4 results about "Tannin" patented technology

The invention discloses a hydrophobic polymer film composite coating hydrophiling modification method which comprises the following steps: preparing a tannin solution with a certain concentration, adding a certain amount of silane coupling agent alcohol solution, stirring uniformly, and regulating the pH value of the mixed solution to alkalinity; sequentially soaking the polymer film in isopropanol, deionized water and the tannin-silane coupling agent solution; and after finishing the modification, taking out the film, flushing with deionized water many times, and storing in deionized water or in a dry environment at room temperature, thereby obtaining the hydrophiling-modified high-polymer film sample. The method greatly enhances the hydrophilicity and stability of the hydrophobic polymer film, has the advantages of simple modification technique and low cost, and has wide application range.

The invention provides a treatment method of chemical copper plating waste liquid. The method comprises the following steps: (1) mixing persimmon tannin and copper plating waste liquid to form a solution, and performing stirring reaction at the room temperature; (2) adding a water solution containing 25% of glutaraldehyde to the solution, adjusting the pH value, and then performing stirring reaction at the room temperature; (3) adjusting the pH value of the solution to make the persimmon tannin settled, filtered and dried, so as to obtain a solid; (4) carbonizing the obtained solid at high temperature, so as to obtain CuO. The treatment method of the chemical copper plating waste liquid has the following advantages that 1, the chemical copper plating waste liquid is treated by using the persimmon tannin, thereby realizing environmental protection and no pollution; 2, the cost is low, the operation is convenient, and the application effect is good; 3, Cu can be effectively recycled to make waste profitable. Therefore, compared with the prior art, the treatment method of the chemical copper plating waste liquid has a better treatment effect, improves the production rate, reduces the cost, and has a wide application prospect in the field of treatment of chemical plating waste liquid.

The invention discloses an anti-stress agent for relieving fasting stress before fowl slaughtering, and a preparation method thereof. The anti-stress agent is prepared from the components in percentage by weight: 30 to 50 percent of glucose, 5 to 15 percent of guanidinoacetic acid glycine, 5 to 15 percent of glutamine, 5 to 10 percent of theanine, 5 to 10 percent of glycine betaine, 5 to 10 percent of L-ascorbic acid, 1 to 5 percent of tannin, 1 to 5 percent of potassium citrate, 1 to 5 percent of sodium propionate, 1 to 4 percent of sodium diacetate, 1 to 5 percent of lactic acid, 0.5 to 2 percent of dipotassium phosphate, and 0.5 to 2 percent of sodium bicarbonate. 0.01 to 3 percent by weight of anti-stress agent is added into drinking water for fasting fowl before slaughtering. After the fowl drinks the anti-stress agent, the moisture content of chicken can be remarkably improved, the comprehensive stress reaction before slaughtering is reduced, the weight loss is reduced, and the economic loss is reduced.

The invention relates to a method for manufacturing a foundry body including the preparation of a granular mixture including a polycondensed resin having modified formaldehyde, optionally incorporating an aromatic or polyaromatic during the synthesis thereof, a hardening agent, a formaldehyde sensor compound, water and optionally at least one resin selected from the group comprising tannins, natural polyphenols, and lignins, placing said granular mixture in contact with the surface of a forming tool, and insufflating a flow of gas at 50° C. to 380° C. into the granular mixture for 1 to 300 seconds, in order to ensure at least partial hardening of said mixture. The invention also relates to a method for manufacturing a molded foundry piece made of metal or a metal alloy, which includes pouring metal into at least one body (mold and/or core) thus produced; and to a foundry piece thus manufactured.