259results about How to "Not easy to shrink" patented technology

The invention discloses a composite natural polymer gel material with a cross-linking agent. The material comprises hydrogel, organogel, aerogel and bioplastics and mainly overcomes the problem of low mechanical strength of conventional natural polymer gel materials. According to the invention, a certain amount of the cross-linking agent is added into a natural polymer water-based solution or dispersion liquid, then stirring is carried out, the obtained mixture is placed in a non-solvent for physical cross-linking, and then washing is carried out so as to obtain composite natural polymer hydrogel; water in the composite natural polymer hydrogel is replaced with an organic solution so as to prepare composite natural polymer organogel; the composite natural polymer hydrogel or organogel is dried so as to prepare composite natural polymer aerogel; the composite natural polymer aerogel is subjected to hydrophobic treatment so as to obtain hydrophobic aerogel; the composite natural polymer aerogel is subjected to heat treatment so as to obtain carbon aerogel; and one or more selected from the above-mentioned gel materials are subjected to high-temperature pressing so as to prepare composite natural polymer bioplastics. The composite natural polymer gel material prepared in the invention has the advantages of excellent mechanical properties, a high specific surface area, high elongation at break, etc., and can be easily processed into molded products of a plurality of forms.

The invention discloses a lithium ion battery composite diaphragm and a preparation method and an application thereof, belonging to the technical field of lithium ion batteries. The composite diaphragm comprises a polyolefin microporous membrane, a polymer microsphere based coating on one side surface of the polyolefin microporous membrane, and an inorganic ceramic-based coating on the other side surface of the polyolefin microporous membrane. The lithium ion battery composite diaphragm has good air permeability, liquid retaining capability and high-temperature resistance and can remarkably improve the security and the circulation property of the battery. The melting point or softening point of the polymer microsphere-based coating in the composite diaphragm is 90-140 DEG C, and when the temperature of the battery is increased, the polymer microsphere based coating is molten or swelled within a short time, then the apertures of the polyolefin microporous membrane are blocked rapidly, the thermal turn-off effect of the diaphragm is achieved, a lithium ion conveying channel is cut off, and short circuit inside the battery is prevented; meanwhile as ceramic grains inside the inorganic ceramic-based coating have the high-temperature resistance property, the polyolefin microporous membrane is effectively prevented from shrinkage, and the situation that positive and negative films directly come into contact to cause short circuit of the battery.

The invention relates to a method for preparing graphene crosslinked type organic aerogel and carbon aerogel by normal-pressure drying, which takes phenols (P), amines, aldehydes, catalyst and solvent as a reaction system and graphene substances containing active functional groups as a cross-linking agent. The method comprises the steps of: curing to obtain organogel, and then carrying out normal-pressure drying to obtain the organic aerogel; and carrying out pyrolysis on the organic aerogel in the inert atmosphere at the temperature of 500-1600 DEG C to obtain the graphene crosslinked type carbon aerogel. The preparation method of the organic aerogel and the carbon aerogel is simple and rapid in technology; the conventional supercritical drying technology is avoided, and the prepared novel organic aerogel and carbon aerogel materials taking graphene as framework have new performances and wide application prospect; and the industrial production of the carbon aerogel can be expected to be realized.

The invention relates to a thermoplastic polyurethane modified composite material for FDM (frequency division multiplexing) 3D printing and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 70-95 parts of thermoplastic polyurethane, 1-5 parts of antioxidant, 1-5 parts of hydrolysis-resistant stabilizer, 1-5 parts of compatilizer, 1-5 parts of lubricant and 1-10 parts of other assistant. Compared with the prior art, the antioxidant, hydrolysis-resistant stabilizer, lubricant and other assistants are added, so that the modified composite material has the advantages of favorable mechanical properties, high elasticity, favorable wear resistance, higher heat stability, hydrolysis resistance, higher oxidation resistance and higher processability. When being used for FDM 3D printing, the thermoplastic polyurethane modified composite material has the characteristics of smooth printing process, no odor, smooth printing product surface, beautiful appearance, stable size, low tendency to shrinkage, favorable mechanical properties, high flexibility, high heat stability, high hydrolysis resistance, high oxidation resistance and high processability.

A vacuum chuck is provided for attaining uniform polishing of an object to be sucked. The vacuum chuck is provided by integrating a suction layer and a compact substance layer, which are formed of a porous ceramics, and positioning the suction layer on a side of sucking the object to be sucked. The vacuum chuck is provided with a suction board for sucking and holding the object to be sucked. The compact substance layer is formed by impregnating the porous ceramics with a metal.

The invention discloses a foaming composition for a water tank of a solar water heater, which is characterized by comprising the following main raw materials: a polyether foaming agent, sodium bicarbonate, chitosan and hollow glass beads. The improved polyether rigid foam composition can be used for reducing the phenomena that after being sprayed from a glossy jar and formed, a polyurethane material has high contractibility, the heat preservation effect of the water tank of the solar water heater is influenced and the water tank is deformed, bulged and barred, or even cracked.

The invention relates to a log door leaf and its manufacturing method, solves the problem of the paint cracking caused by contraction or expansion of transom and closure plate of door, including three steps: produce transom and closure plate of door by wood; pain each of them wholly; pain binder on the linking part of then, making leaf. There is sew for contraction remained on each linking part of each transom and closure plate of door, even if contraction or expansion happens somewhere, it will only affect the width of the sew, no to the whole appearance; the linking part of each transom and closure plate of door is strengthened by transversal cork, making the leaf stabler.

The invention discloses a table panel which comprises an upper panel, a lower bottom plate and at least a pair of embedded pieces, wherein the upper panel is provided with a smooth external surface; the lower bottom plate is provided with a plurality of pits; the pits are arrayed on the lower bottom plate in a staggered manner; the top surfaces of the pits are propped against the internal surface of the upper panel; and the embedded pieces are arranged on the two opposite sides between the upper panel and the lower bottom plate. The top surfaces and side walls of the pits can bear pressure from the upper panel, so that the compressive capacity of the upper panel is improved, and the higher strength of the table panel even with less thickness can be ensured. Particularly, the total area of the pits account for 30-70% of the area of the lower bottom plate, the contact area of the top surfaces of the pits with the internal surface of the upper panel is larger, and the strength of the table panel is further improved. Particularly, when the area of the single pit is 1-15cm<2>, the number of the pits is increased, that is, the area of the top surfaces and the side walls of the pits is increased, and the strength of the table panel is greatly improved.

The invention discloses a wood drying process. The wood drying process comprises the steps of 1, preheating; 2, high-temperature and high-humidity treatment; 3, drying; 4, maintenance. When the wood drying process is adopted for drying wood, the surface stress and internal stress of wood can be eliminated, surface cracking or internal cracking of wood can be prevented, the original quality of wood is maintained, defects such as air shrinkage, bending, crinkling and deformation do not occur easily, the rate of wood damage caused by improper drying is reduced greatly, and meanwhile, energy is saved and drying time is shortened.

The invention relates to an ice-temperature modified atmosphere preserved water cooked minced fillet octopus ball. The ice-temperature modified atmosphere preserved water cooked minced fillet octopus ball is prepared by heating, boiling and forming minced fillet, starch, emulsified slurry, egg white, starch glue, sodium glutamate, granulated sugar, a taste promoter, sugar essence, Tarinsan, Tarilin, seafood essence, an octopus head, ice water and muddy garlic. The preparation method comprises the following steps: placing 33kg of refrigerated minced fillet into a kneader for kneading; then adding 2.1ks of salt, 22ks of starch, 24ks of emulsified slurry, 1.1ks of egg white, 0.18ks of starch glue, 1.1ks of sodium glutamate, 2ks of granulated sugar, 0.44ks of taste promoter, 0.03ks of sugar essence, 0.1ks of Tarinsan, 0.1ks of Tarilin, 0.5ks of seafood essence, 9ks of octopus head, 3.6ks of ice water and 1.8ks of muddy garlic; kneading and mixing the raw materials evenly to prepare the fish balls or fish cake; then placing the fish balls or fish cake into a sterile cooling chamber for cooling down the fish balls or fish cake; carrying out the vacuum blowup packaging of the cooled fish balls or fish cake; and then storing the fish balls or fish cake in a non-frozen state at a temperature of between 0 and 3 DEG C below zero so as to reach the aim of preservation.

The invention discloses an easily processed silicon brass alloy. The alloy comprises the following components in percentage by weight: 60-63% of copper (Cu), 0.50-0.90% of silicon (Si), 0.50-0.80% of aluminum (Al), 0.10-0.20% of lead (Pb), less than 0.3% of other elements, and the balance of zinc (Zn) and inevitable impurities, wherein the sum of copper, silicon, aluminum and zinc is more than 99.60%, and other elements are a combination of tin (Sn), manganese (Mn), ferrum (Fe) and nickel (Ni). The invention further comprises a preparation method of the silicon brass alloy. The prepared silicon brass alloy is obviously higher than common lead brass in the performances of tensile strength, elongation rate, hardness and anti-zinc removal, the casting processability is good, practical production and application demands can be met, the precipitation of metals can meet the standard requirements, and the easily processed silicon brass alloy can be widely applied to water heating, valves and other various industries having limit on the precipitation of metal pollutants.

The invention relates to a preparation method of artificial skin, in particular to a preparation method of artificial skin with hair follicles and the skin made by the method, belonging to biomedical field. The preparation method comprises the following steps: (1) preparing the epithelial cells of the hair follicle; (2) culturing the dermal papilla cells; (3) culturing the artificial skin with hair follicles. The preparation method of artificial skin has the advantages that: (1) the invention originally prepares artificial skin with hair follicles on skin support by hair follicle cells, and reduces the antigenicity greatly compared with the artificial skin made by animal cells; (2) the artificial skin comprises hair follicles, and enable to do physiological functions of skin; (3) the artificial skin is not easy to shrink but easy to absorb; (4) the artificial skin can be used as wound-cover material for large area burn wounded person in clinic and accelerates the wound to heal naturally; (5) the invention resolves the trouble of skin source for large area burn; (6) the preparation method is reasonable in design, convenient in operation and easy in scale production.

The invention relates to the technical field of medicine, in particular to a composite scaffold material and a preparation method and application thereof. The provided composite scaffold material includes a charged fiber skeleton material, and the fiber skeleton material is coated with alternately superimposed positive charge biocompatibility materials and negative charge biocompatibility materials through electrostatic attraction. As the fiber skeleton material is coated with the alternately superimposed positive charge biocompatibility materials and negative charge biocompatibility materialsthrough electrostatic attraction, the provided composite scaffold material overcomes the defects of an existing scaffold material, such as poor hydrophilicity, poor biocompatibility, poor histocyte adhesion ability and weak biological induction activity, has better applicability when used in tissue adhesion, sealing, leaking stoppage, hemostasis, isolation, repair and adhesion prevention and thelike, and can be used for preparation of carriers (such as sustained release carriers) of drugs, tissue engineering scaffold materials and the like, and thus the composite scaffold material can be widely used.

The invention discloses a veneering water-proofing multi-layer solid wood floor, comprising a base material board (2) which is a multi-layer solid wood compound board, the upper part of the base material board (2) is provided with a plastic wear-resisting PVC veneer (1), the surface of the plastic wear-resisting PVC veneer (1) is provided with an aluminium oxide wear-resisting layer. The plastic wear-resisting PVC veneer (1) can adopt various fancies such as wood grains, bamboo grains and various artistic floor surfaces suitable for floors. The wood grains of adjacent solid wood single laminating board of the multi-layer solid wood compound board are intersected vertically and horizontally, and the laminating boards are bonded and heat-pressed into a whole by bonders. The material is stable and is nor easy to expand and deform, the water-proofing effect is good, and the floor can not be foamed and expanded when in water, and is suitable for households or public places; the floor surface has high hardness, the fancy kinds is multiple, and the decorative effect is plentiful; the production speed is rapid, the manufacturing cost is low, and the floor is easy to popularize; the floor not only can meet the using requirements of people, but also can protect forest resource and environment.

The invention discloses a baking-free brick produced from residual slags generated by the indirect coal liquefaction and a production method thereof. The baking-free brick comprises the following raw materials in parts by weight: 30 to 40 parts of slags generated by indirect coal liquefaction and gasification, 30 to 50 parts of thermodynamic slags generated by the indirect coal liquefaction, 10 to 20 parts of dust-removing ash generated by the indirect coal liquefaction, 6 to 15 parts of cement, 8 to 10 parts of calcined lime and 3 to 4 parts of gypsum. The production method comprises the following steps of: carrying out pre-stirring, aging, secondary stirring, molding, steam curing, demolding, sorting and the like on the raw materials. The method realizes reutilization of the residual slags, and is simple and convenient in preparation process, low in cost and short in production period. The prepared baking-free brick body is difficult to deform, crack and contract as well as smooth in surface and beautiful in appearance.

The invention discloses a high-strength composite corrugated fiber foam cement heat insulation material. Aiming at the defects that organic materials such as polyphenyl, extruded sheet and polyurethane, belonging to petroleum extractant, are complicated in structure, easy to age, inflammable, easy to crack, easy to seep and are short in service life, and inorganic materials such as a foam cement heat insulation board cannot reach the use strength of a wall body, the invention designs the high-strength composite corrugated fiber foam cement heat insulation material. The heat insulation material comprises corrugated fiber cement heat insulation material, composite foam cement heat insulation material, a fixed connecting support component, and concave-convex or male-female connecting mortise and tenon joints. The design purposes of meeting the use strength of a building outer wall and reducing the cost are realized by utilizing the performances of low heat conductivity coefficient, non-inflammability, high compression resistance and breaking strength of the foam cement, foamed ceramics and corrugated fiber cement plate and a pouring extrusion and foam technique. The high-strength composite corrugated fiber foam cement heat insulation material has the characteristics that the performances of heat preservation and insulation, non-inflammability and fireproofing, sound insulation and noise reduction, lightweight earthquake and acid rain resistance can be improved, and the material has the advantages on performance that the structure is simple, the material is saved, the mounting and dismounting are convenient, the construction efficiency is high, the service life is long, the cost is low, the material can be used as a finished wall body and recycled, and is energy-saving and environmental-protection.

The invention relates to a method for forging a step shaft with electroslag ingots. The method is suitable for forging the step shaft with large step diameter. A dead head end of an electroslag ingot is disposed on a upsetting drain cap for upsetting. The upset dead head end of the electroslag ingot forms a drum-shaped convex face and is elongated, due to the fact that the dead head end is the drum-shaped convex face, the dead head end is less prone to sinking, only a small part of dead head end needs to be cut off at last, pliers handle pressing with a hydraulic press in the original method is omitted, and the method has the advantages that the method is material-saving, utilization rate of forged piece is improved, and production cost is lowered.

The invention discloses a manufacturing process of a wood door, which is characterized by comprising preparation, sanding operation, colorizing and bottom rolling treatment, lamination, trimming treatment, assembling operation, decorative and shaping fastening piece installation and final entire packaging. The process prevents expansion and contraction in door vertical frame, cross beam and other places. In the invention, the surface oil paint stripping and layering can be prevented by adopting half drying operation, paint spraying, a thermal leveling process and overall drying operation, time is saved and product quality is improved. At the same time, the invention also provides a half drying machine for half drying operation.

The invention relates to a carbon/carbon (C/C) composite material surface low-porosity complex-phase ceramic coating and a preparation method thereof. The preparation method comprises the following steps: previously carrying out sintering heat treatment on a ZrB2-SiC powder mixture for ultrasonic plasma spraying in a protective atmosphere, preparing a SiC inner coating and a ZrB2-SiC complex-phase ceramic coating respectively by an embedding process and an ultrasonic plasma spraying two-step process, and carrying out sintering heat treatment on the powder for spraying to sufficiently diffuse molecules so as to form a partial solid solution, thereby preparing the complex-phase ceramic coating with uniform phase distribution and lower porosity. After the ZrB2-SiC powder mixture is subjected to sintering heat treatment in the reducing protective atmosphere, the partial solid solution is formed in the sintering heat treatment process, and the solid solution can not easily shrink in the cooling process, thereby lowering the pores generated in the cooling process after coating spraying and further forming the low-porosity coating. Besides, in the sintering heat treatment process, the molecules interdiffuse, so that the finally prepared complex-phase ceramic coating has more uniform phase distribution.