31results about How to "Reduced interfacial free energy" patented technology

The invention provides viscose containing natural antimicrobials. The viscose containing the natural antimicrobials comprises the viscose and the antimicrobials contained in the viscose. The viscose containing the natural antimicrobials is characterized in that the antimicrobials is natural indigowoad leaf extract powder, a natural indigowoad leaf extract powder solution added with dispersing agent is added into a viscose filature stock solution, the additive amount of the natural indigowoad leaf extract powder is 1%-7% of the quality of the viscose filature stock solution, the additive amount of the dispersing agent in the natural indigowoad leaf extract powder solution is 0.1%-1.0% of the quality of water in the natural indigowoad leaf extract powder solution. The preparation method of the viscose comprises the steps of dissolving the indigowoad leaf extract powder into water and adding the dispersing agent to obtain the indigowoad leaf extract powder solution, adding the indigowoad leaf extract powder solution to the viscose filature stock solution according to a ratio of 10%-14% of the quality of the viscose filature stock solution, and then shaping a obtained solution according to conventional wet spinning jet process to obtain the viscose. The viscose has a durable antibacterial function and has no side effect on human bodies. The preparation method has reasonable and simple technology, and is suitable for industrialized production.

The invention discloses a surface metallised ceramic and a manufacturing method thereof. The method comprises the following operation steps of immersing a metallised surface of the ceramic in an aluminium or aluminium alloy melt, making the metallised surface move with respect to the melt such that the aluminium or aluminium alloy melt wets the metallised surface of the ceramic, taking out the metallised surface of the ceramic from the melt and freely cooling the aluminium or aluminium alloy film attached to the surface, so as to obtain the ceramic with the surface connected with the aluminium or aluminium alloy film. Compared with prior art, the interface between the ceramic and the aluminium or the aluminium alloy film in the invention does not contain amorphous oxide. The aluminium or aluminium alloy crystal grains and the ceramic crystal grains are grown together. The internal organisations of the formed film are compact and do not contain oxide. The formed aluminium or aluminium alloy film has a thickness in a range from several microns to more than ten microns, is firm, and cannot easily fall off. The chessboard division peeling strength between the aluminium or the aluminium alloy film and the ceramic is proved, by experiments, to be greater than or equal to 4.1N/cm. The invention has wide application prospect in the surface metallising field of ceramic.

The invention discloses a preparation method of foamed polypropylene beads. The method comprises the following steps that 1, polypropylene resin, an active filler and auxiliaries are added into a high-speed mixing machine and mixed to be uniform at the temperature of 10-20 DEG C, and a polypropylene foaming material is obtained; 2, the polypropylene foaming material is added into a triple-screw extruder, plastification and mixing are conducted, a supercritical fluid is injected, the mouth mold pressure is controlled to be 5-25 MPa, the mouth mold temperature is 110-160 DEG C, instant pressure release is conducted through a mouth mold, foaming is conducted, and super-fine hole foamed polypropylene is obtained; 3, super-fine hole foamed polypropylene is subjected to mold surface water-ring hot-cutting granulation, drying and sieving, and the foamed polypropylene beads are obtained. The method is low in production cost, high in capacity, safe and environmentally friendly, no foaming agent decomposed residue exists in the prepared foamed polypropylene beads, secondary foaming can be conducted, the foaming ratio can be adjusted, the rebound resilience of a finished product is high, decomposing and recycling are easy, and the foamed polypropylene beads can be widely used in the fields of plastic packaging, transportation industry, military aerospace, office supplies and the like.

The invention provides an atorvastatin calcium tablet which comprises the following components of raw materials in parts by weight: 1-20 parts of atorvastatin calcium, 10-80 parts of a filling agent,20-40 parts of a disintegrant, 5-40 parts of an adhesive, 1-15 parts of a lubricant and 1-20 parts of a calcium enhancing agent. The atorvastatin calcium tablet provided by the invention has the advantages of being high in stability, good in dissolubility, high in bioavailability, and the like, and is good in clinical application prospect.

The invention discloses blood pretreatment liquor which includes the following components: sodium chloride, monopotassium phosphate, dibasic sodium phosphate, bovine serium albumin, an ionic detergent, a protein protectant, Proclin-300 and water; the interfacial free energy can be reduced by the ionic detergent, and the interfacial properties of to-be-removed objects and the matrix can be changed, glycerol, active polysaccharides and the biological activity of bovine serium albumin can be fused for function enhancement through like charges repelling, filtering or magnetic adsorption of an adsorption layer. With the utilization of the blood pretreatment liquor provided by the invention, after centrifuging blood, white blood cells, infected factors and target cells and the like are concentrated and purified, and the surface bioactivity of the cells cannot be damaged.

The invention discloses oil-in-water type menthol ointment and a preparation method thereof. The oil-in-water type menthol ointment comprises glycerol, camphor, menthol, eucalyptus globulus leaf oil, a liquorice extract, vitamin E, allantoin, citronella oil and the like. The oil-in-water type menthol ointment has the effects of cooling and refreshing, diminishing inflammation, relieving itching and repelling mosquitoes, and has the advantages of being high in stability, low in irritation and small in oily feeling.

The invention discloses a preparation method of starch microspheres with small particle sizes. The preparation method comprises steps as follows: (1) preparation of a starch solution; (2) preparation of a polyvinylpyrrolidone solution; (3) forming of an aqueous two-phase emulsion through high-speed shearing and emulsification performed after the polyvinylpyrrolidone solution is added to the starch solution; (4) balling through retrogradation and solidification, separation and washing: the emulsified aqueous two-phase emulsion is put in an environment at the temperature of 4-30 DEG C to be retrograded for 24 h, then taken out and subjected to centrifugal separation for 10-15 min, a substrate in a centrifuge tube is washed and then dried for 12 h, and the starch microspheres with the average particle sizes smaller than 10 mu m are obtained. The prepared starch microspheres have the characteristic of being small in particle size, the phenomenon that starch microspheres aggregate due to the fact that the interfacial area between the two phases of the aqueous two-phase emulsion is substantially increased, the interfacial free energy is substantially increased and liquid drops aggregate to reduce the interfacial free energy in the preparation process of the starch microspheres can be avoided, and the preparation method has great application value.

The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to a nano-foam oil-displacing agent and a preparation method thereof. The oil-displacing agent comprises the following components in percentage by weight: 10-45% of an anionic surfactant, 7-15% of a zwitterionic surfactant, 6-12% of oily nanoparticles, 5-10% of a stabilizer, 1-2% of a dispersingagent and the balance of water. The preparation method of the oil-displacing agent comprises the following steps: preparing oily nanoparticles from solid paraffin and isocaprylic acid, dispersing theoily nanoparticles in water, conducting uniform mixing with a surfactant, and adding a stabilizer and water to prepare the nano-foam oil-displacing agent. The nano-foam oil-displacing agent can effectively inhibit gas diffusion, enhance the mechanical stability and viscosity of a liquid film, effectively prevent external heat from being transferred to the inside, reduce the molecular thermal motion rate, greatly reduce the liquid separation rate of a foam liquid film, enhance the stability of foam and further improve the oil-displacing efficiency.

The invention discloses a preparation technology of a painting mist coagulant. The technology comprises the following steps of (1) preparation of an adhesive elimination agent, and preparation includes the hydroxymethylation stage and the condensation stage, wherein at the hydroxymethylation stage, deionized water is added to a 500-mL beaker, then melamine and formaldehyde are added in sequence, the pH value is adjusted to 8-9 with triethylamine, and a stirring reaction is conducted for 30-60 min at 60-80 DEG C; at the condensation stage, the pH value of the solution is adjusted to 3-5 with 50% sulfuric acid, a stirring reaction is conducted for 1-3 h at 60-80 DEG C, and transparent liquid, namely the adhesive elimination agent is prepared; (2) preparation of the painting mist coagulant, wherein 300 mL of water is added to the 500-mL beaker, cationic polyacrylamide is added under high-speed stirring, after stirring and dissolution are conducted for certain time, a modification agent and the adhesive elimination agent are added, stirring continues for 0.5 h, and a sticky transparent solution, namely the painting mist coagulant is obtained. According to the preparation technology ofthe painting mist coagulant, through the cooperation effect of all the components, the flocculation performance and paint residue separation effect of the painting mist coagulant are obviously improved, and the aim of removing over-sprayed oil paint in oil paint wastewater is achieved.

The invention relates to a polylactic acid composition containing a carboxylate nucleating agent and a preparation method thereof, and belongs to the technical field of polylactic acid processing, the raw materials comprise the carboxylate nucleating agent, an antioxidant, an anti-hydrolysis agent and L-polylactic acid, and the polylactic acid composition is prepared by mixing the raw materials through a high-speed mixer and carrying out twin-screw extrusion granulation. In the preparation process, by using anhydride substances and potassium hydroxide as raw materials and reacting in an aprotic solvent, the anhydride substances are synthesized into a carboxylate nucleating agent containing four carboxylate groups, the carboxylate nucleating agent is uniformly dispersed in a polylactic acid melt in the form of extremely tiny solid particles to serve as heterogeneous crystal nucleuses, the interface free energy required by polylactic acid nucleation crystallization is reduced, so that polylactic acid chain segments are promoted to crystallize simultaneously by taking the crystal nucleus as the center, and the aim of improving the crystallization rate and crystallinity of polylactic acid is fulfilled.

The invention discloses a special automobile exterior trim part material added with a waste mask melt-blown material. The special automobile exterior trim part material is prepared from the followingraw materials in parts by weight: 80-100 parts of PC resin, 50-60 parts of waste mask reclaimed material, 10-20 parts of flame-retardant filler, 10-15 parts of modified montmorillonite, 5-10 parts ofbasalt fiber, 1-5 parts of flexibilizer, 1-3 parts of light stabilizer and 1-3 parts of coupling agent. The flame-retardant filler is added to endow the composite material with excellent flame retardancy and heat resistance, the modified montmorillonite and the flexibilizer endow the composite material with excellent toughness and impact resistance in inorganic and organic aspects, and the titanium dioxide can scatter and absorb ultraviolet rays, thereby enhancing the aging resistance of the composite material. The melt-blown material in waste masks is utilized to implement secondary high-efficiency utilization of the waste and reduce pollution, so that the special material for the automobile exterior trim part has the characteristics of impact resistance, high-temperature resistance, flame retardancy, low cost, environment friendliness, health and the like.

The invention discloses a preparation method of a silibinin nano-cage type nanocrystalline injection and belongs to the technical field of medicines. The nano-cage type nanocrystalline injection is prepared from ingredients as follows: an active ingredient, namely, silibinin, a nano-cage type nanocrystalline drug release system and an organic solvent used for dissolving the active ingredient, namely, silibinin, wherein the nano-cage type nanocrystalline drug release system is formed by PEG-PCL (polyethylene glycol-polycaprolactone) and PEG-CS (polyethylene glycol-chitosan). The prepared silibinin nano-cage type nanocrystalline injection has good physical stability, the blood circulation time of the drug can be prolonged after drug administration, the relative bioavailability is improved, the average retention time in vivo is prolonged, and the silibinin nano-cage type nanocrystalline injection has long cyclicity and passive targeting property.