349 results about "Synthetic materials" patented technology

A hinge comprising: a first hinge member (110) comprising a cylinder barrel (117) having a longitudinal direction (118); a second hinge member (111) pivotably mounted on the first hinge member (110); and a dashpot interposed between said hinge members (110, 111) and configured for damping a closing movement of said closure member. The dashpot comprises a closed cylinder cavity formed within the cylinder barrel (117); a damper shaft (124) which extends into the cylinder cavity and is connected to the second hinge member (111); and a piston (147) within said cylinder cavity. The hinge members (110, 111) are made of a synthetic material and the damper shaft (124) is made of metal.

The present invention relates to the technical field of seawater desalination membranes, and discloses a durable seawater desalination membrane and a preparation method thereof. The present invention uses pentaerythritol as an initiator, uses propylene oxide and ethylene oxide as raw materials to synthesize a hyperbranched polyether, and then undergoes an ester exchange reaction with 2-aminoethyl acetate to synthesize a modified hyperbranched polyether. The ZIF-8 material is then synthesized by a hydrothermal method, and MoS2 nanosheets are coated on its surface to obtain a MoS2 / ZIF-8 composite material, which is then surface-modified by a silane coupling agent to obtain a modified MoS2 / ZIF-8 composite material. Finally, a casting solution is formed using polysulfone and a modified MoS2 / ZIF-8 composite material to obtain a base membrane, and the base membrane is then sequentially immersed in an aqueous phase solution and an oil phase solution to form a polyamide film layer, thereby obtaining a durable seawater desalination membrane. The seawater desalination membrane prepared by the present invention has excellent water flux, desalination rate and durability.

Methods of synthesizing MOF materials are disclosed. Further, plasmonic MOF composites and uses thereof as a recyclable catalyst, for ultrafast desorption (e.g., of solvents), MOF activation are also disclosed.

The invention provides an anti-erosion refractory material for calcination of an aluminum ash rotary kiln and a preparation method of the anti-erosion refractory material, and relates to the technical field of refractory materials. Comprising the following raw materials in percentage by mass: 20%-70% of flint clay with the particle size of 0-5mm, 5%-40% of synthetic mullite with the particle size of 0-5mm, 5%-20% of synthetic mullite powder with the particle size of 0-0.074 mm, 1%-20% of silica powder with the particle size of 0-0.074 mm, 1%-15% of synthetic material powder with the particle size of 0-0.074 mm and 1%-15% of clay with the particle size of 0-0.074 mm. According to the anti-erosion refractory material for calcination of the aluminum ash rotary kiln and the preparation method thereof, a high-viscosity glass phase is generated in situ, and a dynamic protection layer is formed on the surface of the refractory material to prevent permeation of harmful gas, so that the thickness of a metamorphic layer is reduced, damage to a refractory product is slowed down, and the service life is prolonged; through the synergistic effect of the silica powder and the synthetic powder, the refractory material can be sintered at a low temperature, and the production energy consumption is reduced.

The invention belongs to the technical field of polymer synthetic materials, and particularly relates to bio-based MS resin and a preparation method thereof. The bio-based MS resin is a free radical copolymer of a methyl methacrylate monomer and a styrene monomer; the methyl methacrylate monomers comprise bio-based methyl methacrylate, isobornyl methacrylate and 3-pinane methacrylate, and the methyl methacrylate monomers comprise methyl methacrylate, isobornyl methacrylate and 3-pinane methacrylate; the styrene monomers comprise styrene and caffeic acid derivatives; based on 100% of the mass of the bio-based MS resin, the methacrylate monomer accounts for 30%; the molar ratio of caffeic acid derivatives to styrene in the styrene monomers is 1: (1-9). The synthesized bio-based MS resin has the characteristics of greenness and reproducibility, compared with petroleum-based MS resin, the performance of the MS resin can be regulated and controlled by designing a protecting group of a bio-based caffeic acid derivative so as to expand the application range of the MS resin, a specific functional group can be introduced to prepare a functional, advanced and high-performance polymer material, and the MS resin has a good market prospect.

The invention discloses composite hydrogel bio-ink with a function of space-time delivery of double growth factors as well as a preparation method and application of the composite hydrogel bio-ink, and belongs to the technical field of biomedical materials and tissue engineering. According to the preparation method, imidazolyl-modified methacrylated gelatin and double-bonded PF127 are compounded, and meanwhile, free vascular endothelial growth factors and connective tissue growth factor-loaded PLGA microspheres are entrapped in a system, so that the bio-ink with excellent printability, high adhesion, swelling resistance and space-time delivery function is formed; the bio-ink physically has the advantages of high printing fidelity, low swelling property, high mechanical strength and strong tissue adhesion of a synthetic material; in biology, the system can be used as an intelligent carrier to realize programmed space-time delivery of various growth factors, so that complex cell biological behaviors are accurately arranged, and real regeneration of functional tissues is guided.

The utility model discloses a testing device which comprises a weight disc and further comprises a vertical frame, the front face of the vertical frame is provided with a limiting sliding groove, and a screw rod is installed in the limiting sliding groove in a threaded mode. The measuring mechanism comprises a first sliding block and a bracket, the upper end of the bracket is fixedly connected with the lower portion of the first sliding block, the first sliding block is installed in the limiting sliding groove in a sliding mode, and the weight disc is placed on the bracket; and the jacking mechanism comprises a second sliding block and a damping telescopic rod, the second sliding block is installed in the limiting sliding groove in a sliding mode, and a threaded sleeve block and a clamp are installed on the second sliding block in an embedded mode. Through the self weight of the weight disc and the measuring mechanism and the downward pulling force applied to the organic synthetic material, under the condition that the organic synthetic material deforms, the pulling force applied to the organic synthetic material does not change due to the fact that the overall mass of the weight disc and the measuring mechanism is not changed; and the organic synthetic material with high deformation capability can be effectively tested.

The present invention discloses a breach rapid plugging device and method based on rocket anchors and polymer composite materials, which relates to the technical field of plugging breaches in water conservancy projects, including broken dike heads on both sides of the breach, and the outer periphery of the broken dike heads on both sides is provided with a wrapping structure, the wrapping structure includes a first line of protection and a second line of protection, the second line of protection is connected to a fixed structure, and the fixed structure is arranged on the broken dike head; an entry and closure structure is arranged between the wrapping structures on both sides, and the two ends of the entry and closure structure are connected to the wrapping structures on both sides. The present invention adopts the above-mentioned breach rapid plugging device and method based on rocket anchors and polymer composite materials, adopts a large geotextile to stabilize the dike head, rocket anchors and polymer geosynthetics to quickly plug the breach, and finally adopts a rubber bag to be filled with water for covering and pressing, which further improves the stability of the wrapping head, and has the advantages of fast plugging speed and high efficiency.

In one aspect, a composition is disclosed that includes an agglomeration of a plurality of porous microparticles forming a hierarchically porous material structure. The porous microparticles can be formed of a biogenic and / or a synthetic material. In some embodiments, a plurality of binder can be distributed among the microparticles to facilitate the agglomeration of the plurality of the microparticles.

A floor covering, made of floor elements, which, at least at two opposite sides, includes a male coupling part and a female coupling part, which allow that two of such floor elements to be interconnected by pushing one of these floor elements with the associated male coupling part, by a downward movement, home into the female coupling part of the other floor element. At least one of the coupling parts, either the male coupling part or the female coupling part, is made as least partially in a filled synthetic material composite, such as extruded wood.

The fluidic device (1) comprises a tubular end portion (9) of a first pipe (7), this portion (9) being essentially made from synthetic material and having at least one electrically conductive inner surface (25), as well as an outer surface (27), a connector (17), suitable for a second pipe (11), the connector (17) comprising an electrically conductive tubular insert (19), received in the end portion (9) of the first pipe (7) and in contact with at least part of the inner surface (25) thereof.

The invention relates to the technical field of conveying equipment, and particularly discloses an automatic material conveying device for polyurethane plastic track synthetic material production, which comprises a conveying mechanism, the conveying mechanism comprises a conveying pipe, a driving assembly, a feeding hopper and a discharging hopper, the discharging hopper is provided with a telescopic charging barrel, and the telescopic charging barrel comprises a dustproof part and a plurality of blanking assemblies. The blanking assembly comprises connecting pieces and at least two buffering pieces, the connecting pieces are annular, the upper ends of the buffering pieces are elastically connected with the connecting pieces, the buffering pieces incline in the direction close to the axial directions of the connecting pieces from top to bottom, any two adjacent connecting pieces are elastically connected, the dustproof piece comprises cover cloth and a plurality of connecting parts, the connecting parts are annular, and the connecting parts are arranged on the cover cloth. The connecting parts are longitudinally arranged at intervals and fixed relative to the cover cloth, and the connecting piece on the lowermost side is fixed relative to the connecting part on the lowermost side. According to the conveying device, materials are fully buffered in the discharging process, flying dust is reduced, the consistency of the abrasion degree in the using process of the buffering pieces is improved, and the service life is prolonged.

The offshore photovoltaic foundation anti-sinking device comprises an anti-sinking part and a conical rubber gasket, the anti-sinking part is in a plate shape, a penetrating reserved connector is formed in the middle of the upper surface of the anti-sinking part, the conical rubber gasket wraps the surface of a foundation pile in a surrounding mode, and the foundation pile is inserted into the reserved connector and fixed through the conical rubber gasket. The anti-sinking part has large overall rigidity and area, and the anti-sinking characteristic is obvious. The anti-sinking part adopts a land prefabricated finished product and is directly hoisted and installed after field positioning, the offshore operation difficulty is effectively reduced, the offshore operation time is saved, the overall rigidity and area of the anti-sinking part are large, the capacity of the photovoltaic foundation for resisting differential settlement can be effectively improved, meanwhile, the anti-sinking part is made of conventional reinforced concrete or rubber synthetic materials, and the cost is low. The cost is low.

An interchangeable stock panel insert system for attaching accessories to a firearm such as a long gun comprises an elongated stock formed of synthetic material including a forestock configured to support a receiver of the firearm. The forestock includes an internal longitudinal cavity forming an elongated longitudinal aperture at the bottom which provides injection molding benefits described herein to yield more uniform stock wall thicknesses. The forestock includes a singular mounting interface defined at the longitudinal aperture configured to detachably couple a plurality of different stock panel inserts thereto to enclose the bottom aperture and form part of the completed forestock. The panel inserts share a common mounting configuration compatible with the singular mounting interface of the forestock so as to be interchangeably mountable to the forestock. At least some of the stock panel inserts include an accessory rail for mounting various types of firearm accessories thereto.

A fiber-reinforced structure, especially a fiber reinforced concrete structure, includes a multitude of composite fibers distributed within a matrix of a construction material, especially a mineral binder based construction material, whereby each composite fiber includes non-metallic load-bearing fibres kept by and / or embedded in an organic synthetic material, and whereby each composite fiber has a linear density of 25-500 tex, especially 50-350 tex.

The present application relates to a kind of composite rotator cuff patch and its preparation method and application, belong to the field of biomaterials technology.The structure layer and biological layer are all biological medical materials, do not need to introduce crosslinking agent, and by the structure layer and biological layer alternate composite design, avoid the problem that traditional synthetic material is not degradable or short degradation period, with controllable degradation period, improve the tear resistance and mechanical support of patch, effectively reduce the risk of inflammatory response, improve the biocompatibility and safety of patch, finally realize the applicability and effect of improving composite rotator cuff patch in clinical application.

The invention relates to a prosthetic heart valve (100) for an endoprosthesis (1) used in the treatment of a stenotic cardiac valve and / or a cardiac valve insufficiency. The prosthetic heart valve (100) comprises of a plurality of leaflets (102), which consist of a natural and / or synthetic material and have a first opened position for opening the heart chamber and a second closed position for closing the heart chamber, the leaflets (102) being able to switch between their first and second position in response to the blood flow through the heart. In addition, the prosthetic heart valve (100) comprises a leaflet support portion (103), consisting of biological and / or synthetic material for mounting of the prosthetic heart valve (100) to a stent (10), and a bendable transition area (104) which forms a junction between the leaflets (102) and the leaflet support portion (103), the transition area (104) progressing essentially in a U-shaped manner similar to a cusp shape of a natural aortic or pulmonary heart valve for reducing tissue stresses during opening and closing motion of the leaflets (102). The invention further relates to an endoprosthesis (1) comprising a prosthetic heart valve (100) and a stent (10).

The invention belongs to the field of synthetic materials, and particularly relates to a high-activity hydroxylamine antioxidant and a preparation method thereof. The high-activity hydroxylamine antioxidant disclosed by the invention is simple in production process, mild in reaction conditions and high in reaction speed; compared with a traditional straight-chain hydroxylamine antioxidant with a single active center, the hydroxylamine antioxidant has the advantages of higher decomposition temperature, smaller addition amount and longer antioxidation effect acting time.

The utility model relates to the technical field of chemical synthetic material processing, and discloses an efficient reaction kettle for chemical synthetic material processing, which comprises a workbench, the lower surface of the workbench is fixedly connected with a sliding column, the outer wall of the sliding column is slidably connected with a supporting column, the outer wall of the supporting column is fixedly connected with a first bottom plate, and the first bottom plate is fixedly connected with a second bottom plate. A motor is fixedly connected to the upper surface of the first bottom plate, a two-way threaded rod is fixedly connected to the output end of the motor, a check block is rotationally connected to the outer wall of the two-way threaded rod, a supporting block is rotationally connected to the outer wall of the two-way threaded rod, and a supporting assembly is arranged on the upper surface of the workbench and used for supporting a hydraulic cylinder. According to the working table, the second rotating column drives the connecting block to move up and down, so that the working table is adjusted to a proper height, operators with different heights can find a proper working height, and the effects of reducing the working intensity and improving the working efficiency are achieved.

A more robust packaging structure for maintaining the integrity of compressible biologically active materials during storage and especially during transportation is provided. These containers protect the materials from shock, vibration, deformation, or separation from agitation. The compressible materials may be in the form of synthetic fibers, and may include a composite of fibers and beads or granules. Suitable materials that may benefit from such a robust packaging structure include synthetic materials that comprise a biologically active ceramic or glass.

The application discloses an oral nano-vaccine and a preparation method and application thereof, and relates to the technical field of immunology, and specifically discloses an oral nano-vaccine which comprises a nano-particle wrapped by a biomimetic bacterial membrane vesicle and an outer layer; the nano-particle comprises an antigen and a biodegradable polymer material; the biomimetic bacterial membrane vesicle comprises an ionizable flagellar lipoprotein, an immune adjuvant, a phospholipid, a sterol lipid and a polyethylene glycol lipid; and the outer layer is a pH-responsive polymer. The oral nano-vaccine provided by the application combines the immune activation advantages of natural bacterial membrane vesicles and the precise regulation characteristics of synthetic materials, significantly improves the transmembrane penetration capacity of the antigen in the intestinal epithelium and the overall activation effect of the mucosal immune system. The oral nano-vaccine provided by the application can protect the antigen and the immune adjuvant from degradation and realize precise release in the intestinal microenvironment; and the oral nano-vaccine significantly improves the bioavailability and safety of an oral tumor vaccine, and lays a key technical foundation for clinical transformation and large-scale production of the oral tumor vaccine.

A patch containing lotus root fibers is formed by covering collagen layers on the two sides of a lotus root fiber hydrogel synthetic material, the lotus root fiber hydrogel synthetic material is obtained by fusing 20-40 parts by mass of lotus root fibers (3) and 60-80 parts by mass of a hydrogel substrate, and the prepared patch has excellent mechanical properties, and can be used as a patch for repairing the skin. The problem that the abdominal pressure of a patient is excessively increased due to cough, defecation and the like after an operation is effectively solved, displacement and tearing are prevented, and the repair success rate is increased.

The application belongs to the technical field of chemical synthetic materials, and relates to an alkali metal ion intercalated transition metal chalcogenide compound as well as a preparation method and application thereof. x M m X n wherein A is one or more of alkali metal elements, and 0 < x < 1; M is one or more of transition metal elements, and m is 1-2; X is one or more of chalcogen elements, and n is 1-3; and the alkali metal ion intercalated transition metal chalcogenide compound is obtained by mixing and reacting an intercalation host transition metal chalcogenide compound, an intercalation guest alkali metal element-containing compound and an auxiliary metal intercalation agent.

The utility model discloses an ultrasonic cutting device and a machine tool, and relates to the technical field of ultrasonic cutting, the ultrasonic cutting device comprises a shell internally provided with a cavity and a pull rod capable of reciprocating along the axial direction of the pull rod, an energy converter, an energy converter shell and an amplitude-change pole are arranged in the cavity, the energy converter shell is provided with a containing cavity with an opening facing the front side, and the amplitude-change pole is arranged in the containing cavity. The transducer is installed at the rear end of the amplitude-change pole and arranged in the containing cavity, the front end of the transducer shell is fixedly connected with the amplitude-change pole, and the front end of the pull rod stretches into the cavity and is fixedly connected with the rear end of the transducer shell so as to drive the transducer shell, the transducer and the amplitude-change pole to synchronously move in the cavity. According to the ultrasonic cutting device, axial ultrasonic high-frequency vibration is generated through the transducer and the amplitude-change pole, so that the axial ultrasonic high-frequency vibration can be superposed on the basis of original low-frequency axial reciprocating motion of the cutter, and the cutting capacity of the ultrasonic cutting device is improved; the ultrasonic cutting device can cut thicker leather, woven cloth, non-woven fabric, paper, synthetic materials and the like.

The invention relates to a microbial single-cell gelation encapsulation method based on aloe gel and application, the method realizes single-cell gelation encapsulation through electrostatic interaction of sterile aloe gel and intestinal anaerobic bacteria (such as Agathobacter rectasis), and the method comprises the specific steps of aloe gel preparation, bacterial suspension culture and oscillation mixing to form a stable structure. The preparation method has the advantages that the acid resistance and biocompatibility of the natural aloe gel are utilized to replace a traditional synthetic material, so that the gastrointestinal tolerance of thalli is improved; meanwhile, the synergistic effect of aloe active ingredients (such as aloe-emodin) and intestinal bacterial metabolites (butyric acid) is combined, so that the anti-inflammatory and intestinal steady-state regulation and control effects are enhanced. Experiments show that the survival rate of the encapsulated bacteria in simulated gastric juice within 4 hours is larger than or equal to 90%, the intestinal colonization rate is effectively increased compared with naked bacteria, the inflammatory factor level of a colitis model mouse can be remarkably reduced, and a safe and efficient new strategy is provided for micro-ecological treatment of inflammatory bowel diseases.

The present invention relates to a method for identifying Aegilops tauschii-derived germplasm fragments by using an exon capture sequencing chip of the D genome of wheat crops. The method comprises the following steps: performing capture sequencing on the derivative introgression line material and the parents of the derivative introgression line material by using an exon capture sequencing chip of the pan-gene exons of the wheat D genome; aligning the capture sequencing data of the derivative introgression line material and the parents of the derivative introgression line material to the wheat reference genome to obtain a derivative introgression line material differential site file and a parental differential site file; filtering the parental differential site file against the introgression line material differential site file and retaining the intersection of the two differential site files; using the intersection file and the parental differential site file to calculate the exogenous introgression ratio of the derivative introgression line material within a window; using the introgression ratio file to draw a dot plot, and defining the region with continuous high introgression ratio as the exogenous fragment. The present invention can be accurately used for identifying exogenous fragments of introgression lines or synthetic materials derived from Aegilops tauschii.

The utility model discloses a water soluble paraffin removal ball, which relates to the technical field of paraffin removal balls and comprises a paraffin removal ball body, a cleaning agent storage component is mounted in the paraffin removal ball body and comprises a storage tank, a through hole, a chemical cleaning agent and a water soluble plastic film, the paraffin removal ball comprises a paraffin removal ball body, a storage groove is formed in the paraffin removal ball body, the storage groove is filled with a chemical cleaning agent, a plurality of through holes are formed in the outer side of the paraffin removal ball body and penetrate through the inner wall of the storage groove, and a water-soluble plastic film is installed on the inner side of one end of each through hole. The synthetic material of the paraffin removal ball body is ethylene vinyl acetate, and the paraffin removal ball body can be dissolved in a crude oil environment, so that the paraffin removal ball body can be automatically dissolved in an oil pipe after being used for 24 hours, the oil pipe is prevented from being blocked, the paraffin removal ball does not need to be found, and the paraffin removal ball is more convenient to use.

The utility model discloses a rapid dehydration device for chemical synthetic materials, which comprises a main body unit comprising a mounting plate, a table plate fixedly arranged on the mounting plate, a protective box clamped on the mounting plate, and a connecting frame fixedly arranged on the protective box; the working unit comprises a dewatering box arranged in a protection box, a connecting cylinder is fixedly arranged on the dewatering box, a mounting groove is formed in the protection box, a buckle component is arranged in the mounting groove, a rectangular plate is arranged on the buckle component, a working cylinder is arranged on the protection box, a connecting component is arranged in the working cylinder, an adjusting component is arranged on a connecting frame, and a starting framework is arranged on the mounting plate. During dewatering, the second motor can be turned on, the threaded block is driven to rotate through the connecting cylinder, the clamping block is attached to the clamping groove when the threaded block rotates to the top end, the dewatering box is fixed, and then the dewatering box can be driven to rotate for dewatering.

The present application relates to the field of chemical synthetic materials and catalysis, and particularly relates to a metal-amorphous structure chalcogenide core-shell nanocrystal and a preparation method and application thereof.The preparation method comprises the following steps: (1) synthesizing Au nanorods through a seed growth method; (2) coating silver on the surface of the Au, and epitaxially growing a silver shell layer nanocrystal; and (3) sulfidizing the silver shell layer nanocrystal, and performing hydrothermal cation exchange to obtain a core-shell structure nanocrystal.In the metal-amorphous structure chalcogenide core-shell nanocrystal, the amorphous surface to a certain extent is conducive to adsorbing reaction substrates, and promotes the progress of the photocatalytic carbon dioxide reduction reaction.The metal-amorphous structure chalcogenide core-shell nanocrystal has excellent gas-solid phase photocatalytic carbon dioxide reduction performance, and can achieve good effects without a photosensitizer and a sacrificial agent.