34results about How to "Photostable" patented technology

Provided is preparation of a water-soluble luminous silver nano cluster with double-stranded DNA as a template. Firstly, single-stranded DNA rich in cytosine base group is used, 6 cytosine base group loops are reserved in the single-stranded DNA, the total number of the cytosine base groups is 29, single-stranded DNA rich in guanine base group complements the single-stranded DNA and is added, the total number of the guanine base groups is 23, the double-stranded DNA with the 6 cytosine base group loops is formed through the annealing function and is used as the template, and synthesis is achieved through the method of adding sodium borohydride to restore silver nitrate. The preparation process is simple, easy to implement and environmentally friendly, and the preparation can be applied to the preparation of other luminous nano materials. In addition, new nano materials synthesized through the method have water solubility, a high quantum yield, light stability, good biocompatibility and other performance, and have potential wide application to the fields of biosensors, cell imaging, clinical medicine and the like.

The invention relates to a silver thiosulfate complex or silver-ammonia complex-containing hygroscopic silver-containing product and a preparation method thereof. The invention discloses a hygroscopic silver-containing antibacterial product which comprises a silver thiosulfate complex or a silver-ammonia complex as an antibacterial ingredient, the silver thiosulfate complex or the silver-ammonia complex is evenly distributed and combined on the inner side and / or surface, the hygroscopic silver-containing antibacterial product comprises 0.01-10 wt% of silver, and the moisture absorption ability of the hygroscopic silver-containing antibacterial product is 6g/ g and above. The invention also provides a preparation method of the hygroscopic silver-containing antibacterial product as well as a silver-containing antibacterial product dressing prepared from the hygroscopic silver-containing antibacterial product. The hygroscopic silver-containing antibacterial product has a very wide antibacterial spectrum, shows strong antibacterial activity to gram-negative bacteria and gram-positive bacteria, is rapid in effect, has light stability, and can be widely applied to chronic infections exudative wounds.

The invention relates to a preparation method of a multi-tone beet red pigment, and the preparation method is characterized in that fresh red beet is adopted as a raw materials to be continuously produced through the procedures of washing, slicing, extraction, filtering, column chromatography, color protection, concentration, color matching, ultrafiltration, microcapsulization, atomizing drying and mixed treatment, a beet red pigment product is obtained by utilizing a method combining a staging elution process of macroporous resin with a particular model number, pure water with particular electric conductivity and the mixed antioxidant, the color value of the beet red pigment product is more than or equal to 80, color tones include orange red (b: 14 to 8), pink (b: 8 to 5), true red (b: 5 to 0) and amaranth (b: 0 to 10). The beet red pigment has characteristics of light resistance, heat resistance, stability and the like. The beet red pigment is better than similar product standard both at home and abroad.

The invention discloses a micron-grade arachidonic acid emulsion liquid and a preparation method thereof. The emulsion liquid 1000g in total weight comprises 50g-150g of arachidonic acid, 10g-70g of oil-phase emulsifier, 0.1g-20g of antioxidant, 5g-40g of water-phase emulsifier, 60g-300g of thickened stabilizer, 10g-200g of dispersant and others of water. The emulsion liquid of the invention is O/W type, and the emulsion liquid with stable state and emulsified grain size of less than 1 micron is obtained mainly by the emulsifier and the thickened stabilizer of certain percentage go through the emulsification process with ARA oil and water. The task of the invention is to provide a formula for preparing an ARA emulsion liquid that can be dispersed in cold water and has good stability, and is stable against light, heat and oxygen, and the formula can be conveniently applied in the relevant industries of the drink industry, etc.

The invention relates to a resveratrol composite film agent. The film agent takes L-polylactic acid and lignin-grafted D-polylactic acid copolymer as a main film forming material; by utilizing a solution blending method and simultaneously introducing resveratrol, the composite film agent with good mechanical property, thermal stability, UV resistance, biocompatibility and drug slow release is prepared in a compounding manner. On one hand, a stereocomplex formed by L-polylactic acid and D-polylactic acid molecular chains can significantly improve the compatibility of the polylactic acid with the lignin and improve the mechanical properties of the lactic acids; on the other hand, the lignin and resveratrol have a similar polyphenol structure and a certain ultraviolet resistance, so that thestability of the resveratrol can be improved, and the long-acting release is realized.

The invention provides an anti-fouling TPU protection film for a car body. The anti-fouling TPU protection film comprises a TPU transparent film, a pressure-sensitive adhesive and an anti-sticking layer, wherein the surface of the TPU protection film contains an anti-fouling coating; the pressure-sensitive adhesive is an acrylate, polyurethane or organosilicon pressure-sensitive adhesive; and theanti-sticking layer is release paper or a PET release film. According to the invention, the aliphatic TPU film with low yellowing index is used as a basic film, and the surface tension of the film isimproved through solvent corrosion, so the adhesion of the anti-fouling coating on the surface of the film is improved; fluorocarbon-modified polyacrylate or organosilane-modified polyacrylate is usedas an anti-fouling component of the anti-fouling coating, so the coating has good self-cleaning performance, anti-fouling performance, transparency and compactness; and the film can be conveniently applied on the surface of the car body, can replace waxing, glaze sealing, paint spraying and the like of cars, and is also capable of improving the luster of the car body and protecting the car body from oil stains, water stains and scratches.

The invention discloses a preparation method of a jellyfish-shaped carbon nitride photocatalytic material with high specific surface area. The main preparation process is as follows: performing combustion on a raw material hydrocarbon in the air and enabling one part of the raw material hydrocarbon to be cracked to generate carbon black; performing stirring and ultrasonic treatment on a reaction mixture of melamine and polyacrylamide at room temperature, and transferring the reaction mixture into a drying oven to dry; putting the product into a muffle furnace, heating at 500 to 600 DEG C and at the heating rate of 20 DEG C/minute for 100 to 150 minutes, adding the obtained carbon black when the temperature is decreased to 300+/-10 DEG C, mixing, stirring uniformly, and grinding by an agatemortar into uniform powder to obtain the novel jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area. In the prepared jellyfish-shaped g-C3N4 photocatalytic material with high specific surface area, the specific surface area of the g-C3N4 is increased by 10 to 30 times, the carbon black can serve as an ultraviolet stabilizer due to the light stability, and the durabilityof the photocatalytic material is improved. The preparation method is cheap in raw material, simple in process and suitable for industrialized mass production.

The invention relates to a novel silver-containing antibacterial product, and a preparation method thereof. The novel silver-containing antibacterial product contains a silver-containing alcohol amine chelate as an antibacterial component; the silver-containing alcohol amine chelate is uniformly distributed in, and is combined with the internal part and/or the surface of the novel silver-containing antibacterial product. The novel silver-containing antibacterial product contains, by weight, 0.01 to 10% of silver, and the moisture absorption capability of the novel silver-containing antibacterial product is higher than 6g/g. The invention also provides a preparation method of the novel silver-containing antibacterial product, and a silver-containing dressing prepared from the novel silver-containing antibacterial product. The antibacterial spectrum of the novel silver-containing antibacterial product is wide; the novel silver-containing antibacterial product possesses high antibacterial activity on Gram-negative bacteria and Gram-positive bacteria, and light stability; effect is achieved quickly; and the novel silver-containing antibacterial product can be widely used for chronic infective wounds.

The invention discloses an environment-friendly printing ink, which comprises the following raw materials by weight: 50-100 parts of natural pigment, 10-50 parts of linseed oil, 20-60 parts of water-soluble modified abietate resin, 30-80 parts of filler, 25-55 parts of an additive and 100-200 parts of water. The natural pigment is divided into red, yellow and blue colors, the red, yellow and blueraw materials are safflower, sophora flower and bluegrass respectively, and the preparation method comprises the following steps: raw material selection and cleaning, raw material cooking, raw material distillation, powder grinding, raw material mixing and ink packaging. The natural pigment is prepared through natural plant processing, compared with an existing pigment for ink, the pigment for inkis brighter in color, environmentally friendly and free of pollution, the problem that the existing pigment for printing ink is not bright in color or contains toxic substances is solved, and the printing ink has the anti-allergic characteristic and can be applied to printing of clothes.

An assistant composition used for a polymer includes a triazine light absorbent, a component containing a polyisocyanate group, and a hindered amine component containing a reaction function group, and the reaction function group comprises at least one of a hydroxyl group, a mercapto group and an amino group. The assistant composition used for the polymer is added to the polymer in order to form a composite material having good light stability and being difficult to deteriorate.

The invention belongs to the field of high polymer materials, and especially relates to a low-cost low-temperature plastic dipping PVC glove forming process method. The low-temperature plastic dippingPVC glove forming process method uses chloro-ether resin and allyl resin monomers, low-temperature plastic dipping of PVC gloves is realized through in-situ polymerization and synchronous crosslinking, the preparation cost is low, a hand mold does not need to be preheated, high temperature production environment is not needed, energy consumption is low, the production working environment and conditions are improved, the prepared PVC gloves are more durable, good in sealing performance, free of peculiar smell, large in elasticity, resistant to acids and alkalis, convenient and comfortable to wear, integrally formed, non-sticky, convenient and safe, free of natural latex allergic protein and free of anaphylactic reaction, and the strength, the corrosion resistance and the hygienic propertyare improved.

The invention discloses high-efficiency dandruff-removing and itching-relieving shampoo and a preparation method thereof. Ketoconazole tablets, citric acid and kelp are used as raw materials; ketoconazole carbon dots and kelp carbon dots are synthesized in one step through a hydrothermal method; and the synthesized carbon dots and plant essential oil are compounded into a novel antifungal agent which is used for preparing dandruff-removing and itching-relieving shampoo. The antifungal agent in the shampoo has very excellent antibacterial property on malassezia; the antibacterial effect of theantifungal agent is superior to that of a positive control drug ketoconazole; furthermore, the antifungal agent has no drug resistance; and the prepared shampoo has obvious dandruff-removing and itching-relieving effects. The synthetic raw materials of the antifungal agent are easy to obtain; the synthetic method is simple, safe and effective; and the antifungal agent is a brand-new antifungal agent.

The invention relates to a fluorescent probe with enhanced fluorescence generation in the presence of singlet oxygen. The invention provides a fluorescent probe which can be used for selectively detecting singlet oxygen generated in various chemical reaction, photosensitization reaction and photocatalysis reaction systems in a solution phase. Fluorescent dye BODIPY with absorption and emission overlapped to a certain extent is adopted as a fluorescent parent, an anthracene functional group is introduced into the fluorescent parent to serve as an active center for selectively reacting with thesinglet oxygen, and alkynyl is innovatively connected with two groups, so that the fluorescence intensity is changed before and after the reaction with the singlet oxygen; and the ratio change of theabsorption intensity is generated by utilizing the change of the conjugated structure of the probe molecule before and after the reaction of the anthracene functional group and the singlet oxygen.

A method for preparing composite wood comprises the following steps: a polymer and an additive composite are mixed to form a mixture, wherein the additive composite comprises a component with a polyisocyanate group and a hindered amine component with a reaction functional group, and the reaction functional group in the hindered amine component with the reaction functional group comprises at least one of the following groups as follows: hydroxyl, a thiol group and amino; the component with the polyisocyanate group and the hindered amine component with the reaction functional group in the mixture are subjected to an addition reaction.