45results about How to "Short modification time" patented technology

The invention discloses a homogeneous method for preparing a wood fiber derivative under room temperature. The method comprises the following steps: drying ground wood fiber powder, suspending the dried wood fiber powder in a solvent, and stirring till the wood fiber is dissolved completely to obtain wood fiber solution; dissolving an acylation reagent in the same solvent, and stirring under the room temperature till the acylation reagent is dissolved completely to obtain acylation reagent solution; adding the acylation reagent solution into the wood fiber solution, and carrying out esterification reaction under the room temperature and a moisture isolated condition; and depositing the solution obtained after the esterification reaction, collecting, washing, freezing and drying deposits, and preparing to obtain the required wood fiber derivative. The invention has the advantages that homogeneous derivatization of wood fiber is realized under the room temperature; and not only can the homogeneity and the stability of the product be improved effectively, but also equipment requirements and energy requirements can be reduced. Therefore, the invention has a significant scientific value and practical significance on the development and the utilization of renewable resources such as wood fiber, biological substances and the like.

The invention discloses a method for preparing a high-efficiency heavy metal adsorbent by modifying cotton stalk biomass charcoal. Carbonization at 300°C for 3‑6h; (2) Add 0.3mol/L KMnO to the cotton biochar prepared in step (1) ₄ solution, and then add a mass fraction of 60% HNO ₃ solution, heated at 85-95°C for 2.5-3.5h, filtered, washed, and dried to obtain a modified product, the biochar and KMnO ₄ solution and HNO ₃ The dosage ratio of the solution is 1g: (7-7.8)ml: (3.3-4.0)ml. The pore volume of the biomass charcoal obtained by carbonizing the cotton stalks prepared by the method of the invention is obviously increased, and can efficiently adsorb heavy metal copper and cadmium at the same time.

The invention applies to the technical field of electronic tags and discloses a shelf electronic tag system based on IOT (internet of things) RF (radio frequency) as well as an information modification method. The shelf electronic tag system based on IOT RF comprises a server, a WIFI module, a shelf electronic tag control module, an RF module and at least one shelf electronic tag for recording anddisplaying commodity information; during using, corresponding shelf electronic tag commodity information is modified by the server, the electronic tag control module receives the modified informationand a control instruction, performs analysis to determine a modified information delivery object and sends the modified information to a corresponding electronic tag for receiving, and the modified information is displayed by the corresponding shelf electronic tag. The price modification time of the electronic tag is short, so that timeliness is high, and management efficiency of shelf sales is improved; meanwhile, use cost and human cost are reduced.

The invention provides a modification method for alcohol method modifying soybean concentrated protein, which comprises the steps of soybean waste degreasing, ethanol extracting, soybean protein concentrating, protein slurry making, modifying, homogeneous processing and spray drying.

The invention relates to a modified asphalt waterproof coil material and a preparation method thereof, and belongs to the technical field of chemical engineering. The modified asphalt waterproof coilmaterial is prepared from 90# asphalt, 10# asphalt, butadiene styrene rubber, activating glue powder, polyethylene membranes, polyester blanks, engine oil and filling materials. The 90# asphalt, 10# asphalt, YP03 activating glue powder, engine oil and other filling materials are added into the elastomer modified asphalt waterproof coil material; through the modification on the elastomer modified asphalt waterproof coil material by YP03 active rubber powder, the ingredient stirring process is studied; the process control parameters are changed; the proceeding of the ingredient stirring processin production at the lower temperature is realized; the high-temperature-resistant performance and the low-temperature softness performance are improved.

The invention provides a preparation method of a wood fiber oil-absorption material. An esterification reaction is carried out on wood fiber and an esterification reagent under the conditions of a pyridine catalysis effect and ball-milling, so that the wood fiber oil-absorption material is obtained, an organic solvent does not need to be used in the reaction process, the product separation and purification treatment is simple, and the preparation technology is convenient in operation, short in modification time, high in reaction degree and better in oil absorption effect; the absorption rate for diesel oil is 9.86 g/g, and the absorption rate for soybean oil is 10.21 g/g.

The invention relates to a medical hydrophilic fiber dressing. Specifically, the invention discloses a cellulose fiber carboxymethylation treatment liquid which can effectively improve the performanceof the obtained sodium carboxymethyl cellulose fiber by adding a specific assistant to the treatment liquid, thereby facilitating preparation of dressing with excellent strength and liquid absorption.

The invention discloses a water-based graphene dispersion liquid and a preparation method thereof, and belongs to the technical field of graphene modification. The water-based graphene dispersion liquid is a durable stable dispersion liquid prepared by taking single-layer and/or double-layer and/or multi-layer nano graphene as a raw material to carry out a reaction with a chelating-type titanate under the action of ultrasonic waves and mechanical stirring. The water-based graphene dispersion liquid prepared by the preparation method is good in dispersion liquid stability, and no sedimentationphenomenon occurs when the dispersion liquid is placed for 30 days; the dispersion liquid is low in viscosity and good in liquidity, the dispersion medium is water, and no polymer is added or generated, so that the application field is wide; the preparation process of the dispersion liquid is simple, the reaction is mild, the modification time is short, and industrial application is easier; the dispersion liquid is an environment-friendly product, no harmful impurities are introduced in the preparation process, and a used coupling agent can be wound or bonded with a composite material to forma whole substance in subsequent processing.

The invention provides a simple preparation method of a hydrophilic PVDF (Polyvinylidene Fluoride) membrane. The preparation method comprises the following steps: adding a polyamino compound into a PVDF membrane casting solution to activate PVDF in a membrane solution preparation process, carrying out phase separation to form a membrane, and soaking the membrane in a subsequent grafted compound aqueous solution to obtain the modified PVDF membrane. The PVDF membrane prepared by the method has excellent hydrophilicity. A BSA (Bovine Serum Albumin) pollution resistance test shows that the modified PVDF membrane has good pollution resistance. The method provided by the invention has the advantages of few steps, cheap and easily available materials, short modification time and industrial application potential.

The invention discloses a production method and an application of a super-hydrophobic surface polypropylene nonwoven fabric. The method comprises the following steps: arranging a polypropylene nonwoven fabric in a boiling water/n-heptane solution system, immersing, taking out, and drying to obtain the super-hydrophobic surface polypropylene nonwoven fabric. The method has the advantages of simple operation, low cost, environmental protection, and industrial production requirement meeting; and the super-hydrophobic surface polypropylene nonwoven fabric produced in the invention has the advantages of good hydrophobicity and good permeability maintenance, and can be applied to the fields of separation of water and water-insoluble organic solvents, and water mist removal of flue gas.

A method is provided for operating a device that is usable for printing the respective lateral surface of hollow objects. The device comprises at least one mandrel wheel for holding the hollow objects on projecting expanding mandrels, and a transfer wheel for transporting the hollow objects, which transfer wheel is arranged downstream of the mandrel wheel in a transport direction of the hollow objects. The mandrel wheel and the transfer wheel are each rotatably arranged in a laterally offset manner, with respect to one another, in two different planes that are parallel to one another. Hollow objects, which are printed during ongoing printing production, are transferred from the work arbors of the mandrel wheel to the transfer wheel. During a modification of the device, from a first production of hollow objects having a first height, to a second production of hollow objects having a second height, a lateral offset between the mandrel wheel and the transfer wheel is adapted to the height of the hollow objects to be printed in the second production by automatically changing the axial position of the transfer wheel relative to the position of the mandrel wheel.

The invention relates to a modifying method of quick lime for sintering. The modifying method comprises the following steps of (1) crushing quick lime which is not treated; (2) adding water to the quick lime which is crushed in the step (1), performing sufficient stirring, and then performing standing for 30-40min; (3) adding sodium hydroxide solid to a solution prepared in the step (2), and performing uniform stirring; (4) heating the solution prepared in the step (3) to 60-70 DEG C, and continuing performing stirring; (5) mixing sodium sulfide with water in the mass ratio of the sodium sulfide to the water being 1 to 100 so as to obtain a sodium sulfide aqueous solution; (6) uniformly adding the sodium sulfide aqueous solution which is prepared in the step (5) to the solution prepared inthe step (4); (7) charging carbon dioxide to the solution prepared in the step (6), after the solution become turbid, continuing charging the carbon dioxide until a clarifying layer appears at the upper layer of the solution; and (8) filtering the solution prepared in the step (7). According to steel products prepared from the modified quick lime, the mechanical property is obviously improved, the life is prolonged, and the steel products are excellent in quality and high in stability.

The invention relates to the field of surface modification of natural fibers and discloses a method for rapidly depositing dopamine or a derivative thereof on the surfaces of natural fibers in a non-aqueous medium environment. The method comprises the following steps: (1) soaking and preprocessing a natural fiber fabric in an alkali solution for later use; (2) adding dopamine or the derivative of dopamine into a non-aqueous medium, and adequately stirring so as to uniformly scatter dopamine or the derivative of dopamine in the medium; and (3) soaking the natural fiber fabric processed in the step (1) into the non-aqueous medium of the step (2), stirring, taking out the fabric, and flushing and drying the fabric. By utilizing the non-aqueous medium environment, a brand-new method for the modifying surfaces of the natural fibers by virtue of dopamine or the derivative of dopamine is provided. By utilizing the method, the uniform deposition of dopamine or the derivative of dopamine on the natural fibers can be realized in a short time, and the utilization rate of dopamine or the derivative of dopamine is high.