7results about How to "Solve easy loss" patented technology

The invention relates to absorbent paper as well as a preparation method and application thereof. The method comprises the following steps: pulping plant fiber pulp, adding sodium bicarbonate for pretreatment, and washing to obtain pretreated paper pulp; adding a dispersing agent, a wet strength agent and a composite antibacterial component into the pretreated paper pulp, and uniformly mixing to obtain mixed paper pulp; the composite antibacterial component is prepared from chitosan, polylysine and a modified copper oxide dispersion liquid; feeding the mixed paper pulp into a rotary screen paper machine to produce upper-layer single-layer wrinkling base paper, then compounding the upper-layer single-layer wrinkling base paper with lower-layer single-layer semi-forming base paper on which the macromolecular water-absorbent resin particles are scattered, and then drying to obtain the water-absorbent paper. The antibacterial rate of the absorbent paper on various pathogenic bacteria is larger than or equal to 99.5%, the antibacterial rate is still larger than or equal to 97% after 20 times of water washing, and the absorbent paper is high in water absorption speed, stable in physical performance, safe, environmentally friendly, controllable in cost, capable of being widely applied to the fields of hygienic products, medical dressings, food packaging and the like, simple in preparation process and suitable for industrial production.

This invention discloses a mild and stable temperature-responsive microemulsion composition, its preparation method, and its applications, belonging to the fields of cosmetics and pharmaceutical technology. This invention uses a nonionic decyl glucoside and anionic sodium lauroyl glutamate, introducing tocopherol polyethylene glycol succinate and disodium EDTA, forming a dual stabilizing mechanism of "antioxidant + metal ion chelation," effectively protecting unstable active ingredients such as glycyrrhizin. Experiments show that in an accelerated test at 60℃, the retention rate of glycyrrhizin increased by more than 20%. The microemulsion composition prepared by this invention exhibits high stability, low irritation, and skin-targeted sustained-release properties.

The application discloses a super-hydrophobic polypropylene plastic composite material and a preparation method thereof, and relates to the technical field of high-performance polypropylene. The method comprises the following steps: dispersing and embedding hydrophobic modified nano silicon dioxide in a low-molecular-weight polymer wax matrix to prepare composite microspheres; grafting polydimethylsiloxane to polypropylene molecular chains to prepare polydimethylsiloxane grafted modified low-surface-energy master batches; performing surface hydrophobic modification treatment on natural tubular silicate minerals to prepare hydrophobic modified nanotubes; and melt blending polypropylene matrix resin, the composite microspheres, the low-surface-energy master batches, the hydrophobic modified nanotubes and processing aids, and then performing cooling solidification and molding to obtain the super-hydrophobic polypropylene composite material. The polypropylene plastic composite material prepared by the application has excellent super-hydrophobic performance.

The invention relates to the technical field of polypeptide extraction, and discloses a method for extracting crocodile nail peptide with an anti-radiation effect, which comprises the following steps: degreasing and crushing crocodile nails to obtain fine powder, and performing solid-phase kneading on the fine powder and an enzymatic extraction auxiliary composition under an anhydrous condition; adding water, homogenizing, and treating by a high-voltage pulse electric field to obtain a flexible precursor; sequentially adding keratinase and alkaline protease to carry out constant pH relay hydrolysis in a nitrogen-filled micro-positive pressure environment; cooling, adjusting the pH to an isoelectric point, performing coagulation, separating supernate, performing gradient elution through macroporous adsorption resin, and performing vacuum concentration to remove alcohol; finally, the concentrated solution is screened through 3000 Da and 500 Da ultrafiltration membrane bags in sequence, trapped fluid is collected, freeze drying is conducted, and the product is obtained. According to the preparation method disclosed by the invention, the dissolution rate and the purity of the crocodile methyl peptide with the anti-radiation effect are effectively improved by combining solid-phase kneading, a high-voltage electric field with double-enzyme hydrolysis and physical screening, and inactivation and loss of active ingredients are avoided.

This invention provides a polyfluorosiloxane alkyl polyurethane, its preparation method and application, and marine protective coatings, relating to the field of marine engineering protection technology. The polyfluorosiloxane alkyl polyurethane provided by this invention has a molecular chain comprising a soft segment component and a hard segment component. The soft segment component is a polylactic acid-polycarbonate copolymer with dihydroxyl-terminated ends; the hard segment component has polyfluorosiloxane side chains. Using the polyfluorosiloxane alkyl polyurethane provided by this invention, a biomimetic super-lubricating surface marine engineering protective coating with self-healing function and highly stable surface lubricant can be prepared. The chemically bonded polyfluorosiloxane side chain structure endows the coating with longer-lasting corrosion protection performance; the addition of mercapto-modified nano-silica further enhances the mechanical properties and UV aging resistance of the coating; simultaneously, the preparation method of this polyurethane is simple, and the reaction conditions are mild and efficient.

The invention provides light lyocell cotton denim with low fibrillation and antibacterial and anti-mosquito functions and a preparation method of the light lyocell cotton denim, and relates to the technical field of functional finishing of textiles. The preparation method of the light lyocell cotton denim with low fibrillation and antibacterial and anti-mosquito functions comprises the five steps of fabric pretreatment, finishing liquid preparation, double-section padding, third-order curing and after-finishing. Through the synergistic effect of gradient crosslinking and natural antibacterial and anti-mosquito components, the fabric is endowed with lasting antibacterial and anti-mosquito functions while fibrillation of lyocell fibers is effectively inhibited, the technical problem that in a traditional finishing method, it is difficult to consider both fibrillation and functionality at the same time is solved, and the antibacterial and anti-mosquito effects of the fabric are improved. And the prepared fabric has excellent fibrillating resistance, lasting antibacterial and anti-mosquito effects and good softness and comfort.

The invention provides a preparation method of a modified ferruginous mineral loaded amphoteric polymer heavy metal adsorbent, which comprises the following steps: I, pretreating a mineral matrix, namely crushing, grinding and sieving ferruginous raw ore to obtain mineral powder, grinding and sieving biochar to obtain biochar powder, and calcining and activating the mineral powder and the biochar powder in a muffle furnace to obtain a modified ferruginous mineral loaded amphoteric polymer heavy metal adsorbent; naturally cooling to obtain a calcined modified mineral matrix; iI, preparing a precursor dispersion liquid, namely adding the calcined modified mineral matrix into an organic solvent, performing ultrasonic dispersion at room temperature for 20-40 minutes to obtain a uniform mineral dispersion liquid, sequentially adding an amino monomer, an acrylic monomer, a cross-linking agent and an initiator into the dispersion liquid, and uniformly stirring and mixing to obtain a polymerized precursor liquid; iII, in-situ polymerization reaction: continuously introducing nitrogen into the polymerization precursor liquid to remove air in the system, sealing, and carrying out in-situ free radical polymerization reaction in a constant-temperature environment to obtain a solid-phase product; and IV, post-treatment: sequentially washing the solid-phase product with methanol and deionized water for multiple times to remove unreacted monomer and oligomer impurities, and then drying, grinding and sieving to obtain the magnesium iron mineral loaded amphoteric polymer heavy metal adsorbent. The method can be flexibly applied according to actual wastewater pH characteristics, and the defect that a traditional adsorbent can only treat single type of heavy metal or needs to frequently adjust the pH is overcome.