32results about How to "Good spatial stability" patented technology

The invention discloses a thermosetting plastic. The thermosetting plastic is characterized by comprising the following components in parts by weight: 60-95 parts of thermosetting resin, 5-40 parts of low-shrink additive, 150-300 parts of an inorganic mineral filler, 2-4 parts of an initiator, 0.6-1 part of calcium hydroxide micro powder, 2-6 parts of zinc stearate micro powder and 30-60 parts of glass fiber. In comparison with a conventional thermosetting plastic, the thermosetting plastic can be solidified more rapidly, high strength can be maintained within a wide temperature range, and the flame-retardant effect is good.

The invention discloses an osteoinductive collagen based composite hydrogel and a preparation method thereof. The preparation method comprises following steps: preparing a leather collagen solution byadopting an acidic buffer solution, fully stirring to promote the dissolution and dispersion, slowly adjusting the pH of the solution to 6.0-8.0 by using an alkali solution, then placing the solutionin a thermostat incubator, carrying out incubation to obtain a leather collagen hydrogel basic material; soaking the leather collagen hydrogel basic material in a chemical modifying agent solution, adding dopamine and an oxidizing agent, fully carrying out reactions to obtain a dopamine modified leather collagen hydrogel basic material; adding nano fish bones, adjusting the temperature and pH, after reactions, fully washing the reaction product by ultrapure water, and then sterilizing the reaction product by irradiation to obtain the osteoinductive collagen based composite hydrogel. The hydrogel has the advantage that the compatibility of interface between granular bones in the prepared hydrogel and organic phase hydrogel is greatly improved, thus the prepared hydrogel has an excellent osteoinductive property, and the additional value of leather collagen and fish bones is increased.

The invention discloses a preparation method of a POSS-modified CdTe quantum dot-sensitized solar cell. The method comprises the steps of carrying out reflux condensation by adopting a water phase method to prepare CdTe quantum dot powder; and then modifying POSS to the surfaces of CdTe quantum dots and assembling POSS-modified CdTe quantum dots into the quantum dot-sensitized solar cell as a photosensitizer. The method is a simple and feasible preparation method of the OA-POSS-modified CdTe quantum dot-sensitized solar cell. The problems of poor quantum dot stability and severe combination of electron holes between a photo-anode and a quantum dot interface are solved. OA-POSS is modified on the surfaces of the CdTe quantum dots, so that the photoelectric characteristics of the CdTe quantum dots can be changed, the quantum dots can be effectively passivated, the defects of the surfaces of the quantum dots are reduced, the stability of the quantum dots is improved and electrons are more effectively injected into TiO2, thereby improving the photoelectric conversion efficiency and the stability of the quantum dot-sensitized solar cell.

The invention relates to a fudosteine oral liquid and a preparation method thereof. The fudosteine oral liquid comprises fudosteine, a metal ion compound, an acid-base regulator and a solvent, whereinthe fudosteine and metal ions form a chelate through chelation. The preparation method comprises the following steps: (1) mixing the metal ion compound with part of the solvent, and stirring until the metal ion compound is dissolved; (2) mixing the solution obtained in the step (1) with the fudosteine, stirring until the solution is dissolved, and adding the acid-base regulator to regulate the pHvalue of the solution; and (3) carrying out chelation reaction on the solution obtained in the step (2), cooling, and adding the solvent to the target quantity, thereby obtaining the fudosteine oralliquid. The oral liquid has the advantages of favorable stability and lower isomer impurity content, and solves the problem that the isomer impurity content in the fudosteine oral liquid increases quickly as the time goes on in the prior art.

The invention belongs to the field of optical fiber sensing technology and discloses an in-fiber detection system for biological molecules based on a pohotonic crystal fiber. The system comprises a light source unit, a sensing unit, a fluid filling unit, an optical detection unit, an optical fiber link and a filling link, wherein light output by a broadband optical source is transmitted to a conical optical fiber through an input optical fiber and an optical fiber circulator. Because the pohotonic crystal fiber is vertically contacted with a conical area of the conical optical fiber, light in the conical area is coupled to enter the pohotonic crystal fiber in a near field coupling manner; light meeting phase matching conditions is limited in the pohotonic crystal fiber to be transmitted; the wavelength corresponding to the light meeting the phase matching conditions is called a resonant wavelength; and light which does not meet the phase matching conditions is re-coupled to enter the conical optical fiber, is reflected into the optical fiber circulator, and then is transmitted to a spectrum analyzer through the output optical fiber so as to serve as a measuring signal. The detection system disclosed by the invention is simple in structure, flexible in design, easy to realize, small in size and high in sensitivity and precision and is capable of performing in-fiber detection on the biological molecules.

The invention discloses a stone anti-pollution protective agent and belongs to the technical field of stone protection. The stone anti-pollution protective agent is prepared by the following steps: dropwise adding octenyl succinic anhydride into a chitosan liquid, then dropwise adding a sodium hydroxide solution to adjust pH, heating, stirring and reacting, adjusting pH to obtain a modified chitosan liquid, and carrying out ultrasonic dispersion on an emulsifier and the modified chitosan liquid at the mass ratio of 1: 50-1: 100 so as to obtain a modified nanometer chitosan emulsion; heating meerschaum, aldehyde, water and sodium hydroxide solution and stirring and reacting, and filtering to obtain modified meerschaum; placing rubber powder, the modified nanometer chitosan emulsion, stone flour, a thickening agent, Carbomer, a silane coupling agent, modified meerschaum and water into a feed mixer, and stirring at high rotating speed of 1000-1200 r/min so as to obtain the stone anti-pollution protective agent. the stone anti-pollution protective agent prepared by the technical scheme has excellent waterproofness and resistance to soiling, and acid resistance and alkali resistance ofthe product are also remarkably enhanced.