon carbide whisker provided by the invention, through the arrangement of the silicon dioxide oxide layer, the interfacial affinity of the silicon carbide whisker and the oxide is improved, stress transfer is promoted, and a toughening mechanism is activated, so that the fracture toughness of a composite material is improved; meanwhile, the silicon dioxide oxide layer also protects the whiskers from oxidation or chemical erosion, and the enhancement effect is maintained. The block body is arranged at one end of the single-crystal fibrous main body, and the block body enhances the interface bonding force through a mechanical interlocking effect, so that the whisker pulling-out work is remarkably improved, the crack propagation resistance is optimized, and the toughness of the composite material is improved.