7results about How to "Strong process versatility" patented technology

The application relates to a method for ultrasonic-assisted construction of a magnetic liquid metal complex structure, which comprises the following steps: a soluble resin positive mold with a target complex spatial structure is manufactured by adopting a digital light processing 3D printing technology; an elastic PDMS mold with a three-dimensional closed cavity is prepared by adopting a PDMS reverse mold technology; neodymium iron boron magnetic particles are mixed with liquid metal gallium to prepare a uniform magnetic liquid metal composite material; the PDMS mold is installed on an ultrasonic coupling platform, the magnetic liquid metal composite material is injected into the pouring port of the mold, and an ultrasonic wave field is applied to the PDMS mold during the pouring process; and the PDMS mold is dissolved by using a solvent at a temperature lower than the melting point of the magnetic liquid metal, so that an independent magnetic liquid metal complex three-dimensional structure is obtained. The application realizes physical intervention on the flow state of the liquid metal and dynamic regulation on the spatial distribution of particles by using ultrasonic vibration field pouring of the magnetic liquid metal, and improves the filling capacity and morphology fidelity of the liquid metal in the three-dimensional complex structure.

The invention discloses a method for preparing vinyl ether by taking ethylene glycol as a raw material. According to the method, industrial raw materials including ethylene glycol and alkyl alcohol which are low in price are adopted, a solid acid catalyst and a solid base catalyst are used for catalyzing an etherification reaction and a cracking reaction respectively, and therefore the vinyl ether product with the high additional value is prepared. The method is good in economic benefit, and the technology and the device are high in universality; a green reaction process is adopted, the process is safe and environment-friendly, and the device can be large-scale; the cracking byproduct alcohol is recycled as an etherification reaction raw material, the raw material utilization rate is high, and energy utilization is reasonable.

The application discloses an antibacterial bio-based polyamide elastomer and a preparation method thereof. The preparation method comprises the following steps: preparing a polyamide prepolymer containing a tertiary amine structure through ring-opening polymerization reaction of caprolactam, N-diethyl-aminocaprolactam and sebacic acid, then reacting with polytetramethylene ether glycol to form a polyamide-polyether block copolymer elastomer, and further modifying the polyamide-polyether block copolymer elastomer through reaction with a halogenated hydrocarbon to realize quaternary ammonium modification, so that the quaternary ammonium salt antibacterial group is stably introduced into the polymer molecular structure in a covalent manner. The bio-based polyamide elastomer prepared by the application has excellent elastic properties and persistent and stable quaternary ammonium antibacterial properties, the antibacterial components are not easy to migrate and lose, the preparation process is simple and controllable, is suitable for the field of functional materials, and has a good application prospect.

The application relates to a CMP composition for obtaining a high-quality SiC single crystal substrate surface, which is prepared from the following raw materials in percentage by weight: 20-50 wt% of polishing abrasive, 3-5 wt% of oxidizing agent, 0.1-0.5 wt% of surfactant, 0.2-0.5 wt% of hydrogen bond regulator, 0.2-1 wt% of polishing accelerator, 0.01-0.05 wt% of defoaming agent, and the balance of water; the CMP composition is neutral. The CMP composition uses silicon oxide as the abrasive, introduces the hydrogen bond regulator, the polishing accelerator and the oxidizing agent, improves the polishing rate of the silicon carbide wafer CMP, realizes that the surface roughness Ra of the silicon surface after cleaning can reach below 0.07 nm, the surface after cleaning is free of large particles (>0.2 um), meanwhile, the silicon oxide raw material does not need to be treated, has excellent long-term storage stability, and the system does not have the phenomena of particle agglomeration and sedimentation with the prolongation of the storage time, and excellent polishing surface quality can be obtained in the subsequent polishing process.

The application discloses a kind of anti-impact nylon fibre for spacesuit and its preparation method, comprising: high molecular weight nylon 66 matrix 86.0-92.0wt%, multi-dimensional nano reinforcing phase 1.2-2.0wt%, multifunctional anti-impact microsphere 4.0-7.0wt%, in-situ interface compatibilizer and crosslinking point regulator 0.5-1.2wt%, aerospace-grade multifunctional stabilizing aid: 1.0-2.8wt%;The multi-dimensional nano reinforcing phase is compounded by amino graphene and amino carbon nanotube according to mass ratio 1:3-4;The multifunctional anti-impact microsphere is hollow polysiloxane-titania composite microsphere, the anti-impact nylon fibre for spacesuit and its preparation method disclosed by the application can realize the multifunctional integration of nylon fibre, meet the demand of space suit fibre.

A zinc-based high-strength outer sheet with excellent formability and equipped with a GI or ZM coating, and its manufacturing method, are disclosed. The chemical composition of the steel, by mass percentage, is as follows: C: 0.04%–0.1%, Si: 0.2%–0.5%, Mn: 1.2%–1.8%, P≤0.02%, S≤0.01%, Al: 0.02%–0.05%, Cr≤0.5%, Nb≤0.02%, N≤0.006%, with the balance being Fe and unavoidable impurities. The content of Si, Mn, and Cr satisfies the condition: (Mn+Cr)−2×Si≥0.5%. This method, through optimized composition design and precise control of the annealing-galvanizing process, synergistically solves the core contradiction of achieving high strength, high formability, and high surface quality in high-strength outer sheets. In particular, it effectively inhibits surface oxidation of the substrate, ensuring the uniformity, density, and adhesion of the coating, and can stably produce high-quality outer sheet products suitable for pure zinc (GI) and zinc-aluminum-magnesium (ZM) coatings.

The utility model provides a kind of metal box body fillet bending forming jig, including lower jig and upper jig, curved groove for making box body plate form fillet is equipped in the length direction of the upper part of the lower jig, the bottom of the upper jig is equipped with the stamping part matched with the curved groove along length direction.The utility model adopts the overall structure of upper and lower jig cooperation, and the right angle edge of metal plate can be quickly processed into smooth fillet by one stamping stroke, realizing one forming.Changes the inefficient mode of needing multiple bending to approach circular arc profile in traditional process, greatly improves production efficiency, and reduces the dependence on complex programming and debugging skills of operator.