35results about How to "The preparation process conditions are easy to control" patented technology

The invention relates to injection amphiphilic-microsphere-containing hyaluronic acid mixed gel and a preparation method thereof. The microsphere material relates to amphiphilic materials of PLLA-PEG, PLGA, PLGA-PEG and the like. The molecular weight of PLLA or PLGA is 10,000-500,000, the molecular weight of PEG is 1,000-10,000, and in PLGA, LA/GA=90/10-10/90. The average grain diameter of the microsphere is 1-200 [mu[m, and the mass percent of the microsphere in the gel is 1-50%; the gel is made from hyaluronic acid, divinyl sulphone crosslinked hyaluronic acid, or glycidyl ether crosslinked hyaluronic acid, the molecular weight of the hyaluronic acid is 100,000-3,000,000, and the mass percent of the hyaluronic acid is 1-50%. The gel can be also made from animal-derived collagen, chitosan, amino acid cellulose and sodium alginate. The microsphere mixed gel is prepared in a sodium chloride solution or a phosphate buffered solution with the osmotic pressure of 250-350 mOsm/L and pH of 6.5-7.5. According to the invention, the amphiphilic microsphere is directly mixed with hyaluronic acid gel, can be uniformly distributed in the gel easily, and is unlikely to aggregate into blocks in the water environment of a human body after being injected.

The invention relates to a preparation method for a modified camellia oil fatting agent for leather processing. The method comprises the following steps that a, 850-900 parts by mass of camellia oil, 74-148 parts by mass of n-butyl alcohol and 3-7 parts by mass of catalyzers are taken and added into a reactor; and b, reaction is carried out for 2-3 h at 100-120 DEG C, the hydroxyl value in a reaction system is measured, and by the total amount of reactants, when the hydroxyl value is greater than or equal to 65 mg KOH/g, butyl alcohol which is not fully reacted is removed through reduced pressure distillation.

An alpha-calcium phosphate as the basic material of bone-repairing biologic material is prepared from calcium phosphate and calcium carbonate through proportional mixing, adding compound mineralizingagent, wet grinding, drying, sieving, high-temp calcining, and naturally cooling. Said mineralizing agent is the fluoric alkali-earth metal salts or alkali metal salts (potassium fluoride or calcium fluoride). Its advantages include high purity and better biologic compatibility and mechanical performance.

The invention discloses a clarifying agent for fruit wine and a preparation method of the clarifying agent. The clarifying agent for the fruit wine is prepared from the following components: 0.01 g to0.05 g of graphene oxide, 0.4 g to 0.6 g of chitosan, 0.4 g to 0.6 g of sodium alginate, 0.3 mL to 0.6 mL of an acetic acid solution, 0.5 mL to 1.0 mL of glutaraldehyde and 50 mL of ultrapure water which is used as a solvent. The composite structure formed by using the chitosan, the graphene oxide and the sodium alginate has a better adsorption effect on substances which easily generate compositeprecipitates in the fruit wine, so that a wine body has a high clarifying degree and gloss; the clarifying agent effectively adsorbs substances such as protein and metal ions in the fruit wine, has agood clarification effect, and avoid turbidity; and meanwhile, the clarifying agent can effectively improve stability of the fruit wine, so that the fruit wine cannot be turbid during long-time storage, and the shelf life of the fruit wine is prolonged.

The invention provides an aluminum member surface microetching method, an aluminum member complex and a preparation method thereof. The aluminum member surface microetching method comprises the following steps: performing pretreatment of oil removing, neutralizing treatment and alkali corrosion treatment in order on an aluminum member, microetching on the pre-treated surface of the aluminum member, forming micropore on the surface of the aluminum member; performing micropore washing treatment and pore enlarging treatment on the micropore formed on the surface of the aluminum member. The aluminum member complex comprises the aluminium member and a bonding member combined with the aluminum member, the aluminum member is processed by an aluminum member surface microetching method, the surface etched with the micropore is coated by a binder, and the aluminum member is bound with a plastic member or a resin piece. The aluminum member surface microetching method can generate various micropores on the surface of the aluminum member, and can effectively enhance the bonding strength between the aluminum member and other materials or the members such as resin or plastics.

The invention relates to the technical field of preparation of asphalt mixtures, and particularly discloses an environment-friendly asphalt mixture and a preparation method thereof. The environment-friendly asphalt mixture is prepared from the following components in parts by weight: 2000 to 2500 parts of fine aggregate, 2000 to 2500 parts of coarse aggregate, 150 to 200 parts of mineral powder, 250 to 300 parts of asphalt, 50 to 80 parts of resin powder, 50 to 100 parts of an emulsifier, 0.6 to 1.2 parts of an anti-stripping agent, and 2000 to 2500 parts of modified recycled aggregate, wherein the modified recycled aggregate is prepared from waste concrete blocks through crushing, acid pickling, alkalization, modification, calcination and other procedures. According to the environment-friendly asphalt mixture disclosed by the invention, the waste concrete blocks are recycled, and multiple modification procedures are matched for treatment, so the environment-friendly asphalt mixture has the advantages of environmental protection, energy conservation, and high Marshall stability and immersion residue stability at the same time.

The invention discloses a flame-retardant polyolefin composite material as well as a preparation method and application thereof. The flame-retardant polyolefin composite material comprises the following formula components: 20-50% of ethylene vinyl acetate, 10-30% of low-density polyethylene, 6-25% of polyethylene elastomer, 10-40% of a composite flame retardant, 0.2-1% of an antioxidant, 0.5-1.5% of a lubricant and 0.1-4% of a cross-linking agent, wherein the composite flame retardant comprises a mixture of magnesium hydroxide, calcium carbonate and frit. A resin matrix of the flame-retardant polyolefin composite material can form a three-dimensional network connection structure, and the flame-retardant polyolefin composite material is endowed with excellent impact resistance, elasticity, tear resistance and other mechanical properties and high temperature resistance. The composite flame retardant containing the mixture of the magnesium hydroxide, calcium carbonate and frit endows the polyolefin composite material with excellent flame retardant property, does not generate toxic components during combustion, and is safe and environment-friendly.

The invention provides a preparation method of a hybrid porous polymer based on cage and ladder type structure silsesquioxane. The method includes the steps of: dissolving cage structure octavinyl silsesquioxane (OVS) and dodecaphenyl substituted tricyclic trapezoid silsesquioxane (PLS) in an organic solvent, adding a catalyst, stirring the substances uniformly, and carrying out heating reaction;at the end of the reaction, performing cooling to room temperature, filtering and washing to obtain a solid I; subjecting the obtained solid I to soxhlet extraction, and then performing vacuum drying.The preparation steps adopted by the invention are simple, the preparation process conditions are easy to control, and the used raw materials are easily available; the obtained hybrid porous polymerhas high specific surface area, large pore volume, and good chemical stability and thermal stability, and has good adsorption capacity when applied to adsorption of dyes and heavy metal ions.