38results about How to "Strong rigid structure" patented technology

The invention discloses a temperature control and magnetic screen device for a rubidium atomic frequency standard. An outer magnetic screen bottom plate is mounted on the upper surface of the temperature control bottom plate, and a magnetic screen covers the temperature control bottom plate and is fixed on the side surface of the temperature control bottom plate; a heating film is fixed below theouter temperature control bottom plate through silica gel; a thermistor is embedded into a hole of the external temperature control bottom plate; leads of the heating film and the thermistor are connected with the temperature control circuit; the heat conduction gasket is mounted between the outer temperature control bottom plate and the complete machine bottom plate through screws; and the temperature control circuit can be mounted on the temperature control bottom plate. According to the design of the device, on the premise that effective heat dissipation of the core assembly can be ensured,the stable environment temperature and the excellent magnetic shielding effect are provided for a physical system and a sensitive circuit assembly of the rubidium atomic frequency standard, so that the temperature sensitivity and the magnetic sensitivity of the rubidium atomic frequency standard are further overcome, all the assemblies are firmly installed, the anti-seismic requirement is met, and finally the long-term stability level of the rubidium atomic frequency standard can be remarkably improved.

The invention discloses an easy-to-move steel structure temporary house. The house comprises a base plate, an outer box is fixedly connected to the upper surface of the base plate, a door plate is hinged to the side surface of the outer box through hinges, and first reinforcing ribs and second reinforcing ribs are fixedly connected to the lower surface of the base plate; fixing blocks are fixedlyconnected to the side surface of the base plate, a first bearing is clamped with the upper surface of each fixing block, a first rotating shaft is inserted into each first bearing, a wheel is fixedlyconnected to one end of each first rotating shaft, and a mounting plate is fixedly connected to the lower surface of the base plate. According to the house, through the arrangement of the base plate,the fixing blocks, the first bearings, the first rotating shafts and the wheels, an integrated house is formed with the base plate as a basis; the base plate is supported by the wheels and suspended,the wheels can roll to drive the base plate to move in a small range and achieve short-distance transportation, and therefore the trouble of disassembly and recombination when the position of the house needs to be changed is avoided.

The invention discloses polyimide for an FOLED substrate and a preparation method of the polyimide. The method comprises the following steps: reacting an intermediate containing two halogen atom substituted xanthone with ammonia water to convert halogen atoms into amino groups; and then grafting a nitro-containing group through a Ullmann coupling reaction, then reducing to obtain the diamine monomer containing the xanthone structure, and then polymerizing the prepared diamine monomer with dianhydride to obtain the polyimide containing the xanthone structure. The planar rigid structure and thepolar groups of xanthone are creatively introduced into a polyimide main chain, the planar rigid structure is beneficial to regular stacking of molecular chains and induction of polymer crystallization, and the polar groups can enhance the hydrogen-bond interaction of the molecular chains and promote close stacking of the molecular chains so that polyimide has excellent barrier property, high glass-transition temperature and thermal stability and low thermal expansion coefficient.

The invention provides a compound and application thereof, and an organic electroluminescent device comprising the same, the compound has a structure of formula (I), and the compound is used as a material of a luminescent layer in the organic electroluminescent device; and the organic electroluminescent device comprises a first electrode, a second electrode and an organic layer between the first electrode and the second electrode, and the organic layer contains one or a combination of at least two of the compounds. According to the compound provided by the invention, the LUMO orbital energy level of the compound can be improved, direct injection of electrons is reduced, reverse intersystem crossing is facilitated, the luminous efficiency is improved, part or all hydrogen atoms in the compound are subjected to heavy hydrogenation, the molecular structure stability can be greatly improved, and the vibration coupling strength of molecules is reduced; therefore, the energy loss of molecular non-radiative transition is reduced, and the service life of the device is prolonged; and when the compound is applied to an organic electroluminescent device as a luminescent material, the efficiency roll-off of the device can be further reduced, and the service life of the device is prolonged.

The invention relates to a ship adopting sea surface micro structure measuring device, which comprises an underwater optical device consisting of a light source and a measuring coder, and an information transmission and treating system consisting of a CCD camera and a computer. The invention is characterized in that the ship adopting sea surface micro structure measuring device further comprises a lifting device which is connected with the underwater optical device; the guide rail of the lifting device is welded and tightly leaned on a guide rail rack; a motor arranged at the upper part of the guide rail rack pulls lifting chains arranged at the two ends of the guide rail rack; the guide rail rack is connected with a base through two parallel blocking rings; the base is vertically fixed on the ship board. The measuring coder comprises glass windows arranged at the two ends of the drawtube; a Fresnel lens is close to the lower part of the glass window at the upper end; a color coding sheet is tightly leaned on the glass window at the lower end; the Fresnel lens, the color coding sheet and the Fresnel lens are on a same optical shaft. The invention is suitable for the ship voyage and operation, thereby monitoring the big size sea surface gradient field in real time with a space resolution of 0.5mm and a slope measuring precision reaching up to 0 degree or 2 degrees.

The invention discloses rosinyl anion macroporous adsorption resin and a preparation method thereof, and the rosinyl anion macroporous adsorption resin is prepared by taking dimethylaminoethyl methacrylate as a monomer and hydrogenated rosin (beta-acryloyloxyethyl) ester as a cross-linking agent through a suspension polymerization method. The rosinyl anion macroporous adsorption resin is a spherical porous material, the average pore size is 3-10 nm, the specific surface area is 5-10 m < 2 > / g, the resin is non-toxic, green and environment-friendly and uniform in particle, and a functional group is of a tertiary amine anion structure. The rosin-based anion macroporous adsorption resin has the unique advantage of separating substances with negative charges, so that the rosin-based anion macroporous adsorption resin can be used for separating hexose pigments, Maillard pigments or other pigments with negative charges in food.

The invention discloses a double-bond-containing cholesterol zwitterionic compound, a preparation method thereof and an ionic liquid based multiphase emulsion prepared from the double-bond-containing cholesterol zwitterionic compound. The structural formula of the compound is shown in the specification, wherein R in the formula represents C1-C4 alkyl groups, m is an integer in the range of 6-12, and n is 3 or 4. The double-bond-containing cholesterol zwitterionic compound has obvious amphipathicity, the ionic liquid based multiphase emulsion can be prepared from the double-bond-containing cholesterol zwitterionic compound only serving as a stabilizer and an ionic liquid serving as one phase with a one-step method, the preparation method is simple, and the obtained multiphase emulsion has good stability and is applicable to various oil-phase systems.

The invention discloses antibacterial diamine prepared from a medical intermediate and a preparation method thereof. According to the preparation method, a grafting reaction is conducted on halogenated phenothiazine to enable halogenated phenothiazine to have an amino group, so a diamine monomer containing a phenothiazine structure is prepared; the diamine containing the phenothiazine structure iseasy to form a D-pi-D or A-pi-A system and has high planarity and relatively high rigidity; and the planar rigid structure is beneficial for regular stacking of molecular chains, induction of polymercrystallization and promotion of tight stacking of the molecular chains, and can improve the barrier property of a polymer prepared from the diamine. Meanwhile, the diamine disclosed by the inventiontakes the phenothiazine structure as a core and has good antibacterial and bacteriostatic effects, and the polymer prepared from the diamine also has a certain antibacterial property.

The invention discloses a double-bond-containing cholesterol zwitterionic compound, a preparation method thereof and an ionic liquid based multiphase emulsion prepared from the double-bond-containing cholesterol zwitterionic compound. The structural formula of the compound is shown in the specification, wherein R in the formula represents C1-C4 alkyl groups, m is an integer in the range of 6-12, and n is 3 or 4. The double-bond-containing cholesterol zwitterionic compound has obvious amphipathicity, the ionic liquid based multiphase emulsion can be prepared from the double-bond-containing cholesterol zwitterionic compound only serving as a stabilizer and an ionic liquid serving as one phase with a one-step method, the preparation method is simple, and the obtained multiphase emulsion has good stability and is applicable to various oil-phase systems.

The invention discloses a method for preparing a diethylstilbestrol molecularly imprinted electrochemical sensor based on electropolymerization of a p-aminothiophenol film. The method comprises sequential steps such as glassy carbon electrode pretreatment, electrode modification by multi-wall carbon nanotubes, electrode modification by nano gold, functional monomer self-assembly, template molecular pre-assembly, electropolymerization of the p-aminothiophenol film, and template molecule elution, and an organic phase as a polyelectrolyte solvent improves the number and selectivity of binding sites in a polymer film, and is beneficial to formation of a stable host-guest compound from a template molecule and a function monomer, so that the template molecule can maintain a good rigid structurein a polymer network structure and form a cavity with a memory effect. The preparation method is simple and easy to control, and the sensor has strong selectivity and stability, high sensitivity and low cost. The sensor is suitable for analysis and detection of diethylstilbestrol residues in animal-derived foods, feeds and other samples.

The invention discloses diamine with a novel structure and a preparation method and application thereof. According to the invention, starting from dihalogenated phenoxazine, a diamine monomer is prepared through a Suzuki reaction and a reduction reaction. The lowest-energy-state molecular structure of the novel diamine monomer has high planarity and a certain antibacterial property; and the molecular chains of a polymer taking the diamine monomer as a monomer are tightly piled up, and the polymer is small in free volume and has high barrier property and antibacterial property. The diamine disclosed by the invention can be used for synthesizing high-performance and functionalized polymers such as polyamide, polyimide, polyamideimide, polyesterimide and the like.

The invention discloses a high-barrier polyimide containing a 9,10-dihydroacridine structure, and a preparation method and an application thereof. The preparation method comprises the following steps:converting halogen atoms of dihalogenated 9,10-dihydroacridine into cyano groups, hydrolyzing to obtain a dicarboxylic acid monomer, performing acylating chlorination, grafting with a nitro-containing groups through an amidation reaction, performing reduction to obtain a diamine monomer, and polymerizing the prepared diamine monomer with dianhydride to obtain the polyimide containing the 9,10-dihydroacridine structure. The diamine containing the 9,10-dihydroacridine structure has a planar rigid structure and also contains many structures capable of generating hydrogen bonds, and polyimide prepared by taking the diamine as a monomer has the advantages of tight molecular chain stacking, small free volume and high barrier property.

The invention discloses thioxanthone polyimide with high planar rigidity and a preparation method of the thioxanthone polyimide. According to the preparation method, halogen atoms of dihalogenated thioxanthone are converted into cyano groups, then hydrolysis and acylating chlorination are carried out and then groups containing nitro groups are grafted through an amide reaction; then diamine monomers containing thioxanthone structures are obtained through reduction, and the thioxanthone polyimide with high planar rigidity is obtained through polymerization of the diamine monomers and dianhydride. According to the invention, a large-volume planar rigid thioxanthone structure is introduced into a polyimide main chain, so that a polyimide molecular chain can be piled up more tightly, the freevolume of a polymer is reduced, and the barrier property of polyimide is effectively improved. Meanwhile, the conjugated structure of the thioxanthone structure can improve the heat resistance and oxidation resistance stability of the polymer and improve the stability of the polymer in an extreme environment.

The invention provides a photodynamic sterilization polymer as well as a preparation method and application thereof. The polymer is composed of a main chain and a side chain; the side chain is composed of a long alkyl chain with a quaternized tail end and can be combined with the surface of bacteria with negative charge to form a tight combined body, so that a bacterial membrane is transparent; the main chain is composed of benzene, fluorene and thiophene and has a relatively strong rigid structure; under a light illumination condition, the main chain is excited by light to sensitize air in the periphery to generate active oxygen, so that an efficient sterilization effect is realized. The polymer can be used as an antibacterial agent and can be used for killing gram positive bacteria and gram negative bacteria; the polymer also can be used for killing fungi and has a broad-spectrum antibacterial function. The polymer is simple to prepare and moderate to react and has relatively high yield. The polymer is used as an efficient photodynamic antibacterial material, concentration needed by sterilization is low and the light dosage is small; common white illumination can reach an efficient sterilization effect. The polymer provided by the invention emits fluorescent light in a long-wave region and also can be used for biological fluorescent imaging.

The invention provides an organic compound, an organic light-emitting display panel and application thereof. The organic compound provided by the invention has a structure as shown in a formula I; in the organic compound provided by the invention, the separation of a charge donor and a charge acceptor of a molecule realizes a smaller Est, so that the molecule has a TADF property; the organic compound provided by the invention is a blue thermal activation delayed luminescent material and has a relatively strong rigid structure, molecules are not easy to twist and rotate, intersystem crossing and anti-intersystem crossing can be quickly generated in the molecules, and the transient fluorescence lifetime is shortened, so that the organic compound shows relatively high efficiency; the organic compound provided by the invention is used as a main body material of a light-emitting layer, so that the device has higher efficiency and longer service life.