3results about How to "Method environmentally friendly" patented technology

This invention belongs to the field of precision electronic circuit manufacturing technology, and provides a method and device for repairing broken lines in micro-circuits based on electric field-driven micro / nano 3D printing. This invention employs electric field-driven jet deposition micro / nano 3D printing technology, with the printing nozzle connected to a high-voltage power supply. Utilizing the diameter reduction effect of the Taylor cone in electrostatic dynamics, it achieves the fabrication of micro / nano-scale feature structures. Under the action of electrostatic field tension (changing traditional pressure-driven to tension-driven), high-viscosity materials can be printed with high resolution, enabling the repair of conductive line defects below 1μm. It is particularly suitable for repairing three-dimensional / curved conductive lines and conductive line defects in large-size (meter-scale) substrates. This invention can achieve high-resolution, high-precision, low-cost, and efficient repair of micro-precision conductive line defects.

The application discloses a method for in-situ encapsulating enzyme by lignin. The pH of industrial lignin water dispersion is adjusted to above 10.0 to dissolve the industrial lignin, and the industrial lignin solution is obtained after filtering and removing impurities. Then the pH of the industrial lignin solution is adjusted to 5-9.5, and enzyme protein is added to obtain a mixed solution. The pH of the mixed solution is adjusted to 3.0-4.0 again, so that the industrial lignin and the enzyme protein are co-precipitated. After separating the precipitate, drying is performed to obtain the immobilized enzyme. The application uses the adsorption capacity of lignin to enzyme and the property of alkali-soluble acid-extractable of lignin to immobilize the enzyme with low pH sensitivity, so that the encapsulation rate of the enzyme is improved, and the activity of the immobilized enzyme is better preserved. The application provides a new method for in-situ encapsulating enzyme protein, and has a positive significance for promoting the development of lignocellulose bio-refining and green bio-manufacturing.

This invention is entitled "A Method for Recycling High-Magnetic Lithium Iron Phosphate," belonging to the field of lithium-ion battery cathode material technology. The technical problem to be solved is to provide a method for recycling substandard high-magnetic lithium iron phosphate with a magnetic content of 1-300 ppm. This method is environmentally friendly, simple, and can be mass-produced, and the recycled product meets battery performance requirements. The key technical points include the following steps: (1) First, high-magnetic lithium iron phosphate is ground and reacted with phosphoric acid, then lithium source, iron source, phosphorus source, and additives are added sequentially for mixing, grinding, spray drying, and sintering under an inert atmosphere to obtain a lithium iron phosphate precursor; (2) The lithium iron phosphate precursor, carbon source, and additives are mixed for secondary grinding, spray drying, sintering under an inert atmosphere, and graded crushing to obtain recycled lithium iron phosphate. The recycled lithium iron phosphate has a magnetic content of <1 ppm and exhibits high compaction density and electrochemical performance.