64results about How to "Moderate bond strength" patented technology

The invention relates to a method for preparing magnetic silicon dioxide microspheres with the surfaces chelated with metal ions; the method of the inventioncomprises the following steps of preparation of the magnetic silicon dioxide microspheres, epoxidation of the magnetic silicon dioxide microspheres, carboxylation of the magnetic silicon dioxide microspheres and chelation technique of metal ions. Compared with the existing preparing method, the method of the invention has the advantages of reasonable design, simple operation and large amount of chelation of metal, etc. The magnetic silicon dioxide microspheres with the surfaces chelated with the metal ions, which are prepared by adopting the method, contain cobalt ions, have stronger bonding force with the modified microspheres so as to lead the cobalt ions to be not easy to leak out, and have higher selectivity and proper bonding strength with histidine on the protein, thus leading the magnetic silicon dioxide microspheres with the surfaces chelated with the metal ions to have high selectivity to hexameric histidine tag protein, and being easy to realize the separation and the purification of the target protein; the magnetic silicon dioxide microspheres with the surfaces chelated with the metal ions, which are prepared by adopting the method, can be used for separating the hexameric histidine tag protein.

The invention relates to a polyionic liquid adhesive which comprises cations and anions, the cations are formed by polymerizing ionic liquid monomers, and alkoxy side groups are contained on structural chains of the cations. Polyionic liquid formed by polymerizing alkoxy functionalized ionic liquid monomers can form very strong hydrogen bonds with the surfaces of most of adhered substrate materials, so that relatively strong adhesive force is brought; meanwhile, hydrogen-bond interaction between the alkoxy side groups and active protons on an imidazole ring or a pyridine heterocyclic ring possibly exists in the polyion liquid adhesive to form a physical crosslinking structure with certain strength, so that the cohesion of the adhesive is improved to a certain extent. Under the combined action of the two aspects, the polyionic liquid adhesive provided by the invention shows excellent adhesive property.

The invention discloses a high-toughness 3D printing paraffin forming material. The high-toughness 3D printing paraffin forming material is prepared from components of raw materials in percentage by mass as follows: 30%-50% of paraffin, 2%-5% of bee wax, 5%-10% of epoxy resin, 2%-3% of a curing agent, 2%-20% of a viscosity modifier, 20%-30% of a toughening polymer, 6%-25% of a high-hardness polymer, 2%-4% of a filling material, 0.1%-0.3% of dyes and 2%-4% of a phase transferring agent. The bee wax is added to physically modify a paraffin support material, and the impact toughness of the paraffin support material is effectively improved; meanwhile, epoxy resin and the corresponding curing agent are added, and the adding quantity of the epoxy resin and the adding quantity of the corresponding curing agent are adjusted, so that the bonding strength of the paraffin support material and a 3D printing product interface is moderate while the hardness and the strength of the paraffin support material are improved and the shrinkage is reduced, and the paraffin support material is easy to peel off, doesn't deform and doesn't affect the support function on the 3D printing product in the printing process when removed in the later period. The toughening polymer and the high-hardness polymer are added to the paraffin support material, the needle penetration of the material can be effectively reduced, the toughness of the material is improved, and the high-toughness 3D printing paraffin forming material has excellent overall properties.

The invention discloses UV-moisture dual-curing liquid optical cement. The UV-moisture dual-curing liquid optical cement is prepared from, by weight, 45-80 parts of UV moisture curing matrix resin, 10-50 parts of tackifying resin, 10-35 parts of reactive diluents, 0.3-5 parts of photoinitiator and 1-5 parts of additive. The matrix resin and the tackifying resin have unique molecular structures. The invention further provides a preparation method of the UV-moisture dual-curing liquid optical cement. The preparation method comprises the following steps that the matrix resin and the tackfying resin are prepared; then all the materials are placed in a planetary vacuum mixer and are stirred and mixed to be uniform, and the finished product is obtained through filtering and defoaming. The problem of cement overflow that common liquid optical cement cannot overcome and the problem that the common liquid optical cement is not suitable for the special lamination process of UV precuring, lamination and moisture curing for cement overflow prevention are solved, a cement film formed by the UV-moisture dual-curing liquid optical cement after primary UV curing has moderate bonding strength and a good locating effect, the bonding strength is greatly improved after moisture curing, the surface of the cement film is very smooth, a certain edge shape is kept, no edge collapse phenomenon occurs, and the UV-moisture dual-curing liquid optical cement is suitable for automatic equipment coating.

The invention relates to modified PVB resin powder and a preparation method thereof. The modified PVB resin powder is prepared by adding an antioxidant, an ultraviolet absorber, a surface tension regulator and nano oxide which can be uniformly dispersed in resin powder in the synthesis process of PVB resin powder which is a raw material, so that the problem of non-uniform dispersion of nanoparticles and auxiliaries in the resin powder is solved, and production efficiency of extrusion and casting of PVB films is improved; blending and premixing links are omitted, so that powder pollution is avoided. The modified PVB resin powder prepared by the method has excellent temperature resistance, heat insulativity and infrared rejection rate and moderate bonding strength.

The invention provides an ultraviolet curing liquid optical adhesive as well as a preparation method and application thereof. The intrinsic solid shrinkage rate of the ultraviolet curing liquid optical adhesive is 0.6% or below. The ultraviolet curing liquid optical adhesive comprises tackifying resin, an active oligomer, an active diluent and a photoinitiator, wherein the tackifying resin has a structure as shown in a formula I which is described in the specification. The ultraviolet curing liquid optical adhesive can reduce curing shrinkage and reduce the mura risk of yellow spots in a liquid crystal touch screen attaching process.

The invention provides a thermal composite light polyurethane film which comprises a hot melt adhesive layer, a wet-process polyurethane layer and a dry-process polyurethane cover layer which are composited in sequence from bottom to top. The melting temperature of the hot melt adhesive layer is lower than that of the wet-process polyurethane layer and the dry-process polyurethane cover layer. The polyurethane film provided by the invention can be composited with various substrates by hot press welding, and has the advantages of simple structure, convenience in use, flexible application, light weight, high softness, easiness for processing and the like.

The present invention discloses a feed for promoting intestinal development of meat chickens in a fattening period. The feed comprises the following raw materials in parts by weight: 3-7 parts of microcrystalline cellulose, 3-5 parts of modified soybean proteins, 4-6 parts of salted duck egg yolk, 3-7 parts of puffed soybeans, 4-10 parts of soybean cake, 12-20 parts of rapeseed meal, 12-18 parts of rapeseed cake, 4-8 parts of lard, 25-55 parts of corn, 10-16 parts of wheat, 3-9 parts of malt powder, 4-12 parts of corn stalks, 1.5-2.5 parts of vital gluten, 1.5-2.5 parts of coix chinensis, 1.5-2.5 parts of haw powder, 0.5-1.5 parts of unprocessed rehmannia roots, 1.5-2.5 parts of grape leaves, 0.6-1 part of barley malt, 0.4-1 part of red date, 1.5-2.5 parts of honey, 1.5-3.5 parts of spirulina platensis powder, 1.5-2.5 parts of soybean lecithin, 1-3 parts of malt selenium, 0.2-0.8 part of red chili powder, 0.4-0.8 part of vitamin, 1.5-2.5 parts of calcium hydrogen phosphate and 2-4 parts of stone powder.

The cold-pressurized adhesive paper tape consists of paper substrate and adhesive layer painted onto the surface of the paper substrate. The adhesive consists of natural latex of a 60% solid content, copolymer of vinyl acetate and acrylate and with a 45% solid content, soft water or distilled water and marketable rubber antiager. The cold-pressurized adhesive paper tape is mainly used in producing braid for film capacitor, resistor and other small electronic elements. It has proper adhering strength and will not produce residual on electronic elements and pollutant to other article.

The invention relates to the field of preparation of photovoltaic cells and discloses an organosilicone composition, a reflecting coating, a preparation method therefor and a photovoltaic module comprising the reflecting coating. The organosilicone composition contains basic polymerization ingredients, a catalyst, a cross-linker and reflecting particles, wherein the basic polymerization ingredients, the catalyst and the cross-linker are not simultaneously mixed before use, the basic polymerization ingredients contain the ingredients in parts by weight: 100 parts of polymethyl siloxane, of which each molecule contains at least two Si-Vi bonds, 5-15 parts of hydrogenated epoxy resin or alicyclic epoxy resin modified hydroxyl-terminated polymethylvinylsiloxane and 10-20 parts of siloxane resin containing at least two Si-Vi bonds, and the cross-linker is polyorganosiloxane containing at least two Si-H bonds. According to the organosilicone composition, the adhesion of the reflecting coating can be improved while the curing time of the reflecting coating prepared from the organosilicone composition is shortened.

The invention discloses a Pr<3+>:Y2SiO5/TiO2 photocatalytic composite film based on a glass fiber filter film carrier, a preparation method and an application thereof. The composite film is formed by loading 1% (mol) Pr<3+>:Y2SiO5/nano TiO2 on the surface of a glass fiber film, so that the photocatalytic performance of the material is improved by utilizing the synergistic effect of the glass fiber and the Pr<3+>:Y2SiO5. The composite film has good chemical stability, the advantages of Pr<3+>:Y2SiO5 and nano TiO2 photocatalyst can be effectively utilized, the pohotocatalytic degradation under the visible light can be carried out, and the energy is saved.

The invention relates to a sound-insulation PVB photographic film and a preparation method thereof. The sound-insulation PVB photographic film is formed by compounding three layers of films A, B and C, wherein the thickness of the middle-layer film B is 100-200 microns, the thickness of the film A outside the film B is 300-500 microns, and the thickness of the film C outside the film B is 300-500 microns; and the middle-layer film B is prepared from modified PVB resin powder with a fusion index of 6g/10min-10g/10min, and the film A and the film C are prepared from modified PVB resin powder with a fusion index of 4g/min-5g/10min. The prepared three-layer sound-insulation PVB photographic film is capable of effectively blocking noise within in a human ear-sensitive range of 1000Hz-4000Hz, and compared with PVB with a conventional thickness, the sound-insulation effect can be increased by 3dB-5dB.

The invention discloses a wave-absorbing ceramic-based composite material with a multi-scale toughening and layering structure and a preparation method thereof. The preparation method comprises the following steps: deposition of an interface layer, introduction of a one-dimensional nano toughening phase, design of a layering structure preform, suction filtration and impregnation of a precursor, and cracking. A one-dimensional reinforcing phase is introduced into the continuous fiber reinforced ceramic-based composite material in situ, and multi-stage toughening of the ceramic-based composite material is achieved. The one-dimensional nano reinforced phase is introduced through in-situ growth before the fiber preform is formed, so that the nano reinforced phase is uniformly distributed in the ceramic-based composite material while relatively strong binding force between the one-dimensional nano structure and the fiber is ensured, the designability of the microstructure of the composite material is improved, and the preparation period is shortened. The nano wave-absorbing agent is in gradient distribution in the composite material by adopting a suction filtration and impregnation process, the excellent wave-absorbing performance of the material can be ensured, meanwhile, a preform is prepared by adopting a layering process, a special-shaped component can be designed and prepared, and the design requirements of aerospace hot-end components can be met.

The invention discloses a preparation method for complexing agent to WCp reinforcing steel-base surface composite material, which comprises 15-30% thermosetting water-soluble phenolic resin and borax, 1-7% mixture of 300 item aluminum powder, 300 item high carbon ferro-chrome and 270 item ferro-molybdenum powder, and water. The product has well wettability with WC particle, proper binding strength, low foam quantity, little bad residue, and strong function to eliminate defect between metal body and particle, and sets base for casting-osmosis method to prepare the said composite material.

The invention discloses a surface protection material for an engine containment ring. The surface protection material is a putty-like material composed of a component A and a component B, wherein thecomponent A is prepared from 70-80 wt.% of bisphenol A epoxy resin, 10-20 wt.% of nitrile butadiene rubber, 5-15 wt.% of milled asbestos fiber, 0-5 wt.% of fumed silica and 0.5-2 wt.% of silane coupling agent; and the component B is prepared from 90-99 wt% of polyamide resin and 1-10 wt% of aliphatic amine, wherein the component A and the component B are proportioned according to a mass ratio of 1:1-2:1. When in use, the component A and the component B are uniformly mixed, are applied to the surface of a part by adopting a blade coating method, and are cured to form a protective coating. The protective material has proper bonding strength and good water resistance, does not corrode four metals of TC4, GH232, 2A70 and 0Cr18Ni9Ti, and can be appllied to the inner surface of the engine containment ring.

The invention discloses a Chinese herbal medicine-containing feed used for beef cattle and having good palatability. Raw materials of the feed comprise northeast Leymus Chinensis, millet flour, corn flour, red bean powder, wheat bran, lotus root starch, white radish powder, fish meal, shell powder, modified soybean protein isolate, composite Chinese herbal medicines, composite vitamins, sodium hydroxymethyl cellulose, galactooligosaccharides, sucrose, frankincense essence, chicken's gizzard membrane, oregano oil, inositol, calcium dihydrogen phosphate, sodium bicarbonate, vegetable oil and edible salt. The Chinese herbal medicine-containing feed used for beef cattle and having good palatability has the advantages of reasonable formula, high utilization rate, good palatability, long storage period, stable performances, effective prevention of diseases, improvement of the physique of the beef cattle, promotion of the growth of the beef cattle, improvement of the beef quality, and increase of the economic and social benefits of beef cattle breeding.

The invention discloses a compound feed for improving mutton quality. The compound feed comprises the following raw materials in parts by weight: 90-100 parts of a plant main material, 10-20 parts of meat and bone meal, 2-8 parts of molasses, 2-5 parts of a sodium alginate compound, 1-3 parts of zeolite powder, 0.5-1.5 parts of sepiolite powder, 2-6 parts of corn oil, 0.25-0.45 part of vitamins, and 0.04-0.09 part of trace elements. The sodium alginate compound is prepared through the following technology: drying turf, adding anhydrous calcium carbonate, performing stirring to obtain a mixture, sending the mixture to an anaerobic Muffle furnace, performing heating, performing heat insulation, performing natural cooling to normal temperature, performing grinding, adding carboxymethyl cellulose, sodium alginate and water, performing stirring, adding calcium chloride and aluminium chloride, performing stirring, adding divinyl sulfone, performing stirring, performing filtering, performing washing, and performing drying so as to obtain the sodium alginate compound. The compound feed is low in cost, reasonable in formula and rich in nutrition, and can stimulate the appetite and the absorption function of the sheep at a fattening period, effectively strengthen the constitutions of the sheep and improve the mutton quality.