9results about How to "Good pollution effect" patented technology

Provided are a polyisocyanate composition, a resin composition, a cured resin product, a cured resin film, an adhesive resin composition, and a surface protective film, which have good adhesiveness and peelability when made into a surface protective film, and which have improved contamination properties due to an adhesive during peeling. The invention also provides the polyisocyanate composition, the resin composition, the cured resin product, the cured resin film, the adhesive resin composition, and the surface protective film. The present invention is a polyisocyanate derived from at least one di (tri) isocyanate (b1) selected from the group consisting of aliphatic di (tri) isocyanates and alicyclic di (tri) isocyanates, and a di-or higher-functional polyol (b2) having a number average molecular weight of 250-1000 (inclusive), the ratio NCO / OH of the molar amount of isocyanate groups in the di ((III)) isocyanate (b1) to the total molar amount of hydroxyl groups in the polyol (b2) is 2-30, an isocyanurate group is included, the average number of isocyanate functional groups is 5.1-7.0, and the weight-average molecular weight (Mw) is 4000-43000.

The invention relates to a space optical camera focal plane and electric control assembly and an assembly process method thereof, in particular to a space optical camera focal plane and electric control assembly capable of preventing molecular contamination of an electronic assembly to a detector target surface and an assembly process method thereof. The problem that an existing assembly is difficult to meet the detector target surface molecular pollution protection requirement and the space load integration requirement at the same time is solved. The assembly comprises a focal plane assembly and an electric control assembly from front to back. The focal plane assembly comprises a front panel, a focal plane assembly shell which forms a cavity with the front panel, and a detector welding front assembly, a focal plane circuit board and a heat transfer plate which are arranged in the cavity from front to back; the detector welding front assembly comprises a detector base, a detector pressing plate and a detector arranged in an inner hole of the detector base from back to front; the rear end surface of the detector and the step surface of the inner hole of the detector base as well as the front end surface of the detector welding front assembly and the front panel are peripherally sealed; the electric control assembly shell and the focal plane assembly shell define a communicated cavity.

The present invention relates to the technical field of molecular sieves, and in particular to a method for preparing a modified molecular sieve, a modified molecular sieve obtained by the preparation method and its application. The preparation method comprises: (1) exchanging metal ions on a Na-type molecular sieve to obtain a metal ion slurry; (2) adding a first precipitant so that part of the metal ions in the metal ion exchange slurry undergo a first precipitation to obtain a first precipitation slurry; (3) the first precipitation slurry is filtered, subjected to a first ammonium sulfate exchange, a first water wash, and a first roasting in sequence to obtain a cross-baked molecular sieve dry powder; (4) adding a second precipitant so that part of the metal ions in the cross-baked molecular sieve dry powder undergo a second precipitation, and then a second ammonium sulfate exchange, a second water wash, and an optional second roasting are performed in sequence to obtain a modified molecular sieve. The modified molecular sieve obtained by the method has a lower sulfate content and also improves the crystallinity and stability of the modified molecular sieve.

This invention belongs to the field of water softening and sterilization technology, and discloses an ion-selective adsorption electrode, a micro-electric field adsorption system, and their application in water softening and sterilization / algae removal. An ion-selective adsorption electrode comprises polypolycarboxylate ion exchange fibers, activated carbon, a conductive agent, and a binder, wherein the mass percentage of the polypolycarboxylate ion exchange fibers is 5-20%. This invention uses CCEF-modified activated carbon as the cathode, and at the optimal doping level, it effectively removes Ca... 2+ and Mg 2+ The selectivity coefficients were 15.0 and 13.5, respectively, for Ca 2+ The electroadsorption capacity of the electrode is 311 μmol / g, which is much higher than that of the AC electrode. After 50 cycles of stability testing, the Ca... 2+ The electroadsorption capacity remained above 85%, demonstrating good regeneration ability. Activated carbon modified with nano-silver was used as the anode, and under electric field enhancement, the inhibition rates against bacteria and microalgae reached over 99% and 90%, respectively, exhibiting excellent antimicrobial contamination capabilities.

The application discloses a method for preparing an antibacterial nanofiltration membrane by using amikacin as a water-phase monomer, and belongs to the technical field of composite nanofiltration membrane preparation. The method uses amikacin as a water-phase monomer and adopts an interfacial polymerization method to prepare an antibacterial nanofiltration membrane (polyamide nanofiltration membrane). The method has the advantages of simple operation, mild reaction conditions and relatively low raw material cost. In addition, the prepared polyamide composite nanofiltration membrane has higher selective permeation performance and good antibacterial performance. The nanofiltration membrane flux can be as high as 20 L / (m 2 ·h·bar), and the tetracycline rejection rate can be as high as 99.3%. In addition, the application can also provide a reference for the preparation of other antibacterial interfacial polymerization separation membranes.

The invention discloses a PVDF-g-DMC polymer synthesized through an alkali treatment method and preparation of a PVDF / PVDF-g-DMC blended membrane, and belongs to the field of dye pollutant treatment. The invention aims to solve the problems of strong hydrophobicity and easy pollution of the PVDF ultrafiltration membrane. According to the preparation method, hydrophilic DMC is grafted to PVDF through an alkali treatment method, the hydrophobicity of PVDF is improved, and a PVDF-g-DMC polymer is prepared. The PVDF / PVDF-g-DMC blended membrane is prepared by taking PVDF-g-DMC as a modifier, blending the PVDF / g-DMC with a PVDF membrane substrate with a plurality of excellent properties and adopting an immersion precipitation phase inversion (NIPS) method. By adding PVDF-g-DMC, the filtering performance, the hydrophilic performance, the mechanical performance, the corrosion resistance, the pollution resistance and the long-term stability of the PVDF / PVDF-g-DMC blended membrane are comprehensively improved, the dye treatment effect is good, and the PVDF / g-DMC blended membrane is expected to become a novel separation membrane which is excellent in comprehensive performance and can be put into use for a long time.

The present invention addresses the problem of providing a sealing agent for liquid crystal elements, which has excellent low liquid crystal contamination properties when thermally cured at low temperatures, and which is capable of suppressing peeling after curing. The present invention relates to a sealing agent for a liquid crystal element, which contains a curable resin, a thermal polymerization initiator, a photopolymerization initiator, and a thermal curing agent, and wherein the curable resin contains a (meth) acrylic compound and an epoxy compound, the (meth) acrylic compound contains a compound having three or more (meth) acryloyl groups in one molecule, and the epoxy compound contains a compound having three or more (meth) acryloyl groups in one molecule. The thermal polymerization initiator is an azo compound having cyano groups and azo groups, at least one cyano group and at least one azo group are bonded to the same carbon atom, and the carbon atom bonded to the at least one cyano group and the at least one azo group is further bonded to a linear or branched organic group having 3 or more carbon atoms.

The invention discloses a rare-earth-free Y-type molecular sieve for heavy oil catalytic cracking reaction and a preparation method thereof, and belongs to the technical field of catalysts, organic acid and an external silicon source are introduced into a secondary ammonium exchange system, the introduced organic acid can effectively remove non-framework aluminum species generated on the surface of the Y-type molecular sieve in the primary roasting process, and the rare-earth-free Y-type molecular sieve is prepared. An external silicon source can be catalyzed to hydrolyze on the surface of the Y-type molecular sieve to generate an active silicon oxide species; before secondary roasting, the Y-type molecular sieve is soaked in a framework dealumination agent, and in the secondary roasting process, solid acidic oxides contained in the framework dealumination agent can react with framework aluminum species of the Y-type molecular sieve to remove part of the framework aluminum species of the Y-type molecular sieve and generate corresponding framework holes; active silicon oxide on the surface of the Y-type molecular sieve can be timely filled into holes of the framework through solid-phase migration, so that the silicon-aluminum ratio of the framework of the Y-type molecular sieve is remarkably increased, and the Y-type molecular sieve with relatively good catalytic cracking reaction performance can be obtained without introducing rare earth elements.

The present invention discloses a high-sensitivity dual-photoelectrode immunosensor with anti-biomacromolecule pollution performance, and a preparation method and application thereof, belonging to the field of biosensor technology. The present invention uses a high-photocurrent signal-responsive FTO / ZnIn2S4 photoanode and a FTO / CuInS2 / Pt photocathode as signal conversion elements, modifies the capture antibody corresponding to the target antigen on the photocathode, and uses a zwitterionic peptide with a sequence of SKSESKSEPPPPC as an anti-biomacromolecule pollution interface brush to prevent non-specific adsorption of biomacromolecules such as proteins on the electrode surface to generate false positive signals and reduce the specificity and sensitivity of the detection. Through the specific immune reaction between the capture antibody and the target antigen, the specific detection of the target antigen is achieved. The high-photocurrent signal-responsive FTO / ZnIn2S4 photoanode can generate a large photocurrent signal, and the dual-photoelectrode immunosensor can detect the target antigen with high sensitivity.