51results about How to "Reduce viscoelasticity" patented technology

The invention belongs to the technical field of flexible pendulous accelerometers, and particularly relates to a permanent magnet torquer based on a silicon-based coil for an inertial navigation accelerometer. The permanent magnet torquer for the accelerometer provided by the invention comprises a yoke, a permanent magnet, a magnetic conducting sheet and the silicon-based coil, wherein the yoke islocated at the most bottom, the permanent magnet is fixed on the yoke, and the magnetic conducting sheet is fixed on an upper surface of the permanent magnet. A permanent magnet air gap is formed between the yoke and the magnetic conducting sheet, the silicon-based coil is located in the permanent magnet air gap, and when the permanent magnet torquer is at work, the silicon-based coil is fixed onan accelerometer pendulum sheet through a coil cushion block. According to the permanent magnet torquer provided by the invention, an enameled wire wound coil of the permanent magnet torquer of the accelerometer is replaced by the silicon-based coil, thereby effectively reducing the thermal stress between the accelerometer pendulum sheet and the coil of the permanent magnet torquer, and meanwhilereducing the viscoelasticity of the coil. The silicon-based coil has better spatial stability in a permanent magnet magnetic circuit and can significantly improve the scale factor stability of the accelerometer.

A viscoelasticity measuring apparatus that measures viscoelasticity of a measurement target with high precision is provided. The measuring apparatus includes: a casing; a surface contact part provided in the casing and brought into surface contact with skin; a ball indenter that moves toward the skin more than the surface contact part and is pushed into the skin; a driving unit that supports the ball indenter and moves the ball indenter toward the skin; a load cell whose right end side is fixed to the casing and left end side supports the driving unit, the load cell detecting a pushing load that pushes the ball indenter into the skin; and a control unit that obtains displacement of the ball indenter.

A method and formulation are disclosed for using a mixture of inulin and surfactant to overcome adhesive and viscoelastic problems associated with using tortilla sheeters for processing rice-based dough to make rice crisps. The inulin decreases viscoelasticity whereas the surfactant decreases adhesiveness. The additive decouples the relationship between water content and the adhesiveness and viscoelasticity of the dough, allowing water content to be used to control other product variables such as product moisture content and oil take-up.

The invention discloses a method for preparing an epoxide resin foaming material. The method comprises the following steps that: 1. according to the mass ratio, epoxide resins, foaming agents, foam stabilizing agents and addition agents are respectively picked up and evenly mixed with high-speed stirring; 2. the mixture obtained is put in an oven with a temperature of between 40 and 80 DEG C and pre-heated for 0.5 to 1 hour, and the mixture is taken out and cooled down to a temperature of between 25 and 35 DEG C; 3. The mixture is added with curing agents and evenly mixed; 4. the mixture is put in a stainless steel mold and heated at the temperature of between 40 to 80 DEG C for 0.5 to 2 hours, and the mixture is cooled down to the room temperature and taken out, and finally the finished products are obtained. By controlling reaction conditions, the invention realizes the association control of the chemical foaming and the curing molding of epoxy, and the foaming multiplying factor isas high as 2.7, and products prepared by the method are good in water resistance, chemical corrosion resistance and strength. The method of the invention has the advantages of easy buying of materials, simple operation and easy industrialization, and provides a new path for preparing thermosetting foaming materials.

The invention belongs to the field of batteries, and particularly relates to a multiphase composite high-nickel ternary positive electrode material and a preparation method thereof. The material is formed by bonding a 3D cross-linked interpenetrating netty high-nickel ternary positive electrode material matrix and a single-ion conductor polymer, and has a 3D cross-linked interpenetrating netty core-shell structure. The required preparation method comprises the following steps: 1) carrying out gradient temperature reaction on a solution A, a solution B and a solution C in a reaction kettle, andthen carrying out high-temperature treatment to obtain the 3D cross-linked interpenetrating netty high-nickel ternary positive electrode material matrix; and 2) carrying out in-situ growth on lithiumaminobenzenesulfonate, an alcohol polymer, isocyanate and the 3D cross-linked interpenetrating netty high-nickel ternary positive electrode material matrix in the reaction kettle, and carrying out annealing treatment to obtain the multi-phase composite high-nickel ternary positive electrode material. The multi-phase composite high-nickel ternary positive electrode material prepared by the preparation method is good in cycling performance, easy for size mixing of a lithium ion battery, excellent in rate performance and low-temperature performance, and stable in structure; and the process is simple and easy to operate, and is environment-friendly.

The invention provides a self-adaptive fiber used in Z-pinch wire-array loads and a preparing method thereof. The self-adaptive fiber is prepared from aliphatic series oligomer diol with the molecular weight of 500-10000, high-symmetry aromatic diisocyanate and a high-symmetry aromatic diamine compound. According to the preparing method of the self-adaptive fiber, at first, aliphatic series oligomer diol with a certain mole number and high-symmetry aromatic diisocyanate with the mole number being twice that of diol are adopted for carrying out prepolymerization, and high-symmetry aromatic diamine is used for carrying out chain extension so that a spinning solution can be prepared; finally, any one of a solution dry method and a solution wet method is adopted for carrying out spinning, forming and processing. In the self-adaptive fiber, cohesion energy density in a hard chain section is high, binding force of the hard chain section is large, dimensional stability is high, rebound resilience is good, and stress stability is high; according to the self-adaptive fiber, during the whole service period, obvious stress relaxation is avoided, and rebound stress can be kept unchanged for a long term.

Provided are a method of preparing a cross-linked hyaluronic acid having an elasticity of about 50 to about 200 Pa and a viscosity of about 20 to about 100 Pa, including cross-linking hyaluronic acid with an epoxy-based cross-linking agent having at least two epoxy functional groups in an ethanol-containing aqueous alkaline; a method of preparing a cross-linked hyaluronic acid having an elasticity of about 400 to about 800 Pa and a viscosity of about 40 to about 100 Pa, including cross-linking the same cross-linked hyaluronic acid with the same epoxy-based cross-linking agent in an aqueous alkaline solution; and a combination of the cross-linked hyaluronic acids one having an elasticity of about 50 to about 200 Pa and a viscosity of about 20 to about 100 Pa and the other having an elasticity of about 400 to about 800 Pa and a viscosity of about 40 to about 100 Pa.

The invention relates to the technical field of production of non-woven fabrics, in particular to a high-elasticity recovery spun-bonded non-woven fabric and a preparation method thereof. The non-woven fabric is prepared from the following raw materials in percentage by weight of 0-50% of polypropylene; 0-5% of a slipping agent; and the balance of thermoplastic elastomer. The preparation method comprises the steps of mixing the raw materials to form a mixture, and controlling the melt index of the mixture to be 55-100g / 10min, the gram weight of the non-woven fabric to be 10-200g / m <2>, the fiber diameter to be 10-30mu m, the elongation to be 80-1000% and the elastic recovery rate to be 55-95%. The invention further discloses a preparation method of the high-elasticity recovery spun-bondednon-woven fabric. The prepared non-woven fabric can be applied to the fields of medical treatment and public health and clothes, and the prepared non-woven fabric is good in elasticity, stability andbreathability, low in preparation cost, environmentally friendly and worthy of wide application and popularization.

A low-density polyurethane gel composition used for reducing vibration and noise of underwater acoustic equipment is prepared from the organic chemical containing hydroxy group, the organic compound containing isocyanate group and diluent. Its advantages are high acoustic penetrability, low specific weight, not freezing at low temp and high viscoelasticity.

The present invention discloses a method for improving the liquidity of a viscoelastic fluid via high frequency ultrasounds. High frequency ultrasonic waves are introduced into the viscoelastic fluid by utilizing an ultrasound amplitude-change pole supplied with power by an ultrasonic power supply to generate a large amount of bubbles, and the bubbles are detonated by shear movement generated by the ultrasonic amplitude-change pole, so that molecular chains wound together are scattered, the viscoelasticity of the viscoelastic fluid is lowered, and the fluidity of the viscoelastic fluid is improved. The method lowers the viscoelasticity of the fluid by way of scattering the molecular chains wound together, but does not change the molecular structure, therefore, the chemical property of the fluid is not changed; Scattered molecular chains can be recovered in the winding state along with Brownian motion step by step after being poured, so that the high viscoelasticity of the viscoelastic fluid can be recovered, and connected channels are better protected. The method lowers the viscoelasticity of the viscoelastic fluid on the basis of the high frequency ultrasonic shear movement without high temperature, as a result, extra thermal stress and transformation are not introduced into a chip in a pouring process.

The invention provides a preparation method of an ionic hydrogel-based artificial nervous tissue engineering material, which comprises the following steps: (1)preparation of a prepolymer solution: byusing acrylamide as a monomer and ammonium persulfate as an initiator, sequentially adding acrylamide, polylysine, N,N '-methylene bisacrylamide, ammonium persulfate and N, N, N ', N'-tetramethylethylenediamine to form the prepolymer solution; and (2)preparation of the hydrogel material: adding the prepolymer solution into a template, and reacting for 3-4 hours under ultraviolet irradiation to form the hydrogel material. The technical problem that in the prior art, a material capable of being effectively applied to nervous system injury reparation does not exist, and particularly a material capable of reconstructing neuroelectric signal conduction in the early stage is solved.

The invention discloses a high-temperature-resistant clean acidic fracturing fluid and a preparation method thereof. The fracturing fluid comprises the following formula components: a viscoelastic surfactant ves-c, hydrochloric acid, acetic acid, citric acid, oxalic acid, an anti-swelling agent JSH and a corrosion inhibitor. According to the proportioning scheme, the high-temperature-resistant clean acidic fracturing fluid is prepared from the following components in parts by mass: 0.3-0.5 part of a viscoelastic surfactant ves-c; 3-4 parts of hydrochloric acid; 4-5 parts of acetic acid; 0.5-1part of citric acid; 0.5-1 part of oxalic acid; 1-1.5 parts of an anti-swelling agent JSH; and 0.3-0.5 part of a corrosion inhibitor . The fracturing fluid prepared by the preparation method disclosedby the invention is used for delaying the acid rock reaction rate, achieves deep acidification of a stratum without damage, and improves the fracturing effect of the acid fracturing fluid.

The invention discloses a waterproof encapsulating material and preparation method thereof and relates to a plastic composition based on polyurethane and epoxy resin and a preparation method thereof. The invention aims to provide a waterproof encapsulating material which has high waterproofness, excellent electrical property and flexibly controlled mechanical property and a preparation method thereof. The waterproof encapsulating material comprises components A and B, wherein the component A is polyurethane prepolymer, or epoxy resin, or mixture of polyurethane prepolymer and epoxy resin; the polyurethane prepolymer comprises isocyanate and high-molecular-weight polyol; the component B comprises a curing agent, a reaction accelerant, an auxiliary and a silane coupling agent. The preparation method of the waterproof encapsulating material comprises the following steps: preparing the polyurethane prepolymer; preparing the component A; preparing the component B; mixing and pouring, and curing at room temperature. The waterproof encapsulating material prepared by the invention has corrosion resistance, high waterproofness, excellent electric property, strong tenacity, and flexibly controlled mechanical property. The waterproof encapsulating material is used for the encapsulating field of the underwater electric appliance.

Provided herein are compounds, compositions, and methods for modifying mucus, including modifying mucus using nitric oxide-releasing biopolymers (e.g., NO-releasing chitosan oligosaccharides). In some embodiments, a compound, composition, and / or method of the present invention modifies one or more properties of mucus to increase mucus clearance in a subject and / or prevents the growth or kills one or more pathogens present in mucus of a subject.

The invention relates to a preparation method of high-viscoelasticity coupling material for non-fragrant soybean oil thermosetting web offset ink, comprising the following steps: in a standard normal-pressure kettle, adding 40+ / -1 parts of non-fragrant ink oil and 12+ / -0.5 parts of industrial soybean oil into the kettle according to parts by weight; adding 43+ / -1 parts of high-viscosity rosin modified phenolic resin while stirring for raising the temperature; keeping warm at the temperature of 180+ / -2 DEG C until resin is totally dissolved; stopping heating, and adding 4+ / -1 parts of non-fragrant ink oil; adjusting viscosity to 65000+ / -2000 MPa.s / 25 DEG C by the non-fragrant ink oil; adding 0.73+ / -0.01 part of gelling agent, and reacting at the temperature of 175+ / -2 DEG C; sampling and detecting per 0.5 hour; when viscosity is 500000+ / -50000 MPa.s / 25 DEG C, stopping temperature reduction reaction to obtain the product; and at the temperature of 135+ / -5 DEG C, filtering and packaging according to the normal ink coupling material production procedures. The high-viscoelasticity coupling material of the invention has favourable viscoelasticity and dissolubility in non-fragrant kerosene, has favourable performance in non-fragrant soybean oil thermosetting web offset ink and can satisfy high-speed and exquisite thermosetting web offset ink printing. The high-viscoelasticity coupling material has favourable dot reproduction, printability, simple technology and obvious effect.

The present invention addresses the problem of providing a good-texture healthy boiled noodle and a good-texture healthy raw noodle in which the health effect of calcium alginate is given to the noodle, the original noodle texture is not lost, the effective health effect of calcium alginate and excellent texture are provided. In order to solve the problem, a method for manufacturing boiled noodlesor raw noodles, employs noodle manufacturing steps of the noodle manufacturing method, including: (A) a kneading step for adding kneading water to a noodles-manufacturing raw material powder obtainedby mixing a raw material containing wheat flour, so as to knead dough; and (B) a noodle manufacturing step for shaping the dough into noodle strings, wherein 270-mesh-pass finely ground calcium alginate powder is blended into the noodles-manufacturing powder in a proportion of 4-8 parts by mass with respect to 100 parts by mass of the noodles-manufacturing raw material powder. As a result, a healthy boiled noodle or a healthy raw noodle, in which the health function of calcium alginate and the high texture of the noodle are maintained, is manufactured. The present invention provides a good-texture healthy boiled noodle or a good-texture healthy raw noodle in which a health effect such as the effect of suppressing blood glucose level rise after eating is effectively maintained, and, in manufacturing of a noodle, the original noodle texture is maintained without causing a decrease of texture or a decrease of viscoelasticity and the like of a noodle structure that occurs when calcium alginate is added.