11results about How to "Cross-linked tightly" patented technology

The invention discloses a bending-resistant, high-rubber and wear-resistant anti-reflection film and a preparation method thereof. The anti-reflection film comprises a base material layer, a hardened layer, a high-refractive-index layer and a low-refractive-index layer which are sequentially stacked, the hardened layer is obtained by coating the base material layer with hardened layer coating liquid and then curing the hardened layer coating liquid; the hardened layer coating liquid is prepared from the following raw materials in parts by weight: 50-80 parts of hardened resin; 10 to 30 parts of flexible resin; 5-20 parts of a modified inorganic nanoparticle dispersion liquid; 3-6 parts of a first photoinitiator; 50 to 100 parts of a first solvent; wherein the flexible resin is flexible vinyl resin which is prepared by modifying epoxy vinyl ester resin through carbamic acid ester. According to the invention, optical design, formula design, thickness design and the like are carried out on a plurality of coatings, so that the requirements of appearance uniformity, hue uniformity and strong bonding force among laminated layers of the three coatings can be met, and the anti-reflection film has excellent antifouling, scratch-resistant, rubber friction-resistant and bending-resistant properties.

The invention discloses a preparation method of a high-barrier fresh-keeping film for food fresh-keeping packaging, belongs to the technical field of fresh-keeping film processing, and aims to solve the technical problem that the barrier property of a high-barrier fresh-keeping film to water vapor and oxygen and the tensile property of the high-barrier fresh-keeping film in the prior art need to be further improved. The preparation method comprises the following steps: adding barrier layer mixed particles, bonding layer mixed particles and a supporting layer material into a multi-layer co-extrusion extruder, carrying out melt extrusion, injecting into a multi-layer co-extrusion film machine, and carrying out blow molding to obtain the high-barrier-property preservative film which is compounded by five layers, namely a supporting layer, a bonding layer, a barrier layer, a bonding layer and a supporting layer from top to bottom, according to the invention, modified graphene is added into composite polyester of the barrier layer for modification, and waterborne polyurethane added with modified polysiloxane is prepared to obtain the bonding layer, so that the tensile property and the barrier property to water vapor and oxygen of the preservative film are further improved.

The technology comprises the following steps that firstly, a female die 1 and a female die 2 need to be manufactured, the female die 1 is provided with a corresponding product 1, the female die 2 is provided with a whole corresponding to the product 1 and the product 2, real-time machining is carried out through CNC according to the size specification and the shape standard of a 2D or 3D drawing, and then the product 1 and the product 2 are manufactured; according to a polyurethane product formed by two materials, only one bottom mold and two upper molds are manufactured by utilizing a silica gel mold copying process, the bottom mold and the upper mold 1 are firstly used for manufacturing a product 1, the product 1 does not need to be taken out, the upper mold 2 is directly replaced, and an adhesive and a release agent are not brushed, so that the production process is simple, and the production cost is low. The characteristic that the product 1 is just cured but not completely vulcanized is utilized, the material 2 is directly poured, and the finished product is taken out for vulcanization after the material 2 is cured, so that the two materials are crosslinked more tightly, the connection strength and the flash condition are obviously improved, and the mold manufacturing cost is effectively reduced.

The invention belongs to the technical field of carbon dioxide miscible-phase oil displacement, and particularly relates to a mixing reducer for carbon dioxide oil displacement as well as a preparation method and application thereof. The mixing reducer comprises a solvent and a solute, and the solute is formed by mixing a zwitterionic surfactant, a zwitterionic nonionic surfactant, an anionic sulfonate surfactant and a gemini nonionic surfactant. The mass ratio of the zwitterionic surfactant to the zwitterionic nonionic surfactant to the anionic sulfonate surfactant to the gemini nonionic surfactant is (3-9): (1-5): (5-12): (4-11). Four different types of surfactants are combined, due to the electrostatic attraction effect between electron groups of selected substances, a compact composite interfacial film of ionic crosslinking and nonionic filling is finally formed, the minimum miscible phase pressure of carbon dioxide in crude oil can be substantially reduced theoretically, and good environmental adaptability is achieved; and dissolution is not easy to occur at the reformation temperature.

The invention relates to the field of insole materials, in particular to a material special for plant fiber insoles and a preparation technology and application thereof.The preparation technology comprises the following steps that 1, raw materials are mixed and fully stirred to be uniform, and a mixture A is obtained; (2) adding alkalized plant fibers weighed in parts by weight into the mixture A, and uniformly mixing to obtain a mixture B; and (3) cooling the mixture B, adding isocyanate weighed in parts by weight, uniformly mixing, injecting into a preheated mold, and carrying out foaming molding to obtain the special material for the plant fiber insole. Compared with the traditional composite material of plant fiber and polyurethane, the insole material prepared by the invention not only has better compression resistance, but also can maintain higher tensile strength and bending strength.

This application relates to the field of flexible electronics technology, specifically to an ultrathin flexible electronic conductor material and its preparation method. The preparation method of the ultrathin flexible electronic conductor material is as follows: (1) adding conductive filler, dispersant and binder to deionized water, ultrasonically dispersing to obtain a conductive slurry, coating the conductive slurry on the surface of a flexible substrate layer, and drying and curing to obtain a flexible substrate layer with a conductive functional layer; (2) preparing a polyethylene terephthalate solution, coating the polyethylene terephthalate solution on the surface of the conductive functional layer, and curing to obtain the ultrathin flexible electronic conductor material. This ultrathin flexible electronic conductor material has low sheet resistance, high conductivity stability, excellent bending resistance and solvent resistance, and significantly improved tensile strength and elongation at break, exhibiting excellent mechanical properties, making it suitable for long-term reliable application of flexible electronic devices.

The present invention provides a hydrogel and a preparation method and application thereof. The hydrogel is a hydrogel based on cross-linking of alginate and gelatin molecules, and has good biocompatibility; after further modifying alginate by maleimidation, the cross-linking of alginate and gelatin molecules can be made tighter and more stable, thereby further effectively improving the mechanical properties of the hydrogel under the premise of ensuring the biocompatibility of the hydrogel, so that the hydrogel of the present invention has both excellent biocompatibility and mechanical properties. The hydrogel has good application effects in wound dressings and coatings of implantable medical devices, and the preparation method of the hydrogel has simple operation procedures, high repeatability, and is easy to realize industrialization, so that the hydrogel has strong practicality and is conducive to the large-scale application of the hydrogel.

The invention discloses photocatalyst fluorescent ink, and relates to the technical field of ink. According to the invention, the self-made fluorescent agent is frozen into microspheres, and titanium dioxide is adsorbed on the surface of the self-made fluorescent agent by using plasma, electrostatic spraying and microwaves, so that the stability of the ink is improved; then, through low-temperature plasma assisted radio frequency magnetron sputtering, cerium oxide is coordinated and chelated on the surfaces of the titanium dioxide microspheres, so that the visible light activity of titanium dioxide is improved, and ink can be catalytically degraded under visible light; wherein the self-made fluorescent agent is prepared from veratrone, pyrenecarboxaldehyde and boron trifluoride, so that the ink can display patterns only under infrared wavelength irradiation, is not easy to decompose by illumination under long-time infrared irradiation, and has better light stability. The photocatalyst fluorescent ink prepared by the invention has the effects of good confidentiality, light stability and degradability.

The present application relates to an intravascular embolization composition and its preparation method and application. The intravascular embolization composition comprises a complex formed by electrostatic action of a polycationic compound and a polyphenolic compound, a contrast agent and water. The intravascular embolization composition has a suitable gelation time, injection force and mechanical properties, can effectively load and release drugs, is not prone to radiological artifacts, and has good biocompatibility and degradability.

The invention relates to the technical field of polyurethane ceramics, and discloses a corrosion-resistant polyurethane ceramic and a preparation method thereof. The invention provides a method for preparing the corrosion-resistant polyurethane ceramic by adding epoxy bentonite, modified polyurethane, polyurethane, yellow clay and porcelain stone into a stirrer, stirring and mixing to obtain a mixture, then pouring the mixture into a ceramic embryo, cooling and obtaining the corrosion-resistant polyurethane ceramic. The triazole group and the carbamate obtained under the action of hexamethylene diisocyanate both have good corrosion resistance, and chitosan and polyurethane themselves have good corrosion resistance. During the process of adding and blending, the epoxy group in the epoxy bentonite reacts with the hydroxyl group in the modified polyurethane to cause a ring-opening reaction, so that the bentonite and the polyurethane are closely cross-linked and evenly distributed in the polyurethane ceramic, thereby further enhancing the corrosion resistance.

The present invention relates to a modified polyvinyl alcohol multifunctional hydrogel and a preparation method and application thereof. First, polydopamine is synthesized, then a polyvinyl alcohol / polydopamine dispersion is prepared, and then urea and tannic acid are added for cross-linking reaction, and finally a multifunctional hydrogel product is obtained. The test results show that the hydrogel has multiple functions such as antibacterial, adhesion, antioxidant, anti-swelling, self-healing, photothermal and plasticity, and the photothermal property can also help to further enhance the antibacterial effect of the hydrogel, playing a synergistic role. The preparation method of the present invention is simple and easy to implement. By regulating some process parameters, the various properties of the hydrogel can also be flexibly adjusted, thereby enriching the types and uses of hydrogel products.