50results about How to "Strong absorption peak" patented technology

The invention discloses a preparation method of an antioxidant walnut polypeptide health product. The preparation method comprises the following steps: pre-treating walnut pulp; homogenizing the walnut pulp; extracting walnut proteins; carrying out pre-treatment for enzymolysis; carrying out enzymolysis; separating; desalting; and concentrating and drying to obtain a walnut polypeptide product. Four enzymes: alkaline protease, papain, neutral protease and bromelain are sequentially added in different times in the enzymolysis link. The strength, function and synergy and the like of the effects of the four enzymes which are used for decomposing proteins into polypeptides and amino acids are comprehensively considered and the four enzymes are used for enzymolysis under the optimal enzymolysis conditions, respectively. The reducing capacity of the prepared walnut polypeptide manifests that the absorbancy floats up and down at 0.4, the hydroxyl free radical scavenging rate can reach 95%, the superoxide anion free radical scavenging rate can reach 39.5%, the protein extraction ratio can reach 98.71% and the degree of hydrolysis of the walnut polypeptide can reach 26.37%. Compared with the prior art, those items are greatly enhanced and improved relatively.

The invention discloses a natural plant sun-screening agent as well as a preparation method and application of the natural plant sun-screening agent. The natural plant sun-screening agent comprises mulberrin, isononyl isononanoate and vitamin E acetate, wherein the weight ratio of mulberrin to isononyl isononanoate to vitamin E acetate is 1:1:1-1:3:3. According to the natural plant sun-screening agent, the mulberrin, the isononyl isononanoate and the vitamin E acetate are compounded to form a stable mulberrin-containing sun-screening agent. The natural plant sun-screening agent and the traditional organic sun-screening agent and an inorganic sun-screening agent have a synergistic interaction function, and therefore, a sun care preparation added with the sun-screening agent is mild in skin and high in safety, and is greatly improved in SPF (Sun Protection Factor) value. The preparation method of the sun-screening agent is simple in process and low in production cost.

The invention relates to a lignin-based starlike thermoplastic elastomer and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out reaction on lignin and 2-bromoisobutyryl bromide to synthesize a lignin ATRP (atom transfer radical polymerization) macromolecular initiator; and (2) adding a hard monomer, a soft monomer, the lignin ATRP macromolecular initiator, a ligand and a good reaction solvent into a reaction bottle, fully stirring for dissolving, removing oxygen in the mixed solution by virtue of three circulating processes of freezing, vacuumizing and nitrogenization, adding a catalyst for reaction at 55-110 DEG C for 4-48 hours, filtering the collected precipitate by using a mixed liquid or methanol / water as a precipitator and drying to obtain the lignin-based starlike polymer with ultraviolet absorptivity and property of the thermoplastic elastomer. The lignin-based starlike polymer consisting of different monomers can be obtained by using the method. The mechanical property of the lignin-based starlike polymer is superior to that of a liner polymer with same compositions and the lignin-based starlike polymer can be used as a membrane material with ultraviolet absorptivity.

The invention discloses a photosensitive monomer, liquid crystal material, liquid crystal panel and manufacturing method, optoelectronic device and manufacturing method, the photosensitive monomer having a chemical formula denotation of, 'L1', 'L2', 'L3', 'L4', 'L5', 'L6' selected from hydrogen atom, fluorine atom, chlorine atom, cyano, alkylation, alkylation carbonyl, alkoxy carbonyl, alkylation carbonyl and alkylation carbonyl has 1~7 carbon atoms and at least one hydrogen atom replaced by fluorine atom or chlorine atom. 'R1', 'R2', 'R3' and 'R4' are selected from hydrogen atom, fluorine atom, chlorine atom, cyano, thiocyanato cyanide, five fluoride thiocyanato, nitrite, linear or branched alkyl chain and Z-Sp-P, and at least one of four for Z-Sp-P. 'Z' is selected from oxygen atom, sulfur atom, methoxy, carbonyl, carboxyl, amine formyl, methylthio, vinyl carbonyl, vinyl carbonylation and single key. 'Sp' is selected from linear or branched alkyl chains and single-key. 'P' is the polymerizable group.

The invention relates to a perylene anhydride type polyarylene sulfide with a tree structure, and a preparation method and application thereof, and belongs to polymer synthesis. The perylene anhydridetype polyarylene sulfide is obtained by introducing polyarylene sulfide into the structure of perylene anhydride. The obtained polyarylene sulfide has the photoelectric effect of the perylene anhydride and the excellent strength and plasticity of the polyphenylene sulfide; magneto-optic metal is further introduced to obtain the perylene anhydride type light effect multifunctional polyarylene sulfide polymer with the weight-average molecular weight of 20000-150000, the melt index of 5-500 / 10min, high temperature resistance (the melting point is 280-350 DEG C, and the decomposition temperatureis greater than 480 DEG C), strong absorption peak at 500-700nm, and variable magnetic property at room temperature to 200 DEG C; and the perylene anhydride type polyarylene sulfide is a novel high-temperature-resistant and high-strength flexible magneto-optical material, and has wide application.

The invention belongs to the technical field of photoelectric devices, and discloses a graphene high-sensitivity photoelectric detector and a preparation method thereof. The graphene high-sensitivity photoelectric detector comprises a composite substrate, an isolation layer, a graphene contact electrode, carbon quantum dots, a graphene film and an anti-reflection layer; the isolation layer is located on the composite substrate; the electrode is positioned on the isolation layer; the carbon quantum dots are positioned on the electrode; the graphene film is positioned on the electrode; the surface of the graphene film is covered with an anti-reflection layer; the composite substrate is formed by bonding a hard substrate and a brittle substrate; the hard substrate is made of silicon dioxide, and the brittle substrate is made of InP or Ge; and the anti-reflection layer is a transparent film composed of silicon dioxide. The prepared photoelectric detector is ultrathin, easy to integrate in a large area and high in sensitivity, the response speed of the photoelectric detector can be increased, and the photoelectric detector has wide application prospects in the fields of ray measurement and detection, industrial automatic control, photometers and the like.

The invention discloses a nonlinear optical crystal, which has a crystal structure the same as that of a YCa4O(BO3)3 crystal, and belongs to the field of a Cm space group and an m point group. The nonlinear optical crystal is a samarium-yttrium-calcium-oxygen borate crystal; the chemical formula of the nonlinear optical crystal is SmxY1-xCa4O(BO3)3, wherein x is more than 0 and less than 1; and the nonlinear optical crystal is obtained through a pulling method by adopting CaCO3, Y2O3, Sm2O3 and H3BO3 in stoichiometric proportion. The samarium-yttrium-calcium-oxygen borate crystal disclosed by the invention has good nonlinear optical property, can be used for manufacturing a laser nonlinear optical device and can increase the transformation and amplification efficiency of the laser nonlinear optical device by absorbing idler-frequency light with a specific wavelength.

The invention discloses preparation for a sunscreen humectant of a shampoo, and belongs to the field of chemical engineering. The light yellow transparent sunscreen humectant of the shampoo is prepared by the following steps of: putting raw materials, such as feather waste, sodium hydrogensulfite, urea and lauryl sodium sulfate into a container; adding distilled water, uniformly mixing the raw materials with the distilled water; respectively feeding nitrogen and argon to isolate air; reacting under the constant-temperature condition, leaching, and washing non-melted feathers by the distilled water; collecting a cleaning solution; and dialyzing the solution obtained by leaching and the cleaning solution in flowing water. The preparation method is simple in technique and convenient to operate; and the obtained product can be linked with hydrophilic groups exposed in damaged hairs to form a bond and achieve effects of repairing, moisturizing and enhancing. Compared with a chemical sunscreen, the sunscreen humectant does not have toxic and side effects; a human body is not allergic to the sunscreen humectant; and the sunscreen humectant is relatively high in hair adsorbability and is an ideal and natural sunscreen hair protection additive.

The invention belongs to the field of preparation of inorganic non-metallic materials and particularly relates to a preparation method of a tin dioxide / copper oxide composite nano material with a spherical hierarchical structure. The preparation method comprises the following steps: fully dissolving copper acetylacetonate and tin tetrachloride in a methanol solution, performing solvothermal reaction, filtering, washing, drying, calcining and cooling to obtain the tin dioxide / copper oxide composite nano material with the spherical hierarchical structure. The tin dioxide / copper oxide composite nano material prepared by the preparation method provided by the invention is high in purity and low in preparation cost, the size of a whole big ball is 3-6 mm, the size of a nano particle is 20-30 nm, the product uniformity and the dispersibility are good, and the large-scale production is easy. The tin dioxide / copper oxide composite nano material with the spherical hierarchical structure, prepared by the preparation method provided by the invention, has higher visible light photocatalytic activity and wide application prospect in the fields of dye wastewater and indoor harmful gas degradation, photocatalytic disinfection and the like.

The invention belongs to the field of inorganic non-metallic material preparation and particularly relates to a preparation method of a chromic oxide nano-material. The preparation method includes the steps that after chromium acetylacetonate is fully dissolved in a methanol solution, a solvothermal reaction is carried out, after filtering and washing are carried out, drying, calcining and cooling are carried out, and the chromic oxide nano-material is obtained. The process is simple, convenient and easy to carry out, product purity is high, the preparation cost is low, the size of the obtained product ranges from 30 nm to 50 nm, the uniformity and dispersity of the product is good, and the product is easily applied to practical large-scale production. The prepared chromic oxide nano-material can be used for the fields of enamel, ceramic, artificial leather, sun-proof paint, grinding materials, green polishing paste, printing ink special for printing paper money and the like.

The invention discloses a gold-zinc oxide hetero-junction nano-particle array and a method for preparing the same. Gold-zinc oxide hetero-junction nano-particles in the gold-zinc oxide hetero-junctionnano-particle array have polygonal starry morphology, gold nano-spheres are used as centers, and zinc oxide nano-sheets grow around the gold nano-spheres in a non-close manner. The method includes mixing the gold nano-spheres, zinc nitrate, sodium hydroxide and sodium borohydride with one another in water to obtain precursor mixed solution; carrying out reaction on the precursor mixed solution atthe temperature of 60-100 DEG C for 10-60 minutes to obtain gold-zinc oxide hetero-junction nano-particle colloidal solution; centrifugally separating the gold-zinc oxide hetero-junction nano-particle colloidal solution, dispersing the gold-zinc oxide hetero-junction nano-particle colloidal solution into n-butanol solution, carrying out treatment by the aid of gas-solution interfacial self-assembly processes and fishing up monolayer nano-particle arrays by the aid of substrates. The monolayer nano-particle arrays float on solution surfaces. The gold-zinc oxide hetero-junction nano-particle array and the method have the advantages that the gold-zinc oxide hetero-junction nano-particle array has intense absorption peaks in ultraviolet regions and visible regions and is high in catalytic reaction efficiency; processes for preparing the gold-zinc oxide hetero-junction nano-particle array are simple and environmentally friendly and are low in cost and free of pollution, and accordingly thegold-zinc oxide hetero-junction nano-particle array and the method are suitable for large-scale industrial production.

The invention discloses a natural plant sun-screening agent as well as a preparation method and application of the natural plant sun-screening agent. The natural plant sun-screening agent comprises mulberrin, isononyl isononanoate and vitamin E acetate, wherein the weight ratio of mulberrin to isononyl isononanoate to vitamin E acetate is 1:1:1-1:3:3. According to the natural plant sun-screening agent, the mulberrin, the isononyl isononanoate and the vitamin E acetate are compounded to form a stable mulberrin-containing sun-screening agent. The natural plant sun-screening agent and the traditional organic sun-screening agent and an inorganic sun-screening agent have a synergistic interaction function, and therefore, a sun care preparation added with the sun-screening agent is mild in skin and high in safety, and is greatly improved in SPF (Sun Protection Factor) value. The preparation method of the sun-screening agent is simple in process and low in production cost.

The invention discloses a triphenyl dioxazine imide diploid derivative and a preparation method thereof, and belongs to the technical field of organic synthesis. The material is a triphenyl dioxazine imide derivative with large conjugation and spatial distortion. According to the invention, monobrominated triphenyl dioxazine imide is adopted, and under catalysis of copper powder, a C-C single bond coupling method is adopted for synthesis. A triphenyl dioxazine imide diploid semiconductor material has excellent solubility in a common organic solvent, has strong absorption and high molar extinction coefficient in a visible light region, also has good oxidation-reduction characteristics and electron transmission performance, and can be applied to the field of organic photoelectricity.

The invention discloses a chlorin e6-nanogold compound for photothermal and photodynamic therapy of tumors and a preparation method of the chlorin e6-nanogold compound. The preparation method specifically comprises the following steps: preparing hollow spike-shaped nanogold through a replacement reaction of a chloroauric acid compound and silver nanoparticles; synthesizing a chlorin e6 functional molecule cross-linked with polyethylene glycol at the tail end of lipoic acid; and using the prepared nanogold as a carrier, and simultaneously compounding a certain proportion of lipoic acid polyethylene glycol methoxyl and LA-PEG-Ce6 on the surface of the nanogold, so that the chlorin e6-nanogold compound with dual functions of near infrared absorption and photosensitization is constructed. The compound has the advantages of low cost, simple preparation method, high stability, good biocompatibility and the like. A tumor cell experiment further proves that the GNS-Ce6 compound has a remarkable effect on improving the uptake efficiency of the chlorin e6 and the nanogold. The survival rate of cancer cells can be effectively reduced through mediated photothermal and photodynamic therapy.

The invention discloses a processing method for improving luminous efficiency and moisture resistance of a stannate red-light-emitting material. According to the method, a same-element low-valence ionreduction method is adopted, a core-shell structure is formed, the luminous efficiency and the moisture resistance of the acid salt red-light-emitting material are effectively improved, the stannatered-light-emitting materials A2SnF6: Mn<4+> and BSnF6: Mn<4+> are soaked in a Sn metal or Sn<2+> salt solution, A is one or more than two of Li, Na, K, Rb and Cs, and B is one or more than two of Mg,Ca, Sr, Ba and Zn. The method has the advantages of no introduction of new impurities, cheap and accessible raw materials, simple and feasible technique, mild conditions and low cost, effectively enhances the properties of the red light material, and is beneficial to large-scale industrial production.

The invention discloses a preparation method of cool sunscreen cream with an angelica-dahurica compound plant. The preparation method is characterized by comprising the following steps: adopting angelica-dahurica essential oil, liquorice flavone, green-tea essential oil, mint essential oil and honeysuckle essential oil to prepare compound essential oil; then in a reactor, adding the following components in percent by weight: 0.1-0.2% of carbomer and 25-30% of deionized water, after dissolving, adding 38-45% of compound essential oil, 6-10% of hexadecanol, 2-6% of silk fibroin, 2-4% of glycerinum and 15-20% of EM-90 emulsifier, stirring and mixing uniformly, adding triethanolamine, adjusting pH to be about 7.0, stirring at high speed, mixing together, standing for 24 hours, and thus obtaining the cool sunscreen cream with the angelica-dahurica compound plant and subpackaging into containers. The sunscreen cream emits natural fragrance, has the effects of bacteriostasis, skin moisturizing, whitening and sunscreen, has no side effect to a human body, is convenient in use and realizes average sunscreen effect of more than 90%.

The present invention relates to a method for manufacturing a preform for optical fibers, wherein deposition of glass-forming compounds on the substrate takes place. The present invention furthermore relates to a method for manufacturing optical fibers, wherein one end of a solid preform is heated, after which an optical fibre is drawn from said heated end.

The invention belongs to the technical field of functional material preparation, and relates to a preparation method of a chromium molybdate micron-nanometer material. The preparation method comprises the steps that molybdic acid and chromic nitrate are dissolved in an oxalic acid aqueous solution, water is evaporated to dryness on the condition that heating and stirring are conducted, a cross-linking reaction is conducted, heat treatment is conducted in a muffle furnace, and the chromium molybdate micron-nanometer material is obtained. According to the preparation method of the chromium molybdate micron-nanometer material, the technology is simple, convenient and easy to carry out, the purity is high, the impurity content is low, the product preparation cost is low, the performance is excellent, and industrial mass production can be conducted. The prepared chromium molybdate micron-nanometer material serves as a negative thermal expansion to use, and a wide application prospect in the aspects of aerospace materials, engine parts, integrated circuit boards, optical devices and the like is achieved.

The invention relates to a neodymium-doped bismuth zinc borate self-frequency-doubling crystal material, a cut shape and a preparation method and application thereof. The growth of NdxBi2-xZnB2O7 crystals with different doping concentrations is carried out by adopting a kyropoulos method and replacing Bi < 3 + > with an activated ion Nd < 3 + >. The invention also provides an application of the NdxBi2-xZnB2O7 crystal, employs semiconductor laser pumping with the central wavelength of 808nm, and the laser and nonlinear optical properties of the NdxBi2-xZnB2O7 crystal are utilized to obtain self-frequency doubling green light output with the output wavelength of 533nm. The laser has the advantages of compact structure, small size, high conversion efficiency, long service life, low cost, highthermal conductivity and the like, and can be used for high-power lasers.

The invention provides a fluoroborate dipyrrole fluorescent dye, a preparation method and application thereof, and belongs to the field of fluorescent dyes. The invention provides a fluoroboron dipyrrole fluorescent dye, centering on BODIPY, introducing toluene at the 8th position, increasing the conjugated system, introducing propylene at the 3rd and 5th positions, improving the electron-absorbing ability, making The ultraviolet absorption spectrum and the fluorescence emission spectrum of the obtained fluoroboron dipyrrole fluorescent dye have a large red shift, a strong absorption peak in the green light range, and a strong emission peak in the green light range in the fluorescence emission spectrum.

The invention discloses a gold-zinc oxide heterojunction nanoparticle array and a preparation method thereof. In the gold-zinc oxide heterojunction nanoparticle array, the shape of the gold-zinc oxide heterojunction nanoparticle is a polygonal star , with gold nanospheres as the center, ZnO nanosheets grow non-compactly around the gold nanospheres. The preparation method comprises: mixing gold nanospheres, zinc nitrate, sodium hydroxide and sodium borohydride in water to prepare a precursor mixed solution; then reacting it at 60-100°C for 10-60 minutes to prepare A gold-zinc oxide heterojunction nanoparticle colloidal solution was obtained, and then centrifuged, then dispersed in n-butanol solution, processed by the gas-liquid interface self-assembly method, and the single-layer nanoparticle floating on the liquid surface was processed with a substrate. The particle array can be scooped up. The invention not only has strong absorption peaks in the ultraviolet region and the visible region, and has high catalytic reaction efficiency, but also has simple preparation process, low cost, environmental protection and no pollution, and is suitable for large-scale industrial production.

The invention discloses a preparation method of an ultraviolet light-sensitive calcium-manganese oxide sol and thin film micro-pattern of the ultraviolet light-sensitive calcium-manganese oxide sol. The preparation method comprises the following steps: separately preparing Ca(NO3)2.4H2O, Mn(CH3COO)2.4H2O and 2,2'-bipyridyl into methanol solutions, then mixing the methanol solutions according to aratio, adding acrylic acid, and carrying out volume determining and aging to obtain an ultraviolet light-sensitive CaMn7O12 sol; preparing a sol thin film on a substrate by a dipping pulling method byusing the ultraviolet light-sensitive CaMn7O12 sol, and carrying out drying, exposure, dissolving washing and heat treatment to obtain the CaMn7O12 thin film micro-pattern. The CaMn7O12 is a single-phase multiferroic material and has a strong magnetoelectric coupling effect, and the sol has a strong absorption peak at 298 nm. According to the ultraviolet light-sensitive CaMn7O12 gel thin film obtained through the dipping pulling method, the thickness of the thin film is easy to control, the size is large, the profile is clear, the structure is regular, the thin film is free of pollution, andperformance is stable.

The invention discloses a photosensitizer based on a thiadiazolo [3, 4-g] quinoxaline structure, the photosensitizer has a strong absorption peak in a wavelength range of 450-750 nm and has efficient H < + > production performance under illumination, acid radicals have efficient H < + > abstraction performance in a dark state, a photoreaction and a dark reaction cooperate to kill tumors, and meanwhile, regeneration of a compound can be completed; and the tumor cell killing effect is not limited by the oxygen content. In addition, compounds included in the photosensitizer are simple in structure, small in molecular weight, high in modifiability, adjustable in performance and easy to prepare, purify and synthesize in batches. Therefore, the photosensitizer has a good application prospect in the aspect of preparing reversible acid tumor treatment drugs.

The invention discloses a preparation method, a product and application of biological electronic hydrogel. The preparation method comprises the following steps: mixing a carboxylic acid monomer, a calcium ion solution, polyvinyl alcohol, gold nano rods, distilled water and a photo initiator according to a certain ratio; and under the irradiation of ultraviolet rays, carrying out polymerization toobtain hydrogel. Ions are chelated with ions in macromolecules to construct a first crosslinking site; the gold nano rods and the polyvinyl alcohol crystalline phase construct a second crosslinking site, the mechanical property, the self-repairing property and the conductivity of the hydrogel are effectively improved, and meanwhile, a bacterial biofilm can be efficiently destroyed, so that the hydrogel can be used as an excellent mechanical soft material, a self-repairing ionic electronic skin and a biological multifunctional sensing body.

The invention relates to a preparation method for a functionalized gold nanostar / siRNA compound modified through RGD and stabilized through dendritic macromolecules. The method comprises the steps that gold nanoparticles are prepared through a sodium citrate reduction method, and AuNSs is prepared through a seed growing method; excessive MTG is dropwise added into a G3.NH2 solution, the excessive MTG and the G3.NH2 solution are subjected to thermostatic reaction to obtain G3.NH2-SH, then the G3.NH2-SH is dropwise added into an AuNSs aqueous solution, and the G3.NH2-SH and the AuNSs aqueous solution are stirred to obtain G3-AuNSs; 6-M and COOH-PEG-NH2 are subjected to reaction to obtain COOH-PEG-MAL; and then SH-RGD and the COOH-PEG-MAL are subjected to reaction to obtain COOH-PEG-RGD, the COOH-PEG-RGD is added into DMSO dispersion liquid of the G3-AuNSs after being activated, and Au DSNSs is obtained through reaction and hatched with VEGF siRNA, so that the functionalized gold nanostar / siRNA compound is obtained. According to the preparation method, the reaction condition is mild, the process is simple, and the method is easy to operate and has potential application value in the diagnosis and treatment integration field.