957results about How to "Improve photostability" patented technology

There is provided a composition comprising one or more photoactive compounds and one or more optimization agents. Surprisingly, the composition requires a small amount of optimization agent to efficiently optimize the polarity, critical wavelength, SPF, PFA, Star Rating, photostability, or any combinations thereof, of the composition. Subsequently, an efficient sunscreen composition is achieved.

The invention relates to an oil-based lubricating composite and a preparation method thereof, in particular to a water-based copper and aluminum wiredrawing oil composite and a preparation method thereof. The water-based copper and aluminum wiredrawing oil composite comprises base oil, an emulsifier, an auxiliary emulsifier, a defoaming agent, a rust-proof agent, an antiseptic and an antiwear agent. The preparation method comprises the following steps of: configuring the water-based copper and aluminum wiredrawing oil composite into 3 percent to 45 percent water-based emulsion according to weight percentage; and spraying the water-based emulsion into a wiredrawing die cavity in the copper and aluminum wiredrawing process. The water-based copper and aluminum wiredrawing oil composite has the advantages of excellent lubricating property, great optimal light stability and storage stability, low cost, good cooling effect, fast heat transfer, little temperature increase in the using process, difficult combustion and easy cleaning and ensures the safety of the service environment; and in addition, a copper wire and an aluminum wire drawn by the method have the advantages of uniform wireshape, bright surfaces, difficult corrosion, good ultraviolet and storage stability and good stability.

The invention discloses a compounded botanical synergistic fungicide containing sophocarpidine and osthol. The obtained compounded botanical synergistic fungicide takes sophocarpidine and osthol as main components, and is added with accessory ingredients in a synergistic manner; the morphology of the compounded botanical synergistic fungicide is environment-friendly missible oil, microemulsion, aqueous solution or soluble liquid; and in addition, the compounded botanical synergistic fungicide contains sophocarpidine accounting for 0.1 to 20 percent and osthol accounting for 0.1 to 20 percent, and the rest is the accessory ingredients. The compounded botanical synergistic fungicide is mainly used for controlling downy mildew, gray mold, anthracnose, powdery mildew, cladosporium cucumerinum, soft rot and basal stem rot. The compounded botanical synergistic fungicide does not contain any chemical pesticide component, is easy to degrade in environment, has no consideration of environment pollution and residual hazard, is safe to human, livestock and environment; germs are not easy to be drug-resistant to the compounded botanical synergistic fungicide; the compounded botanical synergistic fungicide is of great value to be applied and popularized on main agricultural and sideline products that earn foreign exchange through exports, such as melons, fruits, vegetables, tea leaves and medicinal materials; and in addition, the compounded botanical synergistic fungicide is an ideal novel pollution-free bactericide.

An injection moulding process for making a completely recyclable, multilayered article which contains:i) a rigid layer formed of a thermoplastic polymer andii) a foamed skin layer formed of a thermoplastic polymer compatible with the material of the rigid layer, byinjection moulding of the rigid layer into a mould composed of two sides,lifting one side of the mould, or change one side of the mould to obtain a small gap of between 3 to 4 mm between the rigid layer and the side of the mould lifted or changed andinjecting the foamed skin layer into the gap formed in step b).

The invention discloses a novel passivated perovskite solar cell and a preparation method thereof. The perovskite solar cell optimizes the absorption of perovskite, so that a perovskite absorption layer contains an anti-solvent tris(pentafluorophenyl)borane to serve as a novel additive. On one hand, the addition of fluoride ions can change the crystallinity and the defect state of a perovskite film to form a high-quality perovskite film with a large grain size; the anti-solvent tris(pentafluorophenyl)borane can enhance the surface appearance of the perovskite and plays a passivation function at the grain boundary; and on the other hand, the fluoride ions can improve the hydrophobicity of the perovskite film and inhibit the phase change of the perovskite to better protect the perovskite from being destroyed by water, thereby further improving the air stability and the light stability of the cell to obtain a high-efficiency perovskite solar cell.

Visible-light response hybrid aerogel and a preparation method and application thereof in waste gas processing are disclosed. Dicyandiamide is taken as a precursor and is calcined in two times to prepare a carbon nitride nanosheet; the carbon nitride nanosheet is dispersed in water, silver metavanadate quantum dots are subjected to in-situ growth to prepare a silver metavanadate quantum dot / carbon nitride nanosheet composite material; the silver metavanadate quantum dot / carbon nitride nanosheet composite material and graphene oxide carry out hydrothermal reaction, and are then frozen and dried to prepare silver metavanadate quantum dot / carbon nitride nanosheet / graphene hybrid aerogel which is the visible-light response hybrid aerogel. The problems of large reduction dosage, serious secondary pollution, complexity in operation and the like generated when waste gas is processed by a traditional flue gas denitration technology are overcome.

The invention provides a preparing method for CdSe / CdZnSeS / ZnS core-shell quantum dots. The preparing method is simple in synthesis method, short in synthesis time and high in quantum efficiency and stability, and is characterized by including the following steps that (1) zinc sources, cadmium sources, an organic solvent and organic ligand are mixed and stirred to be even, then the mixture is heated to be at the temperature of 260 DEG C to 320 DEG C, and protection gas is introduced into the whole reaction process; (2) in the stirring state, a selenium precursor and a sulfur precursor which are mixed to be even are rapidly injected; (3) after the precursors in the step (2) are completely injected, timing is started, and in 0 s to 30 s, the sulfur precursor is injected again; (4) at the temperature of 260 DEG C to 300 DEG C, the mixture is reacted for 1 min to 60 min. The preparing method for the CdSe / CdZnSeS / ZnS core-shell quantum dots has the advantages that CdZnSeS serves as a medium and is connected with a core CdSe and a shell CdS, the lattice matching performance between the cores and the shell layers of the quantum dots is high, the light stability and the heat stability between the cores and the shell layers of the quantum dots are quite high, and the yield of quantum can be 80% or above. The preparing method is simple in synthesis step, easy to operate and capable of facilitating large-scale production.

The invention relates to a rare earth / ionic liquid luminescent soft material and a preparation method thereof, belonging to the field of rare-earth functional materials. The luminescent soft material comprises the components of ionic liquid, rare-earth ions and organic ligand which have the mole ratio of 1:3:1.5-6; wherein the ionic liquid is ionic liquid (I) or ionic liquid (II) which has the above structural formula, wherein X=Br, (OTf), BF4, PF6 or NTf2; in the (I), R is alkyl containing 2-6 carbons, and n=2-5; in the (II), n1=2-5, and n2=2-5; the rare-earth ions are Nd, Sm, Eu, Gd, Ho, Er, Yb, Tm or Dy; and the organic ligand is one or a mixture of two in Bipy, Bath, Phen, TTA, PM, PT, PC and PF. The rare earth compound / ionic liquid material has rich luminescent colors, high color purity, long fluorescence service life, high quantum efficiency as well as strong heat stability and light stability, so as to be an optical soft material of great value, thus being widely applied to the fields such as display, optical waveguide amplification, solid-state lasers, medical science, biological marker, anti-counterfeit technology, etc.