36results about How to "No thermal decomposition" patented technology

Belonging to the technical field of lightning protection, the invention relates to an insulating and thermal conductive ablation resistant adhesive and application thereof in lightning protection. The adhesive is mainly prepared from the following raw materials: 20-100% and not up to 100% of a mixture of high temperature resistant resin and a curing agent, and 0-80% and greater than 0% of an insulating and thermal conductive ablation resistant inorganic filler. After curing, the electrical conductivity of the adhesive is in the range of 10<-8>-10<-20>S/m, the DC breakdown voltage in the air is in the range of 30-300kV/mm, the thermal conductivity is in the range of 0.2-3.0W/(m.K), and the ablation resistant temperature is up to 300DEG C. A certain thickness (30-250micrometer) of the insulating and thermal conductive ablation resistant adhesive is employed to stick a conductive film to the surface of a continuous carbon fiber laminated composite material part, thus preventing conduction of current to the continuous carbon fiber laminated composite material part and improving the lightning protection effect of the conductive film.

The invention discloses a construction waste recycling and reusing process, which comprises the following steps of: 1, collecting waste concrete, waste mortar and waste brick slag; 2, smashing and screening, namely smashing and screening the collected waste concrete, the collected waste mortar and the collected waste brick slag to obtain regenerative rough aggregates and regenerative fine aggregates; and 3, preparing foam concrete, namely firstly preparing cement slurry, namely uniformly stirring concrete, water, the regenerative rough aggregates and the regenerative fine aggregates to obtain the cement slurry, and secondly adding a foam dilution solution, namely adding the foam dilution solution formed by uniformly mixing a foaming agent and water into the cement slurry, and uniformly stirring to obtain the foam concrete. The steps of the process are simple; the investment cost is low; the process is simple, feasible and high in operability; the waste concrete, the waste mortar and the waste brick slag can be effectively reused; the economical benefit is outstanding; the produced foam concrete material is high in heat preservation performance; and the problems that the construction waste is abandoned and stacked randomly and occupies the land, the waste of resources is severe, and the environment pollution is severe are solved.

The invention relates to an anti-static modified material with carbon nanotubes (CNTs) predominantly and a process which is a thermal oxidation treatment with acid together with a ball grinding surface treatment to CNTs and comprises: adding maleic anhydride grafted polyethylene, coupling agents and EPT rubber to prepare the high concentration masterbatch of CNTs/PE anti-static composite material by solution blending and melt blending methods, mixturing the said masterbatch with common PE in a finite proportion to melt blend and prill, then getting the final CNTs/PE anti-static composite material. The electrical surface resistivity and volume resistivity can reach the operating requirements of the anti-static material when the content of CNTs is only 0.3 wt % in the CNTs/PE anti-static composite material in the invention.

The invention relates to a high-weather-resistance acrylate resin composition and a preparation method thereof. The raw materials of the high-weather-resistance acrylate resin composition comprise the following components in part by weight: 10 to 30 parts of acrylate rubber powder 1, 10 to 30 parts of acrylate rubber powder 2, 30 to 60 parts of SAN resin 1, 5 to 20 parts of heat-resistant modifier, 5 to 15 parts of weather-resistant master batch, 0.3 to 3 parts of lubricant and 0.05 to 0.5 part of antioxidant. The preparation method comprises the following steps of: stirring the raw materials except the weather-resistant master batch to obtain a mixture; adding the mixture from a main feed inlet of a double-screw extruder, and adding the weather-resistant master batch from a side feed inlet; and extruding and pelleting the raw materials by the double-screw extruder to obtain a sample. The high-weather-resistance acrylate resin composition prepared by the method has higher heat resistance, low-temperature impact resistance, weather resistance, excellent size stability and processing property, and is particularly suitable for automobile exterior trim parts, such as radiator grilles, rear-view mirrors, license plates, central pillar plates, outdoor triangular blocks and the like, with high requirements on weather resistance, heat resistance and low-temperature impact resistance.

The invention discloses a lithium-lanthanum-zirconium oxide-based solid electrolyte material with stable surface, and a preparation method and an application thereof. The solid electrolyte material comprises an inner core and a coating layer which coats the surface of the inner core; the inner core is a lithium-lanthanum-zirconium oxide-based solid electrolyte (LLZO); and a material of the coatinglayer is an oxide. The inner core part, namely, the LLZO is coated with the oxide coating layer; and the LLZO can maintain a stable three-dimensional phase structure with high ionic conductivity, sothat phase change or thermal decomposition does not occur. The material of the oxide coating layer can change the chemical composition and surface acid-base property of the surface of the LLZO, and can block the erosion of air and water to the LLZO, so that the chemical stability of the LLZO in the air and the water is greatly improved, the application range, the processing environment and the using condition of the LLZO are expanded, and the energy density and the cycling stability of a lithium-lanthanum-zirconium oxide-based battery are improved.

The invention relates to a crude polypropylene fiber for concrete and a preparation method thereof. The crude polypropylene fiber comprises polypropylene, a thermotropic liquid crystal polymer being 0.1-25 percent by weight of the polypropylene, a compatilizer being 0.1-5.0 percent by weight of the polypropylene, an antioxidant being 0.1-0.5 percent by weight of the polypropylene and an ultraviolet absorption agent being 0.1-0.3 percent by weight of the polypropylene. The preparation method comprises the following steps: drying the polypropylene, the thermotropic liquid crystal polymer and other components to constant weight and then uniformly mixing the components; extruding the dried components by a spinneret plate of a double-screw extruder and then cooling an obtained extruded material in a water bath; stretching the cooled material in different stages for multiple times at a temperature being higher than the vitrification temperature of the polypropylene; spraying a conventional oil agent used for polypropylene spinning on an obtained fiber bundle and carrying out thermal shaping; and then carrying out indentation processing on the surface of the fiber. The thermotropic liquid crystal polymer strengthens the crude polypropylene fiber in the form of a microfiber so as to greatly improve the mechanical property of the crude polypropylene fiber, thereby enhancing or improving the crude polypropylene fiber to enhance the performances of anti-cracking, permeability resistance, breaking resistance, toughness, impact resistance, freezing and thawing resistance, fire resistance, bursting resistance, and the like of the concrete.

The invention discloses a post-curing 3D printing method. The post-curing 3D printing method includes treating the original sand with anhydrous ethanol and phenolic resin to form coated sand, and then spraying the dissolving agent at the time of printing, dissolving the phenolic resin on the coated sand and sticking, molding the coated sand, heating the molded workpiece and curing the molded workpiece for the second time. The post-curing 3D printing method of the present invention can enhance printing stability and workpiece strength, and can reduce the workpiece processing cost and store the printing material for a long time.

A liquid crystal aligning agent containing at least one polymer selected from the group consisting of polyamic acids, polyimides, and polyamic acid esters, said polymer having a group represented by general formula (1) or (2). In general formula (1), R1 and R2 are each independently hydrogen or a monovalent organic group, or R1 and R2 may be bonded to each other to form a ring; R3 is fluoro or cyano; a is an integer of 0 to 4; and * is a free valency, while in general formula (2), R4 is C1-40 alkyl or a C3-40 monovalent organic group containing an alicyclic group, with the proviso that the hydrogen atoms of the alkyl may be partially or completely replaced by fluorine atoms; R5 is fluoro or cyano; b is an integer of 0 to 4; and * is a free valency.

The invention discloses a method for extracting radix saussureae lappae essential oil by supercritical carbon dioxide, comprising the following steps of: firstly, freezing and drying radix saussureae lappae until the weight percentage of water is less than 10%; slicing and crushing to obtain radix saussureae lappae powder; and extracting the radix saussureae lappae powder for 30-240 minutes under the conditions that the temperature is 40-55 DEG C, the extraction pressure is 10-30 MPa and the CO2 flow is 5-25 L/h to obtain the radix saussureae lappae essential oil. By adopting the method for extracting the radix saussureae lappae essential oil, the extraction efficiency is high, the heat decomposition of essential oil components is not caused and the yield is higher than 6.04%. Compared with the traditional method, the method has the advantages that the production efficiency is greatly improved, the production period is shortened, the product yield is high and the economic benefit is obvious; and no environmental pollution is caused and the method is convenient for manual control and industrial production.

The invention provides a dental ceramic material and a preparation method and an application thereof, and belongs to the field of dental ceramic materials. The preparation method includes the following steps: mixing zirconia ceramic powder and an inorganic phosphate solution to obtain ceramic slurry; carrying out 3D printing or injection molding on the ceramic slurry to obtain ceramic body; and dehydrating and sintering the ceramic body in order to obtain the dental ceramic material. The dental ceramic material of the invention adopts the inorganic phosphate as a binder, does not undergo thermal decomposition under the condition of ensuring good bonding performance, changes from an amorphous phase to a crystalline phase when reaching phase transition temperature, which means the inorganicphosphate is converted into a corresponding crystalline phase during the sintering process, so as to further increase the solid content and compactness of bioceramic. In addition, in the invention, the zirconia ceramic powder has good biocompatibility and has lower size shrinkage compared with ceramic prepared by conventional organic binder ceramic slurry.

Provided is an aluminum precursor for thin-film deposition having a structure of formula (I) or (II), wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 each independently represent a hydrogen atom, C.sub.1.about.C.sub.6 alkyl, halo-C.sub.1.about.C.sub.6 alkyl, C.sub.2.about.C.sub.5 alkenyl, halo-C.sub.2.about.C.sub.5 alkenyl, C.sub.3.about.C.sub.10 cycloalkyl, halo-C.sub.3.about.C.sub.10 cycloalkyl, C.sub.6.about.C.sub.10 aryl, halo-C.sub.6.about.C.sub.10 aryl or --Si(R.sub.0).sub.3, and wherein R.sub.0 is C.sub.1.about.C.sub.6 alkyl or halo-C.sub.1.about.C.sub.6 alkyl. According to the present invention, based on the interaction principle between molecules, aluminum precursors for thin-film deposition are provided, which have a good thermal stability, are not susceptible to decomposition and convenient for storage and transportation, have good volatility at a high temperature, and are excellent in film formation. ##STR00001##