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Coated controlled release fertilizer of degradable film prepared by reclaiming thermoplastic resin

ActiveCN1603288ATo achieve the purpose of precise controlled releaseFast agingFertiliser formsFertilizer mixturesPolystyrenePolymer chemistry
This invention relates to an envelope control release fertilizer and its production method that using heating fluidized-bed envelope technology. Exhausted thermoplastic resins are used and many filling materials are added, it is used in quick mass industrialized production. Polystyrene cellular resin and polyethylene pellicle resin are mixed as certain proportion set before, and certain proportion flour, corn powder and rubber powder are mixed and dissolved in mixed liquor perchlorethylene and dichloromethane. The liquor is uniformly sprayed to the pre-heated composite fertilizer, carbamide, lemery salt and other fertilizer particles through twin fluid atomization nozzle in heating fluidized-bed in order to form macromolecule polymer envelope that lubricity and densification and with different capabilities of breaking through of water. The liquor is recovered through special made condensation and compaction recovery plant. This production not only has good nutrition control and releasing capability and the nutrition control and releasing term can reach 1 to 12 months, but also the putamina residue in the soil can be degraded in short time, so it belongs to environment good control and releasing fertilizer.
Owner:SHANDONG AGRICULTURAL UNIVERSITY

Antibacterial medical dressing film carrying nano-silver and cellulose nanocrystalline hybrid materials and preparation method thereof

The invention relates to an antibacterial medical dressing film carrying nano-silver and cellulose nanocrystalline hybrid materials and a preparation method thereof. The film comprises biodegradable polymers and the nano-silver and cellulose nanocrystalline hybrid materials with the mass ratio of 3-99 : 1. The preparation method comprises the steps that (1) cellulose raw materials are added to a mixed acid water solution of formic acid and hydrochloric acid, aldehyde group cellulose nanocrystalline is obtained through reaction, the aldehyde group cellulose nanocrystalline is then added to silver salt solutions with the content of 0.01-3 mol/L, and the nano-silver and cellulose nanocrystalline hybrid materials are obtained through reaction; (2) after the hybrid materials and the biodegradable polymers are added to organic solvents, transparent uniform electrostatic spinning solutions are obtained through reaction; (3) electrostatic spinning is carried out on the electrostatic spinning solutions to obtain the antibacterial medical dressing film. The preparation method is simple in preparation technology and suitable for industrial large-scale production, the multifunctional composite film is biodegradable and good in mechanical and thermal property, breathability, antibacterial effect, biocompatibility and cytocompatibility.
Owner:ZHEJIANG SCI-TECH UNIV

Picarbutrazox and sterol-biosynthesis-inhibitor-bactericide composition and preparation thereof and applications of composition and preparation

The invention relates to a composition containing picarbutrazox and a sterol-biosynthesis-inhibitor (SBIs) bactericide and a preparation thereof and applications of the composition and the preparation. The bactericidal composition comprises a bactericidal activity compound I and a bactericidal activity compound II, the bactericidal activity compound I is the picarbutrazox, and the bactericidal activity compound II is the sterol-biosynthesis-inhibitor (SBIs) bactericide. The bactericide composition has the advantages of being wide in control spectrum and free of cross resistance, the using quantity and the using number of the picarbutrazox and the sterol-biosynthesis-inhibitor (SBIs) bactericide can be obviously decreased, and the resistance is delayed. The invention also provides the preparation of the bactericidal composition, a preparation method suitable for the composition is designed, the effect of a medicament can be developed to a maximum degree, and the using quantity of the medicament is decreased. The invention also provides the applications of the bactericidal composition and the preparation, so that medicine is guided to be correctly used, and misusing of the medicament is reduced.
Owner:ZHEJIANG XINNONG CHEM CO LTD
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