8results about How to "Reduce apparent viscosity" patented technology

This invention relates to the field of biosensing technology, providing a self-driven sorting device with a near-field direct-write gradient grid and its fabrication method. The invention aims to solve the problems of existing microfluidic sorting devices, such as reliance on external power, susceptibility to stacking and clogging, and severe human background interference. The device constructs a spatially heterogeneous geometric topological grid in situ on a porous substrate using a near-field direct-write process, forming a three-level gradient path consisting of a primary coarse filtration zone, a secondary sorting zone, and a tertiary retention zone. This invention utilizes substrate capillary forces to drive sample flow and achieves physical guidance and precise retention of human cells through a deterministic lateral displacement mechanism. While significantly increasing sample processing throughput, it drastically reduces the proportion of human reads in sequencing, providing a convenient and efficient technical platform for automated preprocessing of complex biological samples and high-sensitivity clinical detection.

This invention belongs to the field of food processing technology, specifically relating to a processing technology for low-fat meat products based on gelation technology. The process includes: dispersing polysaccharide gel components and microcrystalline cellulose in water, heating to swell, and then cooling to form a composite gel system; introducing air bubbles through mechanical stirring and controlling temperature to solidify and form a porous gel; improving pore wall stability through low-temperature regulation and gel aging treatment; obtaining micron-sized porous gel particles through low-shear granulation; vacuum impregnating a high-viscosity hydrophilic polysaccharide solution with shear-thinning properties under reduced pressure; mixing the obtained porous gel particles with minced meat, shaping, and heating to obtain the low-fat meat product. This invention, by constructing a porous gel structure to store lubricating factors, achieves gradual release during chewing. Without adding any exogenous oils, the coefficient of friction is reduced by more than 20%, effectively solving the technical problems of dry texture and poor lubricity in low-fat meat products, and has good industrial application prospects.

This invention discloses a coal gangue grouting and filling material with high rheological resistance and resistant to bleeding, its preparation method, and its application, relating to the field of mine filling material technology. The grouting and filling material, by mass percentage, comprises: 70%~75% coal gangue, 0.55%~2.3% composite rheology modifier, and the balance being water; wherein the composite rheology modifier includes an air-entraining agent and a dispersant, with a mass ratio of (90~99):(1~10); the air-entraining agent is a surface-active foaming material, and the dispersant is a phosphate additive. In its preparation, coal gangue is first mixed with water and stirred to obtain an initial slurry; then the air-entraining agent and dispersant are mixed to prepare the composite rheology modifier; finally, the composite rheology modifier is added to the initial slurry and stirred until homogeneous to obtain the grouting and filling material. This grouting and filling material uses coal gangue as the main raw material, has a simple preparation process, and possesses excellent fluidity, stability, and pumpability.

The invention discloses an efficient heat dissipation device based on non-Newtonian fluid and metal fins and a preparation method thereof.The efficient heat dissipation device comprises a sealing cover, a base and the porous metal fins, the sealing cover is internally provided with a containing cavity matched with the porous metal fins, the porous metal fins are arranged on the base, and the containing cavity is communicated with the base. The sealing cover covers the base, so that the sealing cover and the base form a sealed cavity structure, a working medium inlet and a working medium outlet are respectively formed in the sealing cover and are connected with an external liquid cooling circulation system, and a cooling working medium is a non-Newtonian fluid; according to the scheme, the non-Newtonian fluid is coupled with the porous fin structure, and the local viscosity of a working medium is actively regulated and controlled by utilizing a high shear field in the porous medium, so that the synergistic strengthening effect of low pump work and high heat exchange is realized.

The application relates to the technical field of biomedical engineering, and discloses a method for constructing an ex vivo normal-temperature perfusion repair model based on a discarded liver. The method constructs a double-path closed-loop perfusion system, applies a shear stress flow field with low-frequency fluctuation characteristics to a portal vein loop to maintain endothelial function, loads a composite flow field obtained by superimposing low-frequency pulsation and high-frequency micro-shaking on a hepatic artery loop, and significantly reduces microcirculation flow resistance by using the thixotropy and shear thinning characteristics of oxygen-containing perfusion liquid. The system further realizes physical layering of red blood cells and lipids by using acoustic radiation force of a standing wave acoustic flow control layered cavity, and automatically guides a high-viscosity fat-rich flow layer into an adsorption module for specific purification by cooperating with a thixotropic passive shunt valve based on fluid viscosity feedback. Temperature-gas coupling adjustment based on a metabolic temperature coefficient is performed in a rewarming stage. The application solves the problems of microcirculation non-recurrent flow and hyperlipidemia clearance by coupling of multi-dimensional physical fields, and realizes effective repair of the discarded liver.

The invention provides a kitchen and bath composite board and a preparation process thereof, and relates to the technical field of building decoration materials, the kitchen and bath composite board comprises a core layer and two surface layers, the core layer is of an extruded polystyrene foam structure, the two surface layers are compounded on the two opposite sides of the core layer, and the surface layers are of stone-plastic composite structures; wherein each stone-plastic composite structure is an integrated plate layer formed by co-extruding a first component and a second component. The composite board is formed by compounding a hydrophobic extruded polystyrene foam structure and a stone-plastic composite structure, and the whole structure does not contain hydrophilic wood fibers, so that the problems of expansion, deformation and cracking caused by moisture absorption are fundamentally avoided, the dimensional stability and the physical performance can be kept for a long time in high-humidity environments of kitchens and bathrooms, and mold breeding is effectively inhibited.

This invention discloses a highly dispersible carbon nanotube conductive slurry and its preparation method. The conductive slurry is composed of a first polar aprotic solvent, multi-walled carbon nanotubes, a conjugated electron acceptor type intercalation inducing agent, and a cold-state low-viscosity polymeric adhesive. The cold-state adhesive contains fluorinated polymers such as polyvinylidene fluoride (PVDF). During preparation, the solvent, carbon nanotubes, and inducing agent are first heated and held at a constant temperature to achieve charge transfer complexation and pre-loosening; then, the pressure is reduced to allow the solvent to undergo micro-boiling flash evaporation to expand the inter-tube gaps; next, under pressure holding conditions, the cold-state adhesive is injected using a pressure difference, and the local negative pressure generated by condensation and contraction introduces the polymer into the carbon nanotubes to complete electrostatic anchoring; finally, the pressure is restored to normal and homogenized for degassing. This invention achieves non-destructive deep dispersion of carbon nanotubes through the synergistic effect of chemical pre-loosening and hydrodynamic pumping, significantly reducing the apparent viscosity of the slurry and effectively preventing carbon nanotube framework breakage and secondary agglomeration.

The invention discloses a slurry system suitable for complex rock stratum drilling and a preparation method and application thereof, the slurry system is composed of bentonite slurry and rock slag, and 23-41 g of rock slag is added into every 100 mL of bentonite slurry; the bentonite slurry is prepared from the following raw materials in parts by weight: 1 to 8 parts of bentonite, 0.03 to 0.32 part of sodium carbonate, 0.1 to 1 part of filtrate reducer, 0.1 to 0.5 part of coating inhibitor, 0.10 to 0.15 part of viscosity reducer and 100 parts of water. The raw material components are uniformly mixed and stirred, and an alkali solution is added to adjust the pH value to be neutral or alkalescent, so that the slurry system suitable for complex rock stratum drilling can be prepared. The slurry system can be used for preparing drilling fluid for complex rock stratum drilling in the Ordos region and the like. The problems that in the existing complex rock stratum drilling process, the rock slag amount is large, the inferior solid phase invasion concentration in mud is high, and the rheological property, the filter loss and the mud cake quality are difficult to control can be solved.