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31results about How to "Strong response speed" patented technology

Preparation method for fluorescent carbon quantum dot/SiO2/inorganic fluorescent powder ternary composite temperature sensing material

The invention discloses a preparation method for a fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite temperature sensing material, and belongs to the field of composite functional material. According to the preparation method, anhydrous citric acid and organosilane are used as raw materials for synthesis of silane functionalized fluorescent carbon quantum dots, a sol-gel method is adopted, a hydrolytic copolycondensation reaction is carried out with tetraethoxysilane, and thus the fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite material is obtained. In the temperature range of 100-440 K, the ratio of the fluorescent carbon quantum dots of the composite material to the fluorescence intensity of a fluorescent powder of the composite material has good linear relationship with the temperature, so that a way based on fluorescence thermal quenching is provided for temperature sensing detection. The fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite temperature sensing material has the obvious advantages of high stability, fast response, high sensitivity and the like, and has good application prospects.
Owner:SOUTH CHINA AGRI UNIV

Environment-friendly inner wall paint and preparation method thereof

The invention discloses environment-friendly inner wall paint, which is prepared from the following ingredients in parts by weight: 35 to 45 parts of fluorine-containing triazine type film forming polymers, 10 to 15 parts of phosphoric acid modified nanometer titanium dioxide, 20 to 30 parts of pigment filling materials, 2 to 5 parts of anti-foaming agents, 3 to 7 parts of coalescing agents and 20to 30 parts of water. The preparation method of the environment-friendly inner wall paint comprises the following steps that the fluorine-containing triazine type film forming polymers, the phosphoric acid modified nanometer titanium dioxide, the pigment filling materials, the anti-foaming agents, the dispersing agents and the coalescing agents are proportionally put into a high-speed mixing machine to be mixed for 20 to 30min, and are then charged into a ball milling tank; after the ball milling treatment is performed for 5 to 8h, mixed powder is obtained; then, water is added into the mixedpowder; at the rotating speed being 1200 to 1500 turns per minute, dispersion is performed for 10 to 15 minutes; next, curing is performed for 2 to 5 days; sampling for inspection is performed; afterthe products are qualified, sieving and packaging are performed. The environment-friendly inner wall paint disclosed by the invention has the advantages that the price is cheap; the formaldehyde absorption and decomposition effects are obvious; the efficiency is high; the secondary pollution cannot be caused; the visible light response speed is high; the fireproof performance and the bonding capability are high; the weathering performance is good.
Owner:南通涂冠环保科技有限公司

Metal phthalocyanine loaded fluorescent carbon quantum dot as well as preparation method and application thereof

ActiveCN112552306AEmission spectrum wavelength longEmission peak half maximum width narrowMaterial nanotechnologyOrganic chemistry methodsCatecholamineSpecific detection
The invention discloses a metal phthalocyanine loaded fluorescent carbon quantum dot as well as a preparation method and application thereof, and the preparation method comprises the following steps:firstly, preparing fluorescent carbon quantum dots (CQDs) and metal phthalocyanine (MPc) with a catalytic function by adopting a nano-synthesis technology, and then realizing effective loading of theCQDs and the MPc by adopting an organic-inorganic nano-composite technology to prepare the loaded carbon quantum dot. According to the invention, metal phthalocyanine with a catalytic function and a fluorescence signal sensing group carbon quantum dot are integrated, when the loaded carbon quantum dot catalyzes catecholamine oxidation, an electron transfer channel between CQDs and MPc is destroyed, and fluorescence of the carbon quantum dot is turned on, so that catecholamine catalysis and detection are carried out at the same time. The method has the advantages of being convenient to use andoperate, high in anti-interference capacity, sensitive and reliable in result, low in detection limit, high in response speed and good in stability, real-time online rapid and specific detection can be achieved, and good application prospects and potential application value are achieved.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING

Distributed hydraulic-pneumatic braking system of heavy transport vehicle and control method

The invention discloses a distributed hydraulic-pneumatic brake system of a heavy transport vehicle and a control method, the system comprises a brake control system, a hydraulic brake system and a pneumatic brake system, the hydraulic brake system is arranged on a tractor, and the pneumatic brake system is arranged on a trailer; the control method comprises the steps that the vehicle executes a conventional braking mode, a rapid braking mode and an emergency braking mode according to the change speed of braking pedal force at the beginning of braking, the advance of the pneumatic braking system is flexibly designed according to the braking modes, and pressure adjustment is achieved in an electric control mode; and a drum brake with a good braking effect is used in the hydraulic braking system. The air pressure braking system uses a disc brake with better heat dissipation performance, the whole vehicle uses two braking systems, and the characteristics of high sensitivity of a hydraulicbraking system and high braking force of a pneumatic braking system are brought into play; and compared with a traditional braking system, the distributed hydraulic-pneumatic brake system is advantageous in that the response speed of the system is higher, and the braking efficiency, braking stability, safety and comfort of the heavy transport vehicle are improved.
Owner:CHINA UNIV OF MINING & TECH

Device and method for detecting microsphere defects by combining dark field imaging with space phase-shifting interference

InactiveCN112903713ASolve the lack of depth informationIncrease contrastOptically investigating flaws/contaminationGrismBeam splitter
The invention discloses a device and method for detecting microsphere defects by combining dark field imaging with space phase-shifting interference, and relates to the technical field of optical detection. The problem of low detection efficiency is solved. Linearly polarized light sequentially penetrates through a lambda / 2 wave plate, a 4f beam expanding system and a high-power microscope objective and then enters a pinhole of a pinhole reflector, and a part of light diffracted by the pinhole reflector is reflected by a D-shaped reflector to a second collimating lens to form reference light. The rest part of the light sequentially penetrates through the first collimating lens, the lambda / 4 wave plate, the beam splitter prism and the microscope objective to enter the measured microsphere, the reflected light of the light sequentially penetrates through the microscope objective, the beam splitter prism, the imaging lens and the mask plate to enter the imaging CCD to form a two-dimensional information image of the measured microsphere, and the transmitted light of the beam splitter prism returns to the second collimating lens along the original path to be collimated to form measuring light; the reference light and the measuring light are superposed and modulated by the wave plate group, and the polarization analyzer enables the reference light and the measuring light to generate interference and then to enter the large-area-array high-speed camera to form a three-dimensional information image of the measured microsphere.
Owner:HARBIN INST OF TECH

A kind of environment-friendly interior wall coating and preparation method thereof

The invention discloses environment-friendly inner wall paint, which is prepared from the following ingredients in parts by weight: 35 to 45 parts of fluorine-containing triazine type film forming polymers, 10 to 15 parts of phosphoric acid modified nanometer titanium dioxide, 20 to 30 parts of pigment filling materials, 2 to 5 parts of anti-foaming agents, 3 to 7 parts of coalescing agents and 20to 30 parts of water. The preparation method of the environment-friendly inner wall paint comprises the following steps that the fluorine-containing triazine type film forming polymers, the phosphoric acid modified nanometer titanium dioxide, the pigment filling materials, the anti-foaming agents, the dispersing agents and the coalescing agents are proportionally put into a high-speed mixing machine to be mixed for 20 to 30min, and are then charged into a ball milling tank; after the ball milling treatment is performed for 5 to 8h, mixed powder is obtained; then, water is added into the mixedpowder; at the rotating speed being 1200 to 1500 turns per minute, dispersion is performed for 10 to 15 minutes; next, curing is performed for 2 to 5 days; sampling for inspection is performed; afterthe products are qualified, sieving and packaging are performed. The environment-friendly inner wall paint disclosed by the invention has the advantages that the price is cheap; the formaldehyde absorption and decomposition effects are obvious; the efficiency is high; the secondary pollution cannot be caused; the visible light response speed is high; the fireproof performance and the bonding capability are high; the weathering performance is good.
Owner:南通涂冠环保科技有限公司

Programmable overvoltage protection device having VDMOS and thyristor

The invention relates to a programmable overvoltage protection device with a VDMOS and a thyristor, and belongs to the technical field of power semiconductors. According to the programmable overvoltage protection device, two VDMOSs are used for providing independent control over two NPNP thyristors respectively, and the gate ends of the VDMOSs are connected with negative power supply voltage; or,the two VDMOSs are respectively used for providing independent control over the two PNPN thyristors; the gate end of the VDMOS is connected with positive power supply voltage; when the negative voltage on the telephone line is lower than a threshold voltage of the power supply voltage or the positive voltage is higher than the threshold voltage of the power supply voltage, the device is started and conducts overvoltage generated by surge on the transmission line to the ground, so that a subscriber line interface circuit (SLIC) is protected from surge overvoltage caused by lightning stroke andother factors, one-way programmable protection is realized, and the characteristics of a VDMOS longitudinal structure and a unipolar device are utilized, so that the power consumption is low, the temperature characteristic is good, the programmable input voltage range is wider, and the surge voltage bearing capacity is higher.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

A preparation method of a ratio oxygen sensing film for detecting dissolved oxygen content

ActiveCN110108683BGood ratiometric oxygen sensing performanceHigh linear correlationFluorescence/phosphorescencePhysical chemistryToluene
The invention discloses a preparation method of a ratio oxygen sensing film for detecting dissolved oxygen content, and relates to a preparation method of a ratio oxygen sensing film. It is to solve the problems that the existing ratiometric oxygen sensing method pollutes the water sample to be tested, is not recyclable, causes high cost, and has poor photobleaching resistance. Method: 1. Evenly disperse the azobisisobutyronitrile solution in the St / TFEMA mixed solution, and then carry out the copolymerization reaction on the mixed solution under the protection of nitrogen to obtain a copolymer solution; wash and filter with suction; 2. Mix PtOEP / toluene Mix the solution with the C6 / toluene solution to obtain a mixed indicator solution; redissolve the copolymer solution in toluene to obtain a copolymer / toluene solution; mix the copolymer / toluene solution with the mixed indicator solution, smear on a quartz plate, and dry A ratiometric oxygen sensing membrane was obtained. The ratio oxygen sensing membrane of the present invention can be recycled for many times, has no pollution to the environment, and has the ability of resisting photobleaching. The invention is used in the field of dissolved oxygen detection.
Owner:HARBIN INST OF TECH

Fluorescent carbon quantum dots/sio 2 / Preparation method of inorganic phosphor ternary composite temperature sensing material

The invention discloses a preparation method for a fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite temperature sensing material, and belongs to the field of composite functional material. According to the preparation method, anhydrous citric acid and organosilane are used as raw materials for synthesis of silane functionalized fluorescent carbon quantum dots, a sol-gel method is adopted, a hydrolytic copolycondensation reaction is carried out with tetraethoxysilane, and thus the fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite material is obtained. In the temperature range of 100-440 K, the ratio of the fluorescent carbon quantum dots of the composite material to the fluorescence intensity of a fluorescent powder of the composite material has good linear relationship with the temperature, so that a way based on fluorescence thermal quenching is provided for temperature sensing detection. The fluorescent carbon quantum dot / SiO2 / inorganic fluorescent powder ternary composite temperature sensing material has the obvious advantages of high stability, fast response, high sensitivity and the like, and has good application prospects.
Owner:SOUTH CHINA AGRI UNIV
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