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

The invention relates to a macromolecular anionic-nonionic emulsifier and a preparation method thereof. The emulsifier is prepared from 15-20% of a vinyl monomer, 5-8% of a hydroxyl reactive monomer, 8-10% of a nonionic reactive monomer, 18-22% of an organic acid reactive monomer, 4-5% of an initiator, 20-25% of a neutralizer and the balance of a solvent. According to the scheme, the hydroxyl reactive monomer can endow the emulsifier with high emulsifying capacity and good dispersity and wettability, a polymer with the characteristics of a nonionic emulsifier is prepared by jointly using the hydroxyl reactive monomer and the nonionic monomer, and a small particle size can be obtained when the polymer is used for preparing an emulsion; the macromolecular polymer prepared by the method has the characteristics of both nonionic and anionic emulsifiers, has larger molecular weight, improves the water resistance of a paint film, and has the characteristics of fine particle size and high emulsibility; and the emulsifier is relatively high in stability, does not flocculate, is high in emulsion tolerance and has an extremely good emulsifying effect.

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 relates to a polyacrylamide-based microsphere deep control and displacement agent and a preparation method thereof, which mainly solves the problem that the use of polymer microspheres in the prior art for medium and high permeability oil reservoirs has poor profile control, plugging and oil displacement effects and cannot be achieved. Deep profile control, increasing the use concentration of polymer microspheres and increasing the cost problem, by using polyacrylamide microsphere deep control and driving agent, in parts by weight, including the following components: 0.05 to 0.5 parts of polymer Microsphere emulsion, 0.1-1 part of surfactant for oil displacement, 0-99.85 parts of water; wherein, the polymer microsphere has a core-shell structure, and the core is a cross-linked polymer gel containing ionic monomer structural units. Glue microspheres, the shell is a technical solution of cross-linked polymer gel containing ionic monomer structural units with different or the same electrical properties as the ionic monomer structural units in the core, which solves this problem well and can be used for medium and high Field application of enhanced oil recovery such as deep profile control, water shutoff, and oil displacement in seepage reservoirs.