28 results about "Heat stabilization" patented technology

The application relates to the technical field of PET film, and discloses a conductive PET film material for a transparent antenna and a preparation method thereof, wherein the conductive PET film material comprises, from top to bottom, a copper mesh and a PET film; the PET film comprises the following components by weight: 80-90 parts of PET resin, 1-2 parts of a compatilizer, 8-14 parts of a flame retardant, 2-4 parts of an ultraviolet resistance agent and 0.8-1 part of a heat stabilizer; the flame retardant is composed of an organic phosphorus flame retardant and 4-amino-5-imidazole formamide. Through the technical scheme, the problems of poor flame retardance and ultraviolet resistance of the conductive PET film material in the related art are solved.

A method of producing a carbon-rich material, the method comprising the steps of: a) providing a lignin bead, wherein the lignin bead comprises at least 80 wt% of lignin, based on the dry weight of the lignin bead; b) optionally heating the lignin bead to one or more temperatures in the range of 140 to 270 °C for a period of at least 30 minutes to obtain a heat-stabilized lignin bead; and c) subjecting the optionally heat-stabilized lignin bead to carbonization at one or more temperatures in the range of 300 °C to 1500 °C, wherein the carbonization is carried out for a total time in the range of 30 minutes to 10 hours, so as to obtain a carbon-rich material.

The invention discloses a modified ETFE material and application thereof, and the modified ETFE material comprises 90-100 parts by mass of ETFE, 0.5-2 parts by mass of an anti-ultraviolet agent, 0.2-0.6 part by mass of an antioxidant, 0.2-1 part by mass of a light stabilizer, 0.2-1 part by mass of a heat stabilizer, 0.5-10 parts by mass of modified ATO and 3-12 parts by mass of a coupling agent. The modified ETFE material provided by the invention has the characteristics of excellent mechanical strength, weather resistance, self-cleaning property and the like, also has excellent infrared barrier property, and is particularly suitable for being applied to preparation of ETFE films for high infrared barrier buildings.

The invention discloses a novel composite phase change heat storage medium and a preparation method thereof, and is characterized in that the novel composite phase change heat storage medium comprises the following substances by weight: 70-75 parts of a phase change energy storage material, 0-8 parts of a heat conduction reinforcing material, 0-15 parts of a water sealing material, 5-10 parts of a modified material, 0-20 parts of a gel material, and 0-10 parts of deionized water. On the one hand, the composite phase change heat storage medium produced through reasonable component composition under specific production and processing conditions has the advantages of being good in heat stability, free of supercooling and phase separation phenomena, large in heat storage density, high in heat conductivity, not prone to volatilization of all component materials and the like;

The invention relates to the technical field of computational toxicology, and discloses a method for calculating combination of perfluorinated and polyfluorinated alkyl compounds and PPARalpha based on a pharmacophore model, which comprises the following steps: acquiring a PFAS initial data set, acquiring a PPARalpha ligand binding domain crystal structure, and optimizing the structure; selecting representative PFAS to carry out molecular docking, and carrying out simulated annealing optimization to obtain an optimal binding posture; then generating a pharmacophore model; the models are screened; performing rigid fitting screening by using a pharmacophore model; carrying out molecular dynamics simulation on the representative hit object, and verifying the stability; protein is extracted by culturing cells in vitro, a thermal displacement experiment is carried out, and the thermal stability effect of PFAS on PPARalpha is verified. According to the method, comprehensive virtual screening of PFAS-PPAR alpha interaction based on pharmacophores is provided, a calculation framework based on protein and compound structures is established, and the method is suitable for environmental pollutant screening and safer chemical design.

The invention discloses a heat-resistant biodegradable film-making material, which is prepared from the following ingredients in parts by mass: 30 to 60 parts of modified polylactic acid, 20 to 35 parts of toughening agents, 10 to 18 parts of multifunctional modifiers, 0.4 to 1.4 parts of nucleating agents, 3 to 5 parts of plasticizers and 0.3 to 0.8 part of bio-based chain extenders. 0.3-10 parts of a composite heat stabilizer and 4-15 parts of an antibacterial agent; the modified polylactic acid is prepared from the following components in parts by mass: 35 to 50 parts of polylactic acid, 5 to 25 parts of polypropylene carbonate, 1 to 6 parts of micromolecular compatilizer and 0.2 to 2 parts of initiator. And the modified polylactic acid improves the biodegradation rate. The heat-resistant biodegradable film-making material disclosed by the invention has excellent temperature resistance, degradability, mechanical strength and toughness, can be widely applied to various industries, and has good application and market prospects. The invention also discloses a production process of the heat-resistant biodegradable film-making material.

The present invention relates to mutated DNA polymerases derived from wild-type Thermus aquaticus (Taq) DNA polymerase, methods for reverse transcription polymerase chain reaction (RT-PCR) using said DNA polymerases, and kits comprising said DNA polymerases.

The invention relates to the technical field of extruders, in particular to a dynamic thermal stability extrusion processing device and method.The dynamic thermal stability extrusion processing device comprises charging barrel units, and at least three charging barrel units are sequentially connected in the axial direction to form a charging barrel structure of an extruder; a heating unit is arranged on the outer wall of each charging barrel unit; a cooling channel is arranged on the inner wall of the charging barrel unit, and the cooling channel is distributed between the heating unit and the inner wall of the charging barrel unit; and a conveying pipeline and a liquid return pipeline of the cooling pipeline are respectively connected with the liquid inlet and the liquid outlet of each cooling channel through valves so as to form a plurality of cooling loops with controllable flow velocity. A heat exchange system composed of a constant-power heating unit and a built-in cooling loop is integrated in each charging barrel unit connected in series in the axial direction, the flow speed of a cooling medium is adjusted through temperature feedback, heating and cooling are decoupled, the heating temperature of each charging barrel unit is independently adjusted in the mode that the flow speed of the cooling medium is changed, and the heating efficiency is improved. And dynamic regulation and control on the extrusion temperature of the molten material are realized.

The embodiment of the invention discloses heat-resistant stable recombinant humanized V-type collagen and a preparation method thereof, relates to the technical field of recombinant protein, and aims to solve the technical problem that existing collagen is difficult to meet application requirements. The preparation method of the heat-resistant and stable recombinant humanized V-type collagen comprises the following steps: respectively obtaining recombinant collagen with gene sequences as shown in SEQ ID No.2, SEQ ID No.4 and SEQ ID No.6, and respectively inserting the recombinant collagen into pPIC9K plasmids to obtain corresponding recombinant plasmids; the recombinant plasmids comprise a recombinant plasmid pPIC9K-ColV alpha 1-1, a recombinant plasmid pPIC9K-ColV alpha 1-2 and a recombinant plasmid pPIC9K-ColV alpha 1-4, and the recombinant plasmid pPIC9K-ColV alpha 1-1, the recombinant plasmid pPIC9K-ColV alpha 1-2 and the The recombinant plasmid is sequentially subjected to electrotransformation treatment, screening treatment, identification treatment and purification treatment, and the recombinant V-type collagen alpha1 is obtained; the recombinant V type collagen alpha1 comprises a recombinant V type collagen alpha1-1, a recombinant V type collagen alpha1-2 and a recombinant V type collagen alpha1-4.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a full-bio-based high-performance polyhydroxyalkanoate (PHA) lamination master batch, a preparation method of the full-bio-based high-performance PHA lamination master batch and application of the full-bio-based high-performance PHA lamination master batch in preparation of lamination paper products. The full-bio-based high-performance polyhydroxyalkanoate (PHA) lamination master batch is characterized by comprising the following raw material components in parts by weight: 70-100 parts of a mixture of crystalline or semi-crystalline PHA and high-fluidity PHA; 0.1-1 part of a heat stabilizer; 0.1 to 2 parts of a nucleating agent; 0.1 to 1 part of a chain extender; 0.1 to 1 part of a melt reinforcing agent; 0.05 to 0.5 part of an antioxidant; and 0.05 to 0.5 part of a lubricant. According to the present invention, the crystal type / semi-crystal type PHA and the high fluidity PHA are combined according to the specific ratio, and a variety of functional auxiliary agents are supplemented so as to form the synergistic effect; the crystalline PHA provides strength and rigidity, and the high-fluidity PHA is used as a plasticizer and a flexibilizer, so that the processing window is effectively widened, and the melt strength and toughness are improved.

The utility model provides a feeding device for PVC (polyvinyl chloride) heat stabilizer production, which relates to the technical field of PVC heat stabilizer production and comprises a mixing barrel, the top and the bottom of the mixing barrel are closed, a tray is fixed at the top of the mixing barrel, a support tray is rotatably arranged at the bottom of the mixing barrel, and the support tray is fixed on the mixing barrel. According to the material mixing device, materials needing to be mixed and configured are placed in the material mixing barrel to be stirred and mixed, after the materials are stirred and mixed, the supporting disc is driven to rotate through rotation of the rotating shaft, and when the supporting disc rotates and passes through the discharging hole, the supporting disc is driven to rotate, so that the materials are uniformly mixed. According to the intermittent material taking device, materials stirred in the material mixing barrel are stored through the storage pipe and then conveyed to the bending part, and the materials in the storage pipe are discharged under the action of the bending part, so that the intermittent material taking function can be achieved, meanwhile, the situation that the materials need to be reconfigured after one-time operation and each-time feeding are finished is avoided, and the overall production efficiency is higher.

This invention belongs to the technical field of PVC wall panel materials, specifically an antibacterial and mildew-resistant PVC wall panel material and its preparation method, comprising the following components: polyvinyl chloride resin, an antibacterial and mildew-resistant slow-release complex, a calcium-magnesium composite heat stabilizer, an environmentally friendly plasticizer, an acrylate processing aid, a composite lubricant, and fillers. This invention utilizes a composite coating system constructed with a rhamnose lipase-modified nano-zinc oxide amphiphilic coating layer as the inner layer and a phytic acid-modified β-cyclodextrin and trisodium citrate synergistic adsorption layer as the outer layer. This system encapsulates nano-zinc oxide within the PVC matrix, delaying the risk of zinc ion leaching from landfills and inhibiting the activity of key extracellular enzymes in the soil. Simultaneously, the heat stabilizer, plasticizer, and processing components help maintain the matrix's density, indirectly enhancing physical barrier properties and achieving low ecological impact throughout the wall panel's life cycle.

This invention discloses a composite film for packaging with good barrier properties, high kink strength, and low resilience, as well as its preparation method, belonging to the technical field of composite film preparation. The raw materials of this invention include: 45-55 parts PET, 25-40 parts PP, 0.5-1 part heat stabilizer, 2-5 parts antioxidant, 2-3 parts ultraviolet absorber; 1-2 parts hindered amine light stabilizer, 2-3 parts lubricant, 4-6 parts coupling agent, 5-10 parts filler, 1-2 parts flame retardant, 5-8 parts crosslinking agent, and 2-8 parts compatibilizer. By adding the compatibilizer PP-g-MAH, the compatibility of the PET / PP blend system can be improved, thereby enhancing its rheological and mechanical properties.

A system includes a first acousto-optic deflector (AOD) for diffracting an incident beam of laser energy to produce and output therefrom a first beam of laser energy and a second beam of laser light, a second AOD arranged to receive the first beam of laser energy and for diffracting the received first beam of laser energy to thereby produce and output therefrom a third beam of laser energy and a fourth beam of laser energy, at least one first beam trap arranged and configured to absorb the second beam of laser energy output from the first AOD, at least one second beam trap arranged and configured to absorb the fourth beam of laser energy output from the second AOD and a controller communicatively coupled to the first AOD and to the second AOD, wherein the controller is configured to operate of the first AOD while not operating the second AOD.

A continuous waste heat utilization system for tunnel kilns, relating to the field of kiln waste heat utilization technology, includes a first exhaust fan, a first blower, a second blower, a kiln body, a heat stabilization box, and two heat storage chambers. The outer walls of the kiln body near the feed end and discharge end are respectively provided with a first vent and a second vent, and the outlet end of the second blower is connected to the second vent. The heat stabilization box is connected to a differential heat inlet pipe and a heat stabilization outlet pipe. The heat storage chambers are connected to a flue gas inlet pipe, a flue gas outlet pipe, an air inlet pipe, an air outlet pipe, and an exhaust pipe. The inlet end of the first exhaust fan is connected to the first vent of the kiln body, and the outlet end of the first exhaust fan is connected to the two flue gas inlet pipes. The outlet end of the first blower is connected to the two air inlet pipes, and the two air outlet pipes are connected to the differential heat inlet pipe. The heat stabilization outlet pipe is connected to a gas heating device. This continuous waste heat utilization system can directly and continuously utilize the waste heat from the flue gas in the tunnel kiln, improving waste heat utilization efficiency.

The application relates to the field of packaging materials, in particular to a high-strength PET bottle blank and a preparation method thereof. The high-strength PET bottle blank comprises, in mass parts, at least: PET resin 90-130 parts, auxiliary polymer composition 5-12 parts, nano reinforcing phase 2-6 parts, crystallization regulator 0.5-1 part, thermal stabilizer 0.3-0.6 part and dispersant 0.2-0.5 part. The PET bottle blank material prepared by the application can not only significantly improve the mechanical strength and mechanical strength, but also can consider the long-term performance stability of the bottle blank material under complex environmental conditions, such as high-temperature storage, low-temperature impact, waterproof and moisture resistance or content corrosion and the like, so as to meet the comprehensive performance demand of the PET bottle blank under complex environment and ensure the application environment.

This application relates to the field of well workover fluid technology, specifically to a high-temperature resistant well workover fluid and its preparation method. The high-temperature resistant well workover fluid comprises the following raw materials: deionized water, modified anti-settling enhancer, temperature-resistant polymer thickener, heat stabilizer, viscosity stabilizer, bactericide, density regulator, and plugging agent. The preparation method of the high-temperature resistant well workover fluid is as follows: Density regulator and plugging agent are added sequentially to deionized water and stirred evenly; then the modified anti-settling enhancer and temperature-resistant polymer thickener are added and stirred evenly; next, the heat stabilizer and viscosity stabilizer are added, and the mixture is stirred at a constant temperature. After cooling to room temperature, the bactericide is added, stirred evenly, and allowed to stand for aging to obtain the high-temperature resistant well workover fluid. This high-temperature resistant well workover fluid exhibits outstanding high-temperature stability. After standing at 210℃ for 7 days, the density remains stable, and the parameters of plastic viscosity, dynamic shear force, and initial / final shear are reasonable, with no significant sedimentation, effectively improving the stability of the well workover fluid at high temperatures.

The invention relates to the technical field of oil extraction, and provides a high-temperature thermosensitive channeling blocking agent and a blocking method. The high-temperature thermosensitive channeling sealing agent is prepared from the following components in percentage by mass: 0.2 percent to 1 percent of a high-temperature thermosensitive main agent, 0.3 percent to 0.6 percent of a gelling agent, 0.02 percent to 0.06 percent of a viscosity keeping agent, 0.05 percent to 1 percent of a high-temperature expansion material, 0.1 percent to 0.3 percent of a toughening agent, 0.02 percent to 0.05 percent of a heat stabilizer, 0.01 percent to 0.03 percent of a synergist, 0.01 percent to 0.03 percent of a glue keeping agent and the balance of a diluent. The high-temperature thermosensitive channeling sealing agent can effectively seal a deep dominant steam channeling channel of a stratum, expands the steam wave and range, improves the development effect of a heavy oil thermal recovery reservoir, and solves the problem that the temperature resistance and channeling sealing distance of the channeling sealing agent for heavy oil thermal recovery are difficult to combine. Meanwhile, based on the distribution rule of a formation temperature field and a pressure field, a step-by-step deep channeling sealing process method is formed, and the sealing requirements of different zones are met.

The application provides a dye solution for detecting active oxygen, a kit and application thereof, and relates to the field of detection reagents. The dye solution for detecting active oxygen comprises a probe for detecting active oxygen and a heat stabilizer. The probe for detecting active oxygen comprises MitoSOX red mitochondrial superoxide fluorescence probe and / or 2,7-dichlorodihydrofluorescein diacetate. The heat stabilizer comprises one or a combination of several of alpha-cyclodextrin, sucrose, glucose, glycerol and beta-cyclodextrin. By adding the heat stabilizer to the dye solution, the heat stability of the probe is improved, and the problem of poor heat stability of the probe in the reagent for detecting active oxygen ROS is solved.

The invention discloses a reaction kettle for preparing a composite liquid calcium-zinc-tin heat stabilizer, and relates to the technical field of reaction kettles. The device comprises a bottom plate, a mounting structure is fixedly connected to the middle of the upper end face of the bottom plate, a heating structure is arranged in an inner cavity of the mounting structure, a storage structure is rotatably connected to the lower portion of the middle of the inner cavity of the mounting structure, and a stirring structure is placed in an inner cavity of the heating structure and located above the storage structure; lifting adjusting structures are rotationally connected to the positions, located on the left side and the right side of the mounting structure, of the upper end face of the bottom plate, clear water in the mounting frame is heated through the heating structure on the bottom plate in the using process, a water bath environment is formed, the storage structure is heated more evenly, and local overheating or material coking caused by direct contact heating is avoided; the device is especially suitable for mixed reaction of organic salt sensitive to temperature and an antioxidant, stable control over the heating rate is achieved through the control module and the connecting cable, slow and stable temperature rising is ensured, sufficient fusion of reactants is facilitated, and the product stability is improved.

The present invention relates to a method for producing a thermally stabilized lignin, the method comprises the steps of providing lignin and subjecting the 5 lignin to heat treatment in a fluidized bed reactor, wherein the fluidized bed reactor comprises a fluidizing media and the velocity of the fluidizing media is between 0,1-1,0 m / s and the final temperature during heat treatment is above 200°C. The invention also relates a stabilized lignin, a carbon enriched material and the use of the carbon enriched material. 10

A composition of liquid bis(alkyltin mercaptide) compounds containing 4-6 thio-ester groups of formula (I):wherea, b, c and d are equal to 1 or 2, and a+b=c+d=3,R′ is a linear, branched, or cyclic C1-C12 hydrocarbon group,SR″ and R″S are independently selected from an alkyl thioglycolate group, an alkyl thiopropionate or a 2-mercaptoethyl carboxylate group, where the alkyl is a linear, branched, or cyclic C6-C18 hydrocarbon group; andSR′″S is an alkylene glycol di-thioester group, where the alkyl groups are linear or branched C1-C6 hydrocarbon groups.

The invention discloses a sewage treatment plant concrete layered pouring intelligent temperature control system and method, and relates to the technical field of sewage treatment plant concrete pouring, the system comprises four core modules, and concrete pouring full-period intelligent temperature control and MFC unit optimization management are realized. The MFC unit layout planning module adopts a main-auxiliary combined scheme, a main unit is arranged in an S shape along a cooling pipeline, and an auxiliary unit strengthens stress concentration area coverage. The dynamic temperature regulation and control trigger module acquires data such as inner surface temperature difference and temperature change rate regularly, and compares the data with a standard interval to judge a high / low temperature regulation and control trigger state. The dynamic regulation and control scheme analysis module is used for adjusting the substrate concentration and the electrogenesis bacterium ratio according to a high-temperature scene; and a low-temperature scene optimizes the ratio of metabolic heat-stable bacteria. The later optimization module monitors the hydration reaction completeness rate through a high-frequency resistivity sensor, the main MFC unit is adjusted to a low-load mode, the auxiliary unit is shut down, and dual guarantee of energy efficiency and structural safety is achieved.

The invention provides a long-life organic tin heat stabilizer composition and a preparation process, and relates to the technical field of material processing, the formula of the composition comprises a core organic tin component, a bio-based synergistic stabilizer, a multi-scale enhanced dispersion system, a microencapsulation anti-loss agent, and a functional lubricant, a composite antioxidant system and an interface compatilizer as auxiliary materials; the mass percent of the core organic tin component is 35%, the mass percent of the bio-based synergistic stabilizer is 22%, the mass percent of the multi-scale enhanced dispersion system is 18%, and the mass percent of the microencapsulation anti-loss agent is 15%. Meanwhile, a composite antioxidant system is matched to delay the aging of the components; and in cooperation with the packaging protection effect of the microencapsulation anti-loss agent, the problem that the stability efficiency is reduced due to volatilization and migration of the organic tin component in the long-term processing or using process is effectively avoided.

The utility model discloses a plate heat exchanger structure which comprises a main body, a connecting device installed on the right side of the main body, a positioning rod installed on the left side of the connecting device, a heat exchange plate installed on the positioning rod, a clamping plate installed on the left side of the heat exchange plate, a connecting plate installed on the clamping plate, a rotating shaft installed on the connecting plate and a connecting bearing installed on the rotating shaft. A fixing lock is installed on the left side of the connecting bearing, and a rotating handle is installed on the left side of the fixing lock. According to the plate heat exchanger structure, in the aspect of heat exchange, the ventilation grooves of the heat exchange plates are evenly distributed, the contact area with air or fluid can be increased so as to improve the heat exchange efficiency, the design of ventilation openings and sealing strips can ensure the sealing performance and smooth heat exchange, and the design of rubber plates can improve the sealing performance and ensure stable heat exchange; in the aspects of connection and installation, the connecting flange is conveniently connected with the air conveying pipeline, the sealing rubber ring on the inner side of the pipeline enhances sealing performance, installation difficulty is reduced, connection reliability is improved, and the positioning rod ensures accurate displacement of the clamping plate so as to reduce installation errors.

The utility model relates to the technical field of liquid food inspection, and discloses a combined device for preparing a gel sample, which comprises a water bath kettle and a gel mold, and is characterized in that a water bath plate is arranged in the water bath kettle, a plurality of water bath through holes are formed in the water bath plate, a plurality of socket structures are arranged on the water bath plate, and a plurality of water bath through holes are formed in the socket structures; a gel mold is fixedly inserted in each socket structure, a transverse cutting mechanism is arranged on the lower portion of each gel mold, each gel mold further comprises a longitudinal cutting mechanism, and the device has the advantages of being stable in water bath heating and easy to separate after condensation.

The invention relates to the technical field of resource recycling, and particularly discloses a method for recycling a recycled base material of a PVC advertising product and an obtained product, the method for recycling the recycled base material of the PVC advertising product comprises the following steps: (1) removing impurities from the recycled advertising product to obtain pretreated PVC fragments; (2) putting the pretreated PVC fragments into a cleaning solvent, and washing to obtain purified PVC fragments; (3) uniformly mixing the purified PVC fragments with a heat stabilizer, and performing hot melting, extrusion and granulation to obtain PVC regenerated stable particles; and (4) uniformly mixing the PVC regenerated stable particles, high-molecular-weight PVC resin, a compatilizer, an oxidant and a lubricant, and carrying out hot melting, extrusion and granulation to obtain the recycled PVC advertisement product regenerated base material. The regenerated base material prepared by the method provided by the invention has excellent mechanical properties and thermal stability.