42results about How to "The preparation process is simple and economical" patented technology

The invention discloses a method for preparing biomedical titanium and titanium alloy surface antibacterial coatings. The method comprises steps of firstly, processing the surface of a biomedical titanium or titanium alloy sample to be processed, immersing the biomedical titanium or titanium alloy sample in a glycol aqueous solution containing soluble fluoride and performing an anode oxidation treatment; secondly, immersing the biomedical titanium or titanium alloy sample after being subjected to the anode oxidation treatment in a silver nitrate solution, taking out the biomedical titanium or titanium alloy sample, using ultraviolet light radiation to process the biomedical titanium or titanium alloy sample and obtaining the silver-carrying biomedical titanium or titanium alloy sample; and performing a micro-arc oxidation treatment for the silver-carrying biomedical titanium or titanium alloy sample, performing ultrasonic cleaning and vacuum drying and obtaining the antibacterial coatings. The nano precoating layer preparation, the silver-carrying treatment and a micro-arc oxidation technology are combined, then a large amount of silver can be fixed on the biomedical titanium and titanium alloy sample surfaces and can be released slowly for a long time, the antibacterial performance of titanium and titanium alloys is greatly improved, the antibacterial effect can be kept for a long time, and the bacterial infection caused by the fact that a titanium and titanium alloy apparatus is embedded in a human body is greatly reduced or avoided.

A Chinese medicine in the form of injection or orally taken medicines for treating the infection of influenza virus is prepared from the extract of barbat skullcap herb and medicinal auxiliaries. Said extract composed of flavone, alkaloid, steroid and saccharide is prepared from barbat skullcap herb through extracting in water or alcohol, separating and concentrating.

The invention discloses a nano calcium carbonate catalyst wrapped by Ag-loaded titanium dioxide nanoparticles as well as a preparation method and application of the nano calcium carbonate catalyst. The surfaces of spindle-shaped nano calcium carbonate particles are wrapped by Ag-loaded titanium dioxide nanoparticles. The catalyst can be added into paper-making process reconstituted tobaccos so as to be added into cigarettes containing the reconstituted tobaccos, so that the smoke reaction is catalyzed in cigarette igniting and smoking processes and the carbonyl compound content of the smoke can be reduced. According to the invention, the preparation process is simple, convenient and economical, and the prepared catalyst has a remarkable particle catalysis effect, is low in cost and is suitable for industrial application.

The invention belongs to the field of high polymer material sciences, and concretely relates to a preparation method of apolylactic acid fiber composite surface porous film material. The preparation method provided by the invention comprises the steps of dip-coating a fiber into a polylactic acid solution, and air-drying, wherein the mass percent concentration of polylactic acid in the polylacticacid solution is 1 weight percent to 5 weight percent, and the dip-coating time is 50s to 80s. The method provided by the invention is simple and economical in process, convenient and fast to operate,and short in consumed time; the obtained polylactic acid fiber composite surface porous film is a highly ordered and porous material with high stability and large specific surface area, is green without pollution, can be widely applied to the biological medicinessuch as industrial catalysis, biological medicines, fuel cellproton exchange membranes, and high-endisolation techniques as well as thetechnologies such as fuel cellproton exchange membranes, and high-endisolation techniques.

The invention relates to a preparation method of Erchen extract with antitumor activity and its preparation, which belongs to the technical field of traditional Chinese medicine pharmacy. The Erchen Decoction composed of Pinellia, Tangerine Peel, Poria, and Licorice is formulated according to the dosage ratio of ancient Chinese medicine, decocted with water, filtered, concentrated decoction under reduced pressure, adding ethanol to the decoction concentrated solution, dissolving the ethanol precipitate and dialyzing , Concentrate the dialysate under reduced pressure and then dry it in vacuum to obtain Erchen extract with anti-tumor activity. Through the present invention, the extract has a high yield, its polysaccharide content is higher than 75%, and its antitumor activity is better than that of Erchen Decoction. Erchen extract is added to excipients to make Erchen extract preparations with anti-tumor activity. Compared with the traditional water decoction of Erchen Decoction, the preparation made by adding Erchen extracts to excipients is more effective. The anti-tumor effect is good, and it is convenient to take, which increases the compliance of patients and can be widely used. The inventive process is simple and easy to implement, and is suitable for large-scale industrial production.

The invention discloses a preparation method of an active antibacterial composite coating on the surface of titanium and titanium alloy medical instrument. The method includes the following steps: firstly, carrying out ultrasonic washing on the titanium or titanium alloy medical instrument to be treated and then immersing the titanium or titanium alloy medical instrument in NaOH solution for alkali-heat treatment; secondly, carrying out microarc oxidation treatment on the titanium or titanium alloy medical instrument in an electrolyte solution which contains biological active elements and antibacterial ingredients; carrying out hydro-thermal treatment on the titanium or titanium alloy medical instrument, and finally drying under vacuum condition. In such a way, the active antibacterial composite coating can be obtained. In the preparation method, a nano-silver / titanium dioxide composite antibacterial agent is adopted to form the antibacterial coating on the surface of titanium or titanium alloy matrix, and the antibacterial coating has long antibacterial effect to bacteria commonly seen at an operation wound of a person and has adhesion resistance to common inflammatory bacteria. Meanwhile, the active ingredients such as Ca and P in the coating can improve the biological activity and speeds up the osseointegration, and thereby the antibacterial performance, the clinical curing effect and the application range of the titanium and titanium alloy medical instrument are improved by a large margin.

The invention provides a preparation method of a high thermal conductivity composite filling material and a polymer matrix composite material of the high thermal conductivity composite filling material. The high thermal conductivity composite filling material comprises a sheet-shaped heat conductive filling material and a spheroidic heat conductive filling material; and the surface of the spheroidic heat conductive filling material is coated with the sheet-shaped heat conductive filling material. The preparation method comprises following steps: the sheet-shaped heat conductive filling material and the spheroidic heat conductive filling material are subjected to surface modification respectively, and are dispersed in an organic solvent for heating stirring, so that chemical reaction and bond connection among reactive groups from the filling materials are realized, and self assembling is carried out so as to obtain a structure similar to sesame seed balls, wherein the surface of the spheroidic heat conductive filling material is coated with the sheet-shaped heat conductive filling material. The unique structure is capable of realizing formation of high efficiency heat conductive paths in a composite material filled with the high thermal conductivity composite filling material, so that adding of a small amount of the high thermal conductivity two-dimensional sheet-shaped fillingmaterial is capable of improving the thermal conductivity of the polymer matrix composite material obviously, and heat conduction requirements of preparation of electrical and electronic equipment canbe satisfied.

The present invention relates to a compound composition of total stilbenes of tree peony seeds and its extraction method and application. The peony seed skin is extracted with ethanol under reflux, filtered and concentrated to obtain an extract, and then the extract is dissolved and mixed with an adsorbent, and then the mixture is sequentially It is extracted with a solvent, finally refined with acetone and activated carbon, and concentrated until there is no solvent to obtain the total stilbene compound composition. The 6 compounds are paeonol A, paeonol, paeonol C, cis-glucuronin, trans-glucuronin and maimateng H. The total stilbene compound composition of Moutan of the present invention has been proved by pharmacological tests to have good activity against Gram-positive and negative bacteria, and can be used as an antibacterial drug active ingredient alone or in combination with suitable excipients, etc. , as a food additive for food preservation, or for the preparation of antibacterial drugs.