36results about How to "Make up for performance deficiencies" patented technology

The invention discloses a flexible strain sensor based on nanocellulose-carbon nanotube/polyacrylamide conductive hydrogel. The preparation method of the flexible strain sensor comprises the followingsteps: (1) preparing a TEMPO nanocellulose suspension; (2) preparing a carbon nanotube dispersion; (3) preparing TEMPO nanocellulose-carbon nanotube/polyacrylamide conductive hydrogel; and (4) attaching two separate copper electrodes to both sides of the hydrogel so as to obtain the flexible strain sensor based on the nanocellulose-carbon nanotube/polyacrylamide conductive hydrogel. The sensor has high flexibility, stretchability, high mechanical properties, high electrical conductivity and strain sensitivity.

The invention discloses superfine composite modified kaolin powder, a preparation method and the application thereof. The powder consists of the following components by weight portion: 75-85 portions of calcined kaolin, 15-20 portions of wollastonite, 1-2 portions of silane coupler, and 0.8-1.2 portions of stearic acid. The preparation method is as follows: the wollastonite is added to the calcined kaolin powder, heated to the temperature of 100-110 DEG C, kept warm for 5-10min, and then added with the coupler, heated to the temperature of 145-155 DEG C, kept warm for 6-10min, then cooled to the temperature of 95-105 DEG C, added with the stearic acid to obtain the powder. The powder is applied to tread rubber of light car tires, water paint for building exterior wall and PE shed film material. Compared with the prior art, the superfine composite modified kaolin powder has good surface activity and dispersibility, good compatibility with other materials, excellent processing flowability, and can better meet the requirements of composite materials for high strength and high performance.

The invention relates to a fire-retardant ACS/PVC plastic alloy and a manufacturing method thereof. The alloy uses ACS resin and PVC resin as base materials; and compound fire retardant, stabilizer, compatilizer, processing aid, antioxidant and lubricant are added into the base materials in proportion by weight, then the materials are mixed at high speed, and the mixture is blended, extruded and granulated in a double-screw extruder to form the alloy. The prepared fire-retardant ACS/PVC plastic alloy has the advantages of good fire-retardant property, weather resisting property, electrostatic resistance, mechanical property and processing property, can be widely applied in the fields of electron, electrical appliances, communication, instruments, building materials, automobile parts and the like, and is an engineering plastic alloy with good development prospect.

The invention discloses a formation method for a lithium ion battery, which comprises the following steps of: 1, providing a lithium ion battery, wherein the lithium ion battery contains n anode materials, n is not less than 2, the charging capacity of the first anode material is set as C1,...the charging capacity of the n(th) anode material is set as Cn, and the platform voltage Vn of the n(th) anode material is greater than the platform voltage Vn-1 of the n-1(th) anode material; and 2, performing constant-current time-limiting charging on the lithium ion battery by a current I1, performing constant-current voltage-limiting charging on the lithium ion battery by a current I1' and with a cut-off voltage V1', ...performing constant-current voltage-limiting charging on the lithium ion battery by a current In, and performing constant-current voltage-limiting charging on the lithium ion battery by a current In' and with a cut-off voltage Vn'. According to the formation method for the lithium ion battery disclosed by the invention, the formation current and time are set according to the respective platforms and nominal capacities of the mixed anode materials, so that the mixed anode materials can be adequately activated, and the capacity, cycle performance and thickness can be improved.

The invention belongs to the field of composite materials, and concretely relates to a nano-hydroxyapatite/carboxymethyl chitosan/poly(lactic-co-glycolic acid) micro-nano hybrid drug-loaded scaffold and a bionic preparation method thereof. The three-dimensional bionic hybrid drug-loaded scaffold is prepared through combining solvent evaporation and freeze drying technologies by using a high speed emulsifying machine via adopting nano-hydroxyapatite and carboxymethyl chitosan as a water phase and an emulsion continuous phase, adopting a methylene chloride solution of poly(lactic-co-glycolic acid) as an oil phase and an emulsion dispersion phase, using glutaraldehyde as a cross-linking agent to immobilize the carboxymethyl chitosan in the continuous phase and adopting the main component icariin in a traditional Chinese medicine epimeddium as a carrier drug. The preparation method has the advantages of simple preparation process and mild reaction conditions, and the obtained scaffold overcomes the performance defects of single natural polymer materials or synthetic polymer materials, has the advantages of intercommunicated pores, uniform pore diameter, figurability, slow drug release, good bone bonding ability and good biocompatibility, and is expected to become a new osteoporosis treatment composite material.

The invention discloses a preparation process for a compound plasticizer, in particular to a preparation method for a compound plasticizer by utilizing the biodegradation. The invention uses the primary products of renewable and biodegradable vegetable oil as the raw materials, the raw materials are stirred under the condition of the temperature being controlled between 0 and 50 DEG C, the iodine value of the mixed vegetable oil is controlled between 100 and 150 through different preparation portions of different vegetable oil, the viscosity is controlled between 250MPa.s and 380MPa.s, the acid value is controlled below 2.0, and compound materials are prepared; the compound materials are added with phosphoric acid, alkali, etc, and finally are treated by hydrogen peroxide, formaldehyde, etc. to obtain the product. The preparation method has the advantages of clean and environment-friendly production process, non-toxicity and biodegradability of the product, no harm to the environment and good performance of the product. The preparation method can be widely used in various occasions with vegetable oil.

The invention provides biological ink, a preparation method and an application thereof, an abdominal wall repair patch stent and a preparation method thereof, and belongs to the technical field of tissue engineering. The biological ink comprises a polymer, a solvent capable of dissolving the polymer and aloe powder, wherein the polymer comprises thermoplastic polyurethane, polylactic acid or polycaprolactone. The biological ink disclosed by the invention contains the polymer, the polymer has good mechanical properties and biocompatibility, and by adding the aloe powder, the biocompatibility ofthe biological ink can be improved; and various anti-inflammatory and regeneration-promoting components contained in aloe can be fully utilized to effectively avoid inflammatory infection at wounds,improve the growth and propagation capacity of damaged cells and enhance the antibacterial and growth-promoting capacities of the biological ink, thereby making up for the performance defects of the existing single-material biological ink. The biological ink disclosed by the invention is used for preparing the biological stent, and the obtained biological stent has good mechanical properties, biocompatibility and biological regenerability.

The invention discloses a biodegradable plastic film and a preparation method thereof. The matrix resin of the biodegradable film refers to LDPE resins and LLDPE resins according to a mass ratio of 3:1; 30% of a composite modified polyolefin degradation master batch is added into the matrix resin; the composite modified polyolefin degradation master batch comprises the following raw materials in parts by weight: 55-75 parts of superfine composite modified inorganic powder, 1.5-2.5 parts of a compound degradation promoter, 25-35 parts of LDPE resin and 2.5-5 parts of low-molecular polyethylene.According to the addition of the composite modified polyolefin degradation master batch, the tensile strength and elongation at break of the plastic film are improved, the longitudinal tensile strength can reach 21-24 MPa, and the lateral tensile strength can reach 23-25 MPa; the longitudinal elongation at break can reach 665-680% and the transverse elongation at break can reach 875-885%; moreover, the plastic film has excellent biodegradability, the retention rate of the longitudinal elongation at break of film fragments after degradation is less than or equal to 5.5%, and the retention rateof the transverse elongation at break is less than or equal to 5.5%. The biodegradable plastic film can be applied to outer surface protection of various products in a plurality of fields.

The invention discloses a self-defining multi-media file playing engine which is mainly composed of a main control device, a binding device, a loader, a time driver, a resource stack unit, a resolver, an audio controller and a rendering controller. The invention further discloses a self-defining multi-media file playing method based on the self-defining multi-media file playing engine. The method comprises a starting playing method and a dragging and resuming playing method. By means of the self-defining multi-media file playing engine and method, a self-defining multi-media file can be played, a five-minute media file is less than 3 M, the bottleneck of the unsmooth multi-media file transmitting in the internet application due to the bandwidth is broken through, the header and contents need to be combined before playing, so that safety of content copyright and convenience of distributed deployment are guaranteed, and the blank market is filled.

The invention discloses a 3D printing material and a preparation method thereof. The 3D printing material is formed by the following formula components by mass: 10-20 parts of graphite powder, 2-4 parts of a catalyst, 6-8 parts of polyether polyol, 2-3 parts of vinyl triethoxy silane, 3-6 parts of inorganic powder, 2-6 parts of nano zirconium dioxide, 13-15 parts of vinyl ester resin, 1-2 parts of food-grade pigment, 6-10 parts of expanded perlite, 10-20 parts of wood fiber, 4-6 parts of isocyanate, 3-5 parts of food-grade synthetic wax, and 1-3 parts of an organic solvent. The prepared 3D printing material is non-toxic, low carbon and environmental, and has the excellent combination property, and the higher economic value and the broad market prospect.

The invention relates to water-absorbent resin and a preparation method thereof. The preparation method comprises the following steps: a, fine powder granulation: mixing water-absorbent resin micro-powder prepared by aqueous solution polymerization and reversed-phase suspension polymerization processes with lignocellulose according to a certain proportion, and adding deionized water and a swellingaid to uniformly swell the mixture to form hydrogel particles; b, drying: drying the hydrogel particles prepared in the step a until the moisture content is lower than 3%; c, grinding and screening:grinding and screening the dried particles prepared in the step b to obtain raw powder with the particle size distribution of 150-850 microns; and d, surface crosslinking: uniformly spraying a surfacecrosslinking treatment solution into the raw powder obtained in the step c, and carrying out heat treatment to obtain a finished product. The water-absorbent resin prepared by the method has specialmorphology and excellent comprehensive performance and has high diffusion, high pressurization, high absorption speed and high water-retaining property, micro powder is effectively recycled, dust pollution is reduced, and the production cost is lowered.

The invention relates to the technical field of composite membranes, in particular to an antibacterial composite membrane containing PEC, KGM and nano TiO2 and a preparation method thereof.The antibacterial composite membrane containing PEC, KGM and nano TiO2 is prepared from, by weight, 0.6%-1% of pectin (PEC), 0.5%-1.0% of konjac glucomannan (KGM), 0.5%-0.7% of glycerin, 0.5%-4.5% of nano TiO2 and the balance distilled water; the antibacterial composite film disclosed by the invention has excellent tensile property, high water vapor permeability and low oil permeability coefficient, and can promote the diffusion of moisture in fresh meat, reduce the moisture content of the meat and delay the decay of the meat; the loss of flavor substances can be reduced, the loss of fat can be blocked, and the flavor of fresh meat is kept; after the nano TiO2 is added into the antibacterial composite film, the mechanical property, the antibacterial activity, the barrier property and the like of the antibacterial composite film are obviously improved; the nano TiO2 can inhibit the breeding of microorganisms on the surface of food, can effectively make up the performance defects of the PEC/KGM composite film, and can enhance the antibacterial effect and mechanical properties of the PEC/KGM composite film.