5results about How to "Change surface structure" patented technology

The invention relates to the technical field of corrosion inhibitors, and discloses a high-temperature-resistant corrosion inhibitor and a preparation method thereof.The high-temperature-resistant corrosion inhibitor is obtained by adding boric acid modified chitosan, a triazinyl corrosion inhibitor and deionized water into a reactor and stirring. Lone pair electrons provided by a large number of free hydroxyl groups in chitosan in the boric acid modified chitosan can be well adsorbed with metal, so that the metal is prevented from being eroded by a corrosive medium; the boron element forms a protective oxidation film or adsorption film on the metal surface, so that the corrosion process is inhibited; and the ferrocene group in the corrosion inhibitor also has a relatively good corrosion inhibition effect. A quaternary ammonium salt group and a sulfonic acid group in the triazinyl corrosion inhibitor can prevent further corrosion of metal.

The invention discloses a mesoporous material coated carbon fiber, which is prepared by the following method: 1) plasma treatment of carbon fiber electrode; 2) mesoporous material coating; nano silver / carbon film / carbon fiber, wherein the mesoporous material coated carbon fiber is used as a positive electrode, a polypyrrole film is prepared by an electrodeposition method, and carbonization; silver nitrate is added to a 0.1M KNO3 electrolyte to prepare nano silver / nitrogen doped carbon film / carbon fiber; the prepared nano silver / nitrogen doped carbon film / carbon fiber is used as a working electrode, Ag / AgCl is used as a reference electrode, and Pt is used as a counter electrode, a graphene quantum dot water dispersion solution is added to a buffer solution, and graphene quantum dots are deposited on the surface of the material; nano silver / graphene quantum dot / carbon fiber is used as a working electrode, silver nitrate is added to prepare nano silver / carbon film / carbon fiber; the prepared carbon fiber electrode improves the detection range and sensitivity, and reduces the detection lower limit; and can be widely used in electrochemical detection of various substances.

The invention relates to the technical field of corrosion inhibitors, and discloses a high temperature corrosion inhibitor and a preparation method thereof. The invention obtains the high temperature corrosion inhibitor by adding boric acid modified chitosan, a triazine-based corrosion inhibitor and deionized water into a reactor and stirring. The lone pair electrons provided by a large number of free hydroxyl groups in the chitosan in the boric acid modified chitosan can be well adsorbed to the metal, thereby protecting the metal from corrosion by the corrosive medium; the boron element inhibits the corrosion process by forming a protective oxide film or adsorption film on the metal surface; the ferrocene group itself also has a good corrosion inhibition effect. The quaternary ammonium salt group and the sulfonic acid group in the triazine-based corrosion inhibitor can prevent further corrosion of the metal.

The invention discloses a solid-phase microextraction probe and application thereof, a solid-phase microextraction coating of the solid-phase microextraction probe is a Por-COF-F material, and the material is prepared from 1H, 1H, 2H, 2H-perfluorodecanethiol and a porphyrin covalent organic framework through a click reaction. According to the solid-phase microextraction coating disclosed by the invention, a perfluoroalkyl group is introduced into a porphyrin covalent organic framework, so that the coating has a super-hydrophobic surface, and PAEs can be selectively adsorbed through a hydrophobic effect; n, O and F atoms in the coating material can form abundant hydrogen bonds with PAEs for interaction; the aromatic ring structure of the perfluoroalkyl group is changed, and the perfluoroalkyl group and a benzene ring in PAEs can form pi-pi stacking interaction. Due to the interaction, the method shows relatively high selectivity on PAEs, and enrichment of (ultra) trace PAEs in a complex matrix can be realized.

The application belongs to the technical field of animal feed processing, and particularly relates to an Aspergillus niger polysaccharide-lytic monooxygenase and application thereof in promoting rumen degradation of straw. The amino acid sequence of the Aspergillus niger polysaccharide-lytic monooxygenase is shown in SEQ ID NO. 2. The Aspergillus niger polysaccharide-lytic monooxygenase can change the surface structure of the straw, promote the growth of fiber degradation-related classification bacteria in the rumen, and improve the rumen degradation rate of the straw.