6 results about "Glutaraldehyde" patented technology

The invention relates to a preparation method of an adsorption material for selectively adsorbing silver ions. The preparation method comprises the following steps: uniformly dispersing a chitosan-graphene oxide composite material in an acetic acid solution, adding 3-mercaptopropyltrimethoxysilane, uniformly stirring the obtained solution, adding a sodium hydroxide solution to adjust the pH value of the obtained system, adding a glutaraldehyde solution, stirring the solutions to obtain a uniformly mixed solution, standing the uniformly mixed solution at 3-4 DEG C for 20 h or more, and carrying out post-treatment to obtain the mercapto modified chitosan-graphene oxide composite material. The preparation method overcomes the shortcoming of difficulty selective adsorption of the silver ions from a complex environment of adsorption materials in the prior art. The adsorption material prepared in the invention has large adsorption capacity, can quickly selectively adsorb silver ions, and makes the silver ion adsorption balance time much shorter than the adsorption balance time in the prior art.

The present application discloses a polyvinyl alcohol composition, as well as a preparation method and polyvinyl alcohol medical catheter containing thereof, wherein raw materials include the following components: 60-90 parts of polyvinyl alcohol; 0.1-3 parts of glutaraldehyde; and the polyvinyl alcohol composition is made by mixing the polyvinyl alcohol in molten state with the glutaraldehyde in an acidic environment.

The invention discloses an electrochemical sensor electrode for rapidly and simultaneously detecting lead ions and cadmium ions as well as a preparation method and application of the electrochemical sensor electrode, and belongs to the technical field of electrochemical sensors. According to the invention, a bovine serum albumin-aminated graphene oxide-glutaraldehyde cross-linking material is synthesized in situ on the surface of a screen-printed carbon electrode, and a flower-like bismuth tungstate material is loaded on the surface of the electrode by a dispensing method, so that an electrode sensitive interface of the sensor is constructed; and simultaneous square wave anodic stripping voltammetry detection of trace lead and cadmium ions is realized. Compared with the prior art, the method has the advantages of high sensitivity, accurate result, simplicity in operation, easiness in carrying, recyclability and the like, and the heavy metals lead and cadmium in the water body can be rapidly and quantitatively analyzed and detected at the same time without pretreatment.

The present invention discloses a corrosion-resistant and aging-resistant building brick, which comprises the following raw materials in weight part: 20-30 parts of cement, 5-15 parts of meerschaum, 5-15 parts of fly ash, 1-4 parts of magnesium oxide, 5-12 parts of calcium hydrate, 1-6 parts of barite, 15-25 parts of attapulgite, 1-4 parts of wollastonite, 5-12 parts of construction wastes, 5-12 parts of modified montmorillonite, 1-2 parts of cyclodextrin, 0.2-0.8 part of ethylene-vinyl acetate copolymer, and 0.1-0.5 part of polysiloxanes powder. The preparation process of the modified montmorillonite comprises the steps of adding montmorillonite powders and sodium dihydrogen phosphate into an oxalic acid solution, stirring the solution, standing the solution, extracting an upper layer of suspending liquid, adding sodium hydroxide into the suspending liquid, stirring, adding oxalic acid, stirring, adding potassium dihydrogen phosphate, stirring, adding ethylene diamine tetraacetic acid, stirring, centrifuging, drying, crushing, then adding a silane coupling agent and water to adjust the pH value of the system, stirring, filtering, washing, adding a glutaraldehyde aqueous solution, stirring, filtering, and drying to obtain the modified montmorillonite.