46results about How to "Improve crystallization properties" patented technology

The present invention is generally directed to methods of producing an increase in the enrichment or recovery of preferred forms of IgG proteins. More particularly, the invention relates to subjecting preparations of such recombinant IgG proteins with a reduction/oxidation coupling reagent and optionally a chaotropic agent.

The invention provides a modified lithium manganese oxide electrode material for a lithium ion secondary battery, which is characterized in that the general formula is Li(4-x)A(x+y)Mn(5-y)O12.epsilonBOz. The synthesizing method comprises the following steps: weighing and mixing raw materials evenly in accordance with the stoichiometric ratio in the general formula and then adding the mixture of the raw materials to a container; adding an oxidizing solution, evening mixing and reacting for over 10 minutes, and then taking the materials out, washing and drying; and then carrying out high-temperature calcination and reaction for 1-30 hours at a temperature of 400-1200 DEG C under an oxygen-contained atmosphere, and cooling to obtain the modified lithium manganese oxide electrode material. Compared with an existing electrode material and a synthesizing technology, the modified lithium manganese oxide electrode material produced in the production process can improve the crystalline characteristic and the purity of products as well as the specific capacity, the initial coulomb efficiency, the cyclical stability and other characteristics in electrochemical property; and the modified lithium manganese oxide electrode material improves performances of the lithium ion battery, promotes the wider applications of the lithium ion battery and has significant economic meanings and practical value.

A crystallization method using a mask includes providing a substrate having a semiconductor layer; positioning a mask over the substrate, the mask having first, second and third blocks, each block having a periodic pattern including a plurality of transmitting regions and a blocking region, the periodic pattern of the first block having a first position, the periodic pattern of the second block having a second position, the periodic pattern of the third block having a third position, the first, second and third positions being different from each other; and crystallizing the semiconductor layer by irradiating a laser beam through the mask.

A crystallization method includes providing a substrate having a silicon thin film; positioning a laser mask having first to fourth blocks on the substrate, each block having a periodic pattern including a plurality of transmitting regions and a blocking region; and crystallizing the silicon thin film by irradiating a laser beam through the laser mask. A polycrystalline silicon film crystallized by this method is substantially free from a shot mark, and has uniform crystalline characteristics.

A memory cell (33) in which a variable resistive element (31) and a Schottky diode (32) are connected in series to each other. In a memory device, bit lines (BL0, BL1 and BL2) are arranged in a column direction, one end of the bit line (BL) is connected to a bit line decoder (34), and the other end thereof is connected to a reading circuit (37). Word lines (WL0, WL1 and WL2) are arranged in a row direction so as to intersect with the bit lines (BL), and both ends of the word line (WL) are connected to word line decoders (35 and 36). In other words, the bit line (BL) and the word line (WL) are arranged in a matrix and a memory cell (33) is located at a position where the bit line (BL) and the word line (WL) intersect with each other, which constitutes the memory device. An influence of a reading disturbance in the memory cell (33) and the memory device is reduced.

The invention discloses a special air conditioner wind wheel material with high rigidity, high heat resistance and low shrinkage, and a preparation method of the special air conditioner wind wheel material. The special air conditioner wind wheel material is composed of the following materials by weight: 33-68% of polypropylene resin, 5-10% of interface bonding agent, 15-35% of alkali-free glass fiber, 10-20% of mineral powder, 0.1-1% of nucleating agent, 1-5% of crystal whisker, 0.1-1% of antioxygen, and 0.1-2% of lubricant. The rigidity index of the wine wheel material is up to 7000Mpa, the molding shrinkage is 0.6%, both the rigidity index and the molding shrinkage are about the same as those of a universal SAN material wind wheel, and the best advantage is that the molding liquidity, the heat resistance and the toughness are all better than those of the SAN material wind wheel. All selected materials of the invention meet the environmental requirement of European Union ROSH. The raw materials of the special air conditioner wind wheel material are easy to get, the energy consumption is low, the machine wear rate is small, the cost is low, the recycling is easy, and the special air conditioner wind wheel material is suitable for replacing the SAN material wind wheel.

The invention discloses a biodegradable straw and a preparation method thereof. The straw comprises, by mass, 50%-80% of polylactic acid, 10%-40% of polyhydroxyalkanoate, 3%-12% of bamboo powder, 1%-2% of epoxidized soybean oil, 0.3%-1% of an aluminum-titanium coupling agent, 0.1%-1% of a lubricating agent and 0.1%-1% of an anti-hydrolysis agent. The preparation method comprises the following steps: uniformly stirring the bamboo powder and the aluminum-titanium coupling agent to obtain a bamboo powder pretreated material for later use; sequentially adding the epoxidized soybean oil, the bamboopowder pretreated material, the lubricant and the anti-hydrolysis agent into a resin mixture of the polylactic acid and the polyhydroxyalkanoate at a stirring speed of 100-250 r/min, and uniformly stirring to form a polylactic acid mixture; and adding the polylactic acid mixture into double-screw extrusion equipment, extruding a straw blank, and sequentially carrying out water cooling, air cooling, water removal and cutting on the straw blank under the traction of traction equipment to obtain the biodegradable straw product. The biodegradable straw material can effectively prolong the degradation time of the PLA straw, improve the mechanical properties of the PLA straw, and effectively improve the harmful bacterium inhibition ability of the straw.

The invention relates to the technical field of polylactic acid modification and aims to provide a method for accelerating crystallization of polylactic acid resin. The method comprises the specific steps of: adding a semi-crystalline polylactic acid resin and a polymer-type crystallization promoter into a mixing apparatus; then mixing well in the mixing apparatus; and extruding for granulation, so as to obtain a rapid crystallization modification polylactic acid resin. The method employs organic high-molecular polymer-type crystallization promoter to improve crystallization performance of the polylactic acid, and the promoter has good compatibility with polylactic acid, improves nucleation effect, accelerates crystallization of polylactic acid, and improves processability and thermal behavior of the polylactic acid. Furthermore, a commercialized semi-crystalline polymer polyvinylidene fluoride having similar melting point as polylactic acid is used as the crystallization promoter for polylactic acid, and a melt blending method can be employed. The method provided by the invention has simple process, low cost and can realize large-scale industrialized production.

The invention relates to a thermoplastic polyurethane elastomer composite material, a preparation method and an application thereof. The composite material comprises the following components: a hypocrystalline thermoplastic polyurethane elastomer and filler through surface treatment. The filler is a mixture of layered filler and granular filler in a mass ratio of 0.1: 1 to 5: 1, preferably 0.5:1 to 3:1. The composite material is prepared by fusing and blending, so that the crystallizing characteristic of a thermoplastic polyurethane elastomer product is improved, a low shrink thermoplastic polyurethane elastomer is obtained, the property of the material is ensured stable, and the obtained composite material can be used for a quick forming method of fused processing, for example, a fusing deposition quick forming method or a selective laser sintering method.

The invention discloses a high-barrier PE material. The high-barrier PE material comprises, by weight, 60-80 parts of polyethylene, 5-10 parts of hydroxyethyl acrylate, 1-5 parts of triphenyl phosphite, 10-20 parts of a polymer/nano-SiO2 composite material and 2-6 parts of a flame retardant. The PE is modified with the polymer/nano-SiO2 composite material, so the barrier property of the PE material is improved.

The invention relates to a making method of polylactic acid forming body, which enables polylactic acid to be continuously ejected to form the polylactic acid forming body with heat resistance. The making method is characterized in that at the time of the ejection of polylactic acid, the thermoform of the polylactic acid is performed in a metal die, the polylactic acid in the metal die is crystallized at constant temperature so as to achieve the effects of crystallization and heat resistance, and a finished product formed by die sinking ejection keeps good shape and does not deform. The making method can adopt a continuous method to produce polylactic acid products with heat resistance, all ejection products using the polylactic acid as materials can be made by the forming and processing process, and the polylactic acid after forming and processing has heat resistance and favorable mechanical characteristics.

The invention provides a method for improving frost resistance of edible fat by the inventor. In the process of refining edible fat particularly in the process of producing palm oil, a method of performing refinement and then performing fractionation is adopted, and a deodorizing technology in the refining process is specially adjusted, so that the purpose of adjusting the crystallization characteristics of palm liquid oil raw materials is achieved, so that the fractionation effect is obviously improved, and the quality of products is improved.

The present invention relates to a method of reducing and/or removing diglyceride from an edible oil, comprising a) admixing an edible oil with an acyl acceptor substrate and a fatty-acid CoA independent diglyceride: glycerol acyltransferase, wherein the fatty-acid CoA independent diglyceride: glycerol acyltransferase is characterized as an enzyme which in an edible oil is capable of transferring an acyl group from a diglyceride to glycerol. Preferably, the diglyceride: glycerol acyltransferase comprises the amino acid sequence motif GDSX, wherein X is one or more of the following amino acid residues L, A, V, I, F, Y, H, Q, T, N, M or S. Furthermore the present invention relates to the use of a fatty-acid CoA independent diglyceride: glycerol acyltransferase characterized as an enzyme which in an edible oil is capable of transferring an acyl group from a diglyceride to glycerol, in the manufacture of an edible oil, for reducing and/or removing (preferably selectively reducing and/or removing) diglyceride from said edible oil, and to the use of said enzyme in the manufacture of a foodstuff comprising an edible oil for improving the crystallization properties of said foodstuff.

A method for manufacturing a polysilicon ingot includes: (a) providing molten silicon in a container; (b) maintaining a surface temperature of the molten silicon higher than its melting point while decreasing the temperature of a base portion of the container to a temperature (T₁) lower than the melting point at a rate of at least 2.6° C./min; (c) increasing the temperature of the base portion to a temperature (T₂) lower than the melting point; (d) maintaining the surface temperature of the molten silicon higher than the melting point while decreasing and then increasing the temperature of the base portion to a temperature lower than the melting point of silicon; and (e) reducing the temperature of the molten silicon to form the polysilicon ingot.

The invention discloses flame-retardant polypropylene plastic. The flame-retardant polypropylene plastic comprises the following component in parts by weight: 70-80 parts of polypropylene resin, 40-50 parts of a fire retardant, 10-20 parts of terpene resin, 8-12 parts of nano-titania and 0.2-0.8 part of an antioxidant. By adding the fire retardant prepared by mixing ammonium polyphosphate, grafted maleic anhydride and nano-clay into the flame-retardant polypropylene plastic, ammonium polyphosphate and nano-clay in a compound flame-retardant polypropylene system can be uniformly dispersed, so that the flame-retardant efficiency is obviously improved, the crystallization property of a polypropylene matrix can be improved, and the tenacity of a material is improved.

The invention discloses a polyester resin composition, application thereof and a molded product. The polyester resin composition comprises the following components: 0-55 parts of polyester resin A with the melting temperature being more than 280 DEG C and less than 290 DEG C; 5-60 parts of polyester resin B with the melting temperature being greater than 290 DEG C and less than 300 DEG C; 5-60 parts of a white pigment; 0.1-5 parts of an inorganic nucleating agent; and 1-40 parts of filler. According to the invention, the polyester resin B with high crystallization capacity is compounded with the inorganic nucleating agent, so that the crystallization performance of the polyester resin composition can be greatly improved, the minimum curing time required by normal cooling and demolding of the molded product in the injection molding process is greatly shortened, and the development requirements of ultra-multi-mold-cavity and rapid cooling of a LED reflection support material can be wellmet; and meanwhile, the problem of interface micro-stripping between LED packaging silica gel and a metal material belt in the functional area can be well solved, and the ultrasonic scanning layeringresistance and the long-term use reliability are greatly improved.

A hollow-fiber porous membrane, comprising a hollow fiber-form porous membrane of vinylidene fluoride resin providing: a ratio F (L=200 mm, v=70%)/Pm⁴ of at least 7×10⁵ (m/day·μm⁴), wherein the ratio F (L=200 mm, v=70%)/Pm⁴ denotes a ratio between F (L=200 mm, v=70%) which is a value normalized to a porosity v=70% of a water permeation rate F (100 kPa, L=200 mm) measured at a test length L=200 mm under the conditions of a pressure difference of 100 kPa and a water temperature of 25° C. and a 4-th order value Pm⁴ of an average pore size Pm. The hollow-fiber porous membrane has an average pore size smaller than before leading to an improved ability of removing fine particles, while suppressing the lowering in water permeability. The hollow-fiber porous membrane is produced by melt-extrusion and low-temperature cooling of a starting composition including a resin material containing an ultra-high molecular weight resin component in a larger amount than before, and increased amounts of plasticizer and good solvent.