6results about How to "High apparent viscosity" patented technology

This invention relates to a fat mimic based on micro / nano-sized starch, its preparation method, and its application. The preparation method of the fat mimic includes: S1: providing a potato starch solution with a concentration of 15-20%; S2: adding 35-50 u / g of α-amylase (with an enzyme activity of 10000 u / g) based on the mass of potato starch, and enzymatically hydrolyzing at 85-90℃ for 5-15 min to obtain a potato starch enzymatically hydrolyzed fat mimic with a DE value of 2-3; S3: adjusting the potato starch enzymatically hydrolyzed fat mimic to a concentration of 1-5%, and using dynamic ultra-high pressure microfluidic technology at a pressure of 180-200 MPa for 6-12 cycles of micro-nano-sized potato starch fat mimic to obtain a particle size between 500-700 nm. Compared with enzymatically hydrolyzed fat mimics, the micro-nano-scale potato starch fat mimics prepared in this invention have significantly improved oil retention, emulsification, emulsification stability, sedimentation, and apparent viscosity. This is beneficial for increasing their fat substitution rate in food and developing low-fat or fat-free foods with a more delicate texture and better sensory experience and textural expectations for consumers.

The invention belongs to the technical field of oil exploitation, and particularly relates to a dry powder thickening agent for fracturing as well as a preparation method and application thereof. The thickening agent comprises the following components: (a) 1-vinyl-2-pyrrolidone; (b) a di [2-(methacryloyloxy) ethyl] phosphate ester; (c) 2-(perfluorohexyl) ethyl methacrylate; (d) 4, 4 '-diaminostilbene-2, 2'-disulfonic acid; (e) an initiator; based on 1 mole part of 1-vinyl-2-pyrrolidone, the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part respectively, and the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are respectively 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part. The thickening agent has the advantages of high apparent viscosity, high shear resistance, temperature resistance and high resistance reduction rate, and the resistance reduction rate reaches 70% or above.

The invention discloses a preparation method of an environment-friendly salt-resistant and high-temperature-resistant filtrate reducer for a long open hole section. The preparation method specifically comprises the following steps: step 1, preparing a first mixed solution; step 2, preparing dispersion liquid; step 3, mixing the first mixed solution and the dispersion solution, and then shearing for 1-2 hours to obtain a shearing solution; step 4, adding the shear fluid into a reaction kettle, introducing nitrogen into the reaction kettle, discharging air in the reaction kettle, keeping the temperature at 70 DEG C, stirring for 10 minutes while keeping the temperature, adding an initiator, and stirring for 10-12 hours to obtain a reaction liquid; step 5, adding the reaction liquid into isopropanol according to a volume ratio of 1: 1.5, stirring for 40 minutes, standing for 2 hours, and filtering to obtain a reaction material; and step 6, washing the reaction material with absolute ethyl alcohol and methanol for 10 minutes respectively, and then drying to obtain the environment-friendly salt-resistant and high-temperature-resistant filtrate reducer for the long open hole section. The problem that an existing filtrate loss agent is poor in filtrate loss reduction performance in a long open hole section is solved.

This invention discloses an adaptive balancing lifting device for aircraft door assembly and disassembly, belonging to the field of lifting device technology. It includes a lifting frame, lifting components, and a clamping assembly. The clamping assembly is equipped with a flexible component containing magnetofluid and a corresponding excitation component, which can adapt to the curved surface of the door and actively harden to provide reliable clamping. The lifting device also integrates a multi-degree-of-freedom angle adjustment component and a vision-feedback-based active balancing system. Before handling, the clamping angle can be adjusted to align the door using the longitudinal and lateral adjustment components. During handling, a vision camera detects the door's attitude in real time, and the control system drives independent lifting components on both sides for dynamic leveling. Micro-vibrations are absorbed by adjusting the magnetofluid state, achieving adaptive flexible gripping, precise attitude adjustment, and stable anti-sway handling of irregular doors, significantly improving the safety, accuracy, and efficiency of assembly and disassembly operations.

The application discloses a peanut skin extract / chitosan blended solution with antibacterial function and high mechanical property and application in fibers and films, and belongs to the technical field of functional textile materials. The peanut skin extract is prepared by using a solvent extraction method, and then the amino groups on the chitosan and the phenolic hydroxyl groups on the peanut skin extract are combined together through ionic crosslinking, so as to prepare the peanut skin extract / chitosan blended solution. Finally, the peanut skin extract / chitosan blended solution is spun into fibers or cast into films, so as to improve the mechanical property, hydrophobic property, antibacterial property and the like of the fibers and the films.

This invention relates to the field of interventional medical devices and precision fluid control technology, specifically to an auxiliary device for catheter and guidewire processing in an interventional catheterization lab. It comprises a mechanical actuator, a data acquisition module, a pneumatic adjustment module, and a controller. The system, through the cooperation of a fluid drive unit and a flexible variable boundary unit, utilizes a spiral flow channel to transform the fluid into a spiral jet with axial thrust. Its core principle is to use a fluid medium as the sole power medium, replacing traditional solid-mechanical contact. This invention completely eliminates the physical damage to the guidewire's micron-level hydrophilic coating caused by roller clamping, effectively ensuring the integrity and lubrication performance of the interventional device.