4 results about "Conjugated polyelectrolyte" patented technology

The invention discloses a water-soluble fluorescent conjugated polyelectrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out Suzuki coupling reaction or Sonogashira coupling reaction polymerization on the synthesized 3, 6-diborate carbazole or 3, 6-diethynyl carbazole monomer, and then carrying out quaternization reaction to obtain the conjugated polyelectrolyte. The 3, 6-substituted carbazole is introduced into a polymer main chain to form a non-rigid structure, so that the solubility of the polymer in a solvent is improved, and the blue fluorescence quantum yield is increased; meanwhile, the trimethylamine quaternary ammonium salt side group not only enhances the water solubility, but also is used as a molecular recognition site to be combined with negative charges of heparin through electrostatic interaction; a fluorescent sensing system is formed after the conjugated polyelectrolyte is dissolved in a buffer solution, and the fluorescence intensity of the fluorescent sensing system is remarkably quenched and responded along with increase of the heparin concentration. The heparin quantification range can be flexibly adjusted by adjusting the concentration of the conjugated polyelectrolyte; the method is suitable for detection of common heparin and low-molecular-weight heparin and analysis of heparin in complex samples.

The invention discloses a conductive silver adhesive composition for an HJT battery and a preparation method of the conductive silver adhesive composition, the composition comprises the following raw materials in parts by weight: 50-60 parts of silver powder, 20-25 parts of a modified additive, 3-6 parts of modified epoxy resin, 0.5-1 part of a curing agent and 8-15 parts of ethylene glycol monoethyl ether acetate, and the side chain of the functional epoxy resin is connected with a conjugated polyelectrolyte structure. The conjugated polyelectrolyte structure has excellent charge transfer performance, the conductive effect of the conductive silver adhesive is improved, needle-shaped carbon nanotubes are arranged on the surface of the modified additive, then a structure similar to a xanthium sibiricum shape is formed, and the needle-shaped carbon nanotubes on the surface can increase the contact area with silver powder and cooperate with functional epoxy resin, so that the conductivity of the conductive silver adhesive is improved. The conductive effect of the conductive silver adhesive can be further improved, the addition amount of the silver powder is reduced, the resource utilization rate is improved, the thermal stress of the battery during temperature change is reduced, the stability of the HJT battery is improved, and the service life of the HJT battery is prolonged.

This application relates to the field of nanophotocatalytic materials technology, and discloses a conjugated polyelectrolyte / mesoporous nano-titanium dioxide composite photocatalyst, its preparation method, and its application. The preparation method includes: dissolving Pluronic F127 in tetrahydrofuran to obtain a homogeneous solution; adding glacial acetic acid and hydrochloric acid to the solution and stirring until homogeneous to obtain a precursor solution; rapidly adding tetrabutyl titanate to the precursor solution and stirring until homogeneous; then removing the solvent and crystallizing in situ; collecting the solid phase and calcining it to obtain mesoporous titanium dioxide; dispersing the conjugated polyelectrolyte (CPEs) in a solvent, then adding the mesoporous titanium dioxide for self-assembly, removing the solvent, and obtaining the composite photocatalyst. The composite photocatalyst prepared in this application exhibits a wider visible light response range and superior photocatalytic water splitting for hydrogen production. It can fully utilize the photosensitization and charge transport advantages of CPEs under extremely low loading conditions, achieving excellent photocatalytic hydrogen production performance without the need for noble metal co-catalysts.

The invention relates to the technical field of carbon nanotubes, in particular to an enrichment method of a single-chiral single-walled carbon nanotube based on conjugated polyelectrolyte. The enrichment method of the single-chiral single-walled carbon nanotubes based on the conjugated polyelectrolyte is low in cost, efficient and high in purity, the conjugated polyelectrolyte on the surface is convenient to remove, and mass enrichment of the single-chiral single-walled carbon nanotubes not coated with a dispersing agent is truly achieved.