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274results about How to "Increase exchange rate" patented technology

Electrostatic spinning method and device of fiber-based waterproof moisture-permeable film high in moisture-permeable flux

The invention relates to an electrostatic spinning method and device of a fiber-based waterproof moisture-permeable film high in moisture-permeable flux. The electrostatic spinning method includes that during electrostatic spinning, polymer solution jet flow is injected at a certain included angle with air of a certain temperature and/or lateral air flow of non-solvent steam, and polymer molecules in the jet flow are quickened to be separated and solidified into fibers; water-pressure resistance of the electrostatic spinning film, namely the fiber-based waterproof moisture-permeable film high in moisture-permeable flux is greater than or equal to 100kPa, and the moisture-permeable flux is greater than or equal to 15000g/m<2>/d. The electrostatic spinning device is composed of an electrostatic spinning box, a high-voltage direct-current power supply, an electrostatic spinning hydraulic system, a spinning jet and a receiving base material, and a steam generation and air supply system is mounted on one side of the electrostatic spinning box. The fiber-based waterproof moisture-permeable film produced by the method has the advantages of small bore diameter, controllable adhesion degree and high porosity; the film is high in water-pressure resistance and moisture-permeable flux when used in the waterproof and moisture-permeable areas, and is wide in actual application prospect.
Owner:DONGHUA UNIV

Compound improved conditioner for saline-alkali soil and preparation method of compound improved conditioner

The invention relates to a compound improved conditioner for saline-alkali soil and a preparation method of the compound improved conditioner. The compound improved conditioner comprises the following raw material components: 30-50 parts of an organic conditioner, 40-70 parts of an inorganic conditioner, 10-30 parts of biological conditioner and 5-15 parts of an artificially synthesized conditioner. The preparation method comprises the steps of drying the raw material components until the moisture contents are 4%-8%, grinding the raw material components to be 200-350 meshes, uniformly mixing, adding the mixture into a granulator, and granulating to obtain a finished product. According to the compound improved conditioner, the physical and chemical properties of soil can be improved, the permeability and the moisture and fertility preservation performance of soil can be improved, the ion exchange ratio and the buffer pH value of soil can be increased, the number and the activities of microorganisms in soil can be increased, the soil fertility can be increased, the output and the quality of crops can be increased, the soil improvement effect can be improved, and the soil improvement period can be shortened.
Owner:SHANDONG SUNWAY LANDSCAPE TECH

Preparation method of gold/nitrogen-doped hollow carbon nanosphere core-shell material

The invention relates to a preparation method of a gold/nitrogen-doped hollow carbon nanosphere core-shell material, belonging to the field of biomedical materials. The preparation method comprises the steps of firstly, preparing gold sol by using a sol-gel method; secondly, coating the surfaces of gold particles with SiO2 by using an improved stober method, and then forming Au@SiO2@PDA spheres in a weak alkaline water-containing environment by means of auto polymerization of dopamine; finally, carrying out high-temperature calcination, and obtaining the gold/nitrogen-doped hollow carbon nanosphere core-shell material after NaOH is etched. The method is simple, mild and environment-friendly, and does not add additional toxicity; the prepared gold/nitrogen-doped hollow carbon nanosphere core-shell material has the particle size of about 165-175nm; as a near-infrared photothermal therapeutic agent for treating tumors, a product not only has good biocompatibility and light and heat stability, but also has the characteristic of having an internal hollow structure; after the gold/nitrogen-doped hollow carbon nanosphere core-shell material is used, the speed of particle exchange is accelerated, and the photothermal conversion efficiency is improved.
Owner:YANGZHOU UNIV

Gold leaf acer negundo twig cutting seedling method

The invention discloses a gold leaf acer negundo twig cutting seedling method which comprises the steps of cutting bed preparation, cutting stem selection, cutting shoot making, cutting shoot hormone rooting induction, cutting, post-cutting management and the like. Perlite is adopted as a substrate of a cutting bed, and a magnetic field network, an electric field network and an automatic atomizing system are arranged; cutting stems are selected within May, June and July; cutting stems with the diameter ranging from 4 mm to 6 mm are selected as cutting shoots and soaked in a growth regulating agent for 1 min to 2 h; a straight cutting method is adopted for cutting the cutting shoots into the seedbed, the automatic atomizing system carries out automatic atomization after cutting is finished when the air humidity is smaller than 90%; in the period from cutting to callus forming, the shading rate is kept 75%, the relative humidity is kept from 90% to 91%, and the temperature is kept from 30 DEG C to 40 DEG C; in the middle and later periods of cutting, the air humidity is controlled to range from 70% to 80%, the temperature is controlled to range from 30 DEG C to 40 DEG C, and the cutting shoots are processed by 100000 V voltage for 2 h every day. According to the gold leaf acer negundo twig cutting seedling method, the cutting environment most suitable for growth of gold leaf acer negundo twigs is obtained through screening by adjusting and controlling cutting shoot obtaining time, the cutting environment, the cutting shoot selection, the cutting substrate selection, the selection of hormone promoting rooting and other aspects, and the method is stable and efficient for gold leaf acer negundo twig cutting propagation.
Owner:中徽生态环境有限公司

Method and device for water feeding and water draining of rectangular cultivating pond of young panax

The invention relates to a method and a device for water feeding and water draining of a rectangular cultivating pond of young panax. A water feeding pipe and a water draining pipe are arranged in a rectangular pond body along the diagonal direction respectively, the water feeding pipe is arranged at one corner of the rectangular pond body, and the water draining pipe is arranged at the position diagonal to the corner where the water feeding pipe is arranged, so that the path of the water flow is extended, and the residence time of the water feeding in the pond is prolonged correspondingly; aplurality of rows of swirl nozzles are arranged on the wall of the water feeding pipe along the vertical direction, each row includes three swirl nozzles facing towards three directions inside the pond, and the row of the swirl nozzles in the middle face towards the diagonal direction of the pond; the water draining pipe is of inner and outer casing pipe structure in which the water level can be adjusted, the height of the water draining port on the inner pipe can be controlled through moving the inner pipe of the water draining pipe up and down to adjust the water level in the pond. The method disclosed by the invention can effectively reduce the volume of a stagnant water area in the pond, improve the water qualiy and the survival rate as well as the growth rate of the young panax, thereby realizing the effects of separation of sewage rows, reduction of pressure of purification treatment of discharge water and secondary utilization of upper layer water draining in the pond.
Owner:DONGYING HAIYUE FISHERY TECH CO LTD

Method for preparing calcium ion selective molecular sieve and application of molecular sieve in descaling

The invention provides a method for preparing a calcium ion selective molecular sieve and an application of the molecular sieve in descaling. The molecular sieve is prepared by a two-step continuous hydrothermal crystallization method, which comprises the steps of firstly reacting a silicon source and an aluminum source under the action of sodium hydroxide solution to form an aluminosilicate sol, carrying out hydrothermal crystallization for 0.5-1 hour under a sealed condition at 60-90 DEG C, then adding fatty alkyl amines as a structure-directing agent, adjusting the pH value of the solution to 8-13, then carrying out hydrothermal crystallization at 130-150 DEG C for 24-72 hours, filtering, washing and roasting at high temperature to obtain the molecular sieve. The molecular sieve prepared by the method contains cubic crystal particles as well as a plurality of flaky and needle-like crystals and has a higher calcium ion adsorption capacity and adsorption rate which is 2.86 times of the adsorption rate of the traditional 4A molecular sieve. The molecular sieves prepared by the method provided by the invention is used for the field of the descaling of geothermal water, can effectively prevent heat transfer equipment from scaling and can be used as an effective measures to geothermal water pretreatment descaling in a geothermal water descaling system.
Owner:TIANJIN UNIV
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