6results about How to "Cross-linked stabilization" patented technology

The invention discloses a double-sterilization-anti-sticking composite cross-linked coating as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials. The coating comprises the following raw materials in parts by weight: 5-30 parts of a cross-linkable release type multifunctional branched polymer and 30-95 parts of a cross-linkable functional polymer. According to the double-sterilization-anti-adhesion composite cross-linked coating, the advantages of contact sterilization, antibacterial factor release and adhesion resistance can be combined together, on one hand, the super-hydrophilic component can effectively prevent initial adhesion of bacteria and protein, and even if a small amount of bacteria fall into the surface of the coating, the contact sterilization component can effectively kill a small amount of adhesion bacteria; the formation of bacteria and biological membranes is avoided; in addition, the introduction of releasable antibacterial molecules can effectively enhance the antibacterial effect, and the purpose of deeply killing pathogens is achieved.

The invention provides a secondary battery electrolyte additive and a preparation method thereof. The additive is obtained by bonding oxygen atoms of four hydroxyl groups on R1-R5 groups in a compound as shown in a structural formula I with a group A and a group B through any one of the following modes: (1) bonding with two groups A; (2) bonding with two B groups; (3) bonding with one A group and one B group: # imgabs0 # wherein n is 0 or 1; r1 to R5 are independently selected from H, alkoxy of C1 to C5, hydroxyl and alkyl of C1 to C5 substituted by hydroxyl, and at least four hydroxyl are contained in R1 to R5; * represents a bonding position. The additive can form a stable, cross-linked and tough SEI film, and battery impedance is further reduced. The additive is cheap and easily available in preparation raw materials, low in cost, short in reaction route, simple in purification process, high in production efficiency and wide in application prospect in the secondary battery electrolyte.

The present application relates to the technical field of high polymer material flame-retardant modification, and particularly relates to a COF hierarchical modification APP-based core-shell flame-retardant smoke suppressant, a preparation method and application thereof. The flame-retardant smoke suppressant takes APP as a flame-retardant core layer; takes PVP as a soft template agent, and assists in situ growth of melamine-p-phenylenedimethylene formaldehyde (COF) on the surface of APP to adsorb combustible volatile components in the initial pyrolysis stage, provide a gas source, and act as a Fe 3+ coordination skeleton; takes tannic acid as a coordination agent and a carbon source, and constructs a multi-level core-shell structure with Fe 3+ coordination. The present application realizes integration of flame-retardant and smoke suppression functions through hierarchical modification. When the flame-retardant agent is applied to polyurethane, it can significantly reduce the heat release rate, smoke release rate and toxic gas generation amount, and simultaneously improve the compatibility with the matrix, effectively overcoming the defects of poor compatibility and insufficient flame-retardant and smoke suppression performance of traditional APP flame-retardant agents. The present application has simple preparation process and controllable conditions, and is suitable for industrial production.

This invention discloses a method for preparing a copolymer ultrafiltration membrane with a bonded structure. This method combines in-situ suspension polymerization, click reaction, sol-gel method, and solvent-inducible phase separation to prepare the copolymer ultrafiltration membrane. Excellent hydrophilicity and component stability of the ultrafiltration membrane are achieved through stable covalent bonding between tannic acid and the copolymer. This invention also combines in-situ click reaction and sol-gel reaction to stably introduce high-performance resveratrol into the polymer membrane. Stable bonding of the components is achieved through co-hydrolysis and condensation of the copolymer and the siloxane on the modified resveratrol during the film formation process. The polymerization process of this invention is simple and the structure is tunable. The prepared copolymer ultrafiltration membrane not only has excellent hydrophilicity and antifouling ability but also a stable structure.

The invention provides a crosslinked polyethylene composition without pits on a rotational molding surface and a preparation method of the crosslinked polyethylene composition, and belongs to the technical field of high polymer materials. The crosslinked polyethylene composition without pits on the rotational molding surface is prepared from the following components in parts by weight: 100 parts of polyethylene resin, 0.1 to 2 parts of high-temperature organic peroxide, 0.5 to 3 parts of crosslinking aid, 0.05 to 0.5 part of nitroso ether and 0.1 to 1 part of antioxidant. The nitroso ether compound is introduced, high-activity nitroxide free radicals generated by the nitroso ether compound at a high temperature are used for quenching primary free radicals generated by decomposition of peroxide, generation of low-boiling-point byproducts is inhibited, and a rolling part product without pits in the surface of a rolling part can be obtained under the rotational molding condition of high temperature or rapid temperature rise.

The present invention provides a hydrogel and a preparation method and application thereof. The hydrogel is a hydrogel based on cross-linking of alginate and gelatin molecules, and has good biocompatibility; after further modifying alginate by maleimidation, the cross-linking of alginate and gelatin molecules can be made tighter and more stable, thereby further effectively improving the mechanical properties of the hydrogel under the premise of ensuring the biocompatibility of the hydrogel, so that the hydrogel of the present invention has both excellent biocompatibility and mechanical properties. The hydrogel has good application effects in wound dressings and coatings of implantable medical devices, and the preparation method of the hydrogel has simple operation procedures, high repeatability, and is easy to realize industrialization, so that the hydrogel has strong practicality and is conducive to the large-scale application of the hydrogel.