33 results about "Copper alginate" patented technology

The invention discloses antibacterial gauze or bandage and its preparation method. The antibacterial gauze or bandage is prepared by blending of 80-99 wt% of medical absorbent cotton and 1-20 wt% of copper alginate fiber. The prepared gauze or bandage has good biosecurity and high antibacterial rate, is broad-spectrum antibacterial and environmentally friendly, has good compliance and is low-cost. In addition, antibacterial rate of the gauze or bandage is greater than 99%.

The present invention discloses nanoparticles of cadmium alginate, lead alginate and copper alginate, and a preparation method thereof, and applications of the nanoparticles of the cadmium alginate, the lead alginate and the copper alginate in preparation of electrochemical immunoassay probes. According to the present invention, cadmium ions, lead ions or copper ions are respectively subjected to cross-linking with sodium alginate to prepare the nano-scale nanoparticles of the cadmium alginate, the lead alginate and the copper alginate and generate distinguished electrochemical signals; the preparation method is characterized in that the preparation conditions are mild, and the product can be directly used for labeling without additional signal substances; with the electrochemical immunosensor prepared by using the nanoparticles of the cadmium alginate, the lead alginate and the copper alginate to label different antibodies, the simultaneous detection on three targets without partition can be achieved; and the nanoparticle immunoassay probes of the cadmium alginate, the lead alginate and the copper alginate, and the electrochemical immunosensor prepared from the nanoparticles of the cadmium alginate, the lead alginate and the copper alginate have wide application prospects in the immune sensing field.

The invention discloses a preparation method of an alginate hydrogel antibacterial filter membrane containing copper phosphate. The method comprises the following steps: fully mixing and dissolving soluble phosphate and sodium alginate to obtain a membrane casting solution; scraping the membrane casting solution to form a membrane, soaking the membrane in an aqueous soluble calcium salt solution for sufficient crosslinking, and generating calcium phosphate in situ in the hydrogel while generating a calcium alginate hydrogel; and soaking the obtained calcium alginate hydrogel membrane containing calcium phosphate in an aqueous solution of a mixture of diluted hydrochloric acid and a soluble copper salt, reacting the diluted hydrochloric acid with calcium phosphate to release phosphate radicals, reacting the phosphate radicals with copper ions to generate copper phosphate, and capturing parts of calcium ions in calcium alginate by the copper ions to generate copper alginate in order to obtain the alginate hydrogel antibacterial filter membrane containing copper phosphate. Phosphate generated in situ in the hydrogel improves the mechanical properties of the alginate hydrogel, and thecopper phosphate makes the alginate hydrogel have good antibacterial properties.

The invention discloses a nonwoven fabric for a mask base material and a preparation method thereof. The nonwoven fabric for a mask base material is composed of 60-90wt% nano-silver-containing alginate fibers and 10-40wt% copper alginate fibers. The nano-silver-containing alginic acid fiber is produced by blending and spinning sodium alginate and nano-silver-containing zirconium phosphate nano-compounds, and the nano-silver ions are contained in the zirconium phosphate nano-particles. The invention has the characteristics of white appearance, good antibacterial property, high hygroscopicity, high moisture retention, high air permeability, good biocompatibility, simple production process and low cost.

The invention relates to a processing method of cotton and copper alginate blended yarn and belongs to the technical field of yarn manufacturing processes. Copper alginate fiber and cotton are pretreated respectively, and after the copper alginate fiber and the cotton are mixed evenly, mixed fiber is sequentially subjected to opening picking, carding, combing, drawing, roving and spinning, wherein the opening picking process comprises the steps that the mixed fiber sequentially passes through a bale plucker, a mixing opener, a roller card wire opener, a vibration cotton feeding box and a single beater scutcher to be treated, the roller card wire opener and all beater screens of the single beater scutcher are sealed; a half holding and beating gauge is adopted, and in the carding process, controllable half-hold licker-in opening is adopted; needle teeth small in working angle and low in density are adopted in carding machine card clothing. When applied to processing of the copper alginate fiber and cotton mixed yarn, the method has the advantages that the mixed yarn is less in hairiness, high in strength, less in nep, good in yarn levelness and the like.

The invention discloses cadmium alginate, lead alginate and copper alginate nanoparticles, a preparation method thereof and an application in preparation of electrochemical immune probes. The invention prepares nanoscale cadmium alginate, lead alginate and copper alginate spherical particles by respectively cross-linking sodium alginate with cadmium ions, lead ions or copper ions in microemulsion, and can generate distinguishable electrochemical signals. The preparation method of the invention is characterized by mild preparation conditions and can be directly used for labeling without adding signal substances. The electrochemical immunosensor prepared by using the cadmium alginate, lead alginate and copper alginate nanoparticles to label different antibodies can realize the simultaneous detection of three targets without partitioning. The cadmium alginate, lead alginate and copper alginate nano particle immunoprobe and the electrochemical immunosensor prepared therefrom will have broad application prospects in the field of immunosensing.

The invention belonging to the field of cosmetics, and particularly relates to a Sargassum horneri boiled alga clay mask and a preparation method thereof. The preparation method comprises the following steps: removing impurities from Sargassum horneri, washing, drying until the algae become embrittled, stamping the dried Sargassum horneri to granules, immersing in alcohol for 8-20 hours, filtering, boiling for 15-120 minutes, filtering to obtain alga clay, carrying out centrifugal dehydration and freeze-drying, and grinding into powder; weighing raw materials according to the formula; adding deionized water into the weighed Sargassum horneri powder, and stirring to swell; and dissolving a moisturizer, an antioxidant, a metallic ion chelator, a preservative, a whitener, a deodorizer, a sebum inhibitor, a cutin dissolving agent, a bacteriostatic agent, an antiallergic agent and a nutrient additive in deionized water, adding the Sargassum horneri clay, continuing stirring while adding a tackifying agent and deionized water, and stirring uniformly. The mask has the advantages of favorable moisturizing property, low cost and low price, obviously improves the skin color, moisturizes the skin, and prevents the skin from aging.

The invention discloses a laccase-nanoflower-γ-Fe 2 o 3 Copper alginate gel beads and its preparation method and application, the gel beads are passed through sodium alginate, γ-Fe 2 o 3 Ferrofluid colloidal solution and laccase-copper phosphate hybrid nanoflowers were stirred in water and added dropwise to copper chloride solution at a constant speed; sodium alginate, γ-Fe 2 o 3 The mass ratio of ferrofluid colloid solution to laccase-copper phosphate hybrid nanoflowers is 3000:30000-70000:5-50; γ-Fe 2 o 3 In ferrofluid colloidal solution, γ‑Fe 2 o 3 The particle diameter of the particle is 10nm; the diameter of the laccase-copper phosphate hybrid nanoflower is 15-20 μm. Laccase-nanoflower-γ-Fe of the present invention 2 o 3 Copper alginate gel beads showed higher catalytic efficiency than free enzymes in catalyzing the degradation of chlorophenols and the oxidation of polycyclic aromatic hydrocarbons and phenolic compounds, and showed good reusability and storage stability.

The invention discloses a method for preparing a copper ion selective adsorbent by sodium alginate / chitosan compounding. The method comprises the following steps of firstly preparing a copper alginatepellet, afterwards, compounding the copper alginate pellet with chitosan, next, carrying out aldehyde pre-cross-linking and epoxy chloropropane cross-linking on a copper alginate / chitosan composite pellet, and finally eluting a copper ion by using hydrochloric acid to obtain the copper ion selective adsorbent. According to the method, the copper ion is used as a curing agent of sodium alginate and a template of ionic imprinting; a calcium ion is not added in a whole course; the construction of an imprinting site of the copper ion is ensured; the stepwise cross-linking is carried out on the composite pellet by adopting different cross-linking agents; the cross-linked structure is optimized; the recognizability of the imprinting site to the copper ion is enhanced; the selectivity of the adsorbent to the copper ion is improved. The method is wide in raw-material source, simple in preparation process and lower in production cost, and the adsorbent prepared by the method provided by the invention is high in adsorption quantity to the copper ion and good in selectivity, can be repeatedly recycled, moreover, is environmentally friendly, and has wide development and application prospects.

The invention relates to an alkaline phosphatase or alpha fetoprotein detection method based on copper ion response pyrophosphate. Comprising the following steps: (1) preparing a copper alginate hydrogel and a sodium pyrophosphate solution; (2) preparing an alkaline phosphatase standard solution and an alpha fetoprotein standard solution with gradient concentrations; (3) drawing an alkaline phosphatase standard curve; (4) drawing an alpha fetoprotein standard curve; and (5) detecting the contents of alkaline phosphatase and alpha fetoprotein in the sample to be detected. The alkaline phosphatase or alpha fetoprotein detection method based on copper ion response pyrophosphate radical provided by the invention has the advantages of simple operation process, low cost, low reagent consumption and the like, the detection limit of alkaline phosphatase is 1.7 mU / mL, the quantitative detection limit of alpha fetoprotein is 0.8 ng / mL, the problems of complexity and high cost of the existing detection method are effectively solved, and the method is suitable for industrial production. And a development prospect is provided for clinical diagnosis and application.

The invention discloses a copper alginate / copper ferrocyanide blend fiber and a preparation method thereof, and relates to the technical field of radionuclide purification materials. According to the copper alginate / copper ferrocyanide blend fiber and the preparation method thereof provided by the invention, sodium ferrocyanide is added into a sodium alginate solution to prepare a sodium alginate / sodium ferrocyanide spinning solution; a copper sulfate solution is adopted as a coagulating bath, the sodium alginate / sodium ferrocyanide spinning solution is subjected to wet spinning forming to form the copper alginate fiber, and meanwhile copper ferrocyanide particles are separated out in situ in the copper alginate fiber to obtain the copper alginate / copper ferrocyanide blend fiber. According to the copper alginate / copper ferrocyanide blend fiber, copper alginate serves as a dispersion medium of copper ferrocyanide, the technical problem that powdered copper ferrocyanide has relatively poor adsorption capacity on radionuclide cesium can be solved, and the technical effect of improving the adsorption capacity of copper ferrocyanide on radionuclide cesium is achieved.

The invention relates to a preparation method of immobilized laccase for treatment of organic pollutants in water in the field of biological environment governance. Laccase and hemoglobin serving as a mediator are added into a sodium alginate solution, the substances are mixed, then the mixed solution is dripped into a CuSO4 solution to carry out reaction so as to obtain precipitate, i.e. immobilized laccase. According to the invention, hemoglobin is used as a protein mediator and is immobilized on a copper alginate carrier together with laccase to improve the activity of laccase, at the same time the level for treatment of organic pollutants in water is also enhanced. With a treatment concentration of 0.1mM for pollutants in a water sample, the method can be applied to treatment of water samples in polluted areas.

The invention discloses a preparation method of a high-activity copper alginate catalyst. The high-activity copper alginate catalyst is prepared from biopolymer, namely copper alginate, which is wide in resource, low in price, free of toxicity and environmentally friendly. Transitional metal copper ion (Cu2+) serves as the active center of the high-activity copper alginate catalyst; the high-activity copper alginate catalyst is characterized in that adjacent hydroxy of sodium alginate is oxidized into aldehyde group to obtain an intermediate product, namely dialdehyde alginate, and dialdehyde alginate is subjected to further imidization and then is in cross-linking with metal ion so as to obtain the high-activity copper alginate catalyst. The preparation method has the advantage of increasing metal loading quantity (namely quality of active sites ) to improve catalytic activity of the catalyst.

The invention discloses a preparation method of an alginate hydrogel antibacterial filter membrane containing copper phosphate. First, the soluble phosphate and sodium alginate are fully mixed and dissolved to obtain a casting solution. The casting solution is scraped into a film and immersed in a soluble calcium salt solution to fully cross-link, and at the same time as the calcium alginate hydrogel is formed, calcium phosphate is generated in situ in the hydrogel. Then the obtained calcium alginate hydrogel film containing calcium phosphate is soaked in the aqueous solution of the mixture of dilute hydrochloric acid and soluble copper salt, the dilute hydrochloric acid reacts with calcium phosphate to release phosphate, and the phosphate reacts with copper ions to form copper phosphate. Copper ions can capture part of the calcium ions in calcium alginate to generate copper alginate, thereby obtaining an antibacterial filter membrane of alginate hydrogel containing copper phosphate. The in situ generated phosphate in the hydrogel improved the mechanical properties of the alginate hydrogel, and the copper phosphate endowed the alginate hydrogel with good antibacterial properties.

The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a high-catalytic efficiency and recyclable photocatalyst, aiming at solving the problem that the existing catalyst is difficult to recycle. The preparation method of the high-catalytic efficiency and recyclable photocatalyst comprises the following steps of: adding sodium alginate into carbon nano-particle suspending liquid, and drastically stirring to obtain mixed liquid; evenly spraying copper chloride or acid copper solution on the surface of the mixed liquid and reacting to form copper alginate gel with a through hole structure; soaking the copper alginate gel in sodium hydroxide or potassium hydroxide solution and re-spraying hydroxylamine hydrochloride solution or sodium borohydride solution to obtain a composite structure that the surfaces of the carbon nano-particles are modified by cuprous oxide nanocrystalline grafted onto the inner wall of the through hole structure, namely the photocatalyst. The photocatalyst prepared by the method is recyclable, is convenient to recover, and can be widely used for converting the solar energy into the chemical energy, degrading or converting the harmful substances in the environment, preparing the hydrogen energy, etc.