2 results about "Pluronic F68" patented technology

The application discloses a pH-induced photothermal enhancement type cellulose hydrogel and a preparation method and application thereof. The pH-induced photothermal enhancement type cellulose hydrogel is prepared by the following steps: preparing cellulose nanocrystals with pH / near-infrared light responsiveness by chemically grafting intrinsic state polyaniline on the surface of carboxylated cellulose nanocrystals, preparing pH-responsive drug-loaded cellulose nanocrystals by chemically modifying anti-inflammatory drugs on the surface of dialdehyde cellulose nanocrystals, and assembling the drug-loaded micelles formed by coating a carbon monoxide donor, manganese pentacarbonyl bromide, with a temperature-sensitive reagent, pluronic F68, into the pH-induced photothermal enhancement type cellulose hydrogel. The pH-induced photothermal enhancement type cellulose hydrogel has the pH-induced photothermal enhancement performance, can generate carbon monoxide under hydrogen peroxide stimulation, can controllably release anti-inflammatory drugs under pH stimulation, and can respond to sol-gel transition above 33 DEG C.

The invention relates to the field of petrochemical engineering, in particular to a ZSM-5 molecular sieve with high dispersity and low silica-alumina ratio as well as a preparation method and application of the ZSM-5 molecular sieve. The preparation method provided by the invention comprises the following steps: mixing water, a silicon source, a seed crystal and a mineralizing agent to obtain a mixed solution 1; mixing water, an aluminum source and an alkaline substance to obtain a mixed solution 2; mixing the mixed solution 1 with the mixed solution 2 to obtain a mixed solution 3; mixing the mixed solution 3 with an additive and a template agent to obtain a mixed solution 4; stirring and aging the mixed solution 4, and then crystallizing to obtain a crystallized material; carrying out ammonia exchange on the crystallized material by using an NH4Cl solution, and then calcining to obtain a ZSM-5 molecular sieve; wherein the additive is selected from at least one of poloxamer 188, poloxamer 338, poloxamer 407, Pluronic F127 and Pluronic F68, and the additive is selected from at least one of poloxamer 188, poloxamer 338, poloxamer 407, Pluronic F127 and Pluronic F68. According to the preparation method, the molecular sieve with high dispersity can be obtained.