5results about How to "Strong process applicability" patented technology

This invention discloses a photothermal responsive multifunctional composite coating, its preparation method, and its application, relating to the field of antibacterial nanomaterials technology. The composite coating comprises an electrophoretic deposition onto a substrate using an electrophoretic solution formulated with chitosan and electrospun short fibers. The electrospun short fibers are prepared by electrospinning a spinning solution formulated with polylactic acid and a core-shell composite material, followed by plasma treatment and fluffing. The core-shell composite material is a composite material with a silver nanorod core and a mesoporous silica shell; wherein the silver nanorods encapsulate gold bipyramidal seeds. The core-shell structured silver nanoparticle antibacterial agent provided by this invention significantly alleviates the problems of cytotoxicity of silver nanoparticles and limited functionality as a surface modification material for bone implants.

The invention provides a composite carbon black material for artificial stone as well as a preparation method and application thereof, the composite carbon black material for artificial stone comprises the following raw materials in parts by weight: 10 parts of carbon black and 3 parts of a siloxane complexing agent, the moisture content of the composite carbon black material is less than 1%, and the particle size is less than or equal to 10 microns. The composite carbon black material for the artificial stone can be applied to production of quartz plates, and the composite carbon black accounts for 2-6% of the mass of the quartz plates. According to the composite carbon black material for the artificial stone as well as the preparation method and the application of the composite carbon black material, the compatibility with a quartzite base material can be enhanced, and the water absorption rate of a plate is reduced, so that the anti-knock performance and the waterproof and impermeable performance are improved.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a catalytic synthesis method of functional special polyether with narrow molecular weight distribution. The method comprises the following steps: by taking C1-C12 alcohol as an initiator, carrying out polymerization reaction with epoxide under the action of an organic catalyst, so as to prepare the functional special polyether with narrow molecular weight distribution. According to the invention, by designing an organic catalyst with a molecular structure containing phosphorus-boron (P-B) double active centers, not only is efficient catalytic ring-opening polymerization of alkylene oxide realized under a low-temperature condition, but also a special polyether product with high molecular weight and narrow molecular weight distribution is prepared. Meanwhile, by using the organic catalyst, the problems that a commercial DMC system is prone to inactivation, complex in mechanism and metal residues exist in ethylene oxide polymerization can be solved, and the application range of PAG in the fields of cosmetics, medicine and food-grade oil is widened.

The invention discloses a phased array ultrasonic scanning device and system for transverse defect detection of a medium-and-large-diameter pipeline welded joint and a using method.The scanning device comprises a handle, a scanning device host, a probe clamping module, a magnetic wheel and a control cable interface, the handle is arranged on the upper portion of the scanning device host, and the probe clamping module is arranged in the center of the interior of the scanning device host; clamping the phased array probe; four magnetic wheels are arranged at the lower part of the scanning device host and are connected with a servo motor in the scanning device host; the upper portion of the rear side of the scanning device host is provided with a multi-core control cable interface, the control cable interface is matched with a control cable, one end of the control cable is inserted into the control cable interface, and the other end of the control cable is inserted into a phased array detector interface. And connection and communication between the scanning device and the phased array detector are realized. The method is good in process applicability, high in universality, high in detection precision, high in detection speed, high in detection efficiency and convenient to maintain and upgrade.

This invention discloses a method for recycling waste polyurethane materials and a method for preparing polyurethane products, belonging to the technical field of waste polyurethane material recycling and reuse. The recycling method includes: a powder preparation stage, where waste polyurethane materials are pulverized using a pulverizing device to obtain polyurethane powder; a premix preparation stage, where the polyurethane powder is mixed with a degrading agent, catalyst, and co-solvent in a specific ratio, and then mixed uniformly using a stirring device to obtain a premix with a certain powder content; and a degradation stage, where the premix is ​​ground, extruded, and sheared using equipment with mechanical shearing and extrusion functions, the reaction process is carried out within a set temperature range, and after the reaction is completed, a degraded polyurethane mixture is obtained. In the method for preparing polyurethane products, part or all of the polyol raw material is taken from the degradation mixture. This invention achieves low reagent consumption, low temperature and short time degradation, no need for gas protection, and no generation of toxic substances such as aromatic amines. The resulting high-performance heterogeneous polyol can be directly used in the preparation of polyurethane products without any post-processing.